Metamorphic Minerals and Metamorphism of Anshan Group in Anshan-Benxi Area Liaoning
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    Abstract:

    Anshan Archaean metamorphic complex occurs in Anshan-Benxi area that can be subdivided into three districts, i.e., Anshan, Liaoyang and Benxi. The metamorphic grade of all the rocks belongs to amphiholite facies. In general, the grade of metamorphism increases from the west to the east. The typical metamorphic minerals which firstly occur in the metamorphic rocks are respectively almandine, staurolite and sillimanite in Anshan, Liaoyang and Benxi. Nevertheless, the grade of retrogressive metamorphism with strong deformation increases from the east to the west, and the metamorphic rocks in Anshan district have become greenschist facies ones. The previous metamorphic minerals of amphibolite facies occur only as metasomatic residual minerals in chlorite and sericite. Hypersthene, andalusite and spinel have been found in metamorphic rocks at Xiaolingzi in Anshan district. The metamorphic grade of these rocks discords with other rocks in the same district. It is evident that these rocks suffered contact metamorphism after regional metamorphism of amphibolite facies.

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翟明国,J. D. Sills, B. F. Windley,1990,鞍本地区鞍山群变质矿物及变质作用[J].岩石矿物学杂志,9(2):148~158. Zhai Mingguo,1990,Metamorphic Minerals and Metamorphism of Anshan Group in Anshan-Benxi Area Liaoning[J]. Acta Petrologica et Mineralogica,9(2):148~158.

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