| 中亚与中国西北地区陷落型前陆盆地的构造样式及成因分析 |
| 点此下载全文 |
| 引用本文：车自成,罗金海,刘良.1998.中亚与中国西北地区陷落型前陆盆地的构造样式及成因分析[J].地球学报,19(3):225-232. |
| DOI： |
| 摘要点击次数: 2981 |
| 全文下载次数: 2079 |
|
| 基金项目:中国石油气天然气总公司新区事业部资助 |
|
| 中文摘要:中亚与中国西北地区的多数中—新生代沉积盆地都表现为山前（指造山带或活动隆起带前缘）地带先行沉降，然后逐步向外扩展；早—中侏罗世沉降幅度最大，普遍形成未补偿的深湖—半深湖沉积，沉积范围遍及造山带，构成一准平原化的泛盆地沉积时期。盆地早期的构造样式均为半地堑式箕状凹陷，晚期均发生方式不同的的构造反转，形成全反转的逆冲推覆和半反转的正或逆反转构造。这些特征及区域构造背景共同说明，这一地区中—新生代盆地初始沉降不是起因于板块俯冲引发的挠曲作用，而是因造山带或活动隆起带前缘地带克拉通地块的重力陷落所引起，这样形成的盆地可称为陷落型前陆盆地。 |
| 中文关键词:西域地区（中亚与中国西北地区） 盆地构造样式 陷落型前陆盆地 反转构造 |
| |
| The Structural Styles and Genetic Analysis of Collapse-type Foreland Basins in Central Asia and Northwestern China |
|
|
| Abstract:Most Mesozoic-Cenozoic sedimentary basins in central Asia and northwestern China are different from those of continental margin area. Firstly they settle in the foreland (which means the front of orogenic belt or active uplift belt) and then extend outward gradually; They make the deepest subsidence in early- and middle-Jurassic so that widespread decompensated deep lake—subdeep lake sediments are formed and are even developed in orogenic belt, so this is a stage of peneplained plan-basin sedimentation; The structural styles of the basins in early stage are all half-graben depression and in late stage are total-reverse thrust nappe and semi-reverse normal- or abnormal-reverse structures. These features, together with regional tectonic setting, show that the initial subsidence of Mesozoic-Cenozoic basins in this area is not completely caused by the flexure due to plate subduction, but mainly by gravity-collapse of craton massif in the foreland. The basins formed in this way can be called collapse foreland basins. |
| keywords:central Asia and northwestern China collapse foreland basin reverse structure |
| 查看全文 查看/发表评论 下载PDF阅读器 |
