A Study of the Visible Indications of Ore Value in the Metadiorite of the Mother Lode Area Near Jackson, California ... |
From inside the book
Results 1-3 of 17
Page 4
... throughout the metadiorite area . The Easyz Bird mine has therefore been assumed to be typical of this entire area . GEOLOGY The Mother Lode region of California embraces an area bout 100 miles long and 20 miles wide . It extends from ...
... throughout the metadiorite area . The Easyz Bird mine has therefore been assumed to be typical of this entire area . GEOLOGY The Mother Lode region of California embraces an area bout 100 miles long and 20 miles wide . It extends from ...
Page 12
... throughout the vein at about 50 degrees to the east . This is thought to be due to the influence of the north - south vein system and of the transverse faults which intersect the vein at this angle . It is apparent that ore shoots have ...
... throughout the vein at about 50 degrees to the east . This is thought to be due to the influence of the north - south vein system and of the transverse faults which intersect the vein at this angle . It is apparent that ore shoots have ...
Page 22
... throughout the vein . They are found either in the quartz or in the metadiorite ; but when quartz and metadiorite are found together , more of the pyrite is usually associated with the metadiorite than the quartz . Isolated pyrite ...
... throughout the vein . They are found either in the quartz or in the metadiorite ; but when quartz and metadiorite are found together , more of the pyrite is usually associated with the metadiorite than the quartz . Isolated pyrite ...
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