论文部分内容阅读
前言冲绳近海海区的矿区面积约为38000平方公里。1972-1975年日本对该海区进行了基础调查(地震、重力)。在这些成果的基础上,1975年第一次在水深200米以内的海区进行了约1400公里地震调查,1977年在深水区再次进行了约3200公里地震补充调查(图1)。综合研究上述调查资料、地表调查资料及各种分析数据后,1976年钻探了冲绳近海1井。在这前后,还钻了天草近海1井、鹈户近
Foreword Okinawa offshore sea area of about 38,000 square kilometers of mining area. 1972-1975 Japan conducted a basic survey of the sea area (earthquake, gravity). Based on these achievements, for the first time in 1975, about 1,400 km of seismic surveys were conducted in the sea area within a depth of 200 meters. In 1977, about 3,200 km of additional earthquakes were conducted in Sham Shui Po (Figure 1). After a comprehensive study of the above survey data, surface survey data and various analytical data, Drilling 1 offshore Okinawa in 1976 was drilled. Around this time, also drilled Amakusa 1 offshore, Udo households near