摘要
弧—盆体系中岛弧与弧后盆地相间并存是一大特色。本文以昌都地区三叠纪弧—盆格局为例 ,阐明了岛弧、弧后盆地与夹于其间的微陆块等地质特征 ;划分出 2个构造演化阶段 ,一是早中三叠世江达—阿中岛弧与弧后盆地的发育 ,二是晚三叠世滞后型岛弧与生达残留弧后盆地的形成 ,并揭示了其演化的动力学。
Island arcs and basins coexist alternately This is characteristic of an arc basin system Exemplified by arc basin framework in Qamdo region,this paper expounds geological features of island arc,back arc basin and microcontinents between them and divides their tectonic evolution into 2 stages,i.e Early Middle Triassic Jamda Azhong island arc and back arc basin stage and Late Triassic Lagging island arc and Sinda relict back arc basin stage and reveals their evolutionary geodynamics
出处
《四川地质学报》
2000年第3期176-182,共7页
Acta Geologica Sichuan
关键词
弧一盆体系
地质构造演化
微陆块
arc basin system,tectonic evolution,microcontinent
