摘要
准噶尔盆地在早中石炭世由于上地幔上隆,使由泥盆系和石炭系组成的过渡性基底发生张裂,形成了堑垒式构造格局中雏形。应力释放后,在沉积物的重力作用下逐渐下沉,二叠纪是盆地发育的开始阶段,为分割性断陷发育期,中生代继续下沉、统一,进入断坳发育期与坳陷发育期。最后在中新世时萎缩上隆,形成了现代的准噶尔盆地。
The embryo of graben - horst - like tectonic framework of Junggar Basin was originaly formed by an uplift ofupper mantle during the time of the early- middle Carboniferous followed by a tension fault of the transitional base-ment for Devonian and Carboniferous systems. Its Permian, the stage of preliminary development of the basin, wasdown-faulted developing period. A period of fault/seg and depression occurred in Mesozoic with a continuous subsi-denoe. Finally, after contractive uplift in Miocene,Present Junggar Basin was formed in the end.
出处
《新疆石油地质》
CAS
CSCD
北大核心
1992年第3期192-196,共5页
Xinjiang Petroleum Geology
关键词
准噶尔盆地
形成
演化
断陷
坳陷
Junggar Basin
Formation
Evolution
Down faulting
Depression
