SUBJECT INDEX

A

accretion, crust, A1:2-5; B(narrative):9-12

actinolite

alteration, A3:40

alteration vs. depth, A3:141

geochemistry, B4:11; B9:9-10

greenschist facies, B9:18-19

magmatic structures, A3:60

photomicrograph, B9:66

sulfides, B7:6

See also ferro-actinolite

adcumulates, lower oceanic crust, B(synthesis):22-23, 38

age, trondhjemite, A1:7

albite

alteration, B1:5

gabbro, B10:9-11

magnesium number, A3:49

veins, B9:8, 20, 29

See also anorthite/(anorthite+albite) ratio

alteration

compressional wave velocity, B5:7

downhole distribution, A3:33-34

geochemistry, A3:51

lithologic units, B6:3-14

minerals, A3:266

plagioclase, A1:14

shear zones, A1:5

sulfides, B7:6

vs. depth, A1:57

See also hydrothermal alteration

alteration halos, photograph, A1:61; A3:146-147, 161

alteration rims, photograph, A3:147

aluminum

amphibole, B4:11, 20-21

biotite, B9:11

clinopyroxene, B4:10; B10:12

gabbroic rocks, B8:3-4

high-temperature microscopic veins, B4:12-13

hornblende, B10:14

orthopyroxene, B10:14

phlogopite, B9:11

photomicrograph, B4:26, 30, 32

veins, B9:16, 33-36

vs. depth, B1:13

vs. magnesium number, B4:11, 37

vs. sodium + potassium, B4:11, 37, 41

vs. titanium, B4:37

See also strontium/aluminum ratio

aluminum oxide

amphibole, B9:10

apatite, B9:13

chlorite, B9:11

clinopyroxene, B4:10

diopside, B9:10

epidote, B9:12

gabbroic rocks, B6:16-17; B8:4-14

mica, B9:11

natrolite, B9:13

orthopyroxene, B4:10

titanite, B9:14

vs. depth, B6:35

vs. iron oxide, B9:32

vs. magnesium number, B4:34; B10:41

vs. scandium, B8:23

vs. titanium oxide, B4:34-35

See also calcium oxide/aluminum oxide ratio; iron oxide/aluminum oxide ratio

aluminum oxide/magnesium oxide ratio, vs. strontium, A3:51, 173

amphibole

alteration, B6:3-4

alteration vs. depth, A3:139

chemical composition, B4:10-11, 41-42; B9:43-46

composition, B4:36-37

formation temperature, B4:11-12

gabbro, B8:3-14

geochemistry, B8:52-53

high-temperature microscopic veins, B4:25-26

lithologic units, B6:3-14

modal composition, A3:18

olivine gabbro, B4:6-7

olivine gabbro analysis, B4:53-54

photograph, A3:148

photomicrograph, A3:128-129; B4:31-32; B9:64-66

sulfides, B7:5

textures, B4:8-9

thin sections, A3:24-25

veins, A3:42-43; B4:7-8; B9:3-5, 9-10, 17-19, 30

See also actinolite; edenite; hornblende; magnesiohornblende; veins

amphibole, brown

alteration vs. depth, A3:140

high-temperature minerals, A3:35

amphibole, dark green, high-temperature minerals, A3:34-35

amphibole, green

alteration vs. depth, A3:140

moderate-temperature minerals, A3:36

amphibole, magnesium-iron, high-temperature minerals, A3:35

amphibole, secondary

photograph, A3:161

vs. depth, A3:135

amphibole formula, calculation, B4:20-21

amphibole gneiss

lithologic units, B6:3

magnetic susceptibility, B11:16

photograph, A3:160

 

amphibolite, gneissic, structure, A1:7-8
amphibolite, mylonite, A1:14-16

amphibolite facies

metamorphism, A3:45-47

shear zones, A1:8-10

veins, B9:17-19

analcime, alteration, B1:5

anhedral crystals

lithologic units, A3:19-20

scan, A3:125

anisotropy

magnetic susceptibility, A3:75, 222, 288-299

seismic reflection, B5:6

velocity in olivine gabbro, B2:4

vs. depth, B5:32

anorthite

composition vs. depth, B(synthesis):52, 61; B8:12-13, 28-30

crystal mush, B10:23-25

gabbroic rocks, B6:21; B10:9-11, 55

magnesium number, A3:49

olivine gabbro host vs. microgabbro, B8:22

percent in magmatic and vein plagioclase, B4:27

veins, B9:8, 29

vs. depth, B4:22; B6:33; B8:12-13, 28-30; B10:53

vs. forsterite, B10:54

vs. iron oxide, B10:35; B11:68

vs. magnesium number, B8:18

vs. magnesium number in clinopyroxene, B10:42

vs. magnesium number in hornblende, B10:42

vs. magnesium number in olivine, B10:42

vs. magnesium number in orthopyroxene, B10:42

anorthite/(anorthite+albite) ratio

vs. strontium/aluminum ratio, A3:51, 174

vs. titanium oxide, A3:49, 167

anthophyllite, high-temperature minerals, A3:35

apatite

chemical composition, B9:56

modal composition, A3:18; B6:10

olivine gabbro, B4:6-7

veins, B9:13

aragonite, low-temperature minerals, A3:38

Atlantis II Fracture Zone

bathymetry, B5:33

geology, A1:1-70; B(synthesis):47; B(narrative):10-12

lower oceanic crust, B5:1-71

attenuation

data summary, B5:42-69

oceanic crust, B5:14-15

seismic waves, B5:8-9

statistical analysis, B5:70

velocity, B2:3-4, 15-17

vs. depth, B5:31

waveforms, B5:40

augite

exsolution, A3:20

gabbroic rocks, B10:11-12

grain size, A3:16-17

grain size vs. depth, A3:114

igneous rocks, A1:11

lithologic units, A3:16-17; B6:9

photomicrograph, A3:116

reaction textures, A3:21

relative abundance, A3:103-104

scan, A3:125

augite/plagioclase ratio, vs. calcium oxide/aluminum oxide ratio, A3:21, 119

azimuth, vs. depth, B5:32

B

barium

gabbroic rocks, B6:16

veins, B9:16

basalt

chemical composition, B(synthesis):68

melts, B10:26-27

See also ferrobasalt

basalt liquidus temperature, vs. magnesium number, B8:19

bathymetry

Atlantis Bank, A1:6, 45-46; B5:33

map, A4:1-13

biotite, veins, B9:11

blebs

olivine gabbro, B4:6-7

sulfides, A3:27

borehole azimuth, vs. depth, A3:232

borehole deviation, vs. depth, A3:232

boreholes

logging, A3:87

recovery vs. depth, A3:229

breccia

Formation Microscanner imaging, A3:238-239

magnetic susceptibility, B11:13, 48, 56

breccia, magmatic

core photograph, A3:195

magmatic structures, A3:59

magnetic susceptibility, B11:16

vs. depth, A3:193

breccia, tectonic, core photograph, A3:195

breccia, vein, magnetic susceptibility, B11:15-16

brittle deformation

gabbro, A1:15, 18-22; B9:19

magmatic structures, A3:59-63

magnetic susceptibility, B11:16

microstructures, A3:64

brittle microstructures, photomicrograph, A3:194

buoyancy, differentiation, B(synthesis):23-24

C

calc-silicates, moderate-temperature minerals, A3:37

calcite

alteration vs. depth, A3:138

low-temperature minerals, A3:38

magmatic structures, A3:60

photomicrograph, B9:66

See also veins

calcite, vein-forming, X-ray diffraction data, A3:163

calcium

gabbroic rocks, B8:3-4

high-temperature microscopic veins, B4:12-13

hornblende, B10:14

photomicrograph, B4:26, 30, 32

veins, B9:16, 33

calcium number

correlation with clinopyroxene, B8:24

gabbroic rocks, B8:7, 11

olivine gabbro, A3:21; B3:3

vs. clinopyroxene number, B8:24

vs. depth, B8:12-13, 27, 29-30; B10:45-52

vs. gabbro magnetic susceptibility, B11:27-28

vs. magnesium number, A3:21, 120; B3:8; B8:20

vs. sodium number, B3:8

vs. titanium oxide, A3:21, 121

calcium oxide

clay minerals, B9:14

diopside, B9:10

epidote, B9:12

gabbroic rocks, B6:18; B8:4-14

natrolite, B9:13

orthopyroxene, B4:10

thomsonite, B9:13

veins, B9:15

vs. depth, B6:42

vs. magnesium number, B10:41

vs. scandium, B8:23

vs. titanium oxide, B4:35

calcium oxide/aluminum oxide ratio

gabbroic rocks, B8:7, 11, 14

vs. augite/plagioclase ratio, A3:21, 119

vs. magnesium number, B8:20

vs. scandium, B8:23

calcium oxide/sodium oxide ratio, thomsonite, B9:13

caliper logs

electrofacies, A3:247-251

shear wave velocity, B5:41

vs. depth, A3:232, 234, 236; B5:26

carbon dioxide

gabbroic rocks, B6:18

veins, B9:15

volatiles, A3:281

vs. depth, B6:47

carbon isotopes, carbonates, B1:6

carbonates

chemical composition, B9:59

genesis, B1:6

low-temperature minerals, A3:38

photomicrograph, B9:65

veins, A3:43; B9:6-7, 14

See also aragonite; calcite; veins

cataclasis

gabbro, A1:18-22; B9:19

intensity vs. depth, A3:196

cataclasite

core photograph, A3:195

photomicrograph, A1:65; A3:194

cataclastic deformation, magmatic structures, A3:59-63

cataclastic faults, vs. depth, A3:199

chadacrysts

mineral inclusions, A3:20; B4:8

photomicrograph, B4:29-30

chalcopyrite

gabbroic rocks, B7:5-9

moderate-temperature minerals, A3:37

photomicrograph, A3:128; B7:15-16

chemical discontinuities, intrusions, B10:18-25, 48-52

chemical stratigraphy, gabbro, A3:51-53; B(synthesis):14-17, 32-45; B10:16-21, 23-25

