摘要
右江盆地是在南华加里东造山带夷平的基础上经再次裂陷形成的,它的形成与金沙江—红河—马江洋盆关系密切,是该洋盆与扬子板块之间的大陆边缘盆地。早泥盆世晚期—石炭纪随着金沙江—红河—马江洋盆的形成,扬子板块南部边缘开始裂陷,形成特殊的台地与台间海槽相间的大陆边缘裂谷盆地。二叠纪—早三叠世初期随着该洋盆的俯冲消减,形成越北岛弧,右江盆地进入弧后(裂陷)盆地阶段。早三叠世晚期以后,随着该洋盆的闭合和碰撞造山,在红河—马江造山带与扬子板块之间形成以复理石为特征的弧后前陆盆地。因此右江盆地经历了大陆边缘裂谷盆地(早泥盆世晚期—石炭纪)、弧后盆地(二叠纪—早三叠世早期)、弧后前陆盆地(早三叠世晚期—中三叠世)的构造演化阶段。
Youjiang Basin, a continental margin basin between Yangtze plate and Jinshajiang-Honghe-Majiang ocean, rifted on the base of South China Caledonian orogen. Along with the opening of JinshajiangHonghe-Majiang ocean a continental margin rift basin was formed in the Youjiang area from the late Early Devonian to Carboniferous , where the juxtaposition of carbonate platform and inter-platform rift trough is developed. The ocean crust subduction and northern Vietnam island arc formation resulted in the Youjiang back-arc basin from Permian to the early Early Triassic. Along with the ocean close and orogen formation Youjiang area formed a foreland basin between Yangtze block and the orogenic belts from the late Early Triassic to the Middle Triassic. In foreland basin flysch develops as typical foreland basin sediments. Hence, Youjiang Basin experienced tectonic stages from a continental margin rift（late Early Devonian to Carboniferous） to back-arc basin（Permian to the early Early Triassic）and foreland basin（late Early Triassic to Middle Triassic）.
出处
《地质科技情报》
CAS
CSCD
北大核心
2009年第6期10-15,共6页
Geological Science and Technology Information
基金
国家自然科学基金项目(40972078
40621002)
中国石油化工股份有限公司海相油气勘探前瞻性项目(G0800-06-ZS-319)
关键词
右江盆地
晚古生代
三叠纪
沉积盆地
大地构造
Youjiang Basin
Late Palaeozoic
Triassic
sedimentary basin
tectonics
