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北吕宋海槽深海滑坡沉积及其分布特征
Deepwater Landslide Deposition and Distribution Characteristics in the North Luzon Troug
投稿时间:2009-09-15??修订日期:2010-05-13
DOI:
中文关键词:??海底滑坡??重力流??浅地层剖面??深水区??北吕宋海槽
英文关键词:submarine landslide??gravity flow??deepwater area??North Luzon Trough
基金项目:国家重点基础研究发展计划(973计划)
作者单位E-mail
李细兵?国家海洋局第二海洋研究所?lixib_2005@sina.com?
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中文摘要:
??????本文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500km2,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。
英文摘要:
?????? High-resolution bathymetry and sub-bottom profile data have been acquired in the North Luzon Trough, a landslide extended over an area of 500km2, more than 20m 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: end area and front area. From the relationship between the landslide area and the surrounding stratum and the history of the volcano eruption, we suggest the submarine landslide is triggered by the earthquake. The average water depth of our research area is more than 3000 meters, thus the discovery of the submarine landslide is significant in deepening the research of deepwater landslide.
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