greisen
/grahy-zuhn/US // ˈgraɪ zən //UK // (ˈɡraɪzən) //
老龄,年老的,老龄化,年迈的
Definitions
n.名词 noun
- 1
- : a hydrothermally altered rock of granitic texture composed chiefly of quartz and mica, common in the tin mines of Europe.
Examples
Greisen occurs typically in belts or veins intersecting granite.
Greisen is closely connected with schorl rock both in its mineralogical composition and in its mode of origin.
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