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 36
... original source of the gold solutions . It is thought that these veins would be indistinguishable from those of the Mother Lode if the rocks in which they are formed had been of the same type . It is not the purpose of this paper to ...
... original source of the gold solutions . It is thought that these veins would be indistinguishable from those of the Mother Lode if the rocks in which they are formed had been of the same type . It is not the purpose of this paper to ...
Page 41
... original solutions which is in reality , the most important of all . If the original solutions contained pyrite but not gold , the degree of crystal- lization would have no value as a criteria of cold content . However , in any one ...
... original solutions which is in reality , the most important of all . If the original solutions contained pyrite but not gold , the degree of crystal- lization would have no value as a criteria of cold content . However , in any one ...
Page
... , relic structure of well defined cubic crystals . Fracturing , quite extensive . Replacement , has greatly altered the original structure . Magnification : Specimen , .7x natural size . 1 Section , 5x natural size . Plate No. 15.
... , relic structure of well defined cubic crystals . Fracturing , quite extensive . Replacement , has greatly altered the original structure . Magnification : Specimen , .7x natural size . 1 Section , 5x natural size . Plate No. 15.
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