| 西昆仑—塔里木盆地盆-山结合带的中、新生代变形构造及其动力学 |
| |
| 引用本文： | 崔军文,郭宪璞,丁孝忠,李朋武,张晓卫.西昆仑—塔里木盆地盆-山结合带的中、新生代变形构造及其动力学[J].地学前缘,2006,13(4):103-118. |
| |
| 作者姓名： | 崔军文 郭宪璞 丁孝忠 李朋武 张晓卫 |
| |
| 作者单位： | 中国地质科学院,地质研究所,北京,100037 |
| |
| 基金项目： | 国家自然科学基金;国土资源部科技专项基金;国土资源部重点实验室基金 |
| |
| 摘 要： | 西昆仑—塔里木盆地盆-山结合带可划分为西昆仑北带和塔里木地块南缘拗陷带(塔南拗陷带)两个构造单元,后者由塔西南拗陷带和塔东南断陷带两部分组成。西昆北带分别以库地—喀什塔什断裂和西昆北冲断裂与西昆中带和塔里木地块南缘拗陷带相隔。盆-山构造经历了长期、叠次的形成、演化过程,但不同时期、不同层次的变形构造具有极大的统一性,总体表现为以西昆中断裂(其主体为库地—喀什塔什断裂)为根带,以北向逆冲扩展作用为主导,向北至塔南拗陷带腹部,逐渐转化为以垂直向上的构造伸展作用为主导。塔南拗陷带的逆冲断裂与具强烈深层流变组构的西昆北逆冲断裂属统一地球动力学系统中不同构造层次的成分,前者是后者向浅层脆性应变域扩展的产物。导致盆-山构造形成的驱动力来自昆仑构造带以南的持续、强烈的北向逆冲扩展作用,至少在塔南拗陷带的前早更新统地层分布区不存在塔里木地块自北向南俯冲的直接证据。西昆仑—塔里木盆地南缘的造盆、造山作用过程可简单地归纳为三个形成演化阶段:晚侏罗世—早白垩世的快速隆升和快速拗陷(沉降)期、晚白垩世—古近纪的深层拆离-缓慢隆升和均匀拗陷(沉降)期和新近纪至今的挤压-急剧隆升和强烈拗陷(沉降)期。造盆、造山作用的动力学过程表明,中—上新世是造盆造山作用机制发生重大转折时期,早更新世末的构造运动基本上奠定了西昆仑—塔里木盆地南缘的盆-山构造格架。
|
| 关 键 词： | 盆山结合带 西昆北带 塔里木南缘拗陷带 中、新生代 变形构造 造盆、造山作用 |
| 文章编号： | 1005-2321（2006）04-0103-16 |
| 收稿时间： | 2006-02-16 |
| 修稿时间： | 2006-04-11 |
Mesozoic-Cenozoic deformation structures and their dynamics in the basin-range junction belt of the West Kunlun-Tarim basin |
| |
| CUI Jun-wen,GUO Xian-pu,DING Xiao-zhong,LI Peng-wu,ZHANG Xiao-wei.Mesozoic-Cenozoic deformation structures and their dynamics in the basin-range junction belt of the West Kunlun-Tarim basin[J].Earth Science Frontiers,2006,13(4):103-118. |
| |
| Authors: | CUI Jun-wen GUO Xian-pu DING Xiao-zhong LI Peng-wu ZHANG Xiao-wei |
| |
| Institution: | Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China |
| |
| Abstract: | The basin-range junction belt on the southern margin of the west Kunlun-Tarim basin can be divided into the northern West Kunlun belt and the southern Tarim depression belt. The latter consists of the southwestern Tarim depression and the southeastern Tarim fault depression. The northern West Kunlun belt is separated from the central West Kunlun belt and southern Tarim depression belt by the Küda-Kaxtax fault and by the northern West Kunlun thrust, respectively. The formation and evolution of the basin-range tectonics progressed through a lengthy and repeated process, but the types of deformation structures formed at different times and at different levels show much consistency. This process was generally manifested as follows: with the central West Kunlun fault (whose main part is the Küda-Kaxtax fault) as the root zone, the basin-range tectonics mainly experienced north-vergent thrust faulting towards the interior of the southern Tarim depression belt. This north-vergent thrusting was gradually transformed to mainly vertical tectonic extension. Thrusts in the southern Tarim depression belt and those in the northern West Kunlun belt are components at different tectonic levels in a unified geodynamic system; the former (brittle faults) were the product of propagation of the latter (ductile faults) toward shallow-level, brittle strain domains. The driving force for the formation of the basin-range tectonics was the continuous, strong north-verging thrust propagation coming from the south of the Kunlun tectonic belt. At present, no direct evidence of south-verging subduction of the Tarim block has been found, at least in areas of pre-early Pleistocene strata in the southern Tarim depression belt. The basin- and mountain-forming processes on the West Kunlun, the southern margin of Tarim basin simply comprise three stages: late Jurassic-early Cretaceous relatively strong and differential uplift and subsidence; late Cretaceous-Paleogene isostatic and slow uplift and subsidence; and Neogene-present strong and rapid uplift and subsidence. Basin-range tectonics of the Miocene-Pliocene were major transition periods for the basin- and mountain-forming mechanisms. Terminal early Pleistocene tectonic movements laid a foundation for the basin-and-range tectonic framework on the West Kunlun, the southern margin of Tarim basin. |
| |
| Keywords: | basin-range junction belt northern West Kunlun belt southern Tarim block marginal depression belt Meso-Cenozoic deformation structure basin- and mountain-forming processes |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
