I.D. 	1039B	42X-1	22-24 cm		Described by: jm/NLG	Date:  11Nov 96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Fine grained matrix with medium plagioclase glomerocrysts					
TEXTURE:	Holocrystalline: Glomeroporphyritic with intergranular to sub-ophitic matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS						
Olivine						
Plagioclase	20.0	19.0	<= 4	An 95	glomerocrysts	frequently twinned
	33.0	32.0	<= 0.2	An 78	laths and microlites	frequently in rosettes and sprays
Orthopyroxene						
Clinopyroxene	5.0	5.0	<=1	Augite	subhedral to euhedral stubby prisms	
	32.0	32.0	<= 0.2	Augite	subhedral to anhedral	
Opaque	5.0	5.0	<= 0.4	Ti-mag	cubic to subhedral and anhedral	"Larger grains show exsolution lamellae, anhedral is interstitial"
						
GROUNDMASS						
Plagioclase						
Olivine						
Clinopyroxene						
Mesostasis						
Glass	0.0					
Opaques						
Pyrite						
Chalcopyrite						
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	7					"alteration along vein boundary, around vesicles and carbonates"
Saponite	5					
Chlorite	1					
Carbonate	1					
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles	5		<=.5	lined	irregular	? badly altered glass plucked by polishing?
Vugs						
COMMENTS:	"Altered glass vein (saponite, tr. chlorite) cuts through slide, occasionally see grains broken and split apart by vein."					
	Sub-ophitic relationship occasionally seen between smaller plagioclase and pyroxene.					


I.D. 	1039C	7R-3	73-76 cm		Described by: jm/NLG	Date: 11 Nov 96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Fine grained matrix with medium plagioclase glomerocrysts					
TEXTURE:	Glomeroporphyritic with intergranular to sub-ophitic matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS						
Olivine						
Plagioclase	5.0	5.0	<=1		Glomerocrysts	often ragged or with inclusions of glass (altered to saponite) and opaques
	40.0	39.0	<=.8		laths	
Orthopyroxene						
Clinopyroxene	40.0	40.0	<=.6		euhedral-subhedral	
Opaque	5.0	5.0	<=0.2	Ti-Mag	cubic to subhedral	often with exsolution lamellae
						
GROUNDMASS						
Plagioclase						
Olivine						
Clinopyroxene						
Mesostasis						
Glass	5.0	2.0	0.05-0.5		interstitial pockets	"green-brown devitrified glass, variably altered to saponite."
Opaques	5.0	5.0	<=.2	Ti-mag	cubic to subhedral	
Pyrite						
Chalcopyrite						
						
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	4					
Saponite	4	glass				
						
						
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles						
Vugs						
COMMENTS:						


I.D. 	1039C	7R-2	31-34 cm		Described by:jm/NLG	11-Nov-96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Microcrystalline matrix with medium plagioclase glomerocrysts					
TEXTURE:	Glomeroporphyritic with intergranular-intersertal matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS						
Olivine						
Plagioclase	5.0	4.5	<=3	An 95	glomerocrysts	"ragged, with altered glass and opaque inclusions"
	16.0	16.0	<=0.3	An 78	laths	rosettes and sprays common
Orthopyroxene						
Clinopyroxene	6.0	6.0	<=0.3	augite	euhedral to subhedral	often stubby prisms
Opaque	4.0	4.0	<=0.3		cubic to anhedral	
						
GROUNDMASS						
Plagioclase	40.0	40.0	<=0.025		laths and anhedral grains	
Olivine						
Clinopyroxene	19.0	19.0	<0.02			
Mesostasis						
Glass	10.0	5.0			interstitial	"green brown glass, always devitrified and often altered to saponite"
Opaques	Tr					
Pyrite						
Chalcopyrite	Tr				euhedral-subhedral	interstitial
						
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	5.5					
Saponite	5.5	glass				
						
