A Study of the Visible Indications of Ore Value in the Metadiorite of the Mother Lode Area Near Jackson, California ... |
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Results 1-3 of 4
Page 4
... belts of gold - bearing quartz voins , known as the East belt , the West belt , and the Central belt . The Mother Lode 1 1 Eddy , Louis H .: The Mother Lole Region , California . ing and Mining Journal , Febr . 22 , 1913 . Engineer- 1 ...
... belts of gold - bearing quartz voins , known as the East belt , the West belt , and the Central belt . The Mother Lode 1 1 Eddy , Louis H .: The Mother Lole Region , California . ing and Mining Journal , Febr . 22 , 1913 . Engineer- 1 ...
Page 5
... Central belt and the Calaveras slates of the East belt ( see Plate No. 1 ) . The triangle measures about three miles on each side , and the west side lies parallel to the Central belt , the strike of the contact being about N. 25 ...
... Central belt and the Calaveras slates of the East belt ( see Plate No. 1 ) . The triangle measures about three miles on each side , and the west side lies parallel to the Central belt , the strike of the contact being about N. 25 ...
Page 33
... Central belt of the Mother Lode nor is it a part of the East belt . It is rather like an island lying between the two belts , which is distinct from either of them . The veins lying both to the east and to the west occur in altered ...
... Central belt of the Mother Lode nor is it a part of the East belt . It is rather like an island lying between the two belts , which is distinct from either of them . The veins lying both to the east and to the west occur in altered ...
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