Vein (geology)
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In geology, a vein is a distinct sheetlike body of crystallized minerals within a rock. Veins form when mineral constituents carried by an aqueous solution within the rock mass are deposited through p
White veins in dark rock at Imperia, Italy
A quartz vein, prominent from the surrounding weathered rock at Cape Jervis, South Australia
Boudinaged quartz vein (with strain fringe) showing dextral shear sense. Starlight Pit, Fortnum Gold Mine, Western Australia.
In situ gold-bearing vein (in brown) at the Toi gold mine, Japan.
Boudinage
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Boudinage is a geological term for structures formed by extension, where a rigid tabular body such as hornfels, is stretched and deformed amidst less competent surroundings. The competent bed begins t
Vein (geology)
…mining, and in some cases gold mineralisation is restricted entirely to the altered wall rocks within which entirely barren quartz veins are hosted. Boudinage Ore genesis…
Small-scale boudinage
Boudinaged quartz vein within blueschist, Samos, Greece.
Boudinage in Greenland near Kangerlussuaq