chlorite

alteration, B1:4-5; B6:4

chemical composition, B1:10; B9:49-50

greenschist facies, B9:18-19

magmatic structures, A3:60

moderate-temperature minerals, A3:36

sulfides, B7:6

veins, A3:45; B9:11

See also veins

chlorite, secondary, vs. depth, A3:135

chlorite/smectite composition, chemical composition, B1:10

chrome-spinel, photomicrograph, A3:127, 129-130

chromite. See ferrichromite

chromium

clinopyroxene, B10:12

gabbroic rocks, B6:19; B8:3-14

hornblende, B10:14

vs. clinopyroxene number, B8:25

vs. depth, B6:51; B8:12-13, 27, 29-30

vs. magnesium number, B8:25

vs. magnesium oxide, A3:49, 169

chromium diopside, lithologic units, A3:13-14

chromium oxide

diopside, B9:10

vs. magnesium number, B10:39, 41

clasts, core photograph, A3:195

clay minerals

chemical composition, B9:58

veins, B9:14

See also chlorite/smectite composition; montmorillonite, magnesium; smectite

cleavage planes, gabbro magnetic susceptibility, B11:22- 23

clinopyroxene

alteration, A3:40; B4:7-8

alteration vs. depth, A3:136

chemical composition, B4:9-10; B6:21, 71-73

classification, B4:33

composition, B4:34

correlation with calcium number and magnesium number, B8:24

crystal mush, B10:23-25

formation temperature, B4:11-12

gabbro, B8:3-14; B10:11-12

geochemistry, B8:43-48; B10:57

grain size, A3:113

intrusions, B10:18-19

lithologic units, B6:3, 5-14

magnetic susceptibility, B11:64

mineral chemistry, B10:15

modal composition, A3:18; B3:4-5

modal percent vs. modal percent olivine, A3:115

modal percent vs. modal percent plagioclase, A3:115

neoblasts, B9:17-19

olivine gabbro, B4:6-7

olivine gabbro analysis, B4:49-50

photograph, A1:61; A3:148

photomicrograph, A3:127; B4:23-24, 28-32, 39-40

sulfides, B7:6

textures, A3:63; B4:8-9, 12

veins, A3:41-42

vs. depth, B6:32; B10:38, 45-51

vs. major elements, B10:39

zoning, B10:12

clinopyroxene, altered, alteration vs. depth, A3:140

clinopyroxene, secondary, alteration vs. depth, A3:140

clinopyroxene magnesium number

vs. forsterite, B10:43

vs. hornblende magnesium number, B10:44

vs. orthopyroxene magnesium number, B10:43

clinopyroxene number

vs. calcium number, B8:24

vs. chromium, B8:25

vs. magnesium number, B8:24

vs. nickel, B8:25

vs. niobium, B8:26

vs. scandium, B8:23

vs. strontium, B8:26

vs. titanium oxide, B8:25

vs. vanadium, B8:25

vs. yttrium, B8:26

vs. zirconium, B8:26

clinopyroxenite, abundance and composition, A3:258-259

cobalt

gabbroic rocks, B8:4-14

sulfides, B7:6-9

cobalt, in pentlandite, vs. depth, B7:20

composite intervals, olivine gabbro, B(synthesis):12-14

compressional wave velocity

data summary, B5:42-69

downhole measurements, B5:9-10

igneous rocks, A1:25; A3:80-81, 307-312; B2:2-4, 7-11, 19

oceanic crust, B5:14

synthetic seismograms, B5:34-35

vs. density, B2:13; B5:29

vs. depth, A3:231; B5:25, 27

vs. porosity, B2:12; B5:28

vs. shear wave velocity, B2:14

well-logs, B5:36-37

confining pressure, attenuation, B5:8-9

cooling, crust, B9:21-22

copper

gabbro, A3:49-50

gabbroic rocks, B6:19; B8:4-14

sulfides, B7:7-9

vs. depth, B(synthesis):64; B6:53; B7:21; B8:12-13, 27, 29-30

vs. nickel, B7:22

core complexes, structure, B(narrative):10-12

core-log integration

average data, B5:71

downhole measurements, B5:12-13

cores, orientation, B5:39

correlation, gabbro, Site 735; B(synthesis):43-45

covariations, silicates, B10:15

cracking front model, magmatic fluids, B4:15

cracks. See microcracks

crescumulate texture

igneous layering, A3:29-30

olivine gabbro, A1:12

cross sections, tectonics, A1:49-50

crust

compressional wave velocity, B5:7

cooling, B9:21-22

structure, B(narrative):9-11

crust, lower oceanic

composition, B3:1-13; B6:1-82

contruction, B(synthesis):18-23

hydrothermal alteration, B1:1-24

magma chambers, B(synthesis):4-6

silicates, B10:1-60

structure, A1:2-5

velocity structure, B5:1-71

crust-mantle transition, lower oceanic crust, B(synthesis):22-23

cryptic variation, magnetic susceptibility, B11:10, 24-25

crystal mush, intrusions, B10:23-25

crystal zoning, mineral texture, A3:20

crystal-plastic deformation

intensity vs. depth, A3:185-186

magma chambers, B(synthesis):4-6

shear zones, A1:5, 15, 18-22; A3:55-58; B(synthesis):10

vs. magnetic susceptibility, B11:60, 63

See also crystal-plastic structures

crystal-plastic foliation

dip vs. depth, A3:188

intensity vs. depth, A3:184

crystal-plastic microstructures, photomicrograph, A3:190-191

crystal-plastic structures

correlation with amphibole veins, A3:211-212; B9:21-22

correlation with oxides, A3:210

differentiation, B10:19-22

magmatic structures, A3:56-58, 65-69; B6:5-7, 11-12, 23

photograph, A3:159

photomicrograph, A3:205-207

crystallization

lower oceanic crust, B(synthesis):18-22, 25-26

magmas, B10:24-25

pressure-temperature conditions, B8:5-14

temperature, B4:11-12

crystallization wall, nickel, B12:5

crystals, zoned, plagioclase veins, B9:4

cummingtonite, high-temperature minerals, A3:35

cumulates

crystallization, B8:5-14

geochemistry, B3:3-5; B6:23

lower oceanic crust, B(synthesis):18-22; B10:27

cupolas, lower oceanic crust, B(synthesis):20-22

D

debris flows, structure, A1:6-8

deformation

alteration, A3:38; B6:4-7

data summary, B5:42-69

fluids, B4:13-14

intergrowths, B4:13-14

magnetic susceptibility, B11:12, 29

oxide, A3:22-23, 124

relationship to oxide gabbros, B11:18-20

scan, A3:123-125

shear zones, A1:8-10, 18-22; B10:22

See also brittle deformation; cataclastic deformation; crystal-plastic deformation; crystal-plastic structures; plastic deformation; semi-brittle deformation 

deformation, low-temperature, magmatic structures, A3:59-61

deformation fabric, lithologic units, A3:19

deformation grades, vs. magnetic susceptibility, B11:63

deformation intensity

vs. depth, A3:126

vs. magnetic susceptibility, B11:60

demagnetization

gabbro, A3:71-77

vector end-point diagrams, A3:220-221

density

downhole measurements, B5:9-10

igneous rocks, A1:24; A3:79-80; B2:2-3, 7-11

vs. compressional wave velocity, B2:13; B5:29

density, bulk

vs. depth, A1:69; A3:228, 301

vs. GRAPE density, A3:223

vs. shear wave velocity, B5:29

density, GRAPE

igneous rocks, A3:77

vs. bulk density, A3:223

vs. depth, A3:227, 301

density logs

electrofacies, A3:247-251

vs. depth, A3:233-234; B5:26

detachment faults

fluid circulation, B9:21-22

structure, A1:7; B(narrative):9-12

diabase

composition, B(synthesis):46

tectonics, A1:6-8

differentiation

gabbro, B10:16-21, 24-27

intrusions, B(synthesis):11

magnetic susceptibility, B11:9-11, 17

shear zones, A1:3-5

differentiation, late-stage, lower oceanic crust, B(synthesis):23-24

dikelets, petrology, A3:32-33

dikes, basalt, Site 735; B(synthesis):44; B6:3

dikes, sheeted, oceanic crust, B5:13

diopside

alteration vs. depth, A3:138

chemical composition, B9:47

high-temperature minerals, A3:34

mineral chemistry, B10:36-37

photomicrograph, B9:64-65

veins, A3:42-43; B9:6, 10, 17-19, 31

See also chromium diopside; veins

diorite

petrology, A1:13-14; B6:11

veins, B8:9-10

See also gabbrodiorite; leucodiorite; oxide diorite; veins

dip

faults, A3:60-61, 198

foliation, A3:180, 244; B5:30

igneous contacts, A3:55-58

veins, A3:244

vs. depth, A3:182-183

downhole measurements

density, B5:9-12

shore-based interprestion, A3:92-96

Site 735, A1:25-26; A3:81-96, 314

drilling

photomosaic of hard rock base, B(narrative):20

Site 735, B(narrative):6-9

E

East Pacific Rise, lower oceanic crust, B(synthesis):23

edenite

geochemistry, B4:11; B9:9-10

veins, B9:30

electrofacies

fractures, A3:246

resistivity, A3:247-251

enstatite, mineral chemistry, B10:36-37

epidote

alteration, B6:3-5

alteration vs. depth, A3:138

chemical composition, B9:52

greenschist facies, B9:18-19

magmatic structures, A3:60

moderate-temperature minerals, A3:37

veins, A3:45; B9:12

See also veins

eruptions

lower oceanic crust, B(synthesis):18-22

melts, B10:26-27

euhedral crystals, lithologic units, A3:19-20

exsolution

gabbro magnetic susceptibility, B11:23

photomicrograph, A3:116; B11:66-67

exsolution textures

lithologic units, A3:20-21

photomicrograph, A3:116

F

fabric

correlation between magmatic and crystal-plastic fabrics, A3:181, 208

correlation with oxides, A3:210

gabbro, A1:18-22

intensity, A3:179

intensity vs. depth, A3:180-181

magmatic structures, A3:56-58, 179; B10:22

microscopic vs. macroscopic observations, A3:64-65

photomicrograph, A3:205-207

See also deformation fabric

fault zones, oceanic crust, B5:13

faulting, asymmetric, structure, B(narrative):9-12

faults

dip, A3:60-61, 198

dip vs. depth, A3:196

Formation Microscanner imaging, A1:25-26; A3:240

intensity vs. depth, A3:196, 211, 235

magmatic structures, A3:59-61

magnetic susceptibility, B11:17, 69

shear zones, A1:4-5

spreadsheets, A1:39

stereographs, A3:197

See also cataclastic faults; detachment faults; microfaults; reverse faults; transform faults

