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自80年代初国际岩石圈研究计划执行以来,地球科学研究重点开始从海洋转向大陆.90年代起乃至今后相当一段时间大陆动力学研究将成为地球科学最活跃的研究领域之一,从各种地球物理观测结果显示:地幔上部介质在横向、纵向上都存在着非均匀性,显然,密度是最基
Since the implementation of the international lithosphere research program in the early 1980s, the focus of earth science research has begun to shift from the ocean to the mainland. From the 90s to sometime in the future, continental dynamics research will become one of the most active research fields in earth science. Physical observations show that the media in the upper mantle is non-uniform in both horizontal and vertical directions, and obviously the density is the most basic