首页 | 本学科首页   官方微博 | 高级检索  
     检索      

东海陆坡及相邻槽底天然气水合物的稳定域分析
引用本文:栾锡武,秦蕴珊,张训华,龚建明.东海陆坡及相邻槽底天然气水合物的稳定域分析[J].地球物理学报,2003,46(4):467-475.
作者姓名:栾锡武  秦蕴珊  张训华  龚建明
作者单位:1.中国科学院海洋研究所,青岛 266071 2 国土资源部青岛海洋地质研究所,青岛 266071
基金项目:科技部 973项目 (G2 0 0 0 0 4670 3 0 3 ),国家自然科学基金项目 ( 4 0 0 0 60 0 4) .
摘    要:利用实测的海底温度和海底热流资料对东海陆坡和冲绳海槽中轴以西的槽底地区的海底温度场和热流场进行了分析. 利用地震声纳浮标和OBS(Ocean Bottom Seismometer)资料将本研究区的地层划分为6层,自上而下地层的速度分别为1.8(1.8~2.2) km/s、2.2(2.0~2.5)km/s、2.8(2.7~3.2)km/s、3.4~3.6km/s、4.2(4.1~4.7)km/s、5.1km/s. 上部的1.8~2.2 km/s的速度层相当于第四纪的地层,2.8 km/s的速度层相当于上新世上部的地层,3.4~4.2 km/s的速度层相当于上新世下部的地层. 天然气水合物稳定域覆盖的面积从水深约500m的陆坡下缘到冲绳海槽的中轴部分约70000km2,相当于整个东海海域面积的十分之一. 稳定带的厚度从400m(研究区中部)到1100m(研究区北部和南部)不等. 适合水合物稳定赋存的地层主要是第四纪(1.8km/s、2.2km/s)和上新世的地层(2.8km/s). 根据热流、构造活动性和稳定带的厚度分析,研究区北部和南部更适合天然气水合物的稳定赋存.

关 键 词:东海陆坡  冲绳海槽  天然气水合物  稳定域  
文章编号:0001-5733(2003)04-0467-09
收稿时间:2002-4-16
修稿时间:2003-4-1

THE STABILITY ZONE OF GAS HYDRATE IN THE SLOPE OF EAST CHINA SEA AND NEIGHBORING TROUGH BASIN AREA
LUAN XIWU.THE STABILITY ZONE OF GAS HYDRATE IN THE SLOPE OF EAST CHINA SEA AND NEIGHBORING TROUGH BASIN AREA[J].Chinese Journal of Geophysics,2003,46(4):467-475.
Authors:LUAN XIWU
Institution:1.Institute of Oceanology, Chinese Academy of Sciences,Qingdao 266071,China 2 Qingdao Institute of Marine Geology,Qingdao 266071,China
Abstract:We analyze the distribution of temperature and heat flow of the sea floor sediment in the area of East China Sea slope and West basin area of the Okinawa Trough. Based on the Sonar Buoy and OBS data, 6 velocity layers are recognized, each of which has velocity of 1.8(1.8~2.2) km/s,2.2(2.0~2.5)km/s,2.8(2.7~3.2)km/s,3.4~3.6km/s,4.2(4.1~4.7)km/s and 5.1km/s,respectively.The upper velocity layer of 1.8~2.2 km/s corresponds to the Quaternary sediment stratum. The layer with velocity 3.4~4.2km/s is the Pliocene sediment stratum. The area that is suitable for stable existence of gas hydrate by the temperature and pressure is 70,000km2 about 1/10 the total area of East China Sea. The thickness of the stability zone ranges from 400m (Middle Part of Okinawa Trough) to 1100m (North and South Part of Okinawa Trough). The Quaternary and Pliocene layers are suitable for stable exitence of gas hydrate. According to the tectonic stability and heat flow, the north part and south part of the Okinawa Trough are the most perspective area for the gas hydrate explorations.
Keywords:East China sea slope  Okinawa trough  Gas hydrate  Stability zone
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《地球物理学报》浏览原始摘要信息
点击此处可从《地球物理学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号