feeder pipes, lower oceanic crust, B(synthesis):20-22

feldspar

electron microprobe data, B1:23-24; B9:39-42

gabbro, B10:32

mineral texture, A3:19

sulfides, B7:6

veins, B9:8-9

See also albite; anorthite; anorthite/(anorthite+albite) ratio; augite/plagioclase ratio; plagioclase; potassium feldspar; quartz-microcline; quartz-plagioclase

feldspar, sodic, moderate-temperature minerals, A3:36

felsic rocks

chemical composition, A1:70

petrology, A1:13-14

See also veins

ferrichromite, photomicrograph, A3:130

ferro-actinolite, photomicrograph, B9:66

ferrobasalt

lower oceanic crust, B(synthesis):18-22

plutons, B(synthesis):53

ferrobasalt magma, lower oceanic crust,
B(synthesis):18-22

ferrogabbro

chemical composition, B8:13-14; B12:3-5

differentiation, B10:16-21

titanophile elements, B12:13

ferromagnesians

mineral chemistry, B10:15

vs. plagioclase, B10:15

ferrosilite, mineral chemistry, B10:36-37

fissures, lower oceanic crust, B(synthesis):20-22

fluid circulation

hydrothermal reactions, B9:21-22

shear zones, A1:16

fluid circulation, high-temperature, Oceanic Layer 3 gabbros, B4:1-56

fluid flow, microcracks, B10:17

fluid inclusions, magma chambers, B4:14

fluids

deformation, B4:13-14

high-temperature microscopic veins, B4:12-13

origin, B4:13-14

foliation

dip, A3:244; B5:30

dip vs. depth, A3:180, 184

intensity vs. depth, A3:180

magmatic structures, A3:54-58, 65-69; B10:22

metamorphism, A3:45-47

olivine gabbro, A1:12, 18-22; B6:4-7

photograph, A3:160, 209; B5:30

photomicrograph, A3:191

structure, A1:6-8

See also crystal-plastic foliation; gabbro

foliation, magmatic

igneous layering, A3:29-30

photomicrograph, A1:65; A3:205

foliation, mylonitic, dip vs. depth, A3:188

foliation intensity, crystal-plastic, vs. depth, A1:64

foliation intensity, magmatic, vs. depth, A1:64

foliation, retrograde, dip vs. depth, A3:188

Formation Microscanner imaging

faults, A3:240

structures, A3:240-243

vs. depth, B5:32

Formation Microscanner logs

Site 735, A3:92, 237-239

structure, A1:25-26

vs. depth, A3:234, 236

forsterite

composition vs. depth, B(synthesis):52, 61; B8:12-13, 28-30

crystal mush, B10:23-25

gabbro, B10:14, 55

olivine gabbro host vs. microgabbro, B8:22

vs. anorthite, B10:54

vs. clinopyroxene magnesium number, B10:43

vs. depth, B10:53

vs. magnetic susceptibility, B11:24-25, 69

vs. nickel oxide, B10:40

vs. orthopyroxene magnesium number, B10:43

forsterite magnesium number, vs. hornblende magnesium number, B10:44

fractional crystallization

gabbro, B3:4-5; B10:8-12

gabbroic rocks, B8:5-14

fracture zones

lower oceanic crust, B5:1-71

shear zones, A1:3-5

structure, B(narrative):9-11

fractures

electrofacies, A3:246

intergrowths, B4:13-14

magmatic structures, A3:61; B10:22

olivine, A3:39

orientation, A3:61

well-logs, A3:245

See also microfractures

G

gabbro

abundance and composition, A3:256-259

alteration, A1:14-16; B1:3-6

chemical composition, A1:70; A3:268-280; B(synthesis):46, 68

chemical stratigraphy, B(synthesis):14-17, 33-45; B10:16-21

clinopyroxene, B10:11-12

correlation, Site 735; B(synthesis):43-45

dredge hauls, B(narrative):18

fluid flow, B4:1-56

foliation, B5:30

geochemistry, B(synthesis):1-69; B12:1-18

grain size vs. depth, A3:114

lithologic units, A3:14; B6:6, 10-11

locations and composition, B(synthesis):67

magnetic susceptibility, B11:1-69

mineralogy, B(synthesis):17-18

model composition, B8:60

petrology, A1:12-14

photograph, A3:111, 209

scan, A3:123-125

stratigraphy and composition, B(synthesis):1-69

structure, A1:3-5; B(synthesis):25-26

tectonics, A1:6-8; B10:25-27

textures, A3:109

See also ferrogabbro; microgabbro; olivine gabbro; oxide gabbro; oxide-olivine gabbro

