Thermal Dome Metamorphism, Magmatism and Evolution of Wugong Mountain in Jiangxi Province
详细信息
- 责任者：Wang Xiaoying (Ganxi Geological Survey Brigade ; Jiangxi Bureau of Geology and Mineral Exploration and Development ; Nanchang 330030 ; China) ; Zeng Chao
- 刊名：Jilin Geology
- 出版年：2013
- 卷期：32(3)
- 关键词：变质带 ; metamorphic belts ; 岩浆作用 ; igneous processes ; 江西 ; Jiangxi Province
- 页码：p.12-18
- 图表：4 illus., 3 tables, 8 refs.
- 分类号：0802
- issnNo：ISSN1001-2427
- isbnNo：CN22-1099/P
摘要
Wugong Mountain thermal dome,which took the Caledonian composite granite as the center,NanhuaCambrian System formed metamorphic mineral zoning by regional metamorphism,and distributed surrounding rock mass,ductile-brittle fracture system formed outer rim since Mesozoic,which combined to form the domal structure.In the orogenic forepart(463.2±2.3Ma),the initial remelted magma and deep metamorphic rock formed tonalitic hybrid magma in situ,with the ascent of magma,silicon and aluminum components increases the acidity,transits to granodiorite magma,and generates mixed rock in rock mass edge.In the late orogenic stage(409.4±5.1Ma),evolved into normal granite,constituted the homologous magma composition evolution sequence,and accompanied obvious tectonic stress deformation.Compound superposition of extend magmatic action in Mesozoic,further strengthen the tectonic background of thermal dome,and fixed basic shape roughly at the end of Early Cretaceous.
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