						
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles						
Vugs						
COMMENTS:	"0.5 mm wide chilled margin with 3% gloms (<1mm),  plagioclase laths (35%, <80micron) and pyroxene ( 10%, <60 micron), "					
	opaques (5%) in green brown glass((50%)					


I.D. 	1039C	7R-2	43-46 cm		Described by: jm/NLG	Date: 11Nov 96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Microcrystalline matrix with medium to coarse plagioclase glomerocrysts					
TEXTURE:	Glomeroporphyritic with intergranular-intersertal matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS						
Olivine						
Plagioclase	10.0	9.5	<=7	An 93	glomerocrysts	some zoned; fractured and pitted with altered glass and opaques along twin planes
	43.0	43.0	<=0.6	An 83	laths	often rosettes or sprays
Orthopyroxene						
Clinopyroxene	40.0	40.0	<=0.2	Augite	Euhedral to anhedral	stubby prisms or interstitial grains
Opaque	3.0	3.0	<=.05	Ti-mag	cubic to anhedral	anhedral grains typically are interstitial
						
GROUNDMASS						
Plagioclase						
Olivine						
Clinopyroxene						
Mesostasis						
Glass	2.0	0.0			Interstitial pockets	
Opaques	<1					
Pyrite						
Chalcopyrite						
						
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	4.5					
Saponite	4	glass				
Amphibole	0.25	pyroxene				
chlorite	0.25	glass				
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles						
Vugs						
COMMENTS:	"Plagioclase glomerocryst with included augite, poikilitic"					


I.D. 	1039C	8R-3	90-93 cm	Piece 1B	Described by: jm/NLG	Date: 12Nov 96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Fine-grained matrix with medium  plagioclase glomerocrysts					
TEXTURE:	Glomeroporphyritic with intergranular-intersertal matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS						
Olivine						
Plagioclase	5.0	4.5	<=4	An84-94	glomerocrysts	frequently with inclusions of altered glass and opaques
	50.0	50.0	<=0.2		laths	rosettes and sprays common
Orthopyroxene						
Clinopyroxene	40.0	40.0	<=0.3	augite	euhedral to subhedral	sometimes partly enclosed within plagioclase laths
Opaque	3.0	3.0	<=0.2	Ti-mag	cubic to subhedral	
						
						
GROUNDMASS						
Plagioclase						
Olivine						
Clinopyroxene						
Mesostasis						
Glass	2.0	1.0	<=0.2		interstitial 	green-brown devitrified glass
Opaques	trace				in glass	
Pyrite						
Chalcopyrite						
						
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	1.5					
Saponite	1.5	glass				
						
						
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles						
Vugs						
COMMENTS:	Very fresh					


I.D. 	1039C	8R-1	7-10 cm	Piece 3	Described by: jm/NLG	Date: 12Nov 96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Fine-grained  to very fine grained matrix with medium  plagioclase glomerocrysts					
TEXTURE:	Glomeroporphyritic with intergranular-intersertal matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS						
Olivine						
Plagioclase	25.0	24.0	<=5	An 90	glomerocrysts	
	27.0	26.0	<.08		laths	rosettes and sprarys common
Orthopyroxene						
Clinopyroxene	2.0	2.0	< 1	augite	euhedral to subhedral	stubby prisms
	24.0	24.0	<.02	augite	anhedral	in spaces between laths in rosettes
Opaque	5.0	5.0	<.01	Il/Mag	cubic to anhedral	often interstitial
						
GROUNDMASS						
Plagioclase						
Olivine						
Clinopyroxene						
Mesostasis						
Glass	14.0	1.5			interstitial	green-brown glass generally altered to saponite; some merely devitrified
Opaques	tr					
Pyrite						
Chalcopyrite						
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	15.5					
Saponite	15	glass				
chlorite	tr	lining vesicles				
						
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles	2		<0.05		irregular	
Vugs						
COMMENTS:	"5 mm chilled margin with Å15% plagioclase glomerocrysts (<1.5mm), 10% plagioclase laths (<40 microns), 10% clinopyroxene (<20microns), "					
	"5% opaques in 58% green-brown devitrified glass with 2% irregular, unconnected vesicles"					


