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 7
... cross - faults range from a few inches to 50 feet . Indications are that faulting in the The veins was contemporaneous with the formation of the veins , and continued after the deposition of th vein material . cross - faults appear to ...
... cross - faults range from a few inches to 50 feet . Indications are that faulting in the The veins was contemporaneous with the formation of the veins , and continued after the deposition of th vein material . cross - faults appear to ...
Page 10
... cross - faults . about 10 feet ; but in places it is as much as 30 feet wide , and in exceptional locations it narrows to a gouge not over one foot in width . The walls of the vein are well defined and are composed of firm metadiorite ...
... cross - faults . about 10 feet ; but in places it is as much as 30 feet wide , and in exceptional locations it narrows to a gouge not over one foot in width . The walls of the vein are well defined and are composed of firm metadiorite ...
Page 25
... cross - cuts were run . Ample opportunity was thus afforded for the study of the vein minerals , the faults , and the general characteristics of the area . During this investigation , typical ore specimens were collected for further ...
... cross - cuts were run . Ample opportunity was thus afforded for the study of the vein minerals , the faults , and the general characteristics of the area . During this investigation , typical ore specimens were collected for further ...
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