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
... Euhedral quartz crystals are rather rare , but have been found in several places in the Easyz Bird vein , and have been seen in the outcrops of some of the other veins ( see Plate No. 6 ) . These crystals occur in vugs which are usually ...
... Euhedral quartz crystals are rather rare , but have been found in several places in the Easyz Bird vein , and have been seen in the outcrops of some of the other veins ( see Plate No. 6 ) . These crystals occur in vugs which are usually ...
Page 42
... euhedral crystals . 1 SUMMARY This study has resulted in establishing the fact that the degree of crystallization of pyrite and the gold content of the pyrite are in inverse ratio , and that chalcopyrite contains high cold value . The ...
... euhedral crystals . 1 SUMMARY This study has resulted in establishing the fact that the degree of crystallization of pyrite and the gold content of the pyrite are in inverse ratio , and that chalcopyrite contains high cold value . The ...
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... euhedral crystals , as cement , and in small stringers in the netadiorite . Pyrite , estimated degree : 50 % Crystallization , generally irregular and massive with sone roughly cubic crystals . Fracturing , none . Replacement , none ...
... euhedral crystals , as cement , and in small stringers in the netadiorite . Pyrite , estimated degree : 50 % Crystallization , generally irregular and massive with sone roughly cubic crystals . Fracturing , none . Replacement , none ...
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