南海北部神狐陆坡区灾害地质因素特征

马云; 李三忠; 夏真; 张丙坤; 王霄飞; 程世秀

doi:10.3799/dqkx.2014.119

南海北部神狐陆坡区灾害地质因素特征

doi: 10.3799/dqkx.2014.119

马云^{1, 2,},
李三忠^{1, 2, ,},
夏真³,
张丙坤^{1, 2},
王霄飞^{1, 2},
程世秀^{1, 2}

1.
中国海洋大学海底科学与探测技术教育部重点实验室, 山东青岛 266100
2.
中国海洋大学海洋地球科学学院, 山东青岛 266100
3.
广州海洋地质调查局, 广东广州 510760

基金项目:

中国地质调查局专项项目 GZH201100311-03-06

国家自然科学基金项目 41190072

详细信息

作者简介:
马云(1986-), 女, 山东临沂人, 博士研究生, 海洋地质专业.E-mail: honeysucle0539@126.com

通讯作者:
李三忠, E-mail: sanzhong@ouc.edu.cn

中图分类号: P694
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出版历程
- 收稿日期: 2014-03-07
- 刊出日期: 2014-09-01

Characteristics of Hazardous Geological Factors on Shenhu Continental Slope in the Northern South China Sea

Ma Yun^{1, 2
,},
Li Sanzhong^{1, 2
, ,},
Xia Zhen³,
Zhang Bingkun^{1, 2},
Wang Xiaofei^{1, 2},
Cheng Shixiu^{1, 2}

1.
Key Laboratory of Submarine Geosciences and Prospecting Techniques, Ministry of Education, Ocean University of China, Qingdao 266100, China
2.
College of Marine Geosciences, Ocean University of China, Qingdao 266100, China
3.
Guangzhou Marine Geological Survey, Guangzhou 510760, China

摘要

摘要: 南海北部神狐陆坡区富含海洋油气资源和天然气水合物, 其海底地质环境对于各项资源开采活动和工程建设尤为重要, 但目前专项研究较少.在大量二维地震资料解译的基础上, 结合浅地层剖面和多波束测深资料, 对该区海底地质环境进行整体研究, 识别出20种灾害地质因素.按照动力来源, 将该海域地质灾害归纳为构造应力、重力、水动力、气动力和土动力5大类灾害地质类型, 每种类型包含多种灾害地质因素.依据各灾害因素总体平面分布特征, 划分出埋藏三角洲密集区、海底滑坡密集区、火山密集区、软弱层密集区、浅断裂密集区和浅埋基岩面密集区6个灾害大区.还对主要灾害因素的地震反射特征和灾害性进行了研究, 为该区未来工程建设的顺利开展提供科学的参考.
- 南海 /
- 神狐陆坡 /
- 灾害 /
- 分类 /
- 反射特征
Abstract: Since Shenhu continental slope in the northern South China Sea is rich in oil and gas resources as well as natural gas hydrate, and its seabed stability is important for oil and gas exploitation and engineering projects. But special study on seabed stability here is far from being enough now. Based on interpretation of 2D seismic data, shallow profiles and multi-beam echo sounder data, this paper focuses on the whole geological environment of this area and identifies 20 different kinds of hazardous geological factors. According to the dynamic source, five hazard types are concluded as follows: tectonic stress-related, gravity-related, hydrodynamics-related, gas effusion-related and soil-related hazards. Each type includes multi-hazardous factors. According to the plan-view distribution of the hazardous geological factors, this area can be divided into the following six hazard regions: intensive areas of buried delta, submarine landslides, volcanism, weak layers, shallow fracture zone and shallow bedrock. Major hazardous factors and their seismic reflection characteristics are presented to provide scientific reference for development of future engineering projects in the study area.
- the South China Sea /
- Shenhu continental slope /
- hazards /
- classification /
- reflection characteristics

HTML全文

图 1 研究区范围(蓝色框)及本文所用测线

Fig. 1. Study area (blue box) and survey lines used in this paper

下载: 全尺寸图片幻灯片

图 2 南海北部及邻区地震震中和活动断裂分布

Fig. 2. Distribution of active faults and earthquakes in northern South China Sea and its neighboring area

下载: 全尺寸图片幻灯片

图 3 神狐陆坡区活动断裂典型地震反射特征(测线S₀, S₁₆, sh₁)

Fig. 3. Typical characteristics of seismic reflection of active faults on the Shenhu Continental Slope

下载: 全尺寸图片幻灯片

图 4 神狐陆坡区海底滑坡典型地震反射特征(测线S₃)

Fig. 4. Typical characteristics of seismic reflection of marine landslide on the Shenhu Continental Slope

下载: 全尺寸图片幻灯片

图 5 神狐陆坡区滑塌三角洲典型地震反射特征(测线S₁₄)

Fig. 5. Typical characteristics of seismic reflection of slumping delta on the Shenhu Continental Slope

下载: 全尺寸图片幻灯片

图 6 神狐陆坡区多期埋藏河道与埋藏谷典型地震反射特征

a.测线S₁₂；b.测线S₄；c.测线S₆

Fig. 6. Typical characteristics of seismic reflection of multi-stage buried channel and buried valley on the Shenhu Continental Slope

下载: 全尺寸图片幻灯片

图 7 神狐陆坡区大型峡谷典型地震反射特征(测线S₁₆)

Fig. 7. Typical characteristics of seismic reflection of large-scale valley on the Shenhu Continental Slope

下载: 全尺寸图片幻灯片

图 8 神狐陆坡区高压气囊(a)及含浅层气地层(b)典型地震反射特征

Fig. 8. Typical characteristics of seismic reflection of high-pressure gasbag (a) and Formation containing gas (b) on the Shenhu continental slope

下载: 全尺寸图片幻灯片

图 9 浅层埋藏基岩面与多级陡坎共生

a.测线S₅；b.测线S₄

Fig. 9. Multiple sharp steps and shallowly buried basement rocks

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表 1 神狐陆坡区灾害地质因素划分方案

Table 1. Classification of hazardous geology factors on Shenhu continental slope

灾害地质类型	灾害地质因素
构造应力	活动断裂、地震、火山、岩浆底辟、岩浆陡坎、断裂陡坎
重力	海底滑坡、崩塌、浊流、泥流、滑塌三角洲、滑坡陡坎
水动力	峡谷、侵蚀沟
气动力	浅层气、高压气囊
土动力	埋藏河道、埋藏三角洲、软弱层、浅埋基岩面

下载: 导出CSV

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