I.D. 	1039C	8R-5	63-67 cm	Piece 2	Described by: jm/NLG	Date:12 Nov 96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Fine-grained  matrix with medium  plagioclase glomerocrysts					
TEXTURE:	Glomeroporphyritic with intergranular-intersertal matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS						
Olivine						
Plagioclase	3.0	2.0	<=2		Glomerocyrsts	altered glass + opaque inclusions along twin planes common
	42.0	35.5	<=0.3		laths	rosettes and sprays common
Orthopyroxene						
Clinopyroxene	42.0	42.0	<=0.2	augite	"euhedral, subhedral, and anhedral"	rare euhedral grains to 0.6 mm
Opaque	3.0	3.0	<=0.2	Ti-mag	cubic and anhedral	frequently interstitial
Amphibole	2.0	2.0	0.2		euhedral	pale green with weak yellow-brown pleochroism
						
GROUNDMASS						
Plagioclase						
Olivine						
Clinopyroxene						
Mesostasis						
Glass	5.0	0.0	<0.2		interstitial	completely altered to saponite
Opaques	Tr				in glass	
Pyrite	Tr				in glass	
Chalcopyrite	Tr				in glass	
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	12.5					
Saponite	12.5					"around vesicles, replacing glass and around cleavage fragments of broken grains"
						
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles	3					
Vugs						
COMMENTS:	"larger mineral grains frequently fractured, with undulose extinction"					


I.D. 	1039C	9R-1	2-4 cm	Piece 1A	Described by: jm	Date:12Nov96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Fine-grained  matrix with medium  plagioclase glomerocrysts					
TEXTURE:	Glomeroporphyritic with intergranular-intersertal matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS						
Olivine						
Plagioclase	5.0	4.0	<=3		Glomerocrysts	
	34.0	30.0	<=0.5		laths	
Orthopyroxene						
Clinopyroxene	44.0	44.0	<=0.3	augite	"euhedral, subhedral, and anhedral"	
Opaque	5.0	5.0	<=0.1	Ti-mag	cubic (rarely) and anhedral. Larger grains with exsolution lamellae	
						
GROUNDMASS						
Plagioclase						
Olivine						
Clinopyroxene						
Mesostasis						
Glass	10.0	0.0	0.1-0.3		interstitial	
Opaques	tr				in glass	
Pyrite	tr				in glass	
Chalcopyrite	tr				in glass	
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	14					
Saponite	14					"replacing glass, around vesicles and around cleavage fragments of broken grains"
Chlorite	tr					
						
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles	2	unconnected			irregular	
Vugs						
COMMENTS:	Larger mineral grains often fractured					


I.D. 	1039C	9R-2	45-48 cm	Piece 1B	Described by: NLG/jm	Date: 11Nov 96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Fine-grained  matrix with medium  plagioclase glomerocrysts					
TEXTURE:	Glomeroporphyritic with intergranular-intersertal matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS						
Olivine						
Plagioclase	3.0	2.8	<=4	An85	euhedral-subhedral	glomerocrysts with many inclusions
	47.0	47.0	<=0.5		laths	rosettes and sprays common
Orthopyroxene						
Clinopyroxene	40.0	40.0	<=0.3	Augite	subhedral	
Opaque	5.0	5.0	<=0.1	Ti-mag	subhedral to interstitial	larger grains with exsolution lamellae
						
						
GROUNDMASS						
Plagioclase						
Olivine						
Clinopyroxene						
Mesostasis						
Glass	5.0	0.0			Interstitial	
Opaques	Tr				acicular	in glass
Pyrite						
Chalcopyrite	Tr				subhedral	on edges of glass pockets
						