gabbro, foliated, photograph, A1:54

gabbro, gneissic, magnetic susceptibility, B11:61, 63

gabbro, iron-titanium, alteration photograph, A3:142

gabbro, mylonitized, photograph, A3:147

gabbro, oceanic, empirical velocity relations, B2:4

gabbro, orthopyroxene-bearing, abundance and composition, A3:256-259

gabbro, pegmatitic, magnetic susceptibility, B11:16

gabbro, troctolitic

abundance and composition, A3:256-259

chemical composition, A1:70

lithologic units, A3:13-15; B6:9-10

olivine, B10:14

gabbro, trondhjemitic, photograph, A3:147

gabbrodiorite, petrology, A3:31-33

gabbroic rocks

composition, B3:1-13; B6:82; B8:1-60

mineral chemistry, B4:45; B8:1-60

petrogenesis, B8:5-14

structures, A3:67-69

sulfides, B7:1-29

gabbronorite

abundance and composition, A3:256-259; B8:13-14

alteration photograph, A3:143

chemical composition, B3:4

clinopyroxene, B10:11-12

lithologic units, A3:14; B(synthesis):11; B6:5-6, 11

olivine, B10:14

orthopyroxene, B10:13-14

petrology, A1:12-14

plagioclase, B10:9-11

shear zones, A1:8-10

See also oxide gabbronorite

galena, gabbroic rocks, B7:5-7

gallium

gabbro, B8:4-14

veins, B9:16

gamma-ray logs 

A3:81-84

vs. depth, A3:233

geochemistry

database, B6:80

gabbros, B(synthesis):1-69; B6:14-20; B7:27-29; B8:1-60; B11:1-18

Site 735, A1:16-18; A3:21-22, 47-54; B3:1-13

geothermometry, veins, B9:17-19, 37

globules

photomicrograph, B7:15

sulfides, A3:27; B7:4-5, 8-9

gneiss. See amphibole gneiss; amphibolite

gneissic texture, deformation, B11:18-20, 61

gradational contacts, lithologic units, A3:16

grain size

igneous layering, A3:29-30

lithologic units, A3:16-17

olivine gabbro, A1:12

photograph, A3:133

grains, photomicrograph, B7:16

granite

petrology, A1:13

veins, A3:29; B8:9-10

granulite facies

metamorphism, A3:45-47

petrology, A1:15

shear zones, A1:5

veins, B9:17-19

greenschist facies, veins, B9:18-19

H

halos, veins, A3:29, 42

hematite

alteration vs. depth, A3:138

low-temperature minerals, A3:38

See also ilmenite-hematite-magnetite solid solution

high-temperature minerals, secondary minerals, A3:34-35

Hole 735B

geology, A1:1-70

narrative history, B(narrative):1-20

hornblende

alteration, A3:40

alteration vs. depth, A3:138

gabbro, B10:14-15

geochemistry, B10:60

mineral chemistry, B10:15

vs. depth, B10:46

See also magnesiohornblende

hornblende magnesium number

vs. clinopyroxene magnesium number, B10:44

vs. forsterite magnesium number, B10:44

hydrothermal alteration

gabbro, A1:14-16

titanium, A3:25-26

veins, B9:19-22

vs. depth, A3:135-141

vs. vein abundance, A3:137

See also alteration; magmatic-hydrothermal transition

hydrothermal alteration, low-grade, uplifted lower oceanic crust, B1:1-24

hydrothermal reactions

fluid circulation, B9:21-22

metamorphism, A3:45-47

I

iddingsite, low-temperature minerals, A3:38

igneous contacts

lithologic units, A3:15-16, 264

magmatic structures, A3:56

photograph, A3:132

schematic representation, A3:112

igneous layering

lithologic units, A3:29-30, 32-33

magmatic structures, A3:55

photograph, A3:133

igneous petrology, Site 735, A1:11-14; A3:12-33

igneous rocks

chemical composition, A3:268-280

lithostratigraphy, A3:12-16

photomosaic, A3:101

primary modes, A3:265

spreadsheets, A1:31-34

igneous seams, gabbro, B(synthesis):9

igneous series, chemical stratigraphy, B(synthesis):17

ilmenite

chemical composition, B9:54

melts, B8:8-9

modal composition, A3:18; B6:79

photomicrograph, A3:127-130

thin sections, A3:23-28

veins, B9:12-13

vs. gabbro magnetic susceptibility, B11:20-29

ilmenite-hematite-magnetite solid solution, melts, B8:8-9

inclusions

magnetite, B11:23

sulfides, B7:4-5

See also mineral inclusions

index properties

data summary, B5:42-69

igneous rocks, A3:79-80

Indian Ridge SW

fluid flow, B4:1-56

gabbros, B(synthesis):1-69

geology, A1:1-70; B(narrative):9-12

lithology, B6:1-82

silicates, B10:1-60

sulfides, B7:1-29

veins, B9:1-66

intergranular textures, photograph, A3:106

intergrowths

deformation, B4:13-14

photomicrograph, B4:29-32, 39-40

sulfides, B7:5-7

temperature, B4:11-12

textures, B4:8-9, 55

vs. depth, B4:22

intergrowths, myrmekitic, plagioclase veins, B9:4

intrusions

petrology, A1:12-14

photograph, A3:209

stratigraphy, B10:20-23

structure, A1:3-5, 8-10; A3:65-66

See also layered intrusions

intrusive contacts, lithologic units, A3:15-16

iron

enrichment, B10:18

gabbroic rocks, B6:16; B8:3-4

ilmenite, B9:13

sulfides, B7:5-9

iron, in pyrrhotite, vs. depth, B7:17

iron-titanium oxide

clinopyroxene, B4:10

gabbro, B3:3-5; B6:4; B8:3-14

geochemistry, B8:50-51

modal composition, A3:18

olivine gabbro, B4:6-7

iron/magnesium ratio, diopside, B9:10, 65

iron oxide

amphibole, B9:10

biotite, B9:11

chlorite, B9:11

epidote, B9:12

gabbroic rocks, B6:16-17; B8:4-14; B11:3

ilmenite, B9:13

mica, B9:11

titanite, B9:14

veins, B9:15

vs. aluminum oxide, B9:32

vs. anorthite, B10:35; B11:68

vs. depth, B6:37

vs. gabbro magnetic susceptibility, B11:20, 23

vs. modal oxide abundance, A3:21

vs. titanium oxide, B12:9

vs. zinc, A3:49, 170

iron oxide/aluminum oxide ratio, epidote, B9:12

iron oxide/titanium oxide ratio, gabbro, B12:3

iron ratio

amphibole, B4:20

vs. magnesium number, B4:42

vs. silicon, B4:20, 42

isotopes

hydrothermal alteration, B1:1-24

veins, B1:14

See also carbon isotopes; oxygen isotopes; strontium isotopes

J

joints, orientation, A3:61-63

K

Koenigsberger ratio

logarithm distribution, A3:219

magnetic intensity, A3:73

vs. depth, A3:218

L

lamination, igneous, igneous layering, A3:29-30

lanthanum/ytterbium ratio

gabbroic rocks, B6:20

vs. depth, B6:58

vs. ytterbium, B6:60

lanthanum oxide, titanite, B9:14

laterologs, vs. depth, A3:232

Layer 3, lower oceanic crust, B5:3-4

layered intrusions

lithologic units, B(synthesis):11, 36-45; B10:20-21

lower oceanic crust, B(synthesis):18-22

petrology, A3:30-33

lenses, sheared, scan, A3:124

leucodiorite

petrology, A1:13-14

photograph, A3:132

veins, A3:29; B8:9-10

Ligurian gabbros, differentiation, B10:26

liquids, crystallization, B8:5-14

liquidus temperature

vs. magnesium number, B8:19

vs. silica, B8:21

vs. titanium oxide, B8:21

lithium, gabbro, B8:4-14

lithologic units

chemical stratigraphy, B(synthesis):14-17

igneous rocks, A1:52; A3:261-263; B6:65

Site 735, A3:13-15

Unit I, B6:3

Unit II, B6:3

Unit III, B6:4

Unit IV, B6:4

Unit IX, A3:14; B6:6

Unit V, B6:5

Unit VI, A3:13-14; B6:5

Unit VII, A3:14; B6:5

Unit VIII, A3:14; B6:5

Unit X, A3:14; B6:6

Unit XI, A3:14-15; B6:6

Unit XII, A3:15; B6:6-7

lithology index, magnetic susceptibility, B11:1-69

lithostratigraphy

igneous rocks, A3:12-16; B(synthesis):7-11, 49; B5:24; B6:2-7, 29; B10:20-21

vs. depth, A3:102

low-temperature minerals, secondary minerals, A3:37-38

M

magma chambers

fluid inclusions, B4:14

lower oceanic crust, B(synthesis):20-22

models, B(synthesis):4-6, 37-38, 48; B6:22

magma injection

lower oceanic crust, B(synthesis):22-23

magnetic susceptibility, B11:10

magmas

crystallization, B10:24-25

injection, B(synthesis):12-14

lithologic units, A3:15-16

petrology, A3:31-33

structure, A1:2-5

veins, B9:19-22

magmas, mafic, sulfides, B7:7-9

magmatic foliation. See foliation, magmatic

magmatic structures, textures, A3:54-58, 65-69

magmatic-hydrothermal transition, fluid flow, B4:1-56

magmatic-metamorphic transition, fluid migration, B4:4-5

magnesiohornblende

geochemistry, B4:11; B9:9-10

photomicrograph, B9:66

veins, B9:30

magnesium

biotite, B9:11

gabbroic rocks, B8:3-4

veins, B9:33-34

See also iron/magnesium ratio

magnesium number

amphibole, B4:20

basalt glasses, Atlantic II Fracture Zone, B10:27

chemical stratigraphy, A3:51-53; B(synthesis):16, 33-45; B6:22-23

clinopyroxene, B8:18-19; B10:12

correlation with clinopyroxene, B8:24

crystal mush, B10:23-25

diopside, B9:10

gabbro, A3:53; B(synthesis):17-18; B3:3; B6:16-17, 21; B8:5-14; B12:3

hornblende, B10:14

igneous rocks, A1:17-18; A3:49-50

intrusions, B10:18-19

olivine, B8:18-19

olivine gabbro, A3:21

olivine gabbro host vs. microgabbro, B8:22

orthopyroxene, B8:18-19; B10:14

silicates, B10:42

vs. aluminum, B4:11, 37

vs. aluminum oxide, B4:34; B10:39, 41

vs. anorthite, B8:18

vs. basalt liquidus temperature, B8:19

vs. calcium number, A3:21, 120; B3:8; B8:20

vs. calcium oxide, B10:41

vs. calcium oxide/aluminum oxide ratio, B8:20

vs. chromium, B8:25

vs. chromium oxide, B10:39, 41

vs. clinopyroxene number, B8:24

vs. depth, A1:62; A3:48-50, 52, 166, 175-176; B(synthesis):51, 57-60, 64-66; B3:9; B4:22; B6:31, 40-41; B7:14; B8:12-13, 27-30; B10:45-51; B12:8

vs. forsterite, B10:43-44

vs. gabbro magnetic susceptibility, B11:22-23, 27-28

vs. iron ratio, B4:42

vs. magnetic susceptibility, B11:65

vs. nickel, B8:25

vs. niobium, B8:26

vs. potassium oxide, B10:41

vs. sodium number, B3:8

vs. sodium oxide, B10:39, 41

vs. strontium, B8:26

vs. titanium oxide, B4:34; B8:25; B10:39, 41; B11:64

vs. vanadium, B8:25

vs. yttrium, B8:26

vs. zirconium, B8:26

See also forsterite magnesium number; hornblende magnesium number; orthopyroxene magnesium number

