Table T2.

Table T2. Results of index properties measurements performed on 72 samples from cores recovered from Holes 856H, 1035D, 1035E, 1035F, 1035H, 1037B, and 1038I during Leg 169.

Core, section,
interval (cm) Piece
number Lithologic
subunit Orientation Water content (%) Wet bulk
density
(g/cm³) Grain
density
(g/cm³) Porosity
(%) Sample description

Middle Valley, Juan de Fuca Ridge

169-856H-

21R-1, 34-36
4A
VIA
h
3.18
3.85
4.22
11.6
Sulfide-veined, altered siltstone

21R-2, 65-67
10
VIA
h
4.92
2.61
2.83
11.9
Siltstone with minor veins and disseminated sulfide

22R-2, 124-130
15
VIA
v
1.36
3.23
3.33
4.2
Sulfide-veined siltstone and silty claystone; large sulfide vein with disseminated pyrrhotite, chalcopyrite

23R-2, 62-64
9
VIA
h
5.49
2.52
2.75
12.8
Sulfide-veined, altered mudstone

25R-01, 19-21

VIA
h
2.26
3.97
4.25
8.6
Sulfide-veined siltstone and mudstone with anhydrite vein

25R-2, 62-64

VIA
h
23.26
2.13
2.87
39.2
Laminated siltstone

26R-1, 91-93

VIB
h
12.23
2.37
2.84
25.2
Silty claystone with small sulfide blebs

28R-1, 28-30

VIB
h
19.77
2.19
2.85
35.3
Broken; siltstone with minor sulfide blebs

29R-1, 55-57
9
VIB
h
18.44
2.20
2.80
33.4
Silicified, indurated, laminated siltstone with pyrrhotite/quartz in thin veins and vugs

30R-1, 43-45
8
VIB
h
7.00
2.47
2.75
15.8
Siltstone to fine sandstone with disseminated sulfide

31R-1, 9-11
2
VIC
h
10.40
2.85
3.51
26.2
Sulfide-banded fine-grained sandstone to siltstone

31R-1, 74-79
10
VIC
v
7.45
2.95
3.44
19.9
Sulfide-banded fine-grained sandstone to siltstone

31R-2, 74-76
10
VIC
h
3.72
3.38
3.70
11.8
Sulfide-banded sandstone to siltstone

32R-1, 53-55
9A
IIA
h
3.84
2.63
2.80
9.5
Indurated sandstone to siltstone; trace sulfide in silicified laminae and quartz veinlets

35R-1, 42-44
8
IIA
h
12.63
2.34
2.81
25.7
Broken; clayey siltstone with minor disseminated sulfide

39R-1, 69-71
8
IID
h
8.91
2.44
2.79
19.5
Finely laminated, fine- to medium-grained sandstone with anhydrite veinlets

42R-1,101-103
14
IIA
h
15.40
2.27
2.81
29.6
Laminated, interbedded siltstone and silty claystone with minor quartz, anhydrite veins

43R-1, 122-124
12
IIA
h
13.74
2.30
2.78
27.1
Siltstone to fine sandstone (fine turbidite sequence)

45R-1, 16-18
3
IIA
h
11.09
2.37
2.78
23.1
Siltstone to fine sandstone (thin-bedded turbidite)

47R-1, 118-120
15
IIA
h
8.74
2.43
2.77
19.1
Sandstone with thinly bedded turbidite

48R-1, 36-38
7
IIA
h
15.04
2.29
2.83
29.2
Finely laminated silty claystone

50R-1, 132-134
18
IIA
h
9.85
2.42
2.81
21.2
Finely laminated silty claystone

52R-1, 14-16
2
IIA
h
12.68
2.34
2.81
25.8
Laminated silty claystone

55R-1, 28-30
5A
VII
h
2.32
2.75
2.86
6.1
Fine-grained plagioclase-pyrite basalt with veins of chlorite and minor quartz, epidote, chalcopyrite

