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A Study of the Visible Indications of Ore Value in the Metadiorite of the Mother Lode Area Near Jackson, California ...

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Stanford University, 1939 - Gold mines and mining - 170 pages

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Contents

Geology
5
Mineralogy and Petrography
12
Factors Contributing to This Study
23

3 other sections not shown

Common terms and phrases

25 degrees 420 drift Distance 5x natural 5x natural size abundant altered to impure altered to talc AMPHIBOLITE assay bands bull Calcite Calculated pyrite value Central belt chalcopyrite constituent of specimen country rock criteria cross-faults Crystallisation crystallization see Plate crystallized pyrite decree degree of crystallization diorite Distance above level Easyz Bird vein estimated degree euhedral feet fissure formation free gold gold content gold value gouge hanging-wall side highly altered impregnation of metadiorite inches incompletely altered indication intrusion irregular and massive Location Magnification massive and irregular massive pyrite metadiorite area mineral mining Mother Lode north-south vein system numbers occurs perfect cubical crystals polished sections Position in vein precipitation present principal constituent pyrite contains pyrite crystals pyrite cubes Pyrite percentage quartz raise Distance region Replacement riassive silica slightly fractured small amount snail solutions speci Specimen ITo stope sulphide tho vein tion transparent transverse faults vugs wall-rock

Bibliographic information

QR code for A Study of the Visible Indications of Ore Value in the Metadiorite of the Mother Lode Area Near Jackson, California ...
TitleA Study of the Visible Indications of Ore Value in the Metadiorite of the Mother Lode Area Near Jackson, California ...
AuthorDonald Kenneth Gill
PublisherStanford University, 1939
Length170 pages
  
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