magnesium oxide

carbonates, B9:14

chlorite, B9:11

gabbro, A3:53

gabbroic rocks, B6:17; B8:4-14

mica, B9:11

phlogopite, B9:11

veins, B9:15

vs. chromium, A3:49, 169

vs. depth, B6:39

vs. nickel, A3:49, 168

See also aluminum oxide/magnesium oxide ratio

magnetic anomalies

gabbro, B(synthesis):25-26

maps, A1:47

structure, A1:7-8, 22-23

magnetic declination

gabbro, A3:71-72

vs. depth, A3:214-215, 217

magnetic inclination

gabbro, A1:22-23; A3:71-72

logarithm distribution, A3:219

vs. depth, A1:67; A3:214-215, 217, 222

magnetic intensity

gabbro, A3:71-77

vs. depth, A3:214, 217

magnetic properties, discrete samples, A3:282-287

magnetic susceptibility

anisotropy, A3:75, 222, 288-299

igneous rocks, A1:24; A3:70-77

lithology index, B11:1-69

physical properties, A3:77-78

response functions of sensor, A3:224

vs. deformation grades, B11:63

vs. deformation intensity, B11:60

vs. depth, A1:67; A3:213, 225-226, 300; B11:8-10, 33-34, 36-54, 56, 58, 60, 62

vs. forsterite, A11:24-25, 69

vs. gabbro mineral composition, B11:20-29

vs. magnesium number, B11:65

vs. titanium oxide, B11:65

vs. vein numbers, B11:57

magnetic susceptibility, minicore, vs. sensor magnetic susceptibility, B11:35

magnetic susceptibility, sensor, vs. minicore magnetic susceptibility, B11:35

magnetic susceptibility, volume

logarithm distribution, A3:219

vs. depth, A3:218

magnetic susceptibility logs

gabbros, B11:10-11

vs. depth, A1:68

magnetite

deformation, A3:22-23, 124

high-temperature minerals, A3:35

inclusions, B11:23

magnetic susceptibility, A3:70-71

modal composition, A3:18

photomicrograph, A3:127; B11:66-67

thin sections, A3:23-28

vs. gabbro magnetic susceptibility, B11:20-29

See also ilmenite-hematite-magnetite solid solution

major elements

clinopyroxene, B10:11-12, 39

gabbroic rocks, B3:1-13; B6:16-18, 81; B8:3-8, 10-14, 54-59; B12:1-18

igneous rocks, A1:17-18

veins, B9:60-61

manganese, gabbroic rocks, B8:3-4

manganese oxide

chlorite, B9:11

diopside, B9:10

gabbroic rocks, B6:17; B8:4-14

ilmenite, B9:13

vs. depth, B6:38

mantle

structure, A1:3

thermal boundary layer, B8:8

See also crust-mantle transition

marcasite, low-temperature minerals, A3:38

mean destructive field, vs. depth, A3:218

megamullions, structure, B(narrative):9-12

melts

crystallization, B8:5-14; B10:27

layered intrusions, A3:30-33; B10:19-22

model composition, B8:60

shear zones, A1:5; B6:22-25

tectonic controls of migration, B10:22

metagabbro

foliation, B5:30

lithologic units, B6:3, 8

photomicrograph, B5:30

metamorphic petrology, A1:14-16; A3:33-47; B1:3-6

metamorphic rocks, spreadsheets, A1:35-38

metamorphism

neoblasts, B9:17-19

shear zones, A1:5; B6:20-23

temperature, A3:45-47

See also magmatic-metamorphic transition

metamorphism, high-temperature, gabbro, A1:15

mica

chemical composition, B9:48

veins, B9:11

microcline. See quartz-microcline

microcracks

attenuation, B5:8-9

differentiation, B10:17

microfaults, magmatic structures, A3:59-61

microfractures

intensity vs. depth, A3:204

orientation, A3:63

photograph, A3:189

microgabbro

abundance and composition, A3:258-259; B8:13-14

composition vs. that of olivine gabbro, B8:22

intrusions, B10:20

lithologic units, A3:15, 65-66

origin, B8:10

petrology, A1:12-14; A3:32-33

photograph, A3:108, 209

See also olivine microgabbro; oxide microgabbro; oxide olivine microgabbro

microgabbro, troctolitic

photograph, A3:107

shear zones, A1:8-10

microstructures

gabbros, A3:63-64

textures, A3:63

See also brittle microstructures; crystal-plastic microstructures; semi-brittle microstructures; structures

