资源调查与环境Issue(3)：178-184,7.
下扬子天目山盆地火山岩锆石LA-ICP-MS定年及地质意义
Zircon LA-ICP MS dating of volcanic rocks from Tianmushan basin in the lower Yangtze region and its geological significances
摘要
Abstract
Tianmushan basin is a relatively well preserved Mesozoic volcanic basin in Jiangnan uplift of the Lower Yangtze region .The rock types of Mesozoic volcanic rock series are mainly rhyolite ,dacite and andesite from below .Zircon LA-ICP-MS U-Pb isotopic dating of the rhyolite and dacite from the lower part of Huangjian Formation gives ages of 133 .6 ± 1 .7 Ma (MSWD=0 .73) and 135 .0 ± 2 .1 Ma (MSWD=0 .78) ,respectively ,indicating that the age of volcanic rocks of the Huangjian Formation in the Tianmush-an basin is early Cretaceous .The starting time of volcanic eruption in the Tianmushan basin was consistent with those in volcanic basins in the middle-lower reaches of the Yangtze River ,suggesting that the Jiang-nan uplift and the middle-lower reaches of the Yangtze River were in a similar tectonic setting during early Cretaceous .关键词
火山岩/锆石LA-ICP MS定年/天目山盆地/下扬子Key words
volcanic rocks/zircon LA-ICP MS dating/Tianmushan basin/the Lower Yangtze region分类
天文与地球科学引用本文复制引用
王德恩,张元朔,高冉,李全忠,闫峻,胡顺利..下扬子天目山盆地火山岩锆石LA-ICP-MS定年及地质意义[J].资源调查与环境,2014,(3):178-184,7.基金项目
国家自然科学基金资助项目（编号41272074）的成果。 （）