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	6					
Saponite	3	glass			Intercumulus	
Chlorite?	1	glass			""""	
Amphibole	2	Pyroxene			subhedral	Dark green; ? hydrothermal
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles						
Vugs						
COMMENTS:	"Poikilitic nature of some pyroxene suggests partial cumulate origin with crystal sequence: Plf I, clinopyroxene, Plf II, glass"					


I.D. 	1039C	10R-1	64-68 cm	Piece 1D	Described by: jm	Date: 15Nov96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Fine-grained  matrix with medium  plagioclase glomerocrysts					
TEXTURE:	Glomeroporphyritic with intergranular-intersertal matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS						
Olivine	1.0	1.0	<0.05		anhedral	
Plagioclase	5.0	5.0	<3		glomerocrysts	
	75.0	60.0	<=0.5		laths	rosettes and sprays common
Orthopyroxene						
Clinopyroxene	11.0	11.0	<=0.1	augite	subhedral to anhedral	mostly interstitial
Opaque	3.0	3.0	<=0.1	Ti-mag	cubic-anhedral	
						
GROUNDMASS						
Plagioclase						
Olivine						
Clinopyroxene						
Mesostasis						
Glass	5.0	0.0	.05-0.4		interstitial	completely altered to saponite
Opaques	tr					
Pyrite						
Chalcopyrite						
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	20					
Saponite	15	"glass, feldspar"				
Vein	5					"dark brown saponite, opaques, tr. chlorite, tr zeolites (?natrolite), milky feldspars, tr sulfides (?pyrite and chalcopyrite).  "
						
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles						
Vugs						
COMMENTS:	"Anastomosing 1-mm green-brown vein cutting thin section, shouldering aside broken grains, and disaggregating fractured wall-rock minerals.  "					
	Combination of habit and mineralogy suggests this was a melt vein. Larger grains frequently broken.					


I.D. 	1039C	10R-3	25-29 cm	Piece 1B	Described by: jm/NLG	Date: 15 Nov 96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Fine-grained  matrix with medium  plagioclase glomerocrysts					
TEXTURE:	Glomeroporphyritic with intergranular-intersertal matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS						
Olivine						
Plagioclase	5.0	4.5	<=3		glomerocrysts	
	51.0	48.0	<=0.4		laths	often in rosettes or sprays
Orthopyroxene						
Clinopyroxene	5.0	5.0	<=.3		subhedral	
	29.0	29.0	<0.1		anhedral	"often interstitial, in pockets between laths of plagioclase sprays"
Opaque	5.0	5.0	<0.25	Ti-mag	cubic to anhedral	anhedral concentrated in glass; sometimes occurring as chains
						
GROUNDMASS						
Plagioclase						
Olivine						
Clinopyroxene						
Mesostasis						
Glass	5.0	0.0	0.1-0.5		"interstitial, and as anastomosing dikelet"	completely altered to saponite and chlorite
Opaques						
Pyrite	Tr				blebs in glass	
Chalcopyrite	Tr				blebs-cubes in glass	
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	8.5					
Saponite	8	glass				plagioclase laths near glass
Chlorite	0.5	glass				
						
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles						
Vugs						
COMMENTS:	Large grains badly fractured 					


I.D. 	1039C	11R-1	58-61 cm	Piece 5	Described by: jm	Date: 16Nov96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Microcrystalline  matrix with medium  plagioclase glomerocrysts					
TEXTURE:	Glomeroporphyritic with intergranular matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS	50					
Olivine						
Plagioclase	15.0	15.0	<=5		Euhedral to subhedral	in glomerocrysts
	14.0	11.0	<=0.2		laths	
Orthopyroxene	1.0	1.0	<0.25		euhedral	
Clinopyroxene	1.0	1.0	<1.5	augite	"euhedral-subhedral, "	in glomerocrysts
	14.0	14.0	<0.25	augite	subhedral	as microphenocrysts
Opaque	5.0	5.0	<=0.05	Ti-mag	cubic to subhedral	"larger grains with exsolution lamellae, interstitial opaques rare"
						
