鄂西丹江口水库区域周边断裂构造解析及特征

林松; 唐启家; 李媛; 罗登贵; 廖武林; 王秋良

doi:10.3799/dqkx.2017.555

鄂西丹江口水库区域周边断裂构造解析及特征

doi: 10.3799/dqkx.2017.555

林松^1,2,3,,
唐启家^4,5, ,,
李媛^1,2,3,
罗登贵^1,2,3,
廖武林^1,2,
王秋良^1,2

1.
中国地震局地震研究所，湖北武汉 430071
2.
中国地震局地震大地测量重点实验室，湖北武汉 430071
3.
武汉地震工程研究院有限公司，湖北武汉 430071
4.
中国地质大学地球物理与空间信息学院，湖北武汉 430074
5.
中国地质大学地球内部多尺度成像湖北重点实验室，湖北武汉 430074

基金项目:

中国地震局社会公益研究项目 1521401800062

中央高校基本科研业务费专项资金 G1323531509

国家自然科学基金青年基金项目 41404039

详细信息

作者简介:
林松(1982-)，男，工程师，硕士，主要研究方向为工程地震、工程物探

通讯作者:
唐启家

中图分类号: P315
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- 被引次数: 0
出版历程
- 收稿日期: 2017-01-02
- 刊出日期: 2017-10-18

Analysis and Characteristics of Faults around Danjiangkou Reservoir, West Hubei Province

Lin Song^{1,2,3
,},
Tang Qijia^{4,5
, ,},
Li Yuan^1,2,3,
Luo Denggui^1,2,3,
Liao Wulin^1,2,
Wang Qiuliang^1,2

1.
Institute of Seismology, China Earthquake Administration, Wuhan 430071, China
2.
Key Laboratory of Earthquake Geodesy, China Earthquake Administration, Wuhan 430071, China
3.
Wuhan Institute of Earthquake Engineering Co. Ltd., Wuhan 430071, China
4.
Institute of Geophysics & Geomatics, China University of Geosciences, Wuhan 430074, China
5.
Hubei Key Laboratory of Subsurface Multi-Scale Imaging, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 鄂西地区位于中国大陆构造演化的关键节点上，地质构造十分复杂，而其中的丹江口水库区域更是我国南水北调工程的核心区域.在此处开展断裂构造研究对于深化南水北调工程的地震安全系统的建设具有重要意义.利用浅层地震反射波勘探技术对丹江口水库周边的3条主要断裂，即丹江、两郧和白河-谷城断裂进行分析，将各断裂内的断层构造进行地震剖面成像，得到了0~300 m深度范围内的断层结构特征.研究结果显示，3条断裂内的断层多为北东走向，丹江和白河-谷城断裂内的断层型态以正断层为主，但两郧断裂以逆断层为主，此特征可能与水库蓄水后，局部应力分布受到影响有关.研究成果不仅刻画出鄂西丹江口地区的断层形态，同时也对将来深入剖析此区域内背景应力及其周边构造单元之间的关系提供了重要的地震学参考资料.
- 丹江口 /
- 断裂构造 /
- 丹江断裂 /
- 两郧断裂 /
- 白河-谷城断裂 /
- 地震 /
- 工程地质
Abstract: West Hubei Province is located at an important point of the continental structure in China with complex geological structure, of which the Danjiangkou reservoir area is the core area of the South-to-North Water Diversion (SNWD) Project of China. An investigation of fault structure is important for the construction of seismic safety system of the SDWN Project. In this study, a shallow seismic-reflection technology to analyze 0 to 300 m structures of Danjian, Liangyun and Baihe-Gucheng fault zones around the Danjiangkou reservoir is used. The results show that most of fault, striking in the three fault zones are roughly in NE direction. Normal faults largely exist in the Danjiangkou and the Baihe-Gucheng fault zones. In contrast, Liangyun fault zone mainly consists of reverse faults. This fault distribution may be associated with the local stress imposed by the Danjiangkou reservoir. The results not only reveal fault characteristics of the Danjiangkou region but also provide important information of relationship between the background stress in this area and its surrounding tectonic unit for the future studies in seismology.
- Danjiangkou /
- fault structure /
- Danjiang fault /
- Liangyun fault /
- Baihe-Gucheng fault /
- earthquake /
- engineering geology

