我国东海及邻近海域气体水合物可能的分布范围  

The Possible Distribution of Hydrate Gas in the Area of East China Sea and Its Vicinity

作　　者：栾锡武[1] 初凤友[1] 赵一阳[1] 秦蕴珊[1] 陈左林[2] 

机构地区：[1]中国科学院海洋研究所,山东青岛266071 [2]青岛海洋大学,山东青岛266003

出　　处：《沉积学报》2001年第2期315-319,共5页Acta Sedimentologica Sinica

基　　金：国家自然科学基金!(批准号 :40 0 0 60 0 4 );中国科学院院长基金资助

摘　　要：由气体水合物稳定存在的温度—压力条件 ,根据我国东海及其邻近海域的海底温度、地壳热流和地温梯度的分布 ,指出了该海区气体水合物可能的分布范围。主要在东海陆坡即冲绳海槽的西坡、冲绳海槽的东坡、和琉球海沟的西坡、琉球海沟和菲律宾海盆。分析指出 ,目前并不能肯定东海陆架区不存在气体水合物稳定存在的区域。由于冲绳海槽的热流值较高 ,特别是冲绳海槽的中部轴区 ,那里有较高的地温梯度 ,因而 。The area of East China Sea and its vicinity includes East China Sea Shelf,Okinawa Trough,Ryukyu Island,Ryukyu Trench and the west part of Philippine Sea.This is the famous zone of collision and subduction between an ocean block and a continental block.It is famous and attractive not only for its complex tectonic content but also for its abundant oil and gas resources.Since 1960s,the Institute of Oceanology,Chinese Academy of Sciences has conducted many geology and geophysics explorations in the area of East China Sea and its vicinity,such as seismic reflection explorations,seisic refraction explorations,heatflow measurements,sea floor temperature measurements and samplings.Recent years,scientists all over the world pay attention to the gas hydrate study in this area.This paper gives a brief introduction to what is gas hydrate and its steady state under a given temperature pressure condition.All the geological and geophysical data obtained in the explorations mentioned above has been carefully studied in the view of gas hydrate.Based on this data,the pressure and temperature was calculated along a profile which is perpendicular to the tectonic direction of Ryukyu T A Ba system down to several kilometers from the sea floor.Steady temperature pressure condition of the gas hydrate is also analyzed along this profile.The paper points out that the possible areas that the gas hydrate can be steadily exit mainly are the west slope of the East China Sea,the west part of Okinawa Trough,the east slope of Ryukyu Trench and Philippine basin.The paper points out that it can not say that there are area in the East China Sea basin that the hydrate gas can steadily exist.

关 键 词：东海 气体水合物 分布 中国 海底温度 地温梯度 冲绳海槽 

分 类 号：P744.4[天文地球—海洋科学] P736.21