U-Pb zircon geochronology, geochemistry and kinetics of the Huaniushan A-type granite in Northwest China

查看全文 作　　者：ZHU [1,2]Jiang;LÜ [1,2]Xinbiao;CAO [1,2]Xiaofeng;MO [1,2]Yalong;CHEN [1,2]Chao

机构地区：[1]Faculty of Earth Resources,China University of Geosciences,Wuhan 430074,China;[2]State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China

出　　处：《Chinese Journal Of Geochemistry》索引2012年第31卷第1期,共10页

基　　金：founded by the National Science and Technology Support Program,China(Grant No.2011BAB06B04-05) 摘　　要：The Huaniushan granite is located at the Beishan orogenic belt, northwestern China. At the contact zone between the granite and marble, a hydrothermal Pb-Zn and skarn Au deposit is formed. LA-ICP-MS zircon U-Pb dating yielded a weighted mean 206Pb/238U age of 229.5±2.6 Ma (MSDW=0.93) for the Huaniushan granite, imply-ing its Late Triassic intrusion. Geochemistry analyses show that the Huaniushan granite is enriched in Si, K, Na, and REE, and depleted in Mg and Ca, with contents of SiO2 (70.8% to 74.4%), Na2O+K2O (8.8% to 10.2%), CaO (0.93% to 1.44%), and MgO (0.14% to 0.48%). REE is characterized by obvious negative Eu anomaly. Rb, Th, U, K, Pb, Nb, Zr and Hf elements are rich in the granite while Ba, Sr, P, Ti and Eu are deplete. The granite has a high (Zr+Nb+Ce+Y) abundance and 104 Ga/Al ratios. Petrology, major and trace elements data all indicate that the Hua-niushan granite is A-type granite which intruded in a post-collisional extensional tectonic setting. The magma was dominantly sourced from partial melting of crustal intermediate-felsic igneous rocks. Intensive magmatic activities and Au-Cu-Mo mineralization occurred throughout the Beishan orogenic belt during the period from ca. 240 to 220 Ma. 关键词：A型花岗岩中国西北地区地球化学分析 U-PB年代学锆石U-Pb年龄动力学 LA-ICP-MS 牛

相关文献

参考文献（37）
引证文献（11）
耦合文献（1360）

参考文献(37)

引证文献(11)

耦合文献(1360)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

U-Pb zircon geochronology, geochemistry and kinetics of the Huaniushan A-type granite in Northwest China

参考文献(37)

引证文献(11)

耦合文献(1360)

用户提示