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1 引言 西北太平洋以沿欧亚大陆边缘存在一些弧后盆地为特征,最广泛研究的盆地之一是日本和欧亚之间的日本海。解释日本海的起源和演化是一个有意义的科学课题。日本海的张开和在日本中部一条小的但明显的蛇绿岩带的出现被认为不仅在它们的地质时间表上而且在这个区的构造环境上相互有联系的(Arai等,1991)。 日本海的构造演化(图1)早已引起地球科学学者们的注意。日本海形成概况最早由Terada(1934)讨论过,他根据日本海的水深特征指出,此盆地是通过陆壳裂谷作用在日本陆块漂移出欧亚大陆(西伯利亚陆块)之后形成的,并在日本陆块之后遗留了作为残余陆地碎块的滩地和高地。此后,日本海和其周边的地区,即日本、朝鲜和俄罗斯的滨海,成为广泛地球科学研究的对象。很有系统的介绍这些课题最近已由大洋钻探计划调查组进行过(Tamaki等,1990,1992)。
1 Introduction The Northwest Pacific features some back-arc basins along the Eurasian margins, and one of the most widely studied basins is the Japan Sea between Japan and Eurasia. Explaining the origins and evolution of the Sea of Japan is a significant scientific issue. The opening of the Sea of Japan and the appearance of a small but distinct ophiolite belt in central Japan are thought to be linked to each other not only in their geological timetables but also in the tectonic setting of the area (Arai et al., 1991). The tectonic evolution of the Sea of Japan (Figure 1) has drawn the attention of Earth science scholars. The formation of the Sea of Japan was first discussed by Terada (1934), who based on the depths of the Sea of Japan indicated that the basin was formed after the continental blocks of Japan drifted out of the Eurasia (Siberia block) by continental crust rifting Behind the Japanese landmass was the remains of land and high ground as remnants of land fragments. Since then, the Sea of Japan and its surrounding areas, Japan, North Korea and Russia’s seaside, have become the object of a wide range of Earth science research. Very systematic presentation These topics were recently carried out by the OWDM (Tamaki et al., 1990, 1992).