59R-1, 83-85
12
VII
h
8.81
2.58
2.99
20.4
Indurated silty claystone with veins of quartz-pyrrhotite-epidote-zeolite?; abuts basalt sill

60R-2,26-28
3
VII
h
1.76
2.86
2.96
4.8
Fine- to medium-grained basalt with up to 3-mm clinopyroxene phenocrysts; thin veins, fractures

62R-1, 72-74
13
VII
h
3.84
2.61
2.78
9.4
Laminated siltstone

64R-1, 91-93
15
VIII
h
8.16
2.50
2.85
18.4
Fine-grained altered pillow basalt with chlorite/quartz veins and blebs

65R-1, 28-30
4
VIII
h
3.51
2.73
2.90
9.0
Highly altered fine-grained basalt with two wide chlorite-haloed sulfide veins

65R-2, 75-77
9B
VIII
h
1.87
2.84
2.93
5.1
Highly altered fine-grained basalt with thin vein

169-1035D-

10X-1, 34-36
6
VA
h
5.52
3.31
3.78
16.9
Sulfide (semimassive and veins) with highly altered silty claystone

17X-1, 16-18
3
VIB
h
9.34
2.40
2.75
20.0
Medium-grained, faintly laminated, altered sandstone

20X-1, 81-83
10
IID
h
22.37
2.14
2.85
38.2
Hydrothermally altered siltstone with disseminated sulfide blebs

169-1035E-

2H-6, 22-24

IIA
h
81.01
1.56
2.76
68.0
Silty clay

4H-4, 48-49

IIA
h

Silty clay (disintegrated)

169-1035F-

4R-1, 70-72
7
VD
h
5.79
3.98
4.79
21.3
Vuggy, pyritic massive sulfide with anhydrite vug infill

5R-2,126-128
21
VD
h
3.41
4.27
4.79
13.8
Colloform and vuggy, pyritic massive sulfide with anhydrite infill

6R-1,16-18
3
VD
h
3.83
3.99
4.50
14.4
Colloform pyritic massive sulfide with anhydrite cavity infill

6R-1, 109-113
20
VD
v
5.37
4.00
4.75
19.9
Massive to spongy, recrystallized, colloform massive sulfide with anhydrite in cavities

8R-1,116-118
19
VD
h
2.75
3.77
4.07
9.8
Vuggy pyrite with clay infill; altered sediment clasts (?)

10R-1, 25-27

VIC
h
18.61
2.21
2.84
33.9
Pyrite, pyrrhotite and sphalerite interbanded with moderately indurated siltstone and sandstone

11R-1, 6-13
2
VIA
v
3.30
2.69
2.85
8.4
Altered, sulfide-veined silty claystone and siltstone; pyrrhotite/chalcopyrite veins and pyrrhotite blebs

11R-1, 20-23
3
VIA
h
3.060
2.73
2.88
7.9
Altered, sulfide-veined silty claystone and siltstone; pyrrhotite/chalcopyrite veins and pyrrhotite blebs

12R-1, 132-134
14
VIA
h
11.45
2.42
2.89
24.3
Fine-grained, altered sulfide-veined sandstone to siltstone; 15%-20% of core is pyrrhotite, chalcopyrite, sphalerite, anhydrite

13R-1, 63-65
1
VIB
h
17.49
2.25
2.87
32.7
Altered silty claystone with disseminated sulfide blebs

13R-2, 68-70
1
VIB
h
11.82
2.36
2.79
24.3
Fine- to medium-grained altered sandstone with sulfide (veins, disseminations)

14R-1, 74-80
1
VIB
h
19.95
2.18
2.84
35.4
Siltstone with sandstone interbeds and minor bed-parallel sulfide

17R-1, 56-58
9
VIB
h
23.33
2.11
2.82
38.9
Fine-grained, laminated, turbidite sandstone with disseminated sulfide

19R-1, 76-78
13
IIA
h
15.05
2.30
2.85
29.4
Fine- to medium-grained sandstone interbedded with siltstone laminae; minor (<1%) sulfide

