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 11
Page
... criteria might be established to set a value on exposed faces of ore without awaiting assay results . Such criteria would be a definite contribution to mining operations where immediate knowledge of approximate value is necessary . For ...
... criteria might be established to set a value on exposed faces of ore without awaiting assay results . Such criteria would be a definite contribution to mining operations where immediate knowledge of approximate value is necessary . For ...
Page 1
... criteria of value and can not be relied upon in the visible determinetion of gold value in this area . The area studied lies immediately to the east of the Central belt of the Mother Lode of California . It is located along the northern ...
... criteria of value and can not be relied upon in the visible determinetion of gold value in this area . The area studied lies immediately to the east of the Central belt of the Mother Lode of California . It is located along the northern ...
Page 31
... criteria for the determination of ore value . They will not be discussed in detail , but mention of them may be of ... criterion of value . In the massive pyrite found in the ore , some indication of the same ratio was noticed ; but this ...
... criteria for the determination of ore value . They will not be discussed in detail , but mention of them may be of ... criterion of value . In the massive pyrite found in the ore , some indication of the same ratio was noticed ; but this ...
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