microstructures, high-temperature, recrystallization, A3:63-64

mid-ocean ridges, magmatic-hydrothermal transition, B4:1-56

mineral chemistry

gabbroic rocks, B4:45; B8:1-60

silicates, B10:1-60

sulfides, B7:5-7, 26

mineral composition, vs. gabbro magnetic susceptibility, B11:20-29

mineral inclusions, lithologic units, A3:20-21

mineral integrowths, lithologic units, A3:21

mineral textures, lithologic units, A3:19-20

mineralogy

data summary, B5:42-69

downhole variations, B6:13-14

gabbro, B(synthesis):17-18

modal composition

igneous layering, A3:29-30; B8:10-11

lithologic units, A3:17-18; B6:7-14, 61-64

modal oxide abundance

vs. iron oxide, A3:21

vs. titanium oxide, A3:21

moderate-temperature minerals, secondary minerals, A3:36-37

montmorillonite, magnesium

alteration, B1:5

chemical composition, B1:10

mullions. See megamullions

mylonite

amphibolite, A1:14-16

differentiation, B10:18-19

lithologic units, A3:15

magnetic susceptibility, B11:18-20, 63

photograph, A3:187

photomicrograph, A1:65

See also gabbro

mylonitic foliation. See foliation, mylonitic

mylonitic texture

lithologic units, A3:18-19; B6:3

microscopic vs. macroscopic observations, A3:64-65

photomicrograph, A3:207

myrmekitic texture, felsic veins, B9:33

N

natrolite

alteration, B1:5

photomicrograph, B9:65-66

veins, B9:13

natrolite, vein-forming, X-ray diffraction data, A3:145

neoblasts

gabbro magnetic susceptibility, B11:23

veins, B9:17-19

nickel

gabbro, A3:53; B(synthesis):43; B3:3; B12:5

gabbroic rocks, B6:19; B8:3-14

olivine, B10:14

sulfides, B7:5-9

veins, B9:16

vs. clinopyroxene number, B8:25

vs. copper, B7:22

vs. depth, B(synthesis):58-59, 64-66; B3:9; B6:50; B7:21; B8:12-13, 27, 29-30

vs. magnesium number, B8:25

vs. magnesium oxide, A3:49, 168

vs. scandium, B3:11

vs. titanium oxide, B12:10

nickel, in pentlandite, vs. depth, B7:19

nickel, in pyrrhotite, vs. depth, B7:18

nickel oxide, vs. forsterite, B10:40

niobium

gabbro, A3:50; B6:16; B8:4-14

vs. clinopyroxene number, B8:26

vs. magnesium number, B8:26

vs. zirconium, B3:7

See also zirconium/niobium ratio

nontronite, chemical composition, B1:10

norite. See gabbronorite; oxide gabbronorite

nuclear logs, A3:88-89

O

Oceanic Layer 3, fluid flow, B4:1-56

oikocrysts

lithologic units, A3:19

photomicrograph, B4:29-30

oligoclase, veins, B9:20

olivine

alteration, A3:39; B6:4-6

alteration vs. depth, A3:136

composition vs. depth, B(synthesis):52, 61; B6:21

downhole variations, B6:13-14

exsolution, A3:20

gabbro, B(synthesis):40; B6:66-68; B8:3-14; B10:14

geochemistry, B8:31-35; B10:58

grain size, A3:16-17, 113

grain size vs. depth, A3:114

high-temperature microscopic veins, B4:25-26

igneous rocks, A1:11

lithologic units, A3:15; B6:3-9

magnetic susceptibility, B11:25-26

mineral chemistry, B10:15

modal composition, A3:17-18

modal percent vs. modal percent clinopyroxene, A3:115

olivine gabbro, B(synthesis):12-14

olivine gabbro analysis, B4:48

photograph, A1:61; A3:148

photomicrograph, A3:117, 127, 129, 206-207; B4:23-24, 28-30, 39-40

pseudomorphs, A3:37

reaction textures, A3:21

relative abundance, A3:103

scan, A3:125

sulfides, B7:6-9

textures, A3:63

vs. depth, B6:30; B10:45-51

olivine, altered, alteration vs. depth, A3:139

olivine gabbro

abundance and composition, A3:256-259

chemical composition, A1:70; B3:2-13; B8:13-14

chemical stratigraphy, B(synthesis):35-37, 41-45

clinopyroxene, B10:11-12

composition vs. that of microgabbro, B8:22

differentiation, B10:16-21

grain size, B(synthesis):12-14

high-temperature microscopic veins, B4:6-7

hornblende, B10:14

lithologic units, A3:14-15; B(synthesis):7-14; B6:3-7, 9

lower oceanic crust, B(synthesis):18-22; B10:22-25

magnetic susceptibility, B11:8, 18-20, 47, 53

olivine, B10:14

petrology, A1:12-14

photograph, A1:53-56; A3:105-108, 110, 148

photomicrograph, B4:23-24, 28-32, 39-40; B11: 66-67

plagioclase, B10:9-11

scan, A3:125

structure, A1:3-5, 8-10

thickness vs. cumulative thickness at sequence centers, B(synthesis):50, 54-56

See also oxide olivine microgabbro; oxide-olivine gabbro; veins

olivine gabbro, compound, lithologic units, A3:13-14

olivine gabbro, pegmatoidal, photograph, A1:55

olivine gabbro, varietextured, photograph, A1:55

olivine microgabbro

petrography, B6:9

photograph, A1:53

Oman ophiolite, lower oceanic crust, B(synthesis):22-23; B10:25-27

opaque minerals

lithologic units, A3:22-23

modal composition, A3:18

ophiolite, structure, A1:2-5

ophiolite model, petrology, A3:31-33; B10:25-27

ophitic texture

lithologic units, A3:19

olivine gabbro, B4:6-7

photograph, A3:105

orthoclase, gabbro, B10:9-11

orthopyroxene

alteration, A3:39-40; B4:7-8

chemical composition, B4:10

composition, B4:35; B6:69-70

formation temperature, B4:11-12

gabbro, B8:3-14; B10:13-14

geochemistry, B8:49; B10:59

high-temperature microscopic veins, B4:25-26

igneous rocks, A1:11

lithologic units, A3:14; B6:4-14

mineral chemistry, B10:15

mineral texture, A3:19

modal composition, A3:18

neoblasts, B9:17-19

olivine gabbro, B4:6-7

olivine gabbro analysis, B4:51-52

photomicrograph, B4:31-32, 39-40

relative abundance, A3:104

selvage, B10:13-14

textures, B4:8-9

vs. depth, B6:31; B10:46-51

See also gabbro

orthopyroxene magnesium number

vs. clinopyroxene magnesium number, B10:43

vs. forsterite, B10:43

outcrops, maps, A1:48

overpressure, lower oceanic crust, B(synthesis):22-23

overprinting

fabric, A3:58, 65

lithologic units, A3:19

magnetic intensity, A3:74-75

oxide-olivine gabbro

chemical composition, B3:2-13

clinopyroxene, B10:11-12

differentiation, B10:16-21

olivine, B10:14

plagioclase, B10:9-11

oxide-olivine microgabbro, chemical composition, B3:2-13

oxide diorite, chemical composition, B3:2-13

oxide gabbro

abundance and composition, A3:258-259

chemical composition, A1:70; B3:2-13; B8:13-14; B12:3-5

chemical stratigraphy, B(synthesis):39-43

clinopyroxene, B10:11-12

deformation, B11:18-20

differentiation, B(synthesis):23-24

Formation Microscanner imaging, A3:238-239

lithologic units, A3:14-15; B(synthesis):7-11; B6:4, 11-12

magnetic susceptibility, B11:12-13, 45, 47-49, 51, 54

melts, B8:8-9; B10:22

olivine, B10:14

petrology, A1:12-14; A3:31-33

plagioclase, B10:9-11

relationship to deformation, B11:18-20

relationship to felsic veins, B11:17

See also oxide microgabbro; oxide-olivine gabbro

oxide gabbro, porphyroblastic, magnetic susceptibility, B11:61

oxide gabbronorite

lithologic units, A3:14; B6:5, 12-13

magnetic susceptibility, B11:11-12

oxide microgabbro, petrography, B6:11-12

oxide troctolite, chemical composition, B3:2-13

oxides

crystal-plastic deformation, A3:67, 210

gabbroic rocks, B6:16-18

high-temperature minerals, A3:35

igneous rocks, A1:11; A3:260

lithologic units, A3:22-23, 124

magnetic susceptibility, B11:17

photograph, A3:148

photomicrograph, A3:128

scan, A3:123

thin sections, A3:23-28

veins, A3:29

vs. depth, A3:122, 126

vs. gabbro magnetic susceptibility, B11:20-29

vs. titanium oxide, A3:119

See also hematite; iron-titanium oxide; magnetite

oxygen isotopes, phyllosilicates, B1:5-6

oxyhydroxides, low-temperature minerals, A3:38

P

paleomagnetism, Site 735, A1:22-23; A3:69-77

paragenesis, sulfides, B7:5-9

pargasite, geochemistry, B4:11, 20

pegmatite

lithologic units, A3:14

olivine gabbro, A1:12

pentlandite

gabbroic rocks, B7:5-9

photomicrograph, B7:15, 23

textures, A3:27

peridotite, serpentinized

dredge hauls, B(narrative):18

tectonics, A1:6-8

petrogenesis, gabbroic rocks, B8:5-14

petrography

high-temperature microscopic veins, B4:6-9

lithologic units, A3:17-21; B6:7-14

sulfides, B7:4-5, 24-25

veins, B9:3-8

phase equilibria

gabbro, B8:5-14

modal composition, A3:18

petrology, A1:14

phenocrysts, lower oceanic crust, B(synthesis):18-22, 39

phlogopite

alteration, B1:4-5

chemical composition, B1:10

veins, B9:11

phosphorus, gabbroic rocks, B8:3-4

phosphorus oxide

gabbro, B3:4

gabbroic rocks, B6:18; B8:4-14

vs. depth, B(synthesis):60; B6:45

zircon, B9:13-14

photoelectric effect logs, vs. depth, A3:233-234

phyllosilicates

alteration, B1:4-5

chemical composition, B1:10

electron microprobe data, B1:15-22

physical properties, Site 735, A1:24-25; A3:77-81, 302; B2:1-19

pigeonite, gabbro, B10:13-14

plagioclase

alteration, A1:14; A3:40-41; B4:7-8; B6:3-7

alteration vs. depth, A3:136

composition vs. depth, B(synthesis):52, 61

downhole variations, B6:13-14

gabbro, B(synthesis):40; B6:74-78; B8:3-14; B10:9-11

geochemistry, B3:3-5; B8:36-42; B10:56

grain size, A3:16-17, 113

grain size vs. depth, A3:114

high-temperature microscopic veins, B4:25-26

high-temperature minerals, A3:35

igneous rocks, A1:11

intrusions, B10:18-19

lithologic units, B6:3-14

magmatic structures, A3:60

mineral chemistry, B10:15, 32-34

mineral inclusions, A3:20

mineral texture, A3:19

modal composition, A3:18

modal percent vs. modal percent clinopyroxene, A3:115

olivine gabbro, B4:6-7

olivine gabbro analysis, B4:46-47

photograph, A1:61; B4:23-24

photomicrograph, A3:118, 127-130, 190-191, 206-207; B4:28-30, 39-40; B9:63

relative abundance, A3:103-104

scan, A3:125

sulfides, B7:5

textures, A3:63

veins, A3:41-43; B9:3-6, 8-9, 17-19, 29

vs. depth, B6:33; B10:45-52

vs. ferromagnesians, B10:15

vs. gabbro magnetic susceptibility, B11:22-23

zoning, B9:17; B10:10

See also albite; anorthite; augite/plagioclase ratio; quartz-plagioclase; quartz-plagioclase, granophyric; veins

