Discovery of the Indosinian aluminum A-type granite in Zhejiang Province and its geological significance

查看全文 作　　者：LI [1,2]WanYou;MA [1,3]ChangQian;LIU [1]YuanYuan;Paul [1]T.ROBINSON

机构地区：[1]Faculty of Earth Sciences,China University of Geosciences,Wuhan 430074,China;[2]706 Geological Team,Guangdong Provincial Bureau of Geology,Shaoguan 512030,China;[3]State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China

出　　处：《Science China Earth Sciences》索引2012年第55卷第1期,共13页

基　　金：supported by Ministry of Science and Technology of China (Grant No. 2007DFA21230);Natural Science Foundation of Hubei Province (Grant No. 2009CDA004);National Natural Science Foundation of China (Grant Nos. 40821061, 40334037);Ministry Education of China, State Administration of Foreign Expert Affairs of China (Grant No. B07039);Survey and Assessment of Geology and Mineral Resources (Grant No. B[2010]AMR01-17-05) 摘　　要：Zircon LA-ICP-MS U-Pb dating of the Jingju syenogranites in the southwestern part of Zhejiang Province shows that these rocks were crystallized in the Late Triassic at 215±2 Ma, rather than in the Cretaceous as previously proposed. The Jingju syenogranites are characterized by relatively high K 2 O and FeO*, and low MgO. They have high concentrations of large ion lithophile elements (LIL) and LREE, such as K, Th, La, and Ce, but are depleted in high field strength elements (HFSE) such as Nb, Ta, and Ti. Their 10 4 Ga/Al ratios and (Zr+Nb+Ce+Y) contents are also high. These characteristics are similar to those of A-type granites. The syenogranites have high I Sr (0.7179-0.7203), low ε Nd (t) (from 14.2 to 13.2), and relatively old T 2DM ages, similar to those of the ancient metamorphic basement in the Cathaysia Block. It is suggested that the Jingju syenogranites were formed by partial melting of the Cathaysia basement rocks during tectonic extension. This identification of Indosinian A-type granite in Jingju has significant implications for understanding the early Mesozoic tectonic evolution of South China. 关键词：A型花岗岩浙江省地质意义 LA-ICP-MS U-PB年龄基底岩石构造演化高场强元素

相关文献

参考文献（27）
引证文献（24）
耦合文献（592）

参考文献(27)

引证文献(24)

耦合文献(592)

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

Discovery of the Indosinian aluminum A-type granite in Zhejiang Province and its geological significance

参考文献(27)

引证文献(24)

耦合文献(592)

用户提示