SHRIMP Zircon U-Pb Dating，Geochemistry，Sr-Nd-Hf Isotopic Analysis of the Yingqian Intrusion in Jiangxi Province，South China and Its Geological Significance

• 责任者：Guo Chunli (MLR Key Laboratory of Metallogeny and Mineral Assessment ; Insitute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Mao Jingwen
• 刊名：Acta Petrologica Sinica
• 出版年：2010
• 卷期：26(3)
• 关键词：黑云母花岗岩 ; biotite granite ; 花岗闪长岩 ; granodiorites
• 页码：p.919-937
• 图表：14 illus., 6 tables, 54 refs.
• 分类号：0801, 0600, 1300
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

The Yingqian intrusion is located in southern Jiangxi Province of the East Nanling region, and consists of granitoids of two periods of granitoids, mega-porphyritic granodiorites and fine-grained granites．SHRIMP zircon U-Pb dating indicates that the Yingqian intrusion is a Mid-Jurassic magmatic pluton．All of the rocks fall into the calc-alkaline category．LILE enrichment and HFSE depletion, and significantly negative Nb-Ta anomalies characterized the primitive mantle-normalized trace element spidergrams of the rocks．It indicates that the Yingqian intrusion were result of partial melting of ancient crustal materials，interacted with mantle-derived magmas．The Mid-Jurassic magmatism along the “Shi-Hang” belt formed in a continental crustal thinning setting，which is a favorable event of interaction between crustal and mantle．