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1984年夏季,作为日本岩石圈研究计划(DELP)的一部分,在冲绳海槽中部地区进行了两次航海研究,我们认为该地区处于弧后海盆形成的初期阶段。这些航海研究由DELP-84 WAKASHIO航行和东京大学TANSEI号船的KT84-14航行组成。取得的主要成果在以后的四篇文章中叙述(见原文Ⅱ—Ⅴ)。
In the summer of 1984, two sailing studies were conducted in the central part of the Okinawa Trough as part of the Japan Lithosphere Research Project (DELP), which we believe is in the early stages of the formation of a back-arc basin. These sailing studies consisted of the DELP-84 WAKASHIO voyage and the KT84-14 voyages of the TANSEI vessel at the University of Tokyo. The main achievements made are described in the following four articles (see the original II-V).