fissure vein


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fissure vein

[′fish·ər ‚vān]
(geology)
A mineral deposit in a cleft or crack in the rock material of the earth's crust.
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References in periodicals archive ?
The Ccello Ccello Property consists of 2,700 hectares that includes a zone of vuggy-silica, advanced argillic alteration and fissure veins, commonly associated with copper-gold porphyry systems, over an area of 3 km by 4 km.
5 km wide area consisting of two principal belts: 1) the middle and western mines are hosted by a potassium-rich rhyolitic volcanic rock in which the mineralization occurs in cross-cutting fissure veins, and; 2) the eastern mines where mineralization is hosted by manganese and iron-rich carbonate beds that contain disseminated magnetite, pyrrhotite and other sulphide minerals.
The veins are quartz/calcite fissure veins, mineralized by what appear to be multi-stage mineralizing events.
Fracture zones containing the mineralized fissure veins and the more diffuse mineralization in their surrounding brecciated rhyolitic hostrocks, are localized along the western flank of an elongated dacitic dome.
The Properties include virtually the entire gold/quartz vein complex at Bad Vermilion Lake where over 100 deep-seated, sheeted fissure veins have all recorded varying gold values.
Underlying remnants of extensive Roman surface workings, mineralization at Chala, is hosted within classic fissure-type, low-sulphidation, epithermal fissure veins and breccias.