西北地质2017，Vol.50Issue(4)：1-8,8.
西天山昭苏阿登套地区大哈拉军山组火山岩LA-ICP-MS锆石U-Pb年龄及其意义
Ziron U-Pb Dating of Volcanic Rocks from Dahalajunshan Formation in Adengtao Area of Zhaosu County, West Tianshan and its Geological Implications
摘要
Abstract
Dahalajunshan Formation volcanic-sedimentary rocks are widespread in Adengtao area of Zhaosu County,West Tianshan,and there is great disparity in its age identification.The volcanic rocks in the Dahalajunshan Formation of Adengtao area are composed of basalt,andesite,dacite,rhyolite and series of relevantpurple,grey,mauve volcaniclastic rocks.Zircon LA-ICP-MS dating has been used to determine the formation ageofrhyolitic volcanic breccia.The results showthat the age of zircon was (344.4±-6.1) Ma.Combining with the CL image features of zircons as well as the geological data,the following conclusionshave been reached:the Dahalajunshan Formation was formed not later than early Carboniferous in Adengtao area,West Tianshan.The findings has accurately constrained the period of volcanic strata inthis area,which provides new chronological evidence for volcanic magmatism and tectonic evolution of West Tianshan.关键词
LA-ICP-MS锆石U-Pb定年/大哈拉军山组/昭苏阿登套地区/西天山Key words
zircon LA-ICP-MS U-Pb dating/Dahalajunshan Formation/Adengtao area in Zhaosu County/West Tianshan分类
天文与地球科学引用本文复制引用
周煜杰,李永军,杨高学,林广春,王祚鹏,李甘雨..西天山昭苏阿登套地区大哈拉军山组火山岩LA-ICP-MS锆石U-Pb年龄及其意义[J].西北地质,2017,50(4):1-8,8.基金项目
中国地质调查局“新疆昭苏县-特克斯县乌尊布拉克一带1∶5万三幅区域地质调查”(T16-1-LQ02) （T16-1-LQ02）