22R-1, 63-75
8
IID
h
7.46
2.50
2.81
17.0
Altered, laminated silty claystone with disseminated sulfide and quartz

169-1035H-

2R-1, 50-53
8
VC
h
5.91
3.55
4.17
19.3
Sulfide breccia: irregular, pyrite-dominated clasts in fine-grained matrix

4R-1, 147-150

VIB
h
17.07
2.27
2.89
32.4
Turbiditic fine-grained sandstone with some silty claystone clasts and 2%-10% pyrite, sphalerite as veins, disseminations

6R-1, 62-64

VIB
h
23.40
2.10
2.81
38.9
Siltstone impregnated with pyrrhotite, few pyrite veins (sulfide 5% of core)

8R-1, 17-20
3
IIA
h
18.30
2.21
2.81
33.3
Laminated, very fine to fine-grained sandstone

11R-1, 7-10
2
VIB
h
15.98
2.28
2.85
30.6
Fine- to medium-grained laminated sandstone with slump folding

14R-1, 27-29
5
VIA
h
9.14
2.47
2.85
20.2
Locally laminated siltstone with pyrrhotite veins and veinlets, small blebs of soft zeolite?, clay?

16R-2, 109-111
17
VC
h
2.79
3.62
3.90
9.6
Partially oxidized, mottled, magnetite-rich massive sulfide

17R-3, 6-8
2
VC
h
25.00
2.47
3.86
48.3
Section 2: semimassive, variably silicified sulfide (pyrite, magnetite + sphalerite, pyrrhotite) amid clay-altered sediment

17R-4, 84-89
12
VC
v
3.74
3.96
4.44
13.9
Section 3: massive sulfide in high-grade sphalerite zone with 4%-40% sphalerite, wurtzite and up to 8% magnetite

20R-1, 69-72
16
VIB
h
5.29
2.66
2.90
13.0
Silicified sedimentary breccia with Cu-Fe sulfide in anhydrite molds

21R-1, 88-91
18
VIC
h
2.44
3.31
3.50
7.7
Altered, laminated siltstone with 50%-70% bedding-parallel sulfide

22R-1, 84-87
16
VIB
h
17.67
2.16
2.70
31.7
Interbedded silty claystone, siltstone and laminated fine-grained sandstone with <1% disseminated sulfide

23R-1, 110-113
18
VIB
h
19.88
2.17
2.81
35.2
Strongly altered, vuggy (silica, chlorite?) siltstone with minor silty claystone interbeds

24R-1, 135-138
19
VIB
h
14.70
2.32
2.86
29.0
Turbiditic siltstone and sandstone with <2% disseminated sulfide

25R-1, 120-123
19
IID
h
18.11
2.26
2.91
33.9
Highly distorted siltstone with silty claystone and fine-grained sandstone interbeds; rare sulfide

26R-2, 23-26
4
IID
h
12.45
2.38
2.86
25.7
Fine-grained sandstone, probably chlorite altered; no sulfide

27R-1, 102-105
14
IID
h
10.82
2.39
2.80
22.8
Altered turbiditic, laminated fine-grained sandstone interbedded with siltstone

27R-2, 26-29
3
IID
h
7.62
2.50
2.82
17.3
Laminated, bioturbated interbeds of silty claystone and siltstone

Escanaba Trough, Gorda Ridge

169-1037B-

58R-1, 105-108
7C
N/A
h
0.94
2.86
2.91
2.6
Altered fine-grained basalt with <1-mm-thick calcite + chlorite selvage vein

61R-1, 75-77
2
N/A
h
0.98
2.91
2.97
2.8
Fine- to medium-grained altered basalt; vesicles filled with smectite/chlorite

62R-1, 75-77
5B
N/A
h
1.18
2.93
2.99
3.3
Altered. medium-grained, plagioclase-phyric basalt with few thin chlorite/zeolite veins

169-1038I-

43X-3, 58-61
8
N/A
h
0.94
2.87
2.92
2.6
Massive, fine-grained, aphyric (flow?) basalt

