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 4
... area showed that the geo- logic conditions are almost identical throughout the metadiorite area . The Easyz Bird mine has therefore been assumed to be typical of this entire area . GEOLOGY The Mother Lode region of California embraces an ...
... area showed that the geo- logic conditions are almost identical throughout the metadiorite area . The Easyz Bird mine has therefore been assumed to be typical of this entire area . GEOLOGY The Mother Lode region of California embraces an ...
Page 34
... metadiorite area is now producing in the neighborhood of 200,000 per year from its cold lodes , and is capable of a much greater production , in- dicates that a more intensive study of these areas would be economically justified . There ...
... metadiorite area is now producing in the neighborhood of 200,000 per year from its cold lodes , and is capable of a much greater production , in- dicates that a more intensive study of these areas would be economically justified . There ...
Page 36
... metadiorite area . I As stated previously , there is no general accord in the theories explaining the phenomena of gold deposition in the Mother Lode area . The deposits of this meta diorite area are of the same general mesothermal type ...
... metadiorite area . I As stated previously , there is no general accord in the theories explaining the phenomena of gold deposition in the Mother Lode area . The deposits of this meta diorite area are of the same general mesothermal type ...
Contents
Factors Contributing to This Study | 23 |
Inaccuracies in Study | 28 |
Negative Results of Study | 31 |
2 other sections not shown
Common terms and phrases
420 drift Distance 420 drift Position 450 Distance 65 degrees 7x natural 7x natural size abundant altered to talc assay Au per ton bands Calcite Calculated pyrite value Central belt chalcopyrite constituent of specimen country rock cross-faults crystalline crystallized pyrite crystals see Plate degree of crystallization diorite Distance above level East belt east-west vein Easyz Bird vein estimated degree euhedral fissures foot-wall side Fracturing free gold Fyrite geology gold content Gold Deposits gold value gouge hanging-wall side highly altered impregnation inches irregular and massive Lovel Magnification massive and irregular massive bull massive pyrite mesothermal meta metadiorite area mineral MOKELUMNE HILL north-south vein system numbers perfect cubical crystals polished sections Position in vein precipitation present principal constituent PY Qtz pyrite crystals pyrite cubes Pyrite percentage Q+z Py raise Distance region Replacement slightly fractured small amount small irregular masses speci tion transparent Valuc vugs wall-rock walls