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 11
The vein is composed essentially of quartz which occurs as massive "bull" quartz,
sugar quartz, quartz crystals, and as bands with the metadiorite included in the
vein. oecond to quartz in volume of vein material is metadiorite, which occurs in a
...
The vein is composed essentially of quartz which occurs as massive "bull" quartz,
sugar quartz, quartz crystals, and as bands with the metadiorite included in the
vein. oecond to quartz in volume of vein material is metadiorite, which occurs in a
...
Page 13
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. It is milk-white in
color ...
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. It is milk-white in
color ...
Page
Quartz, principal constituent; massive "bull" quartz - Metadiorite, ver small amount
in seams. Calcite, none. Pyrite, estimated decree: 30%. Crystallization, irregular
masses. Fracturing, sliont. Replacement, none. Magnification: Specimen, .6x ...
Quartz, principal constituent; massive "bull" quartz - Metadiorite, ver small amount
in seams. Calcite, none. Pyrite, estimated decree: 30%. Crystallization, irregular
masses. Fracturing, sliont. Replacement, none. Magnification: Specimen, .6x ...
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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 |