Core, section, interval (cm)	Piece number	Lithologic subunit	Orientation	Water content (%)	Wet bulk density (g/cm³)	Grain density (g/cm³)	Porosity (%)	Sample description
Middle Valley, Juan de Fuca Ridge
169-856H-
21R-1, 34-36	4A	VIA	h	3.18	3.85	4.22	11.6	Sulfide-veined, altered siltstone
21R-2, 65-67	10	VIA	h	4.92	2.61	2.83	11.9	Siltstone with minor veins and disseminated sulfide
22R-2, 124-130	15	VIA	v	1.36	3.23	3.33	4.2	Sulfide-veined siltstone and silty claystone; large sulfide vein with disseminated pyrrhotite, chalcopyrite
23R-2, 62-64	9	VIA	h	5.49	2.52	2.75	12.8	Sulfide-veined, altered mudstone
25R-01, 19-21		VIA	h	2.26	3.97	4.25	8.6	Sulfide-veined siltstone and mudstone with anhydrite vein
25R-2, 62-64		VIA	h	23.26	2.13	2.87	39.2	Laminated siltstone
26R-1, 91-93		VIB	h	12.23	2.37	2.84	25.2	Silty claystone with small sulfide blebs
28R-1, 28-30		VIB	h	19.77	2.19	2.85	35.3	Broken; siltstone with minor sulfide blebs
29R-1, 55-57	9	VIB	h	18.44	2.20	2.80	33.4	Silicified, indurated, laminated siltstone with pyrrhotite/quartz in thin veins and vugs
30R-1, 43-45	8	VIB	h	7.00	2.47	2.75	15.8	Siltstone to fine sandstone with disseminated sulfide
31R-1, 9-11	2	VIC	h	10.40	2.85	3.51	26.2	Sulfide-banded fine-grained sandstone to siltstone
31R-1, 74-79	10	VIC	v	7.45	2.95	3.44	19.9	Sulfide-banded fine-grained sandstone to siltstone
31R-2, 74-76	10	VIC	h	3.72	3.38	3.70	11.8	Sulfide-banded sandstone to siltstone
32R-1, 53-55	9A	IIA	h	3.84	2.63	2.80	9.5	Indurated sandstone to siltstone; trace sulfide in silicified laminae and quartz veinlets
35R-1, 42-44	8	IIA	h	12.63	2.34	2.81	25.7	Broken; clayey siltstone with minor disseminated sulfide
39R-1, 69-71	8	IID	h	8.91	2.44	2.79	19.5	Finely laminated, fine- to medium-grained sandstone with anhydrite veinlets
42R-1,101-103	14	IIA	h	15.40	2.27	2.81	29.6	Laminated, interbedded siltstone and silty claystone with minor quartz, anhydrite veins
43R-1, 122-124	12	IIA	h	13.74	2.30	2.78	27.1	Siltstone to fine sandstone (fine turbidite sequence)
45R-1, 16-18	3	IIA	h	11.09	2.37	2.78	23.1	Siltstone to fine sandstone (thin-bedded turbidite)
47R-1, 118-120	15	IIA	h	8.74	2.43	2.77	19.1	Sandstone with thinly bedded turbidite
48R-1, 36-38	7	IIA	h	15.04	2.29	2.83	29.2	Finely laminated silty claystone
50R-1, 132-134	18	IIA	h	9.85	2.42	2.81	21.2	Finely laminated silty claystone
52R-1, 14-16	2	IIA	h	12.68	2.34	2.81	25.8	Laminated silty claystone
55R-1, 28-30	5A	VII	h	2.32	2.75	2.86	6.1	Fine-grained plagioclase-pyrite basalt with veins of chlorite and minor quartz, epidote, chalcopyrite
59R-1, 83-85	12	VII	h	8.81	2.58	2.99	20.4	Indurated silty claystone with veins of quartz-pyrrhotite-epidote-zeolite?; abuts basalt sill
60R-2,26-28	3	VII	h	1.76	2.86	2.96	4.8	Fine- to medium-grained basalt with up to 3-mm clinopyroxene phenocrysts; thin veins, fractures
