陡倾逆断层形成机制——以塔里木盆地色力布亚断层为例

李伟; 陈书平; 云金表; 刘志娜; 刘士林; 季弘莹

doi:10.12090/j.issn.1006-6616.2018.24.01.001

陡倾逆断层形成机制——以塔里木盆地色力布亚断层为例

doi: 10.12090/j.issn.1006-6616.2018.24.01.001

李伟^{1, 2,},
陈书平^{1, 2},
云金表³,
刘志娜^{1, 2},
刘士林³,
季弘莹^{1, 2}

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
2.
中国石油大学(北京)地球科学学院, 北京 102249
3.
中国石化石油勘探开发研究院西北勘探研究中心, 北京 100083

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

详细信息

作者简介:
李伟(1993-), 男, 硕士研究生, 构造地质学专业。E-mail:243283473@qq.com

中图分类号: P542
计量
- 文章访问数: 521
- HTML全文浏览量: 243
- PDF下载量: 13
- 被引次数: 0
出版历程
- 收稿日期: 2017-04-17
- 修回日期: 2018-01-17
- 刊出日期: 2018-02-01

FORMATION MECHANISM OF STEEPLY INCLINED REVERSE FAULT: TAKE THE SERIKBUYA FAULT IN TARIM BASIN AS AN EXAMPLE

LI Wei^{1, 2
,},
CHEN Shuping^{1, 2},
YUN Jinbiao³,
LIU Zhina^{1, 2},
LIU Shilin³,
JI Hongying^{1, 2}

1.
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
2.
College of Geosciences, China University of Petroleum, Beijing 102249, China
3.
Institute of Exploration and development, Sinopec, Beijing 100083, China

摘要

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。
- 色力布亚断裂 /
- 塔里木盆地 /
- 陡倾逆断层 /
- 数字砂箱 /
- 成因机制
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.
- the Serikbuya fault /
- Tarim Basin /
- steeply inclined reverse fault /
- digital sandbox /
- formation mechanism

HTML全文

图 1 色力布亚断裂位置图

Figure 1. Location map of the Serikbuya fault

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图 2 色力布亚断层时间剖面

Figure 2. Time profiles of the Serikbuya fault

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图 3 剖面BB'构造演化剖面(纵向长度拉伸1.5倍)

Figure 3. Tectonic evolution of section BB'(Note: The vertical length stretched 1.5 times)

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图 4 断层沿先存断裂复活力学分析图

Figure 4. Mechanical analysis of the fault re-activing along the pre-existing fault

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图 5 色力布亚反冲断层形成模式图

Figure 5. Formation model of Serikbuya back thrusts

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图 6 PFC计算循环模式图

Figure 6. PFC calculation cycle pattern

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图 7 数字砂箱模拟断展褶皱及速度矢量图

Figure 7. Fault-propagation folds and the velocity vectorssimulated by digital sandbox

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图 8 数字砂箱模拟色力布亚陡倾逆断层

Figure 8. The Serikbuya steep reverse fault simulated by digital sandbox

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