台湾西南海域似海底反射分析

英文篇名：AN ANALYSIS ON BOTTOM SIMULATING REFLECTORS IN SOUTHWEST TAIWAN SEA AREA
中文刊名：热带海洋学报
英文刊名：Journal of Tropical Oceanography
作者：邓辉 ; 阎贫 ; 刘海龄
英文作者：DENG Hui~(1 ; 2) ; YAN Pin~(1 ; 3) ; LIU Hai-ling~1(1.Key Lab. of Marginal Sea Geology ; South China Sea Institute of Oceanology & Guangzhou Institute of Geochemistry ; CAS ; Guangzhou 510301 ; China ; 2. Guangzhou Institute of Geochemistry ; CAS ; Guangzhou 510640 ; China ; 3. Guangzhou Center for Gas Hydrate Research ; CAS ; Guangzhou 510640 ; China)
中文关键词：天然气水合物 ; 似海底反射层 ; 增生楔 ; 台湾西南海域
英文关键词：gas hydrate ; bottom simulating reflector ; accretionary sedimentary prism ; southwest Taiwan sea area
出版日期：2005-03-30
机构：中国科学院南海海洋研究所与广州地球化学研究所边缘海地质重点实验室,中国科学院南海海洋研究所与广州地球化学研究所边缘海地质重点实验室,中国科学院南海海洋研究所与广州地球化学研究所边缘海地质重点实验室广东广州510301中国科学院广州地球化学研究所,广东广州510640 ,广东广州510301中国科学院广州天然气水合物研究中心,广东广州510640 ,广东广州510301
年：2005
期：02
出版单位：热带海洋学报

摘要

台湾西南海域弧陆碰撞及俯冲作用形成增生楔,在增生楔部位地震调查原始炮集数据上可清楚地识别BSR极性及波形特征。通过对该区域地震调查数据处理,获得了常规地震偏移、瞬时振幅及瞬时相位3种属性剖面,三者可清楚地反映BSR特征及分布,瞬时相位剖面还反映了BSR之上弱反射层的结构特征。研究表明,增生楔部位构造沉积明显控制BSR的形成与分布,该区天然气水合物成矿前景良好。
An accretionary sedimentary prism has been formed due to arc-continent collision and plate subduction in the southwest Taiwan sea area. In the accretionary sedimentary prism the waveform and polarity characters of bottom simulating reflectors (BSR) can be seen clearly in the raw seismic survey data of shot gathers. The thickness of the accretionary prism is more than 6000m, with high terrigenous organic debris and high potential for gas hydrate formation. The water depth in this area varies from 900 to 2250m and is suitable for gas hydrate formation considering the temperature and pressure conditions. The conventional migration, instantaneous amplitude and instantaneous phase profiles were obtained through seismic processing. These profiles reflect characters and distributions of BSR clearly. The instantaneous phase profile also exhibits a weak reflection structure above BSR. The results show that BSR is clearly controlled by tectono-sedimentation in the accretionary prism, and this area has bright prospects in gas hydrate.

引文

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