矿床地质2012，Vol.31Issue(1)：161-164,4.
内蒙古东部敖脑达坝铜-银-锡矿区附近发现晚石炭世地层
Discovery of Late Carboniferous Strata near Aonaodaba Cu-Ag-Sn deposit in eastern Inner Mongolia
摘要
Abstract
Most economically important medium- to large-sized Ag-polymetallic deposits occurring in south-central part of the Da Hinggan Mountains in east Inner Mongolia are hosted by Permian strata. The LA-MC-ICP-MS dating of zircons from tuffaceous slate outcropped in the western part of the Aonaodaba Cu-Ag-Sn deposit yielded an U-Pb age of (302.6 + 1.9) Ma with MSWD being 2.0, which indicates that the original rock of the tuffaceous slate was formed in late Carboniferous instead of in Permian considered by previous researchers. This new discovery is of great significance for re-understanding the regional geological evolution.关键词
地质学/二叠系/晚石炭世/LA-MC- ICP-MS锆石测年/敖脑达坝/内蒙古Key words
geology/Permian/Late Carboniferous/LA-MC-ICP-MS zircon dating/Aonaodaba/Inner Mongolia分类
天文与地球科学引用本文复制引用
江思宏,聂凤军,刘翼飞,侯万荣..内蒙古东部敖脑达坝铜-银-锡矿区附近发现晚石炭世地层[J].矿床地质,2012,31(1):161-164,4.基金项目
本文得到国家重点自然科学基金项目(41030421)、全国危机矿山项目(20089948)和地质大调查项目(1212010911029)联合资助 （41030421）
