CAJ | 학술논문

经过对"探宝号"调查船在2001年8月在南海东北部陆坡及台湾南部恒春海脊海域采集的多道地震剖面资料进行的地震反射波数据分析、研究和解释,结果表明:(1)南海东北部陆坡段区域和台湾南部恒春海脊海域地震剖面上均显示有被作为天然气水合物存在标志的BSR,但两区域构造成因、形式和相关地质环境的不同造成了此两处的天然气水合物成因及过程的不同.(2)南海东北部陆坡区域的水合物形成与该区广泛发育的断裂带、滑塌构造体及其所形成的压力场屏蔽环境有关,而台湾南部恒春海脊海域的天然气水合物的形成则与马尼拉海沟俯冲带相关的逆冲推覆构造、增生楔等及其所对应的海底流体疏导体系有关.(3)南海陆缘区域广泛发育有各种断裂带、滑塌构造体、泥底辟、俯冲带、增生楔等,且温压环境合适,是天然气水合物矿藏极有可能广泛分布的区域.
경과대"탐보호"조사선재2001년8월재남해동북부륙파급태만남부항춘해척해역채집적다도지진부면자료진행적지진반사파수거분석、연구화해석,결과표명:(1)남해동북부륙파단구역화태만남부항춘해척해역지진부면상균현시유피작위천연기수합물존재표지적BSR,단량구역구조성인、형식화상관지질배경적불동조성료차량처적천연기수합물성인급과정적불동.(2)남해동북부륙파구역적수합물형성여해구엄범발육적단렬대、활탑구조체급기소형성적압력장병폐배경유관,이태만남부항춘해척해역적천연기수합물적형성칙여마니랍해구부충대상관적역충추복구조、증생설등급기소대응적해저류체소도체계유관.(3)남해륙연구역엄범발육유각충단렬대、활탑구조체、니저벽、부충대、증생설등,차온압배경합괄,시천연기수합물광장겁유가능엄범분포적구역.
By analyzing and interpreting the newly acquired seismic profile supported by the national 973 Program and synthesizing the data with other geologic & geographic information, we draw conclusions as follows. a) Two seismic reflections located at the northeast South China Sea (SCS) slope and the Hengchun ridge are the Bottom Simulated Reflections (BSRs). Yet, the genesis and process of the gas hydrate in these two areas are different because of different regional tectonics and geological environments; b) The genesis of gas hydrate located at the northeast SCS slope area is related to the broadly existing fracture zones, slumping tectosomes, and the distinctive shielding environment of pressure masking field formed by them. But the genesis of the gas hydrate at the Hengchun ridge is associated with the thrust nappe structures and accretionary wedges formed along the Manila subduction zone and the related sub-floor fluid channel system built by them; c) Since the analogous geologic bodies are broadly distributed at slope areas around SCS and the temperature-press environment is very suitable to the formation and conservation of the gas hydrate, we suggest that much more of this resource should be stored in these areas.