"169-1036A-3H-2, 83-86 cm"				
Thin section: #43				
ROCK NAME: Mudstone breccia				
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OPAQUE		SIZE		
MINERALOGY	PERCENT	(mm)	MORPHOLOGY	COMMENTS
Pyrite	0.1	0.01	Anhedral	

NON-OPAQUE		SIZE		
MINERALOGY	PERCENT	(mm)	MORPHOLOGY	COMMENTS
Clay	90	0.002	Flakes	
Quartz	10	0.01		

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COMMENTS:					
"Hydraulic breccia. Angular clasts of mudstone, less than one centimeter in size, with jig-saw"					
cracks in a coarser-grained clay matrix. 					


"169-858G-17W-2, 58-63 cm"					
Thin section: # 31					
ROCK NAME: Anhydrite in CORK chimney					
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NON-OPAQUE				SIZE	
MINERALOGY	PERCENT	(mm)	MORPHOLOGY	COMMENTS	
Percentage of section: 70					
Anhydrite		70		0.05-10.0	Euhedral lath-shaped 
					and fibrous crystals.

VOID				SIZE			
SPACE		PERCENT	(mm)	MORPHOLOGY	COMMENTS		
		30		 			Open space between anhydrite crystals.
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COMMENTS: Interlocking open network of anhydrite crystals.							


"169-858G-18W-1, 123-129 cm"							
Thin section: # 33 (Polished slab)							
ROCK NAME: Sulfide chimney in CORK							
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OPAQUE				SIZE			
MINERALOGY	PERCENT	(mm)	MORPHOLOGY	COMMENTS			
Percentage of section: 30							
Pyrrhotite		60		0.02-0.1	Subhedral lath-shaped;	Cut hexagonal
blades; 						
					or anhedral grains.	Fine-grained aggregates with dark
inclusions in cores.						
Sphalerite		40		0.01-0.02	Rounded anhedral	Possible replacement
after wurtzite.						
					and subhedral with 	
					partly hexagonal outline. 	
Pyrite		Trace		~ 0.005	A few inclusions in pyrrhotite.	

NON-OPAQUE			SIZE			
MINERALOGY	PERCENT	(mm)	MORPHOLOGY	COMMENTS		
Percentage of section: 50						
Hose material and 						
a few crystals of anhydrite						

VOID				SIZE			
SPACE		PERCENT	(mm)	MORPHOLOGY	COMMENTS		
		20			Rounded holes in hose.		 
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COMMENTS: Pyrrhotite and sphalerite occur within CORK hose material. Two different							
morphologies of pyrrhotite; one as fine-grained aggregates and the							
other as coarser-grained hexagonal crystals.							


"169-858G-18W-1, 61-123 cm"							
Thin section: # 32 (Polished slab)							
ROCK NAME: Sulfide chimney in CORK							
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OPAQUE				SIZE			
MINERALOGY	PERCENT	(mm)	MORPHOLOGY	COMMENTS		
Percentage of section: 10-15						
Pyrrhotite		79		0.02-0.08	Subhedral lath-shaped	
					to hexagonal and anhedral 	
					fine-grained aggregates.	
Sphalerite		1		0.005-0.01	"Anhedral, rounded."	
Pyrite		20		0.01-0.04	Subhedral to euhedral	Partly replaces pyrrhotite.
					cubes and pyritohedrons.	

NON-OPAQUE			SIZE			
MINERALOGY	PERCENT	(mm)	MORPHOLOGY	COMMENTS		
Percentage of section: 80						
Anhydrite		30		0.05-1.0	Euhedral lath-shaped 	
					crystals.	
Hose (ex CORK material)	50		-			

VOID				SIZE			
SPACE		PERCENT	(mm)	MORPHOLOGY	COMMENTS		
		10-May			Rounded holes in hose.		 
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"COMMENTS: Pyrrhotite, pyrite and sphalerite in hose material. Two different morphologies of"							
pyrrhotite; one as fine-grained aggregates and the other more							
"common, as coarser-grained hexagonal crystals. Pyrite is partly replacing the pyrrhotite."							


"169-858G-19W-1, 0-9 cm"							
Thin section: # 34							
ROCK NAME: CORK Chimney sample							
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OPAQUE		SIZE					
MINERALOGY	PERCENT	(mm)	MORPHOLOGY	COMMENTS
Percentage of section: 10				
Pyrite		<0.001-0.1	"Anhedral, spheroidal grains,"	
			"some framboidal, some "	
			collomorphic. Some 	
			subhedral to euhedral grains.	
Pyrrhotite		0.01-0.1	Few euhedral laths 	"One grain with spongy texture,"
possible replacement artifact?				
			"and hexagonal grains, "	
			few anhedral grains. 	
Chalcopyrite		0.01-0.04	Anhedral.	Partly rounded grains.
Sphalerite		0.002-0.05	Anhedral. 	Partly rounded grains.
Galena		0.01-0.02	Anhedral grains.	Five grains observed.
"Brown phase,"		0.005-0.01	"Isotropic, anhedral."	
  associated with galena				
		 		
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COMMENTS: Difficult to estimate percentages as many phases plucked out during thin
sectioning.