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地质科学  1998, Vol. Issue (2): 158-165    DOI:
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浙西北地区反转构造初步研究
肖文交, 李继亮, 孙枢
1. 中国科学院地质研究所 北京 100101;
2. 中国科学院地质研究所 北京 100029
A PRELIMINARY STUDY OF THE INVERSION TECTONICS IN NW ZHEJIANG,SE CHINA
Xiao Wenjiao, Li Jiliang, Sun Shu
1. Institute of Geophysics, Chinese Academia of Sciences, Beijing 100101;
2. Institute of Geology, Chinese Academia of Sciences, Beijing 100029
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摘要 通过浙西北地区金衢、乌马和杭嘉湖3个地震解译剖面及地表地质的综合分析,指出研究区在以T2为主变形期的逆冲变形体制之前存在同方向的引张体制,并随后发生反转。通过计算反转比等综合分析,发现其总体反转程度自南东往北西方向逐渐变小,反映出反转后的褶皱冲断变形程度呈现自南东往北西方向变弱之趋势。
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肖文交
中国科学院地球物理研究所
李继亮
孙枢
关键词反转构造   反转比   浙江西北     
Abstract: Inversion tectonics has been considered as one of the main characteristics of foreland fold and thrust belts. One important parameter to describe the inversion degree of inversion tectonics is the inversion ratio, which is determined by comparing the apparent length along the fault-dipping direction before and after the inversion. The Jiangshan-Quzhou, Majin-Wuzhen and Hangzhou-Jiaxing-Huzhou cross section are selected to be discussed in Northwest Zhejiang foreland fold and thrust belt because they are distributed in the southwest, central and northwest cross sectional position, respectively. By calculating the inversion ratio and other synthetic analysing, we have found that an extensional realm that existed in the Palaeozoic period in Northwest Zhejiang had been transported into a compressional realm in the early Mesozoic time, and the degree of structural inversion decreases from southeast to northwest. Together with the spatial temporal distribution of the tectonic facies and structural styles in Northwest Zhejiang foreland fold and thrust belt, the authors conclude that the inversion tectonics is compatible to the tectonic vergence of Northwest Zhejiang foreland fold and thrust belt, and is probably due to a significant orogenesis which happened in Northwest Zhejiang in the early Mesozoic time.
Key wordsInversion tectonics   NW Zhejiang foreland fold and thrust belt   Inversion ratio   
收稿日期: 1996-11-04;
基金资助:

国家自然科学基金;中国科学院;中国博士后基金

引用本文:   
肖文交,中国科学院地球物理研究所,李继亮等. 1998, 浙西北地区反转构造初步研究. 地质科学, (2): 158-165.
Xiao Wenjiao,Li Jiliang,Sun Shu et al. A PRELIMINARY STUDY OF THE INVERSION TECTONICS IN NW ZHEJIANG,SE CHINA[J]. Chinese Journal of Geology, 1998, (2): 158-165.
 
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