%0 Journal Article
%T Zircon U-Pb Chronology and Geochemistry of Carboniferous Volcanic Rocks in Awulale Area, Western Tianshan Mountains<br>西天山阿吾拉勒石炭纪火山岩年代学和地球化学研究
%A LI Da-peng
%A DU Yang-song
%A PANG Zhen-shan
%A TU Qi-jun
%A ZHANG Yong-ping
%A GE Song-sheng
%A SHEN Li-jun
%A WANG Kai-hu
%A <br>李大鹏
%A 杜杨松
%A 庞振山
%A 涂其军
%A 张永平
%A 葛松胜
%A 沈立军
%A 王开虎
%J 地球学报
%D 2013
%I 
%X Carboniferous volcanic rocks are widespread in Awulale rift zone area. Geochemical data suggest that they belong to calc-alkalic series, and consist of basalt, trachybasalt, basaltic trachyandesite, basaltic andesite, trachyte and rhyolite. LA-ICP-MS zircon dating of the rocks yielded an isotopic age of (316.1±2.2) Ma, which represents the late Early Carboniferous. Their major and trace element geochemistry shows that these volcanic rocks are characterized by the enrichment of large ion lithophile elements, suggesting that they had a very intimate relationship with volcanic-arc rocks and probably resulted from the northward sudbuction of the Junggar Ocean beneath the Ili-Middle Tianshan Plate. They might have been formed from a partially melted (about 1%~5%) lithospheric mantle (probably spinel-lherzolite) source that had been enriched with subduction fluids, and experienced extensive fractional crystallization and crustal contamination before eruption.
%K Zircon LA-ICP-MS
%K geochemistry
%K volcanic arc
%K Dahalajunshan Formation
%K Awulale area<br>锆石LA-ICP-MS
%K 地球化学
%K 火山岛弧
%K 大哈拉军山组
%K 阿吾拉勒
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=1DF69A47DE80569EC8F859DF61571180&aid=BE7E4E47A19ED56FA376EE3C4EEB0F45&yid=FF7AA908D58E97FA&vid=339D79302DF62549&iid=0B39A22176CE99FB&sid=5BC9492E1D772407&eid=C29816B2656377A7&journal_id=1006-3021&journal_name=地球学报&referenced_num=0&reference_num=0