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Bog, hæftet The Banket: A Study of the Auriferous Conglomerates of the Witwatersrand and the Associated Rocks (Classic Reprint) af Robert Burns Young

The Banket: A Study of the Auriferous Conglomerates of the Witwatersrand and the Associated Rocks (Classic Reprint)

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Excerpt from The Banket: A Study of the Auriferous Conglomerates of the Witwatersrand and the Associated Rocks

The metamorphic rocks occur in narrow, irregular belts ¿anked by wide areas of granite. They are generally highly folded and dip at steep angles, their strike confor... Læs mere

Excerpt from The Banket: A Study of the Auriferous Conglomerates of the Witwatersrand and the Associated Rocks

The metamorphic rocks occur in... Læs mere

Produktdetaljer:

Sprog:
Engelsk
ISBN-13:
9781334396694
Sideantal:
202
Udgivet:
01-11-2016
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Excerpt from The Banket: A Study of the Auriferous Conglomerates of the Witwatersrand and the Associated Rocks

The metamorphic rocks occur in narrow, irregular belts ¿anked by wide areas of granite. They are generally highly folded and dip at steep angles, their strike conforming more or less to the edges of the belts.

The granite is mainly the biotite variety, though muscovite and hornblende are occasionally present. Frequently, and more especially in the neighbourhood of its contact with the schists, it assumes a gneissose structure. This, in most cases, is obviously due not to subsequent pressure but to differential movement during consolidation.

A considerable resemblance is observable between the rocks of the Swaziland System, and the auriferous Archaean schists of Western Australia and Southern India.

Gold deposits are found in all the types of rock composing the metamorphic belts, and also occasionally in the granite and gneiss of the bathyliths. They occur as quartz veins or as impregnated bodies of rock.

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