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Formation of systems of parallel greisen lodes in the granites of SW England

机译:SW英格兰花岗岩平行Greisen租罗诗地的形成

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Swarms of parallel lodes containing an assemblage of quartz-feldspar-wolframite-cassiterite-muscovite together with variable amounts of loellingite, copper-tin sulphides and molybdenite, with or without topaz, fluorite, apatite and/or accessory tourmaline and with well-defined selvedges of alteration are recognised to be one of the characteristic expression of the pneumatolytic stage of mineralization in peraluminous, S-type granites. Observations of well-exposed systems in SW England are used to place constraints on the conditions under which the fractures formed and the minerals were deposited.
机译:平行乐节的群体含有石英 - 长石 - Wolframite-Cassitite-Muscovite的组合,以及可随变量的稀释石,铜 - 硫化物和钼,有或没有黄玉,萤石,磷灰石和/或配件助推器以及定义明确的校验易于改变是灭菌,S型花岗岩中矿化阶段的特征表达之一。 SW英格兰曝光系统的观察用于对所形成的裂缝和矿物沉积的条件进行限制。

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