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,将该超单元岩浆侵位变形构造划分为强侵位变形、中等侵位变形、弱侵位变形及基本无侵位变形4个带。
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.
出处
《地质通报》
CAS
CSCD
北大核心
2003年第2期118-123,共6页
Geological Bulletin of China
关键词
辽宁庄河
鞍子山超单元
叶理构造
闪长质包体
岩浆侵位变形构造
晚侏罗世
Anzishan super-unit
foliation structure
dioritic inclusion
magmatic emplacement deforma-tional structure
Late Jurassic
Zhuanghe,Liaoning