北吕宋海槽深海滑坡沉积及其分布特征

李细兵; 李家彪; 吴自银; 李守军; 吴振利

北吕宋海槽深海滑坡沉积及其分布特征

1.
江苏省地震局, 江苏南京 210014; 国家海洋局第二海洋研究所海底科学国家海洋局重点实验室, 浙江杭州 310012
2.
国家海洋局第二海洋研究所海底科学国家海洋局重点实验室, 浙江杭州 310012

基金项目: 国家基础重点发展研究计划资助项目(2007CB411704);国家自然科学基金(40676024/D0603);国家海洋局第二海洋研究所科研业务专项(JG200803;JG0905)。

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出版历程
- 收稿日期: 2009-09-15

Deepwater landslide deposition and distribution characteristics in the northern Luzon Trough

1.
Sesmological Bureau of Jiangsu Province, Najiang 210014, China; Key Laboratory of State Oceanic Administration for Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
2.
Key Laboratory of State Oceanic Administration for Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China

摘要

摘要: 通过浅地层剖面和多波束地形资料的精细解释,在北吕宋海槽中部发现了一个规模约500 km²,平均厚20多米的海底滑坡沉积。通过对该滑坡体的物源及其沉积环境分析,将整个滑坡体沉积分为末端区和前缘区两个部分。从滑坡体与周围地层的叠置关系及火山弧喷发的历史来看,初步认为该海底滑坡是地震造成的。该滑坡体的发现对深化深水滑坡体的认识具有重要作用。
- 海底滑坡 /
- 重力流 /
- 浅地层剖面 /
- 深水区 /
- 北吕宋海槽中图分为号:P642.22文献标志码:A
Abstract: High-resolution bathymetry and subbottom profile data have been acquired in the northern Luzon Trough, a landslide extended on an area of 500 km², more than 20 m thick has been found in the middle trough. According to the analysis of landslide source and its sedimentary environment, the landslide is divided into two parts: an end area and a front area. From the relationship between the landslide area and the surrounding stratum and the history of the volcano eruption, it is suggested that the submarine landslide is triggered by the earthquake. Most submarine landslides occur in the depth range of 2 000 m, while the average depth of the study area is more than 3 000 m, thus the discovery of the submarine landslide is significant in deepening the research of the deepwater landslide.
- submarine landslide /
- gravity flow /
- deepwater area /
- northern Luzon Trough /

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参考文献(15)

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文章访问数: 1956
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PDF下载量: 1727
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