西北地质2024，Vol.57Issue(6)：290-299,10.DOI:10.12401/j.nwg.2024027
塔吉克斯坦南帕米尔阿里秋(Alichur)穹隆花岗岩锆石U-Pb定年、Hf同位素特征及地质意义
U-Pb Dating,Hf-isotopic Characteristics and Tectonic Implications of Granite,Alichur Dome,Southern Pamir,Tajikistan
摘要
Abstract
Cenozoic domes separated by detachments and formed during the India-Eurasian collision,are com-monly distributed in the southern Pamir.The core complex of these domes are made up of high-grade metamor-phic rocks and granite.The granite mainly formed during the Late Mesozoic and minor of them formed during the Cenozoic.The granite samples gathered along the detachments and from the granite comprising the bulk Alichur dome are measured by on the LA-MC-ICP U-Pb zircon dating.The formation times of the granite are(19.30±0.36)Ma and(111.7±0.8)Ma.Hf-isotopic characteristics of zircon demonstrate the granite formed by partial melting of crust.The Cenozoic granite is probably closely associated with the structural decompression caused by the extensional decollement of the domes.关键词
花岗岩/定年/帕米尔/塔吉克斯坦Key words
granite/dating/Pamir/Tajikistan分类
天文与地球科学引用本文复制引用
刘江,罗彦军,范堡程,Mustafo Gadoev..塔吉克斯坦南帕米尔阿里秋(Alichur)穹隆花岗岩锆石U-Pb定年、Hf同位素特征及地质意义[J].西北地质,2024,57(6):290-299,10.基金项目
中国地质调查局项目"丝绸之路境内段(新疆)资源环境承载能力监测评价项目"(DD20221731),第三次新疆综合科学考察项目"塔里木河流域关键区生态适宜性评估及绿色发展建议"(2022xjkk0305),国家重点研发计划项目课题"中亚成矿域战略性矿产信息及成矿规律"(2021YFC2901802)联合资助. （新疆）
