Zircon Geochronology of Basement Rocks from the Bayan Obo Area, Inner Mongolia , and Tectonic Implications
详细信息
- 责任者：Fan Hongrui (Key Laboratory of Mineral Resources ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China) ; Yang Kuifeng
- 刊名：Acta Petrologica Sinica
- 出版年：2010
- 卷期：26(5)
- 关键词：杂岩 ; complexes ; 铀—铅计时 ; U-Pb dating ; 内蒙古 ; Inner Mongolia
- 页码：p.1342-1350
- 图表：illus., 4 tables, 27 refs.
- 分类号：0801
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Basement rocks at Bayan Obo, Inner Mongolia are composed of Neoarchean mylonitic granite-gneiss (2 588 ±15 Ma), Paleoproterozoic syenite and granodiorite (2 018 ± 15Ma), and biotite granite-gneiss & garnet-bearing granite-gneiss(～1 890 Ma). Giant Bayan Obo REE deposit is just located in the Archean North China craton. The collision orogeny movement of north margin of North China craton between 2.0 Ga and 1.9 Ga brought the swarm of diorite-granodiotite magma and intense regional peak metamorphism event.