根据中央提出的关于“进行东海东部至琉球群岛外沿海域的海洋地质概查”的任务,为东海陆架划界问题和石油勘探工作,系统搜集必要的地形地质资料。由地质部海洋地质调查局和海洋地质研究所联合组队,借用《东方号》调查船,于一九八○年八月二十日至九月八日首次对冲绳海槽区进行了海洋地质调查。 According to the central task put forward by the central government on “carrying out the survey of marine geology from the east of the East China Sea to the waters off the Ryukyu Islands”, it systematically collected the necessary topographic and geological data for the demarcation of the East China Sea shelf and oil exploration. A joint team of the Bureau of Geological Survey Marine Geology and Institute of Marine Geology organized a survey of marine geology for the first time on the Okinawa Trough Area from August 20 to September 8, survey.