plagioclase, altered, alteration vs. depth, A3:141

plagioclase, neoblastic, metagabbro, B6:3, 12

plagioclase, secondary

alteration vs. depth, A3:141

photograph, A3:161

vs. depth, A3:135

plastic deformation, magnetic susceptibility, B11:16

platinum group, gabbroic rocks, B7:1-29

plutons

chemical stratigraphy, B(synthesis):14-17

ferrobasalt, B(synthesis):53

lower oceanic crust, B(synthesis):20-22; B11:28-29

poikilitic texture

lithologic units, A3:19; B6:4

olivine gabbro, B4:6-7

porosity

chemical stratigraphy, B(synthesis):14-17

downhole measurements, B5:9-10

igneous rocks, B2:2-3, 7-11

oceanic crust, B5:13

vs. compressional wave velocity, B2:12; B5:28

vs. shear wave velocity, B5:28

porosity logs

electrofacies, A3:247-251

vs. depth, A3:233-235; B5:26

porphyroblastic texture, lithologic units, A3:18-19

porphyroclastic texture

deformation, B11:18-20, 61, 63

lithologic units, B6:3, 8

microscopic vs. macroscopic observations, A3:64-65

porphyroclasts

photomicrograph, A3:190-191, 207

scan, A3:123

potassium

alteration, A3:51

amphibole, B4:11

See also sodium+potassiumhornblende, B10:14

potassium feldspar, alteration, B1:5

potassium oxide

gabbroic rocks, B6:18; B4-14

mica, B9:11

plagioclase, B9:8

veins, B9:15

vs. depth, B6:44

vs. magnesium number, B10:41

preferred orientation, igneous layering, A3:29-30

prehnite

alteration vs. depth, A3:138

chemical composition, B9:53

electron microprobe data, B1:23-24

magmatic structures, A3:60

moderate-temperature minerals, A3:37

veins, A3:44-45; B9:6-7, 12

See also veins

prehnite, vein-forming, X-ray diffraction data, A3:144

pressure-temperature conditions

crystallization, B8:5-14

hydrothermal alteration, B1:5-6

protoliths, lithologic units, B6:3, 8

pumpellyite, vein-forming, X-ray diffraction data, A3:144

pyrite

gabbroic rocks, B7:5-9

low-temperature minerals, A3:38

moderate-temperature minerals, A3:37

pyroxene

composition, B10:36-38

downhole variations, B6:13-14

sulfides, B7:5

See also augite; clinopyroxene; diopside; enstatite; ferrosilite; orthopyroxene

pyrrhotite

gabbroic rocks, B7:5-9

low-temperature minerals, A3:38

moderate-temperature minerals, A3:37

photomicrograph, A3:128; B7:15-16, 23

Q

quartz

alteration vs. depth, A3:138

chemical composition, B9:51

mineral texture, A3:19

moderate-temperature minerals, A3:36

veins, A3:45; B9:3-4, 7-8, 11-12

quartz-microcline, lithologic units, A3:21

quartz-plagioclase, granophyric, lithologic units, A3:21

quench effect, microgabbro, B8:10

R

rare earths

gabbroic rocks, B6:19-20

vs. depth, A3:53, 178

rare earths, chondrite-normalized, gabbroic rocks, B6:59

reaction textures, lithologic units, A3:21

recrystallization

downhole distribution, A3:33-34

gabbro, A1:14-16; B6:6-7

lithologic units, A3:19

microstructures, A3:63-64

photomicrograph, A3:207

remanent magnetization, natural

average declination, A3:216

gabbro, A1:22-23; A3:71-77

logarithm distribution, A3:219

vs. depth, A3:218

remanent magnetization, thermal, vs. depth, A1:67

resistivity

electrofacies, A3:246-251, 313

igneous rocks, A3:81

resistivity logs

Site 735, A3:90-92

vs. depth, A3:234-235

retrograde foliation. See foliation, retrograde

reverse faults, photograph, A1:66

rifting

cross sections, A1:49-50

lower oceanic crust, B(synthesis):18-23; B9:22

rock textures, lithologic units, A3:18-19

rubidium

alteration, A3:51

gabbroic rocks, B6:16; B8:4-14

S

samarium

gabbroic rocks, B6:19

vs. depth, B6:57

saponite, chemical composition, B1:10

saponite, vein-forming, X-ray diffraction data, A3:163

scandium

gabbro, B3:3-5; B8:4-14; B12:4

vs. aluminum oxide, B8:23

vs. calcium oxide, B8:23

vs. calcium oxide/aluminum oxide ratio, B8:23

vs. clinopyroxene number, B8:23

vs. nickel, B3:11

vs. sodium number, B3:11

vs. strontium, B3:11

vs. titanium oxide, B12:12

See also vanadium/scandium ratio

scolecite, vein-forming, X-ray diffraction data, A3:145

sea-floor spreading, magmatic-hydrothermal transition, B4:1-56

secondary minerals

alteration, A3:34-38

vs. depth, A1:57

seismic Layer 3, structure, A1:3; B5:3-4

seismic reflection, seismic Layer 3, B5:3-4

seismic reflectors, vertical incidence profiles, A1:25

seismic thickness, crust, A1:8

selvage, orthopyroxene, B10:13-14

semi-brittle deformation, magmatic structures, A3:61

semi-brittle microstructures, photomicrograph, A3:190-191

serpentine

alteration, B1:4-5

chemical composition, B1:10

octahedral cation total vs. interlayer cations, B1:12

shear wave velocity

caliper logs, B5:41

crust, B5:8

data summary, B5:42-69

downhole measurements, B5:10-12

igneous rocks, B2:2-4, 7-11, 19

oceanic crust, B5:14-15

synthetic seismograms, B5:34-35

vs. bulk density, B5:29

vs. compressional wave velocity, B2:14

vs. depth, B5:27

vs. porosity, B5:28

shear zones

alteration, A3:38

discontinuities, B10:18-21

igneous contacts, A3:55-58

magnetic susceptibility, B11:53

magnetite, A3:23

oceanic crust, B5:14-15; B8:12; B9:21-22

photograph, A3:187

photomicrograph, A3:190-191

shear zones, retrograde, gabbro, A1:18-22

shear zones, reverse, photograph, A3:192

sheared contacts, lithologic units, A3:15-16

silica

apatite, B9:13

epidote, B9:12

gabbroic rocks, B6:16; B8:4-14

magmatic structures, A3:60

mica, B9:11

natrolite, B9:13

thomsonite, B9:13

veins, B9:15

vs. depth, B(synthesis):60; B6:34

vs. gabbro magnetic susceptibility, B11:20

vs. liquidus temperature, B8:21

silicate melts, high-temperature microscopic veins, B4:12-13

silicates

mineral chemistry, B10:1-60

modal composition, A3:17-18

See also calc-silicates

silicates, mafic, mineral chemistry, B10:15

silicon

gabbroic rocks, B8:3-4

veins, B9:16, 33-34

vs. iron ratio, B4:20, 42

Site 735, A1:1-26; A3:1-314

coring summary, A3:252-253

downhole measurements, A1:25-26; A3:81-96

fluid flow, B4:1-56

geochemistry, A1:16-18; A3:21-22, 47-55; B3:1-13; B12:1-18

igneous petrology, A1:11-14; A3:12-33

lithology, B6:1-82

magnetic susceptibility, B11:1-69

metamorphic petrology, A1:14-16; A3:33-47

mineral chemistry, B8:1-60

narrative history, B(narrative):1-20

operations, A3:1-11, 254-255

paleomagnetism, A1:22-23; A3:69-77

physical properties, A1:24-25; A3:77-81; B2:1-19

silicates, B10:1-60

site description, A1:1-26; A3:1-255

structural geology, A1:18-22; A3:54-69

sulfides, B7:1-29

veins, B9:1-66

Skaergaard Intrusion, petrology, B10:26

slickensides, magmatic structures, A3:60

smectite

alteration, A1:16; A3:138; B1:4-5; B6:3-7

alteration vs. depth, A3:139, 141

chemical composition, B1:10

interlayer cation contents, B1:11

low-temperature minerals, A3:37

octahedral cation total vs. interlayer cations, B1:12

photograph, A3:146

photomicrograph, B9:66

veins, A3:44; B9:6-7, 14

See also chlorite/smectite composition; veins

smectite, secondary, vs. depth, A3:135

smectite, vein-forming, X-ray diffraction data, A3:144, 163

sodium

amphibole, B4:11

clinopyroxene, B10:12

gabbroic rocks, B8:3-4

orthopyroxene, B10:14

veins, B9:34-35

sodium+potassium, vs. aluminum, B4:11, 20, 37, 41

sodium number

igneous rocks, B3:3-5

vs. calcium number, B3:8

vs. depth, B3:9

vs. magnesium number, B3:8

vs. scandium, B3:11

vs. titanium oxide, B3:10

vs. vanadium/scandium ratio, B3:10

sodium oxide

apatite, B9:13

gabbroic rocks, B6:18; B8:4-14

igneous rocks, A1:17-18

natrolite, B9:13

thomsonite, B9:13

vs. depth, B6:43

vs. magnesium number, B10:39, 41

See also calcium oxide/sodium oxide ratio

solid solution, melts, B8:8-9

sonic logs, A3:89

sphalerite, gabbroic rocks, B7:5-7

spinel. See chrome-spinel; ulvospinel

spreading ridges

lower oceanic crust, B(synthesis):18-22, 25-26; B10:25-27

magma chambers, B(synthesis):4-6

shear zones, A1:5

structure, B(narrative):9-11

stratigraphy, intrusions, B10:20-21

stress, microstructures, A3:64

strontium

gabbro, A3:51; B3:4; B6:19; B8:4-14

veins, B9:16

vs. aluminum oxide/magnesium oxide ratio, A3:51, 173

vs. clinopyroxene number, B8:26

vs. depth, B6:56; B8:12-13, 27, 29-30

vs. magnesium number, B8:26

vs. scandium, B3:11

strontium/aluminum ratio, vs. anorthite/(anorthite+albite) ratio, A3:51, 174

strontium isotopes, phyllosilicates, B1:6

structural geology, Site 735, A1:18-22; A3:54-69

structures

gabbro, B(synthesis):25-26; B11:28-29

spreadsheets, A1:39-43

stereoplots, A1:64-65

See also microstructures

subophitic texture, lithologic units, A3:15

sulfides

alteration, B6:4

alteration vs. depth, A3:138

gabbroic rocks, B7:1-29

low-temperature minerals, A3:38

mineral chemistry, B7:4-9, 26

mineral inclusions, A3:21

modal composition, A3:18

moderate-temperature minerals, A3:37

olivine gabbro, B4:6-7

petrography, B7:4-7, 24-25

photomicrograph, A3:128

thin sections, A3:23-28

vs. gabbro magnetic susceptibility, B11:20-29

See also chalcopyrite; marcasite; pentlandite; pyrite; pyrrhotite

sulfur

gabbroic rocks, B6:18

vs. depth, B(synthesis):64; B6:48

sutured contacts, lithologic units, A3:15-16

symplectite, photomicrograph, A3:129

synthetic seismograms

core-log integration, B5:12-13

depth vs. time, B5:34-35

well-logs, B5:38

T

talc

alteration, B1:4-5; B6:9

alteration vs. depth, A3:139

chemical composition, B1:10

high-temperature minerals, A3:35

lithologic units, B6:3

octahedral cation total vs. interlayer cations, B1:12

tectonic contacts

lithologic units, A3:15-16

magmatic structures, A3:56

tectonic controls, late-stage melt migration, B10:22

tectonics

cross sections, A1:49-50

transform faults, A1:6-8

temperature

crystallization, B4:11-12, 38, 56

logging, A3:88

for pyroxenes and amphibole-plagioclase, B4:38

veins, B9:17-19, 37

vs. depth, B4:22

vs. magnesium number, B8:19

textures

gabbro, A3:109

lithologic units, A3:18-21; B6:7-14

microstructures, A3:63

photomicrograph, A3:205-207

See also chadacrysts; crescumulate texture; exsolution textures; intergranular textures; intergrowths; mineral textures; mylonitic texture; myrmekitic texture; oikocrysts; ophitic texture; poikilitic texture; porphyroblastic texture; porphyroclastic texture; reaction textures; subophitic texture; ultramylonitic texture

