中国地质调查2016，Vol.3Issue(3)：38-46,9.
湖南1∶25万怀化幅区域地质调查主要成果及新认识
New understanding and achievements in regional geological survey of 1∶250 000 Huaihua sheet,Hunan province
摘要
Abstract
In this regional geological survey project,1∶250 000 Huaihua sheet is located in the southeastern mar-gin of the Yangtze block,and it is divided into four tectonic units from west to east:Wuling fault-bend fold belt, Yuanma basin,Xuefeng thrust belt and Shaoyang depression fold belt.Through investigation,the sedimentary re-lationship and its boundary between Banxi Group and Gaojian Group are found out in the study area.It is pro-posed that a depression formed in Chang’an stage of Nanhuan Period lies at the junction of Lianshao Basin and Xuefeng Mountain.The intrusive stages are divided,and the sequence of magmatic evolution is established.Com-bined with isotopic dating data,the intrusive ages and erupted ages of Baimashan-Longshan complex and its sur-rounding granites are ascertained.The tectonic deformation characteristics and tectonic patterns of Xuefeng oro-genic belt are identified;the formation and evolution process of Yuanma basin are established.关键词
扬子陆块/板溪群/雪峰造山带/沅麻盆地/湖南怀化Key words
Yangtze block/Banxi Group/Xuefeng orogenic zone/Yuanma basin/Huaihua,Hunan分类
天文与地球科学引用本文复制引用
李国亮,刘耀荣,柏道远,王先辉,何江南,凌跃新,杨俊..湖南1∶25万怀化幅区域地质调查主要成果及新认识[J].中国地质调查,2016,3(3):38-46,9.基金项目
中国地质调查局“湖南1∶25万怀化市、邵阳市幅区域地质调查（编号1212011120780）”项目资助。 （）
