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 37
... solutions ascending from the source were most likely siliceous in the first place . The mode of deposition was by filling during the successive reopenings of the fissures . The gold was undoubtedly derived from the magmatic emanations ...
... solutions ascending from the source were most likely siliceous in the first place . The mode of deposition was by filling during the successive reopenings of the fissures . The gold was undoubtedly derived from the magmatic emanations ...
Page 38
... solution was caused by cooling of the solutions and , probably to a greater extent , by volatilization of the ascending solutions . The escape into the wall - rock of rasses and other elements of the solution which acted as solvents was ...
... solution was caused by cooling of the solutions and , probably to a greater extent , by volatilization of the ascending solutions . The escape into the wall - rock of rasses and other elements of the solution which acted as solvents was ...
Page 40
... solutions . Under such conditions of deposition , the satura- tion of pyrite in the solution was necessarily far beyond the saturation point , else the deposition would have been slower and crystals would have formed . When the solutions ...
... solutions . Under such conditions of deposition , the satura- tion of pyrite in the solution was necessarily far beyond the saturation point , else the deposition would have been slower and crystals would have formed . When the solutions ...
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