62R-1, 72-74	13	VII	h	3.84	2.61	2.78	9.4	Laminated siltstone
64R-1, 91-93	15	VIII	h	8.16	2.50	2.85	18.4	Fine-grained altered pillow basalt with chlorite/quartz veins and blebs
65R-1, 28-30	4	VIII	h	3.51	2.73	2.90	9.0	Highly altered fine-grained basalt with two wide chlorite-haloed sulfide veins
65R-2, 75-77	9B	VIII	h	1.87	2.84	2.93	5.1	Highly altered fine-grained basalt with thin vein
169-1035D-
10X-1, 34-36	6	VA	h	5.52	3.31	3.78	16.9	Sulfide (semimassive and veins) with highly altered silty claystone
17X-1, 16-18	3	VIB	h	9.34	2.40	2.75	20.0	Medium-grained, faintly laminated, altered sandstone
20X-1, 81-83	10	IID	h	22.37	2.14	2.85	38.2	Hydrothermally altered siltstone with disseminated sulfide blebs
169-1035E-
2H-6, 22-24		IIA	h	81.01	1.56	2.76	68.0	Silty clay
4H-4, 48-49		IIA	h					Silty clay (disintegrated)
169-1035F-
4R-1, 70-72	7	VD	h	5.79	3.98	4.79	21.3	Vuggy, pyritic massive sulfide with anhydrite vug infill
5R-2,126-128	21	VD	h	3.41	4.27	4.79	13.8	Colloform and vuggy, pyritic massive sulfide with anhydrite infill
6R-1,16-18	3	VD	h	3.83	3.99	4.50	14.4	Colloform pyritic massive sulfide with anhydrite cavity infill
6R-1, 109-113	20	VD	v	5.37	4.00	4.75	19.9	Massive to spongy, recrystallized, colloform massive sulfide with anhydrite in cavities
8R-1,116-118	19	VD	h	2.75	3.77	4.07	9.8	Vuggy pyrite with clay infill; altered sediment clasts (?)
10R-1, 25-27		VIC	h	18.61	2.21	2.84	33.9	Pyrite, pyrrhotite and sphalerite interbanded with moderately indurated siltstone and sandstone
11R-1, 6-13	2	VIA	v	3.30	2.69	2.85	8.4	Altered, sulfide-veined silty claystone and siltstone; pyrrhotite/chalcopyrite veins and pyrrhotite blebs
11R-1, 20-23	3	VIA	h	3.060	2.73	2.88	7.9	Altered, sulfide-veined silty claystone and siltstone; pyrrhotite/chalcopyrite veins and pyrrhotite blebs
12R-1, 132-134	14	VIA	h	11.45	2.42	2.89	24.3	Fine-grained, altered sulfide-veined sandstone to siltstone; 15%-20% of core is pyrrhotite, chalcopyrite, sphalerite, anhydrite
13R-1, 63-65	1	VIB	h	17.49	2.25	2.87	32.7	Altered silty claystone with disseminated sulfide blebs
13R-2, 68-70	1	VIB	h	11.82	2.36	2.79	24.3	Fine- to medium-grained altered sandstone with sulfide (veins, disseminations)
14R-1, 74-80	1	VIB	h	19.95	2.18	2.84	35.4	Siltstone with sandstone interbeds and minor bed-parallel sulfide
17R-1, 56-58	9	VIB	h	23.33	2.11	2.82	38.9	Fine-grained, laminated, turbidite sandstone with disseminated sulfide
19R-1, 76-78	13	IIA	h	15.05	2.30	2.85	29.4	Fine- to medium-grained sandstone interbedded with siltstone laminae; minor (<1%) sulfide
22R-1, 63-75	8	IID	h	7.46	2.50	2.81	17.0	Altered, laminated silty claystone with disseminated sulfide and quartz
169-1035H-
2R-1, 50-53	8	VC	h	5.91	3.55	4.17	19.3	Sulfide breccia: irregular, pyrite-dominated clasts in fine-grained matrix
