LA-ICP-MS Zircon U-Pb Dating and Tectonic Setting of Zhongchuan Intrusion, Lixian Area, Western Qinling Orogen
详细信息
- 责任者：Li Ting (Xi’an Center of Geological Survey ; China Geological Survey ; Xi’an 710054 ; China) ; Xu Xueyi
- 刊名：Geological Bulletin of China
- 出版年：2012
- 卷期：31（6）
- 关键词：黑云母花岗岩 ; biotite granite ; 秦岭 ; Qinling Mountains
- 页码：p.875-883
- 图表：6 illus., 2 tables, 36 refs.
- 分类号：0801
- issnNo：ISSN1671-2552
- isbnNo：CN11-4648/P
摘要
///Located in the middle of western Qinling orogen, the Zhongchuan intrusion is closely related to mineralization. The main intrusive body consists of biotite adamellite, which is generally considered to be formed in Indo-Chinese epoch. The results show that the intrusion belongs to high-K calc-alkaline series with high content of Na2O, K2O and low content of MgO. Chondrite-normalized REE patterns are characterized by strong LREE enrichment and variable degrees of negative Eu anomalies （δEu=0.60～0.67）. The ORG normalized trace element patterns show that the intrusion is enriched in LILE （K, Th, Rb） and depleted in HFSE （Ta, Nb, Y and Yb）.