A Study of the Visible Indications of Ore Value in the Metadiorite of the Mother Lode Area Near Jackson, California ... |
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Page 13
Pyrite percentage, 0%. Quartz, essentially all massive "bull" quartz. loetadiorite,
traces of highly altered wiiite talc in seams. Calcite, none. Pyrite, none.
Magnification: Natural size. Remarks: This specimen is part of a large body of
barren quartz ...
Pyrite percentage, 0%. Quartz, essentially all massive "bull" quartz. loetadiorite,
traces of highly altered wiiite talc in seams. Calcite, none. Pyrite, none.
Magnification: Natural size. Remarks: This specimen is part of a large body of
barren quartz ...
Page
Quartz, body of s lecimen; nass of aniedral crystals. Metadiorite, small quantity;
lighly altered. Calcite, none. Pyrite, ostinated decree: 20%. Crystallization,
irregular and massive. Fracturino, none. Replacement, none. Magnification:
Specimen, .
Quartz, body of s lecimen; nass of aniedral crystals. Metadiorite, small quantity;
lighly altered. Calcite, none. Pyrite, ostinated decree: 20%. Crystallization,
irregular and massive. Fracturino, none. Replacement, none. Magnification:
Specimen, .
Page
Quartz, rain body of soecioen; transparent to milky; slio.tly fractured. Metadiorite,
very simall amount in seams; highly altored. Calcite, none. Pyrite, estinated
degree; 15% Crystallization, very small massive and irre-ular trains; associated
with ...
Quartz, rain body of soecioen; transparent to milky; slio.tly fractured. Metadiorite,
very simall amount in seams; highly altored. Calcite, none. Pyrite, estinated
degree; 15% Crystallization, very small massive and irre-ular trains; associated
with ...
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Common terms and phrases
8x natural 8x natural size abundant altered to talc approximate assay associated Au per ton bands belt body bull Calcite Calculated pyrite value California chalcopyrite completely concentration contained continued cubes cubic crystals deposition determination developed diorite Distance drift drift Distance east Easyz Bird estimated degree extent extreme fact fault feet fissures follows formation Fracturing Fracturinº free gold gold content gold value grains hanging-wall highly altered impregnation inches inclusions indication irregular Level Location Lovel Magnification masses massive material metadiorite area mineral mining Mother Lode movement nearly º º occurs photographs Plate polished sections Position in vein precipitation present principal constituent Pyrite percentage quantities quartz raise region relatively Replacement seams shown shows side small amount solutions speci Specimen stope structure taken throughout tion trace transparent vary vein system wall-rock walls wide
Bibliographic information
| Title | A Study of the Visible Indications of Ore Value in the Metadiorite of the Mother Lode Area Near Jackson, California ... |
| Author | Donald Kenneth Gill |
| Publisher | Stanford University, 1939 |
| Length | 170 pages |
| Export Citation | BiBTeX EndNote RefMan |