| 塔里木盆地南部玛东早古生代褶皱-冲断带 |
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| 引用本文： | 杨海军,李曰俊,李勇,陈才,曾昌民,文磊,师骏,张强.塔里木盆地南部玛东早古生代褶皱-冲断带[J].岩石学报,2016,32(3):815-824. |
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| 作者姓名： | 杨海军 李曰俊 李勇 陈才 曾昌民 文磊 师骏 张强 |
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| 作者单位： | 中国石油塔里木油田分公司, 库尔勒 841000,中国科学院地质与地球物理研究所, 北京 100029,中国石油塔里木油田分公司, 库尔勒 841000,中国石油塔里木油田分公司, 库尔勒 841000,中国石油塔里木油田分公司, 库尔勒 841000,中国科学院地质与地球物理研究所, 北京 100029,中国石油塔里木油田分公司, 库尔勒 841000,中国科学院地质与地球物理研究所, 北京 100029 |
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| 基金项目： | 本文受国家科技重大专项(2011ZX05028-003、2011ZX05003-004)资助. |
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| 摘 要： | 玛东褶皱-冲断带位于塔里木盆地南部,走向NE-SW,由NW向SE方向冲断。褶皱冲断带发育于寒武-奥陶系,以中寒武统膏-盐层为主滑脱面。中志留统及其以上地层不整合于褶皱冲断带之上。它是世界上保存最好的早古生代褶皱冲断带之一。根据卷入变形最新地层、不整合于褶皱-冲断带之上的最老地层和上奥陶统上部的生长地层,玛东褶皱-冲断带的变形时间为晚奥陶世-早志留世。玛东褶皱-冲断带与其东南侧的塘南褶皱-冲断带同为塔里木盆地南缘早古生代前陆褶皱-冲断带的组成部分,塘南褶皱-冲断带是该早古生代前陆褶皱-冲断带主体的残余,其向NW的主冲断方向代表该前陆褶皱-冲断带的主冲断方向;玛东褶皱-冲断带是该早古生代前陆褶皱-冲断带的前锋,其向SE的冲断具有反冲性质。它们是昆仑早古生代造山作用的重要记录,也是昆仑早古生代碰撞造山带的组成部分,现今保存最好的部分。
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| 关 键 词： | 玛东褶皱-冲断带 塘南褶皱-冲断带 早古生代(前陆)褶皱冲断带 晚奥陶世-早志留世 塔里木盆地南部 昆仑造山带 |
| 收稿时间： | 8/4/2015 12:00:00 AM |
| 修稿时间： | 2015/12/10 0:00:00 |
Madong Early Paleozoic fold-thrust belt in the southern Tarim Basin. |
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| YANG HaiJun,LI YueJun,LI Yong,CHEN Cai,ZENG ChangMin,WEN Lei,SHI Jun and ZHANG Qiang.Madong Early Paleozoic fold-thrust belt in the southern Tarim Basin.[J].Acta Petrologica Sinica,2016,32(3):815-824. |
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| Authors: | YANG HaiJun LI YueJun LI Yong CHEN Cai ZENG ChangMin WEN Lei SHI Jun and ZHANG Qiang |
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| Institution: | Tarim Oilfield Company, PetroChina, Korla 841000, China,Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China,Tarim Oilfield Company, PetroChina, Korla 841000, China,Tarim Oilfield Company, PetroChina, Korla 841000, China,Tarim Oilfield Company, PetroChina, Korla 841000, China,Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China,Tarim Oilfield Company, PetroChina, Korla 841000, China and Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | Madong fold-thrust belt, strike NE-SW and thrust southeastward, is located in the southern Tarim Basin. It is one of the best preserved Early Paleozoic fold-thrust belts in the world, with the fold-thrust structure developed in Cambrian and Ordovician strata, the Middle Cambrian gypsum-salt layer as the main décollement surface, the Middle Silurian and the above strata unconformably overlie the fold-thrust belt. According to the youngest strata involved in fold-thrust structure, the oldest strata covered on the fold-thrust belt and the growth strata of the upper part of the Upper Ordovician, we inferred that the deformation time of Madong fold-thrust belt was Late Ordovician-Early Silurian. Madong fold-thrust belt and Tangnan fold-thrust belt in the southeast side both are part of the Kunlun(southern margin of Tarim Basin) Early Paleozoic foreland fold-thrust belt:Tangnan fold-thrust belt is the residual of the foreland fold-thrust belt, with its thrust direction northwestward on behalf of the main thrust direction of the foreland fold-thrust belt; Madong fold-thrust belt is the front of the foreland fold-thrust belt, with its thrust direction southeastward as the back-thrust direction of the foreland fold-thrust belt. They are both important records of Kunlun Early Paleozoic Orogeny, and the best preserved part of the Kunlun Early Paleozoic collisional orogenic belt. |
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| Keywords: | Madong fold-thrust belt Tangnan fold-thrust belt Early Paleozoic(foreland) fold-thrust belt Late Ordovician-Early Silurian Southern Tarim Basin Kunlun orogenic belt |
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