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日本国际岩石圈探查开发计划(简称DELP),现已正式开展了一年之久。1986年1月7、8两日,在东京大学召开了第一次DELP综合座谈会,这次座谈会作为计划性阶段曾重点考虑了“岩石圈计划与放射性年代测定”这一问题。
The Japan International Lithosphere Exploration and Development Program (DELP) has now been officially launched for a year. On January 7 and January 8, 1986, the first DELP comprehensive symposium was held at the University of Tokyo. This symposium focused on the “lithospheric dating and dating of radioactivity” as a planned phase.