| 陡倾逆断层形成机制——以塔里木盆地色力布亚断层为例 |
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| 引用本文： | 李伟,陈书平,云金表,刘志娜,刘士林,季弘莹.陡倾逆断层形成机制——以塔里木盆地色力布亚断层为例[J].地质力学学报,2018,24(1):1-8. |
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| 作者姓名： | 李伟 陈书平 云金表 刘志娜 刘士林 季弘莹 |
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| 作者单位： | 1.中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249 |
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| 基金项目： | 中国石油化工股份有限公司石油勘探开发研究院项目（G5800-15-ZS-WX014）；国家自然科学基金项目（41572105） |
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| 摘 要： | 中国西部盆地多发育陡倾逆冲断层，但对其成因仍未取得统一认识。色力布亚断裂带位于塔里木盆地的西部，是一条典型的陡倾逆冲断层，为研究陡倾断层的成因提供了很好的实例。根据最新地震剖面与地层分析认为，色力布亚断裂上部倾角约为65°，经两期构造运动形成，第一期是加里东晚期运动-海西早期运动（362~439 Ma），第二期为喜马拉雅中期运动（5.3~23.3 Ma）；正是断层的多期活动形成了上部的陡倾断层，即先存缓倾逆断层的活动改变了局部应力场，使最大主应力轴由水平变倾斜，随之产生的库伦断裂倾角变陡，并伴生反冲逆断层。同时利用数字砂箱模拟结果验证了上述推断。
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| 关 键 词： | 色力布亚断裂 塔里木盆地 陡倾逆断层 数字砂箱 成因机制 |
| 收稿时间： | 2017/4/17 0:00:00 |
| 修稿时间： | 2018/1/17 0:00:00 |
FORMATION MECHANISM OF STEEPLY INCLINED REVERSE FAULT: TAKE THE SERIKBUYA FAULT IN TARIM BASIN AS AN EXAMPLE |
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| LI Wei,CHEN Shuping,YUN Jinbiao,LIU Zhin,LIU Shilin and JI Hongying.FORMATION MECHANISM OF STEEPLY INCLINED REVERSE FAULT: TAKE THE SERIKBUYA FAULT IN TARIM BASIN AS AN EXAMPLE[J].Journal of Geomechanics,2018,24(1):1-8. |
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| Authors: | LI Wei CHEN Shuping YUN Jinbiao LIU Zhin LIU Shilin and JI Hongying |
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| Institution: | 1.State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China2.College of Geosciences, China University of Petroleum, Beijing 102249, China3.Institute of Exploration and development, Sinopec, Beijing 100083, China |
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| Abstract: | Many steeply inclined reverse faults have developed in basins of western China, but we have not yet gained an unified understanding of their formation mechanism. The Serikbuya fault is located in the western Tarim Basin and it is a typical steeply inclined reverse fault, which provides a good example to study the formation mechanism of steeply inclined reverse fault. According to the latest seismic profiles and stratigraphic analysis, the inclination of the upper part of the Serikbuya fault is about 65°. The Serikbuya fault formed through two-staged tectonic movement. The first period ranged from Late Caledonian movement to early Hercynian movement(439~362 Ma), and the second period was during the Medium Himalayan movement(23.3~5.3 Ma). It is the multi-stage movements of the fault that formed the upper steeply inclined fault. That is, the movement of the previous gently inclined reverse fault changed the local stress field and promoted the maximum stress spindle from horizontal to tilt. Then the Coulomb fault inclination occurred steep and back thrusts appeared. At the same time, the results of digital sandbox simulation are used to confirm the above inferences. |
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| Keywords: | the Serikbuya fault Tarim Basin steeply inclined reverse fault digital sandbox formation mechanism |
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