西菲律宾海盆中央裂谷周缘地质灾害特征及诱发因素

基于2018年在西菲律宾海盆最新实测的高分辨率浅地层剖面和多波束测深数据，对西菲律宾海盆中部的中央裂谷及周缘区域的海洋地质灾害进行分析。在研究区总体识别出两大类灾害地质因素：（1）破坏性地质因素，主要包括滑坡、活动断层、冲刷沟谷和岩浆底辟；（2）限制性地质因素，以海山、陡坎、沟槽为主。利用浅地层剖面资料，精细刻画出灾害地质体的类型、形态、内部结构特征，并论述其分布区域、发育特点，探讨地质灾害产生的主要诱发因素及造成的不利影响。对研究区地质灾害的识别、分布范围的圈定和成因的分析，能够为海洋工程建设、装备预设和海上航行提供重要的地质依据，规避不利影响，提前做好风险预判。

Characteristics and inducing factors of geological hazards around the central rift in the West Philippine Basin

Based on the latest measured high-resolution shallow profile and multibeam bathymetric data in the West Philippine Basin in 2018, the marine geological disasters in the central rift and surrounding areas of the West Philippine Basin is analyzed in this paper. In the study area, two types of disaster geological factors are identified: one is destructive geological factors, mainly including landslide, active fault, gully and magma diapir; the second is the restrictive geological factors, mainly seamounts, scarps and trenches. Based on the shallow seismic profile, the type, shape and internal structure characteristics of geological hazards bodies are described in detail. The distribution area and development characteristics are discussed. The main inducing factors and adverse effects of geological hazards are discussed. The identification of geological hazards, the delineation of distribution range and the analysis of causes in the study area can provide important geological basis for marine engineering construction, equipment design and maritime navigation, avoid adverse effects and make risk prediction in advance.