| 库车再生前陆盆地冲断构造楔特征 |
| |
| 引用本文： | 卢华复,贾承造,贾东,陈楚铭,刘志宏,王国强,王胜利.库车再生前陆盆地冲断构造楔特征[J].高校地质学报,2001,7(3):257-271. |
| |
| 作者姓名： | 卢华复 贾承造 贾东 陈楚铭 刘志宏 王国强 王胜利 |
| |
| 作者单位： | 1. 南京大学地球科学系，南京 210093; 2. 塔里木石油勘探开发指挥部，库尔勒 841000 |
| |
| 基金项目： | “九五”国家自然科学基金重点项目 (批准号 49832 0 40 )，“九五”国家重点科技攻关项目 (96 - 111- 0 1- 0 1- 0 4)资助 |
| |
| 摘 要： | 库车再生前陆盆地冲断构造楔由一系列向南运动的逆冲断层和相关褶皱组成。冲断楔的北部以断层转折褶皱、断层传播褶皱、双重逆冲构造为主。断层楔的前缘发育了很好的滑脱膝折背斜，全为盲断层控制，形成隐蔽式前锋。冲断层的就位从中新世开始，自北向南迁移，前锋的构造形成在第四纪。造成逆冲断层的地壳水平缩短作用速度在中新世较慢，平均为0．355mm/a，上新世中期达0．82mm/a，而到上新世晚期和第四纪速度增大了约一个数量级，达到1．29－3mm/a。
|
| 关 键 词： | 库车再生前陆盆地 冲断构造楔 新生代构造 逆冲断层相关褶皱 背斜前翼生长三角 地壳缩短速度 |
| 文章编号： | 1006-7493(2001)03-257-15 |
| 收稿时间： | 2001-09-20 |
| 修稿时间： | 2000年3月30日 |
Features of the Thrust Wedge of Deformation Belt in Kuqa Rejuvenation Foreland Basin |
| |
| LU Hua fu ,JIA Chen zhao ,JIA Dong ,CHEN Chu ming ,LIU Zhi hong WANG Guo qing ,WANG Sheng li.Features of the Thrust Wedge of Deformation Belt in Kuqa Rejuvenation Foreland Basin[J].Geological Journal of China Universities,2001,7(3):257-271. |
| |
| Authors: | LU Hua fu JIA Chen zhao JIA Dong CHEN Chu ming LIU Zhi hong WANG Guo qing WANG Sheng li |
| |
| Institution: | 1.Department of Each Sciences, Nanjing University, Nanjing 210093; 2. CNPC Beijing l00000 |
| |
| Abstract: | Kuqa rejuvenation foreland basin and its thrust wedge of foreland deformation belts are structurally responsed to the India-Eurasia collision in the interior of Asia continent Based on the detailed surface geology reconnaissance and interpretations of many seismic profiles, we conclude that thrust wedge of deformation belt in Kuqa rejuvenation foreland basin is divided into five structural units, including the marginal thrust and hidden structural zone, the Shidike anticline zone, the North linear anticline zone, the Baicheng piggy-back depression and the Qiulitage thrust fronta1 zone．The fauult-related folds aye the basic deformation styles of the rejuvenation foreland thrust wedge, which are classified into nine kinds of fault-related folds, including fault-band fold, fault propagation fold, detachment kink fold, duplex, pop up, hybrid fault-bend/detachment fold, stacked anticline, composed wedge structure and superimposed fault-lend/fault-propagation fold In the northern part of the fiat/ramp thrust wedge, the fault-related folds are mainly of fault-bend folds, fault-propagation folds, and duplexes For the very front of the wedge there exist well developed blind thrusts and detachment kink folds, forming a typically cryptic thrust wedge front edge．Growth strata recorded accurately initial emplacement ages of every structure belt and detailed forming processes．Thrusts and thrust-related folds propagate from the north to
the south within the thrust wedge , i.e. Misibulake anticline initiated in the Miocene(23.3Ma), velocity of blind thrust 0.16mm/a; Kalabahe anticline and Kelasu anticline in 16.9Ma, velocity of hidden thrast 0.16mm/a and 0.16mm/a; Dawanqi anticline in 3.6Ma, velocity of hidden thrust 0.82mm/a: Dongqiulitage anticline in 3 Ma, velocity of blind thrust 1.3turn/a; and Yaken anticline in 1.87Ma, velocity of hidden thrust 3mm/a.The crustal shortening velocity which caused the thrusting is slow at about 0.355mm/a in average in the Miocene, then approaches O.82mm/a in middle Pliocene. During the late Pliocene and the Quaternary the velocity gets faster in about one magnitude order, up to 1.29-3mm/a, implicating that an accelerating crustal shorting process occurred in the late Cenozoic in the Kuqa thrust belt and approached a climax in the Pliocene and the Pleistocene. |
| |
| Keywords: | thrust wedge of Kuqa rejuvenation foreland basin Cenozoic structures thrust related fold growth triangle of front limb of anticline crustal shortening velocity |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《高校地质学报》浏览原始摘要信息 |
| 点击此处可从《高校地质学报》下载免费的PDF全文 |
|