HTML全文

图 1 研究区域地质构造简图

F₁.丹江断裂；F₂.两郧断裂；F₃.白河-谷城断裂；Ⅰ.赵岗测线；Ⅱ.郧西盆地测线；Ⅲ.郧县盆地测线；Ⅳ.潭口水库测线；Ⅰ₁.中秦岭褶皱带；Ⅰ₂.南秦岭褶皱带；Ⅰ₃.南襄断陷；Ⅱ₁.上扬子台褶带；Ⅱ₂.鄂中褶断

Fig. 1. A diagram of geological structures in the study area

下载: 全尺寸图片幻灯片

图 2 丹江断裂浅层地震深度剖面及地质解译图(赵岗测线Ⅰ)

Fig. 2. Geological and fault structures in the Danjiang fault zone (Zhaogang arrat Ⅰ)

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图 3 丹江断裂赵岗Ⅰ测线钻孔联合剖面

Fig. 3. Combined borehole section in the Danjiang rupture zone(Zhaogang array Ⅰ)

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图 4 丹江断裂浅层地震深度剖面及地质解译图(赵岗测线Ⅱ)

Fig. 4. Geological and fault structures in the Danjiang rupture zone (Zhaogang array Ⅱ)

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图 5 两郧断裂浅层地震深度剖面及地质解译图(郧县盆地柳陂测线)

Fig. 5. Geological and fault structures in the Liangyun fault zone (Liubei part of Yunxian basin array)

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图 6 两郧断裂柳陂测线钻孔联合剖面

Fig. 6. Combined borehole section in the Liangyun fault zone (Liubei array)

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图 7 两郧断裂浅层地震深度剖面及地质解译图(郧县盆地张家槽测线)

Fig. 7. Geological and fault structures in the Liangyun fault zone (Zhangjiacao part of Yunxian basin array)

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图 8 两郧断裂-浅层地震深度剖面及地质解译图(郧西盆地四堰坪测线)

Fig. 8. Geological and fault structures in the Liangyun fault zone (Siyanping array in Yunxi basin)

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图 9 白河-谷城断裂浅层地震深度剖面及地质解译图(潭口水库测线)

Fig. 9. Geological and fault structures in the Baihe-Gucheng zone (Tankou reservoir array)

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表 1 研究区域地层系统划分

Table 1. The stratigraphic classfication in the study area

表 2 几种介质的物性参数

Table 2. Physical parameters of several media

介质名称	密度(g/cm³)	P波速度(m/s)
粉质粘土	1.4	450~800
砂砾石	2.0	500~1500
砾岩	1.5~2.4	1 500~3 500
粉砂岩	2.1~3.3	1 500~2 500
灰岩	2.3~3.3	2 500~6 000
花岗岩	26~2.75	4 500~6 500

下载: 导出CSV

表 3 研究区域内测线信息

Table 3. Data of measuring line in the study area

测线名称	测线起点位置坐标		测线终点位置坐标		测线长度 (m)
测线名称	纬度(°)	经度(°)	纬度(°)	经度(°)	测线长度 (m)
赵岗测线Ⅰ	32.54310	111.6624	32.53944	111.6613	446
赵岗测线Ⅱ	32.54064	111.6626	32.53080	111.6659	1 178
柳陂测线	32.82233	110.7521	32.82714	110.7607	1 012
张家槽测线	32.83897	110.7157	32.85303	110.7263	1 856
四堰坪测线	33.01753	110.4371	33.01537	110.4369	238
潭口水库测线	32.25109	111.4151	32.25437	111.4183	478

下载: 导出CSV

表 4 浅层反射结果统计

Table 4. Shallow reflection results

剖面名称	测线名称	断点位置(m)	推测断距(m)	断点埋深(m)	倾向	错断性质
丹江断裂	赵岗测线Ⅰ	120	10	12	南西	正断
		220	10	25	北东	正断
		280	10	20	北东	正断
	赵岗测线Ⅱ	295	5	30	北东	正断
		865	10	20	北东	正断
		1030	10	32	南西	正断
两郧断裂郧县盆地	柳陂测线	210	3	40	北东	逆断
	柳陂测线	565	3	20	北东	逆断
	张家槽测线	225	10	75	北东	逆断
		1080	10	50	南西	逆断
		1620	10	60	北东	逆断
两郧断裂郧西盆地	四堰坪测线	110	5	20	南西	逆断
两郧断裂郧西盆地	四堰坪测线	155	5	18	南西	逆断
白河-谷城断裂	潭口水库测线	210	3	20	北东	正断

下载: 导出CSV

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