ISSN 1006-3021 CN11-3474/P
Published bimonthly started in 1979
西准噶尔拉巴岩体的成因——来自岩石学、年代学和地球化学的证据
  
关键词:geochemistry  U-Pb dating  Sr-Nd-Hf isotopic composition  limited oceanic basin  West Junggar
基金项目:中国地质调查局地质调查项目(编号: DD20160083; DD20190011; DD20221643);国家重点研发计划项目(编号: 2018YFC0603700);中国地质科学院基本科研业务费项目(编号: JKY202011)
作者单位E-mail
徐盛林 中国地质科学院 xushenglindizhi@163.com 
陈宣华 中国地质科学院  
马飞宙 中国地质调查局 61817897@qq.com 
邵兆刚 中国地质科学院  
丁伟翠 中国地质科学院  
韩乐乐 中国地质科学院
中国地质大学(北京)地球科学与资源学院 
 
王叶 中国地质科学院  
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摘要:
Petrogenesis of Laba Plutons in West Junggar, Central Asian Orogenic Belt: Evidence from Petrology, Chronology, and Geochemistry
      The Laba plutons in southwest West Junggar were formed in the Early Permian (285.7~295.1 Ma). They are composed of granite, granodiorite, monzogranite batholith, and a series of granodiorite porphyry, diorite, granite, and other dikes. Minerals mainly consist of quartz, plagioclase, alkali feldspar, hornblende, and biotite. The Laba plutons are characterized by medium-high silicon, calc-alkaline, mafic, and peraluminous with high CaO and Na2O content, Eu weak negative anomaly, high εNd, and low (87Sr/86Sr)i. They are typical I-Type granites formed in the island arc environment of oceanic crust subduction, which can be further divided into high-pressure adakite with high Sr and low Yb content and low-pressure island arc granite with low Sr and high Yb content. In the Early Permian, there may still have been a limited ocean basin in West Junggar, which is of great significance to improvement of the regional tectonic evolution.
XU Sheng-lin,CHEN Xuan-hua,MA Fei-zhou,SHAO Zhao-gang,DING Wei-cui,HAN Le-le,WANG Ye.2022.Petrogenesis of Laba Plutons in West Junggar, Central Asian Orogenic Belt: Evidence from Petrology, Chronology, and Geochemistry[J].Acta Geoscientica Sinica,43(6):875-894.
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