4R-1, 147-150		VIB	h	17.07	2.27	2.89	32.4	Turbiditic fine-grained sandstone with some silty claystone clasts and 2%-10% pyrite, sphalerite as veins, disseminations
6R-1, 62-64		VIB	h	23.40	2.10	2.81	38.9	Siltstone impregnated with pyrrhotite, few pyrite veins (sulfide 5% of core)
8R-1, 17-20	3	IIA	h	18.30	2.21	2.81	33.3	Laminated, very fine to fine-grained sandstone
11R-1, 7-10	2	VIB	h	15.98	2.28	2.85	30.6	Fine- to medium-grained laminated sandstone with slump folding
14R-1, 27-29	5	VIA	h	9.14	2.47	2.85	20.2	Locally laminated siltstone with pyrrhotite veins and veinlets, small blebs of soft zeolite?, clay?
16R-2, 109-111	17	VC	h	2.79	3.62	3.90	9.6	Partially oxidized, mottled, magnetite-rich massive sulfide
17R-3, 6-8	2	VC	h	25.00	2.47	3.86	48.3	Section 2: semimassive, variably silicified sulfide (pyrite, magnetite + sphalerite, pyrrhotite) amid clay-altered sediment
17R-4, 84-89	12	VC	v	3.74	3.96	4.44	13.9	Section 3: massive sulfide in high-grade sphalerite zone with 4%-40% sphalerite, wurtzite and up to 8% magnetite
20R-1, 69-72	16	VIB	h	5.29	2.66	2.90	13.0	Silicified sedimentary breccia with Cu-Fe sulfide in anhydrite molds
21R-1, 88-91	18	VIC	h	2.44	3.31	3.50	7.7	Altered, laminated siltstone with 50%-70% bedding-parallel sulfide
22R-1, 84-87	16	VIB	h	17.67	2.16	2.70	31.7	Interbedded silty claystone, siltstone and laminated fine-grained sandstone with <1% disseminated sulfide
23R-1, 110-113	18	VIB	h	19.88	2.17	2.81	35.2	Strongly altered, vuggy (silica, chlorite?) siltstone with minor silty claystone interbeds
24R-1, 135-138	19	VIB	h	14.70	2.32	2.86	29.0	Turbiditic siltstone and sandstone with <2% disseminated sulfide
25R-1, 120-123	19	IID	h	18.11	2.26	2.91	33.9	Highly distorted siltstone with silty claystone and fine-grained sandstone interbeds; rare sulfide
26R-2, 23-26	4	IID	h	12.45	2.38	2.86	25.7	Fine-grained sandstone, probably chlorite altered; no sulfide
27R-1, 102-105	14	IID	h	10.82	2.39	2.80	22.8	Altered turbiditic, laminated fine-grained sandstone interbedded with siltstone
27R-2, 26-29	3	IID	h	7.62	2.50	2.82	17.3	Laminated, bioturbated interbeds of silty claystone and siltstone
Escanaba Trough, Gorda Ridge
169-1037B-
58R-1, 105-108	7C	N/A	h	0.94	2.86	2.91	2.6	Altered fine-grained basalt with <1-mm-thick calcite + chlorite selvage vein
61R-1, 75-77	2	N/A	h	0.98	2.91	2.97	2.8	Fine- to medium-grained altered basalt; vesicles filled with smectite/chlorite
62R-1, 75-77	5B	N/A	h	1.18	2.93	2.99	3.3	Altered. medium-grained, plagioclase-phyric basalt with few thin chlorite/zeolite veins
169-1038I-
43X-3, 58-61	8	N/A	h	0.94	2.87	2.92	2.6	Massive, fine-grained, aphyric (flow?) basalt

Note: h = horizontal minicore oriented perpendicular to core axis; v = vertical minicore oriented parallel to core axis.