现代地质Issue(4)：738-746,9.
江南造山带东段皖南地区印支事件地质表象
Geological Phenomena of Indosinian Event in Southern Anhui, Eastern Jiangnan Orogenic Belt
摘要
Abstract
The Indosinian structural features in the adjacent regions of Anhui (Wan),Zhejiang (Zhe)and Jiangxi (Gan)in eastern Jiangnan Orogen were largely ignored due to the lack of directly structural age data. Based on regional geological information at scale of 1∶50,000 and field observation on southern Anhui,this study found and concluded some new evidences of Indosinian tectonic events in southern Anhui.Three-period distinct structural features have been identified in Liutang area of Xiuning in Anhui,and among which the angular unconformity between the Upper Triassic and the Lower Triassic belongs to the Indosinian event.The NE-trending fault developed in Lantian relict synclinal basin was formed during Indosinian,which experienced a process from slipping to collapse.The age of Triassic Dongkengkou quartz porphyry is about 245.2 Ma,impl-ying that the Early Indosinian event had caused a partial extension.In addition,the age of sericites in Sanyang-fault is (230.5 ±2.3)Ma(40 Ar-39 Ar),indicating that the Jinningian fault had been affected by Indosinian movement.Upon these findings,this study discussed the evolution process of Indosinian movement,and pro-vided important implications for understanding the Indosinian tectonic events of southern Anhui,even those of Wan-Zhe-Gan adjacent areas.关键词
印支期/断裂/皖南/江南造山带东段Key words
Indosinian/fault/southern Anhui/eastern Jiangnan Orogenic Belt分类
天文与地球科学引用本文复制引用
周术召,余心起,陈子微,刘秀..江南造山带东段皖南地区印支事件地质表象[J].现代地质,2015,(4):738-746,9.基金项目
国家自然科学基金项目（41272232）。 （）
