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 1
in gold content from 0.1 to about 38 ounces, per ton; thus the ability to determine
the approximate value of the pyrite-bearins: rock becomes of great importance in
the mine operations. An ore study of this area was carried out over the past eight
...
in gold content from 0.1 to about 38 ounces, per ton; thus the ability to determine
the approximate value of the pyrite-bearins: rock becomes of great importance in
the mine operations. An ore study of this area was carried out over the past eight
...
Page 35
Another marked contrast is found in the quantity of free gold occurring in the ores.
In general, much of the gold value of the Mother Lode ores has bee - accounted
for in free gold. Ores of the metadiorite veins are very low in free gold content, ...
Another marked contrast is found in the quantity of free gold occurring in the ores.
In general, much of the gold value of the Mother Lode ores has bee - accounted
for in free gold. Ores of the metadiorite veins are very low in free gold content, ...
Page 40
Most of the pyrite, along with the gold, was carried on by the ascending solutions
to points where conditions of more rapid ... It also follows that the more massive
the pyrite, the higher the gold content because the saturation of the solution had ...
Most of the pyrite, along with the gold, was carried on by the ascending solutions
to points where conditions of more rapid ... It also follows that the more massive
the pyrite, the higher the gold content because the saturation of the solution had ...
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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 |