第25卷第6期 2011年12月
现代地质 GFONCIENCE
VoL 25
No.6 Der.2011
雪峰山西部中生代厚皮逆冲推覆构造样式与
变形特征研究
汪昌亮，颜丹平1,2，张冰'，许延波"，汤双立
（1.中国地质大学地球科学与资源学院，北京100083；2.中国地质大学地质过程与矿产资源国家重点实验室，北京100083）摘要：雪峰山厚皮逆冲推覆构造带位于扬子地块东南缘，由南向北，主构造线走向由北北东向渐变为北东东向，形成向北西突出的强形。构造带内基底新元古界板溪群大面积出露，这些基底出露的原因和构造方式是华南中生代大地构造分析的核心问题之一。以野外构造解析为基础，结合相关地球物理资料解释，对雪峰山西部逆冲推覆构造的构造样式与变形序列进行了系统的解析。结果表明，雪蜂山构造带从印支期开始发育由南东向北西的大规模的逆冲推覆构造，逆冲断层在近地表向南东陡倾，向下逐渐收敛于基底内的滑脱断层之上。基底新元古界板溪群及早古生界均卷人了推
覆构造，同时逆冲覆盖于中生代地层之上，形成厚皮构造，并造成了基底板溪群的大面积出露。关键词：雪峰山；厚皮构造：逆冲推覆构造；板溪群；基底；飞来峰；中生代
中图分类号：P542
文献标志码：A
文章编号：10008527(2011)06-102111
Structural Style and Deformational Characteristics of theThick-skinned
ThrustBeltintheWesternXuefengMountain
WANG Chang-liang', YAN Dan-ping'-2, ZHANG Bing", XU Yan-bo', TANG Shuang-li'
(1. Sehool of Earth Sriences and Resouroes, China Uninersity of Geovciences, Bejing100083, Chine:
2. State Key Loboratory of Grological Processes and Mineral Resouroes, China University of Geoxciences, Bejing100083, China)
Abstract: A thick-skinned thrust belt is located at the westerm edge of Xuefeng Mountain. The folds axis and faults are mainly NNE strike to the south portion of the thrust fault belt, and strike to NEE to the north. The basement of Proterozoic Banxi Group is occurred in large area of the thick-skinned thrust belt. While the reasons why the basement strata - Banxi Group occurred in Xuefeng Mountain and the structural styles of the Banxi Group are the key problems to analyze the Mesozoic tectonic of South China. In this paper, we focused and studied the geometry and kinematics of the thick-skinned thrust faults, and interpretation of the data of seismic section and magnetotelluric sounding along Fenghuang-Huaihua tectonic section, We recognized that the thick-skinned thrust faults were activated and moved from southeast to northwest during the Indosinian-Yanshanian aansa together and tum to a main basement fault. The sub back thrust faults are popularly scatered in the hanging wall. The basement of Banxi Group and Early Paleozoic strata are involved in the over thrust fault belt, known as the thick-skinned thrust, resulting into large occurrence of the besement of Banxi Group.
Key words: Xuefeng Mountain; thick-skinned thrust; over thrust fault belt; Banxi Group; basement; klippe; Mesozoic
收稿日期：2011-08-08；改回日期：2011-11-22；责任编辑：楼亚儿。
基金项目：国家白然科学基金项日（40872106，40921062）；高等学校学科创新引智计划项目（B07011）；中国石化前瞻性项目
(CPCC09 01)。
作者简介：汪昌亮，男，博士研究生，1980年出生，构造地质学专业，主要从事构造地质和矿产地质方面的研究。
Email; ehrang@ srk. cn