摘要
阿瓦提-满加尔低梁是介于阿瓦提凹陷与满加尔凹陷之间一个特殊的隆起构造,其在东西向上表现为宽缓的隆起形态,而在南北方向上则为凹陷面貌。该区沉积盖层可分为下、中、上3个构造层。下构造层由震旦系—泥盆系构成,所谓阿-满低梁主要即发育于该构造层。上构造层由白垩系—第四系构成,构造形态为—北西倾斜坡。由石炭系—三叠系构成的中构造层则是上、下构造层构造形态的过渡,总体上仍呈北西倾。阿-满低梁自前震旦纪末塔里木运动以来经历了4大演化发展阶段:震旦纪—泥盆纪阿-满低梁形成发育阶段、石炭纪—三叠纪阿-满低梁改造阶段、侏罗纪—早第三纪北东倾斜坡发育阶段与晚第三纪—第四纪现今构造形成阶段。
The Awati-Manjiaer(or A-Man) low ridge of the Tarim basin is a special uplift between the Awati and Manjiaer depressions. In a west-east direction, it is a wide, gentle uplift, whereas a depression between the North Tarim and Central Tarim uplifts is in a south-north direction. Its sedimentary formations can be divided into lower, middle and upper structure layers. The lower structure layer consists of the Sinian to the Devonian, in which the A-Man low ridge is observed. The upper structure layer is composed of the Cretaceous to the Quaternary, which shows a large slope dipping northwestward. The middle layer of the Carboniferous to Triassic displays a transitional shape from the lower layer toward the upper. Since the Tarim movement at the end of the Pre-Sinian, the A-Man low ridge has experienced 4 major tectonic evolution stages: the stage of formation of the A-Man low ridge in the period of Sinian to Devonian, stage of reform of the A-Man low ridge in the period of Carboniferous to Triassic, stage of formation of a slope structure dipping northeastward in the period of the Jurassic to Paleogene, and that of the formation of the present structure in the period of the Neogene to Quaternary.
出处
《地质论评》
CAS
CSCD
北大核心
2002年第1期68-73,共6页
Geological Review
基金
国家"九五"重点科技攻关项目(编号99-111-03-01-05)
关键词
满加尔凹陷
阿瓦提凹陷
构造特征
构造演化史
塔里木盆地
隆起构造
Awati depression
Manjia'er depression
A-Man low ridge
structural features
tectonic evolution
the Tarim basin
