地质与勘探2018，Vol.54Issue(2)：274-285,12.
新疆昭苏卡拉盖雷铜(金)矿床酸性火山岩锆石U-Pb年代学、地球化学及其地质意义
Zircon U-Pb Dating and Geochemistry of the Acid Volcanic Rocks from the Kalagailei Cu-Au Deposit in Zhaosu,Xinjiang,and its Geological Implications
摘要
Abstract
The Kalagailei copper-gold deposit which is mainly controlled by basalt,andesite,dacite and rhyolite is located in west part of the north side of the Central Tianshan tectonic belt in Zhaosu of Xinjiang Province. The LA-ICP-MS zircon U-Pb ages of rhyolite,andesite and felsite are between 451Ma and 437Ma belonging to Late Ordovician (It was preriously suggested that the volcanic rocks is Lower Carboniferous Dahalajunshan Formation). Geochemical analysis shows that the volcanic rocks are high in K2O(2.26%~9.27%) and Al2O3(11.77%~16.66%) and belong to a sub-alkaline se-ries. The rocks are enriched in LREE with negative Eu anomalies.In the spider diagram,they show enrichment in Ba,Tu and U,and depletion in Ta,Nb and Sr. Combined the regional tectonic settings with results of geochemical data,it is suggested that the volcanic rocks have a nature of continental arc and were probably generated by fractional crystallization in an extensional environment related to post-orogenic period.关键词
火山岩/大陆岛弧/锆石U-Pb年龄/地球化学/卡拉盖雷铜(金)矿床/昭苏/新疆Key words
volcanic rocks/continental arc/zircon U-Pb age/geochemistry/kalagailei Cu(Au)deposit/Zhaosu/Xinjiang分类
天文与地球科学引用本文复制引用
齐天骄,薛春纪,葛瑞涛,罗晖..新疆昭苏卡拉盖雷铜(金)矿床酸性火山岩锆石U-Pb年代学、地球化学及其地质意义[J].地质与勘探,2018,54(2):274-285,12.基金项目
国家重点研发计划(编号:2016YFC0600501)和国家自然科学基金项目(编号:U1303292、41430320)联合资助. （编号:2016YFC0600501）
