第30卷第1期 2016年2月
现代地质 GEOSCIENCE
江西南城地区中一新生代推滑覆构造研究
邓国辉，贺彬
（江西省地质调查研究院，江西南昌330030）
Vol. 30No. 1
Feb.2016
摘要：通过对江西南城地区侏罗系林山群与下伏前泥盆纪变质地层、白垩纪地层与前白垩纪地层接触关系调查和谢家构造窗、竺由新村构造窗、上乌石构造窗、望天石飞来峰的发现及钻孔验证，初步厘定了区内燕山期滑覆构造和喜马拉雅期推覆构造。燕山期滑覆构造发生在中侏罗世末，主滑面沿华力西一印支构造层（D一T，）、燕山构造层（T，一K，）与下伏地层间角度不整合面扩展而成，泥盆纪一早白垩世地层为滑覆体，滑覆在前泥盆纪变质地层之上，动力学来源为太平洋板块由南东向北西对欧亚板块俯冲。喜马拉雅期推覆构造规模大、动力学机制复杂（顺层和切层推覆），彻底打破了华南地区原有的地层沉积层序，形成了现存的横向分带、纵向分层的多层叠瓦、堆垛推覆构造格局。前白垩纪地质体为外来推覆体，由南东向北西推覆堆垛在白垩纪地层之上，白垩纪地层呈“构造窗”分布于前白垩纪地质体之下动力学来源可能为印度板块与欧亚板块碰撞形成。
关键词：推覆构造；滑覆构造；中一新生代；江西南城
中图分类号：P542
文献标志码：A
文章编号：10008527(2016)010097-13
Study on Thrust Nappe and Sliding Nappe Structures of Mesozoic-Cenozoic
intheNanchengArea，Jiangxi
DENG Guo-hui,HEBin
(Jiangxi Institute of Geological Surey，Nanchang，Jiangxi330030，China）
Abstract : Based on geological surveying and drilling verification of stratum contact relations both between Juras. sic Linshan Group and underlying Pre-Jurassic metamorphic strata and between Cretaceous and Pre-Cretaceous strata, this study has newly found the Xiejia structural window, Zhuyouxincun structural window, Shangwushi structural window and Wangtianshi klippe, and moreover, has determined the Yanshanian glide and Himalayan thrust nappe structures in Nancheng area, Jiangxi. The Yanshanian glide structure occurred in the end of Mid-dle Jurassic along the expanding surface from unconformity surfaces between D-T,/T,-K, (gliding nappe) and lower strata (underlying strata). The dynamics of glide structures maybe relate to the subduction of Pacific plate from southeast toward northwest. The large-scale Himalayan thrust nappe structure had thoroughly altered the former strata sequence and formed present tectonic framework. This framework is composed of multiple imbrica-ted thrust and stacking faults (bedding and cross-bedding) and behaves a feature of lateral zonation and vertical stratification. The allochthon Pre-Cretaceous mass thrusts from southeast toward northwest and stacks on the au-tochthon Cretaceous strata. The autochthon Cretaceous strata exhibit some windows around by Pre-Cretaceous. The dynamics of Himalayan thrust nappe structure is complicated and maybe relate to the distant effect of the collision between theEurasian plateand the Indian plate.
Key words: thrust nappe structure; sliding nappe structure; Mesozoic-Cenozoic; Nancheng, Jiangxi
收稿日期：2015-03-20；改回日期：2015-06-10：责任编辑：潘令枝。
基金项目：中国地质调查局项目"江西1:5万南城县、龙湖、株良、资福幅区域地质调查”（1212011120873）。
作者简介：邓国辉，男，教授级高级工程师，1963年出生，构造地质学专业，主要从事区域地质矿产调查研究工作
Email:dengguohui123@126.com。