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 23
Donald Kenneth Gill. Small amounts of free gold occur in the ore of the Easyz Bird vein . A fow pieces are recovered in the process of milling , which vary up to one - third of an ounce in size . No free gold has been encountered in the ...
Donald Kenneth Gill. Small amounts of free gold occur in the ore of the Easyz Bird vein . A fow pieces are recovered in the process of milling , which vary up to one - third of an ounce in size . No free gold has been encountered in the ...
Page 26
... free gold in the ore of the region is very rare was amply demonstrated by the fact that all of the check assays corresponded very closely to the originals . This is also true of the general assaying at the Easyz Bird mine , and could ...
... free gold in the ore of the region is very rare was amply demonstrated by the fact that all of the check assays corresponded very closely to the originals . This is also true of the general assaying at the Easyz Bird mine , and could ...
Page 35
... free gold occurring in the ores . In general , much of the gold value of the Mother Lode ores has bee . accounted for in free gold . Ores of the metadiorite veins are very low in free gold content , and the gold in intimate association ...
... free gold occurring in the ores . In general , much of the gold value of the Mother Lode ores has bee . accounted for in free gold . Ores of the metadiorite veins are very low in free gold content , and the gold in intimate association ...
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