Zircon U-Pb Age, Geochemistry Characteristics of Badaling Granitoid Complex and Their Geological Significance
详细信息
- 责任者：Jiao Shoutao (China University of Geosciences ; Beijing 100083 ; China) ; Yan Danping
- 刊名：Acta Petrologica Sinica
- 出版年：2013
- 卷期：29(3)
- 关键词：花岗岩 ; granite ; 铀—铅计时 ; U-Pb dating ; 北京 ; Beijing
- 页码：p.769-780
- 图表：illus., 2 tables, 64 refs.
- 分类号：0801
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
The Badaling granitoid complex is composed of different ages and types of plutons and is located in the northern margin of the North China Craton. In this study, three plutons, Huanghuacheng granite porphyry, Fenshuiling granite and Tieluzi monzonitic granite, are dated using LA-MC-ICP-MS zircon U/Pb technique and analyzed to obtain whole-rock compositions. The Tieluzi monzonitic granite pluton is dated to be 137±1.2Ma and belongs to adakite-like granite with Sr=312×10-6 (>300×10-6) and Yb=0.98×10-6 (<2.5×10-6). The Huanghuacheng granite porphyry body is dated to be 133±1.3Ma and belongs to Himalaya-type granite with Sr=193×10-6 (<300×10-6) and Yb=1.43×10-6 (<2×10-6). The Fenshuiling granite pluton is dated to be 128.5±1.2Ma and belongs to Nanling-type granite with very low Sr=10.2×10-6 (<100×10-6) and low Al2O3 (Al2O3=13.66%) and Yb=0.98×10-6 and very negative Eu anomalies (Eu/Eu*=0.32). The compositions of these plutons in different ages and different Sr, Yb signatures indicate that the northern East China plateau may have been uplifted before 137Ma and then started to collapse at 133Ma and ended at 130Ma.