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 18
Donald Kenneth Gill. Pyrite cubes in massive " bull " quartz and crystalline calcite . Location : Level , 450 No. 6 raise Distance above level , 15 ft . Position in vein , center to ... cubes assay 0.10 oz . Au per ton . her Plate No. 8 .
Donald Kenneth Gill. Pyrite cubes in massive " bull " quartz and crystalline calcite . Location : Level , 450 No. 6 raise Distance above level , 15 ft . Position in vein , center to ... cubes assay 0.10 oz . Au per ton . her Plate No. 8 .
Page 18
... level , 15 ft . Position in vein , center to hanging - wall . Magrification : Re arks : .5x natural size . Pure pyrite cubes assay 0.10 oz . Au per ton . 2 ber 32 Fractured pyrite cube , showing quartz fracture Plate No. 8 .
... level , 15 ft . Position in vein , center to hanging - wall . Magrification : Re arks : .5x natural size . Pure pyrite cubes assay 0.10 oz . Au per ton . 2 ber 32 Fractured pyrite cube , showing quartz fracture Plate No. 8 .
Page
... cubes ; 1 6 i GI ... ९ 1 Specimen No. 44 Location. highly distorted . Fracturing , extreme . Replacement , pyrite being replaced by calcite and quartz . Magnification : Remarks : Specimen , natural size . Section , 5x natural size ...
... cubes ; 1 6 i GI ... ९ 1 Specimen No. 44 Location. highly distorted . Fracturing , extreme . Replacement , pyrite being replaced by calcite and quartz . Magnification : Remarks : Specimen , natural size . Section , 5x natural size ...
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