辽宁庄河鞍子山超单元岩浆侵位变形构造
Magmatic emplacement deformational structures of the Anzishan super-unit in Zhuanghe,Liaoning
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摘要: 鞍子山超单元由4个单元组成，各单元不同程度地发育岩浆侵位变形构造。侵位变形构造主要由叶理构造组成，闪长质包体，钾长石斑晶总体按优选方位定向，三者产状一致，平行接触带分布。从早期单元至晚期单元，随着岩浆侵位叶理构造变形强度减弱，闪长质包体数量减少，压扁变形程度降低，钾长石斑晶从明显按优选方位定向到杂乱分布。根据上述特征，将该超单元浆侵位变形、中等侵位变形、弱侵位变形及基本无侵位变形4个带。Abstract: The Anzishan super-unit consists of four units,and magmatic emplacement deformational struc-tures are developed to different degrees in these units.The main structure is foliation,and dioritic inclu-sions and K-feldspar phenocrysts generally display preferred orientation.The three have a consistent attitude and are distributed parallelly to the contact zone.From the early-formed units to late-formed unit,with weakening deformation intensity of magmatic emplacement foliation structure,the number of dioritic inclu-sions is reduced,the degree of flattening deformation decreases and the oriented K-feldspar phenocrysts are distributed at random.According to the above-mentioned features,the magmatic emplacement deforma-tional structures of this super-unit is classified into strong emplacement deformation,moderate emplacement deformation,weak emplacement deformation and essentially no emplacement deformation zones.
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