GROUNDMASS	50.0					
Plagioclase	25.0	20.0	<=0.02		anhedral	crystallizing from intercumulus liquid
Olivine						
Clinopyroxene	20.0	20.0	<0.01		anhedral	crystallizing from intercumulus liquid
Mesostasis						
Glass	5.0	0.0	<0.1		Interstitial	completely altered to saponite
Opaques						
Pyrite						
Chalcopyrite						
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	13					
Saponite	12.5	glass				"replacing interstitial glass pockets, and traces of glass around microphenocrysts"
Chlorite	0.5	glass				
						
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles						
Vugs						
COMMENTS:	"Glomerocrysts of plagioclase, plagioclase plus pyroxene and of subhedral pyroxene (augite).  Often with sub-ophitic texture "					
	"in plagioclase-pyroxene glomerocrysts. Larger grains often show fracture into cleavage fragments, and undulose extinction."					
	Clear groundmass of glass plus microphenocrysts recognized.					


I.D. 	1039C	11R-1	82-86 cm	Piece 7	Described by: jm	Date: 16 Nov 96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Microcrystalline  matrix with medium  plagioclase glomerocrysts					
TEXTURE:	Glomeroporphyritic with intergranular matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS	40					
Olivine						
Plagioclase	15.0	14.0	<=4		euhedral-subhedral	glomerocrysts
	21.0	20.0	0.1-0.2		laths	frequently in rosettes and sprays
Orthopyroxene						
Clinopyroxene	4.0	4.0	<1.5	augite	euhedral	"stubby prisms, often twinned; frequently in glomerocrysts"
Opaque						
						
GROUNDMASS	60.0					
Plagioclase	40.0	25.0	<=0.08		"laths, subhedral-anhedral"	
Olivine						
Clinopyroxene	21.0	15.0	<=0.02		anhedral	
Mesostasis						
Glass	15.0	0.0	<=0.05		interstitial	completely altered to saponite with few % chlorite
Opaques	5.0	5.0	<.025	Ti-mag	cubic to subhedral	
Pyrite						
Chalcopyrite						
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	17					
Saponite	16	glass				
Chlorite	1	glass selvages				and lining vesicles
						
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles	3	unconnected	0.1-7	lined 	irregular	lined with chlorite
Vugs						
COMMENTS:	"Few clinopyroxene-rich glomerocrysts present.   Igneous layering apparent in hand sample: in thin section, layering is formed  "					
	by alternating glass- and microphenocryst-rich layers with glomerocryst- and phenocryst-rich layers.					
	"Glass-rich areas: 30% glass, 10%  gloms (<2mm), 35% plagioclase laths (<0.05mm), 25% clinopyroxene (<0.2)"					


I.D. 	1039C	11R-2	47-50 cm	Piece 1A	Described by: jm/NLG	Date: 16Nov 96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Fine-grained matrix with medium  plagioclase glomerocrysts					
TEXTURE:	Glomeroporphyritic with intergranular-intersertal matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS						
Olivine						
Plagioclase	10.0	9.5	<=4	An85	euhedral to subhedra	in glomerocrysts
	40.0	40.0	<=0.4		laths	frequently in rosettes or sprays
Orthopyroxene						
Clinopyroxene	5.0	5.0	<0.8	augite	euhedral	
	35.0	35.0	<0.1		subhedral	between laths in plagioclase rosettes and sprays
Opaque	5.0	5.0	<0.05	Timag	"cubic, subhedral, anhedral"	larger grains with exsolution lamellae.  Rare Ti-mag blades in sprays or cruciform rosettes 
						
GROUNDMASS						
Plagioclase						
Olivine						
Clinopyroxene						
Mesostasis						
Glass	3.0	0.0	<=0.1		interstitial pockets	replaced by saponite
Glass	2.0	0.0	<=1		ovoids-glass filled vugs	"replaced by saponite, chlorite and tr zeolites"
Opaques						
Pyrite	Tr					
Chalcopyrite	Tr					
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	5.5					
Saponite	3	glass				
Chlorite	2	glass				
Zeolite	tr	glass				
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles						
Vugs	2	irregular	<1	altered glass	rounded-ovoid	
COMMENTS:	Clinopyroxene glomerocrysts to 2 mm; nearly straight grain boundaries between clinopyroxenes and 					
	nearly equal angle triple junctions suggest recrystallization.					


