Geochemistry of Huheengeer Complex, Bayan Obo Region, Inner Mongolia and It’s Tectonic Implications
详细信息
- 责任者：Zhao Lei (Key Laboratory of Orogenic Belts and Crustal Evolution ; Ministry of Education ; Peking University ; Beijing 100871 ; China) ; Wu Tairan
- 刊名：Geological Journal of China Universities
- 出版年：2008
- 卷期：14(1)
- 关键词：橄榄岩 ; peridotites ; 闪长岩 ; diorites ; 内蒙古 ; Inner Mongolia
- 页码：p.29-38
- 图表：8 illus., 5 tables, 40 refs.
- 分类号：0801
- issnNo：ISSN1006-7493
- isbnNo：CN32-1440/P
摘要
Huheengeer mafic-ultramafic complex is found in Bayan Obo region, Inner Mongolia . Petrographically, the complex shows a concentric zoning in rock distribution: hornblende-peridotite, hornblende-gabbro and diorite from core to margin successively. Characteristics of structure and chemistry of the pluton suggest that the rocks were derived from a gabbroic-dioritic magma by crystal differentiation. According to the AlZ-TiO2, An-Mg, , Hf/3-Th-Ta and Hf/3-Th-Nb/16 diagrams, the Huheengeer complex is suggested to be generated at an active continental margin. All the combined information indicates that these plutons are mafic-ultramafic complex of peritotite-diorite type and they should be a record of Paleoasian Ocean plate subduction to the northern side of North China plate in the Permian.