textures, high-temperature, petrography, B4:6-9

thermal boundary layer, lower crust, B8:8

thermal conductivity

igneous rocks, A3:80, 303-306

vs. depth, A3:230

tholeiite, gabbroic rocks, B8:5-14

thompsonite, alteration, B1:5

thomsonite, veins, B9:13

titanite

chemical composition, B9:57

mineral texture, A3:19

moderate-temperature minerals, A3:36

photograph, A3:153

thin sections, A3:24-25

veins, B9:14

titanium

clinopyroxene, B4:10; B10:12

gabbroic rocks, B8:3-4

high-temperature microscopic veins, B4:12-13

hornblende, B10:14

hydrothermal alteration, A3:25-26

orthopyroxene, B10:14

vs. aluminum, B4:37

See also gabbro

titanium/zirconium ratio, olivine gabbro, B3:5

titanium oxide

amphibole, B9:9-10

biotite, B9:11

chemical stratigraphy, A3:51-53; B(synthesis):16, 34-45

clinopyroxene, B4:10

differentiation, B10:16-21

diopside, B9:10

gabbro, A3:53; B3:3-4; B8:4-14; B12:3-4

hornblende, B10:14

igneous rocks, A1:17-18

ilmenite, B9:13

mica, B9:11

orthopyroxene, B4:10

phlogopite, B9:11

veins, B9:15; B11:15

vs. aluminum oxide, B4:34-35

vs. anorthite/(anorthite+albite) ratio, A3:49, 167

vs. calcium number, A3:21, 121

vs. calcium oxide, B4:35

vs. clinopyroxene number, B8:25

vs. depth, A3:52, 177; B(synthesis):51, 60; B6:36; B8:12-13, 27, 29-30

vs. gabbro magnetic susceptibility, B11:20, 21, 26-27, 29

vs. iron oxide, B12:9

vs. liquidus temperature, B8:21

vs. magnesium number, B4:34; B8:25; B10:39, 41; B11:64

vs. magnetic susceptibility, B11:65

vs. modal oxide abundance, A3:21

vs. nickel, B12:10

vs. oxides, A3:119

vs. scandium, B12:12

vs. sodium number, B3:10

vs. vanadium, A3:50, 171-172; B12:11

vs. zirconium, B3:7

See also iron oxide/titanium oxide ratio

titanium oxide, log weight percent, vs. depth, A1:63

titanophile elements

ferrogabbro, B12:13

See also vanadium; yttrium; zirconium

tonalite

petrology, A1:13-14

veins, B8:9-10

trace elements

gabbroic rocks, B3:1-13; B6:18-19, 81; B8:3-5, 54-59; B12:1-18

igneous rocks, A1:17-18

veins, B9:60-61

vs. depth, A3:53, 178

transform faults

structure, B(narrative):9-11

tectonics, A1:6-8

tremolite, geochemistry, B4:20

troctolite

abundance and composition, A3:256-259

chemical composition, A1:70; B3:2-13; B8:13-14

chemical stratigraphy, B(synthesis):38-45

clinopyroxene, B10:11-12

lithologic units, A3:13-14; B(synthesis):11; B6:5, 9-10

magnetic susceptibility, B11:8, 15, 29, 52

petrology, A1:12-14

photograph, A1:56

photomicrograph, A3:127, 129

plagioclase, B10:9-11

shear zones, A1:4-5, 8-10

See also gabbro; microgabbro; oxide troctolite

troilite

gabbroic rocks, B7:5-9

photomicrograph, B7:15-16

trondhjemite

age, A1:7-8

petrology, A1:13-14

veins, B8:9-10

See also gabbro

U

ultramylonite, magnetic susceptibility, B11:18-20, 63

ultramylonitic texture, photomicrograph, A3:207

ulvospinel, thin sections, A3:24-25

uplifts

cross sections, A1:49-50

lower oceanic crust, B(synthesis):20-22; B9:22

oceanic crust, B1:1-24

V

vanadium

ferrogabbro, B12:13

gabbroic rocks, B6:18-19; B8:4-14; B12:4-5, 14

vs. clinopyroxene number, B8:25

vs. depth, B6:49

vs. magnesium number, B8:25

vs. titanium oxide, A3:50, 171-172; B12:11

vanadium/scandium ratio

gabbro, B3:3-5

vs. sodium number, B3:10

vein abundance, vs. hydrothermal alteration, A3:137

vein intensity, vs. depth, A1:64; A3:200

vein nets, magnetic susceptibility, B11:15-16, 55

vein number

vs. depth, B11:59

vs. magnetic susceptibility, B11:57

veins

abundance as volume percent of core, B1:9

alteration, B1:3-6; B6:6

amphibole, A1:15

dip, A3:244

dip vs. depth, A3:201-203

geochemistry, B9:60-61

isotopes, B1:14

mineral texture, A3:19

orientation, A3:61

origin and models, B9:19-22

petrography, B9:3-8

spreadsheets, A1:38

temperature, B9:17-19

types, A3:267; B9:27, 38

vs. depth, A1:58; A3:149; B9:28

X-ray diffraction data, A3:144-145

zeolite and prehnite, A1:16

veins, amphibole

abundance as volume percent of core, B1:9

chemical composition, B9:43

crystal-plastic deformation, A3:67, 212

dip vs. depth, A3:201

petrography, B9:4-5

photograph, A1:60; A3:158-161, 164, 189

photomicrograph, A3:194

proportion vs. total veins, A3:150

Site 735, A3:43

vs. depth, A1:58; A3:149, 211

veins, breccia, magnetic susceptibility, B11:15-16

veins, calcite, A3:43

veins, carbonate

abundance as volume percent of core, B1:9

dip vs. depth, A3:202

petrography, B9:7

petrology, A3:43; B1:4

photograph, A3:162

proportion vs. total veins, A3:150

vs. depth, A1:58; B9:28

veins, chlorite

abundance as volume percent of core, B1:9

petrography, B9:7-8

photograph, A3:164

vs. depth, A1:58; A3:149; B9:28

veins, chlorite/smectite

abundance as volume percent of core, B1:9

petrology, B1:4

veins, diopside

petrography, B9:6

proportion vs. total veins, A3:150

titanite photograph, A3:153

vs. depth, A3:149; B9:28

veins, diopside + amphibole, A3:42-43

veins, dioritic, photograph, A3:154

veins, epidote

petrography, B9:7-8

photograph, A3:165

veins, felsic

alteration photograph, A3:151-152

chemical composition, B8:13-14; B9:33

deformation, B11:18-20

gabbroic rocks, B8:7

intensity vs. depth, A3:131

lithologic units, A3:21, 28-29, 41-42; B(synthesis):10-11

magmatic structures, A3:59

magnetic susceptibility, A3:226; B11:11-15, 48, 50-51

origin, B8:9-10

petrography, B9:3-4

photograph, A1:59; A3:132

photomicrograph, A3:194; B9:62-63

plagioclase, B10:9-11

proportion vs. total veins, A3:150

relationship to oxide gabbro, B11:17

vs. depth, A3:149; B9:28

zoning photograph, A3:152

veins, high-temperature microscopic

occurrence, B4:25, 43-44

origin, B4:12-13

petrography, B4:6-9

photomicrograph, B4:28-30, 39-40

vs. depth, B4:22

veins, hydrothermal, alteration, A3:41-45

veins, igneous and hydrothermal, composition and origin, B9:1-66

veins, magmatic

alteration, A3:41-45

dip vs. depth, A3:201

veins, olivine gabbro, photograph, A1:54

veins, plagioclase

composition, A3:42; B9:35-36

petrography, B9:3-4

proportion vs. total veins, A3:150

vs. depth, A3:149

veins, plagioclase + amphibole

formation, A3:42; B9:18-19, 37

petrography, B9:5

photograph, A3:155-156

photomicrograph, B9:62-64

proportion vs. total veins, A3:150

vs. depth, A1:58; A3:149; B9:28

veins, plagioclase + diopside

chemical composition, B9:34

petrography, B9:6, 18-19

photograph, A1:59; A3:157

photomicrograph, B9:62, 64

Site 735, A3:42-43

vs. depth, A1:58; B9:28

veins, plagioclase + quartz, photomicrograph, B9:62

veins, prehnite, petrology, A3:44-45; B1:4

veins, quartz, petrography, B9:7-8

veins, smectite

abundance as volume percent of core, B1:9

dip vs. depth, A3:202

petrology, A3:44; B1:4

photograph, A1:61; A3:146, 160, 164

proportion vs. total veins, A3:150

vs. depth, A1:58; A3:149; B9:28

veins, smectite + prehnite + carbonate, petrography, B9:6-7

veins, zeolite

dip vs. depth, A3:202

petrology, A3:44-45; B1:4

vs. depth, A1:58; A3:149; B9:28

veins, zeolite + prehnite, abundance as volume percent of core, B1:9

veins, zeolite + prehnite + carbonate, petrography, B9:7

velocity

attenuation, B2:3-4, 15-17

oceanic crust, B5:14-15

structure, A1:51

vs. depth, A1:69

See also anisotropy; attenuation; compressional wave velocity; shear wave velocity

velocity logs

Site 735, A3:84-87

vs. depth, A3:236; B5:26

velocity structure, lower oceanic crust, B5:1-71

vertical incidence profiles, seismic reflectors, A1:25

volatiles, chemical composition, A3:281

vugs, photograph, A3:162

W

water content

gabbroic rocks, B6:18

volatiles, A3:281

vs. depth, B6:46

well-logs

compressional wave velocity, B5:36-37

fractures, A3:245

synthetic seismograms, B5:38

See also core-log integration

wollastonite

chemical composition, B4:9-10

gabbro, B10:13-14

X

X-ray diffraction data, modal composition, B6:62-63

xenoliths, core photograph, A3:195

Y

ytterbium

vs. lanthanum/ytterbium ratio, B6:60

See also lanthanum/ytterbium ratio

yttrium

ferrogabbro, B12:13

gabbro, A3:50; B8:4-14; B12:4, 14

gabbroic rocks, B6:19

veins, B9:16

vs. clinopyroxene number, B8:26

vs. depth, A3:53, 178; B(synthesis):62; B6:54; B8:12-13, 27, 29-30

vs. magnesium number, B8:26

Z

zeolites

alteration vs. depth, A3:138

chemical composition, B9:55

electron microprobe data, B1:23-24

moderate-temperature minerals, A3:37

veins, A3:44-45; B9:13

See also veins

zeolites, vein-forming, X-ray diffraction data, A3:145

zinc

gabbroic rocks, B6:19; B8:4-14

sulfides, B7:6-9

veins, B9:16

vs. depth, B6:52; B8:12-13, 27, 29-30

vs. iron oxide, A3:49, 170

zircon

chemical composition, B9:56

veins, B9:13-14

zirconium

ferrogabbro, B12:13

gabbro, A3:50; B3:4-5; B6:19; B8:4-14; B12:4-5, 14

veins, B9:16; B11:15

vs. clinopyroxene number, B8:26

vs. depth, B(synthesis):63; B6:55; B8:12-13, 27, 29-30

vs. magnesium number, B8:26

vs. niobium, B3:7

vs. titanium oxide, B3:7

See also titanium/zirconium ratio

zirconium/niobium ratio, gabbro, B3:5

Zone 3a, olivine gabbro, B(synthesis):41-42

Zone 3b, olivine gabbro, B(synthesis):42-43

Zone 3c, olivine gabbro, B(synthesis):43

zoning

chemical stratigraphy, B(synthesis):17

clinopyroxene, B10:12

plagioclase, B9:17; B10:10