I.D. 	1039C	11R-2	74-76 cm		Described by: jm/NLG	Date: 16Nov 96
ROCK NAME:	One pyroxene glomeroporphyritic gabbro					
GRAIN SIZE:	Fine-grained matrix with medium  plagioclase glomerocrysts					
TEXTURE:	Glomeroporphyritic with intersertal- seriate porphyritic matrix					
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS	60					
Olivine						
Plagioclase	10.0	10.0	<=3	An 94	euhedral to subhedral	in glomerocrysts
	23.0	23.0	<=0.6		laths	commonly in rosettes and sprays
Orthopyroxene						
Clinopyroxene	22.0	22.0	<1		euhedral and subhedral	rarely growing in rosettes or sprays
Opaque	5.0	5.0	<0.1	Ti-mag	cubic to subhedral	sometimes in rosettes
						
GROUNDMASS						
Plagioclase	16.0	16.0	<=0.05		laths and anhedral	anhedral grains crystallizing between smaller plagioclase laths
Olivine						
Clinopyroxene	15.0	15.0	<=0.025		anhedral	often crystallizing between plagioclase laths
Mesostasis						
Glass	7.0	4.0	<.05		interstitial	devitrified and partially replaced by saponite
Glass	2.0	0.0				Several 1-2 mm wide altered glass vein with chlorite and ?tr zeolites
Opaques	tr					euhedral and skeletal magnetite? w/exsolution lamellae
Pyrite						
Chalcopyrite	tr					
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL	5					
Saponite	4	glass				
Chlorite	1	glass				
						
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles						
Vugs						
COMMENTS:	Plagioclase-clinopyroxene glomerocrysts; plagioclase is sometimes zoned (unlike laths). Pyroxenes within clots show straight grain					
	boundaries and equal angle triple junctions suggesting recrystallization. Pyroxenes in groundmass with more irregular boundaries					
	suggesting primary crystallization of groundmass pyroxene. A large pyroxene grain poikilitically encloses small euhedral-subhedral					
	plagioclase grains which appear partly resorbed--?cumulate evidence.					

I.D. 					Described by:	Date:
ROCK NAME:						
GRAIN SIZE:						
TEXTURE:						
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS						
Olivine						
Plagioclase						
						
Orthopyroxene						
Clinopyroxene						
Opaque						
						
						
GROUNDMASS						
Plagioclase						
Olivine						
Clinopyroxene						
Mesostasis						
Glass						
Opaques						
Pyrite						
Chalcopyrite						
						
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL						
Saponite						
						
						
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles						
Vugs						
COMMENTS:						






I.D. 					Described by:	Date:
ROCK NAME:						
GRAIN SIZE:						
TEXTURE:						
PRIMARY MINERALOGY	PERCENT PRESENT	PERCENT ORIGINAL	SIZE (mm)	COMPO-SITION	MORPHOLOGY	COMMENTS
PHENOCRYSTS						
Olivine						
Plagioclase						
						
Orthopyroxene						
Clinopyroxene						
Opaque						
						
						
GROUNDMASS						
Plagioclase						
Olivine						
Clinopyroxene						
Mesostasis						
Glass						
Opaques						
Pyrite						
Chalcopyrite						
						
						
SECONDARY MINERALOGY	PERCENT	REPLACING/ FILLING				COMMENTS:
TOTAL						
Saponite						
						
						
VESICLES/ CAVITIES	PERCENT	DISTRIBUTION	SIZE (mm)	FILLING	SHAPE	COMMENTS:
Vesicles						
Vugs						
COMMENTS: