中国地质调查2016，Vol.3Issue(3)：21-28,8.
西昆仑上其汗地区火山岩LA－ICP－MS锆石U－Pb年龄及构造意义
Age and tectonic significance of LA-ICP-MS Zircon U-Pb of the Shangqihan volcanic rocks in West Kunlun
摘要
Abstract
The formation age of the Shangqihan volcanic rocks in West Kunlun has been under controversy for long time.LA-ICP-MS zircon U -Pb dating was used in this article to test the formation age of volcanic rocks. According to cathodeluminescence images of zircons,it have symmetrical oscillatory growth zonal structure.And most of the Th/U is over 0.4,referring to the characteristic of magmatic zircon.The results show zircons yield excellent concordant results with a weighted mean 206 Pb/238 U age of 335 ±4.2 Ma.Therefore,the formation age of the Shangqihan volcanic rocks belongs to Carboniferous period.Furthermore,the Shangqihan volcanic rocks are divided into Aqiangyan Formation.Combining with regional geologic background,we can reasonably conclude that the tectonic setting of the Shangqihan volcanic rocks are referred to rift environment.关键词
西昆仑/上其汗地区火山岩/LA-ICP-MS锆石U-Pb定年/构造意义Key words
West Kunlun/the Shangqihan volcanic rocks/LA -ICP -MS zircon U -Pb dating/tectonic significance分类
天文与地球科学引用本文复制引用
陈宁,王炬川,杨涛,仵桐,冯伟华,李琦,贺争峰,曾忠诚..西昆仑上其汗地区火山岩LA－ICP－MS锆石U－Pb年龄及构造意义[J].中国地质调查,2016,3(3):21-28,8.基金项目
中国地质调查局“新疆西昆仑1∶5万 J44E021019等5幅区域地质调查（编号1212011220635）”、“阿尔金地区1∶5万J45 E010020等6幅区域地质矿产调查（编号12120114081901）”项目联合资助。 （）
