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 14
... alteration to impure talc, Calcite, abundant as impregnation and as small irrtjgul.'-r masses in metadiorite. Pyrite, estimated degree: 95$. Crystallization, perfect cubical crystals. Fracturing, none. Replacement, none. Magnification ...
... alteration to impure talc, Calcite, abundant as impregnation and as small irrtjgul.'-r masses in metadiorite. Pyrite, estimated degree: 95$. Crystallization, perfect cubical crystals. Fracturing, none. Replacement, none. Magnification ...
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... alteration to impure talc . Calcite , abundant as impregnation and as small irregular masses in metadiorite . Pyrite , estimated degree : 95 % . Crystallization , perfect cubical crystals . Fracturing , none . Replacement , none ...
... alteration to impure talc . Calcite , abundant as impregnation and as small irregular masses in metadiorite . Pyrite , estimated degree : 95 % . Crystallization , perfect cubical crystals . Fracturing , none . Replacement , none ...
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... altered to impure talc ; shows as black in both pictures . Calcite , widespread as an impregnation and occurring with the quartz . Pyrite , estimated degree : 30 % . Crystallization , massive and irregular ; mostly in very small specks ...
... altered to impure talc ; shows as black in both pictures . Calcite , widespread as an impregnation and occurring with the quartz . Pyrite , estimated degree : 30 % . Crystallization , massive and irregular ; mostly in very small specks ...
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