| Geochemistry of the Shushui Complex,South Shanxi Province,China |
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| 作者单位： | 不详 |
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| 摘 要： |
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| 关 键 词： | 地球化学 山西 花岗岩 岩石学 大理石 长英矿物 上地壳 闪岩 石英岩 |
Geochemistry of the Shushui Complex,South Shanxi Province,China |
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| Authors: | Sun Yong Yu Zaiping |
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| Institution: | (1) Department of Geology, Northwest University, Xi′an |
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| Abstract: | The Shushui Complex can be divided into three rock units based on field investigation, petrography and geochemistry:(1) felsic
gneisses, (2) supracrustal rocks consisting of amphibolite, marble and quartzite, and (3) late granites. Of the complex, felsic
gneisses are dominant and formed in the Late Archaean, which were intruded by a basic dyke with a whole-rock Rb-Sr isochron
age of 2264±219 Ma. The data on rare-earth elements as well as on major and trace elements presented for most of the rock
types making up the complex suggest that (1) basic gneisses were produced by partial melting of mantle peridotite, followed
by fractional crystallization, and (2) felsic gneisses produced by varying degree of melting of a mafic source. The most suitable
tectonic setting to account for the generation of both types would be similar to the underplate setting. |
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