- 责任者：Yue Junpei (College of Earth Sciences ; Jilin University ; Changchun 130061 ; China) ; Sun Xiaomeng
- 刊名：Geotectonica et Metallogenia
- 出版年：2013
- 卷期：37(4)
- 关键词：构造 ; geological structure ; 构造分析 ; structural analysis ; 越南 ; Vietnam
- 页码：p.561-570
- 图表：2 illus., 2 tables, 55 refs.
- 分类号：0300
- issnNo：ISSN1001-1552
- isbnNo：CN44-1595/P
Rock association and regional unconformity are identified based on field survey and mapping for the stratigraphy, tectonics, metamorphic rock and igneous rocks in the Song Da zone, the northwestern Vietnam. Pre-Cenozoic in the Song Da zone is divided into three structural layers： （1） the Presinian crystalline basement, （2） the Cambrian-lower part of Upper Triassic, and （3） the upper part of Upper Triassic-Cretaceous. The Pre-Cenozoic structural successions of the Song Da zone show similar features with those of the Yangtze-South China plate： （1） In the Presinian, both of them have TTG complex and Khondalite series of similar ages and experienced similar tectonic evolution; （2） In the Cambrian-early Upper Triassic, the phosphorite and thick-layered limestone are comparable, and the Permian-Triassic basalt in the Song Da zone has genetic mechanism similar to that of the Emeishan basalt; （3） In the late Upper Triassic-Cretaceous, the volcanic-sedimentary faulted basins and thick continental red beds are comparable to those in East China. It can be concluded that the Song Da zone should have been part of the southwestern Yangtze-South China plate, and the boundary between the Yangtze-South China plate and Indochina plate is the Song Ma suture zone which contains ophiolite remnants. Tectonic settings of different structural layers indicate that the Song Da Zone experienced geological events such as the Columbia and Rodinia Supercontinent, sedimentation of the stable platform cover, closure of the Paleo-Tethys, and NW subduction of the Paleo-Pacific plate to the Eurasian plate. The Pre-Cenozoic basement of the Yinggehai Basin is the seaward extension of the Song Da zone, which shows similar tectonic features.