A preliminary study of NW Zhejiang foreland fold and thrust belt in Southeast China  

作　　者：肖文交 李继亮 何海清 陈海泓 

机构地区：[1]Institute of Geophysics, Chinese Academy of Sciences, Beijing 100101, China [2]Institute of Geology,Chinese Academy of Sciences,Beijing 100029,China [3]Institute of Petroleum Exploration &Development,China Oil and Gas Corp,Beijing 100083,China

出　　处：《Science China Earth Sciences》1997年第4期418-423,共6页中国科学（地球科学英文版）

基　　金：Project supported by the National Natural Science Foundation of China and Chinese Academy of Sciences

摘　　要：The Upper Permian Dalong Formation (P2d) and Changxing Formation (P2c), and the Lower Tri-assic Zhengtang Formation (Tiz) are of deep-water turbidites. The sedimentary features of the NW Zhejiang are of SE-dipping passive continental margin from the Paleozoic to the early Triassic. Together with the foreland molasse basin during the late Triassic (T3w), the tectonics of the NW Zhejiang is characterised by a tectogenesis which took place in the middle Triassic. From SE to NW, the structural style varies from multi-duplex, antiformal stack to imbricate fans, and then to Jura Mountain-type fold zone with fold-style varying gradually from large-scale tight fold to mid-scale chevron fold, then to cylindrical fold, reviewing a preliminary scenario of foreland fold and thrust belt. The space-distributed structures and the tectonic vergence indicate the significance of deformation in (T1-T3).The Upper Permian Dalong Formation (P2d) and Changxing Formation (P2c), and the Lower Tri-assic Zhengtang Formation (Tiz) are of deep-water turbidites. The sedimentary features of the NW Zhejiang are of SE-dipping passive continental margin from the Paleozoic to the early Triassic. Together with the foreland molasse basin during the late Triassic (T3w), the tectonics of the NW Zhejiang is characterised by a tectogenesis which took place in the middle Triassic. From SE to NW, the structural style varies from multi-duplex, antiformal stack to imbricate fans, and then to Jura Mountain-type fold zone with fold-style varying gradually from large-scale tight fold to mid-scale chevron fold, then to cylindrical fold, reviewing a preliminary scenario of foreland fold and thrust belt. The space-distributed structures and the tectonic vergence indicate the significance of deformation in (T1-T3).

关 键 词：TURBIDITES passive continental margin FORELAND MOLASSE duplex FORELAND FOLD and thmst belt 

分 类 号：P534[天文地球—古生物学与地层学]