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本文分析了青藏高原及其邻区大量近期地震的震源深度分布资料,发现中源地震不仅分布在众所周知的兴都库什和印缅山弧一带,而且在印度洋板块与欧亚板块汇聚带印度河—雅鲁藏布江以南,以及欧亚板块内部的帕米尔、西昆仑、柴达木和天山南缘一带也有中源地震分布,它们构成了这一地区三条向南倾斜的震源带。 这些中源地震震源带的存在表明,向北运动的印度次大陆与亚洲大陆碰撞以后,印度次大陆北缘本身并没有消减,而是迫使亚洲大陆通过三条向南倾斜的岩石层消减带产生了大规模的消减作用。 中源地震在平面上分布的不连续性,揭示了这一地区的许多条走滑断层的现代活动。这些走滑断层的巨大位移显示了青藏高原内部各块体之间的横向运动也是很可观的。 最后,提出了亚洲大陆多条南倾消减带的形成和发展模式。
This paper analyzes the focal depth distribution data of a large number of recent earthquakes in the Qinghai-Xizang Plateau and its adjacent areas. It is found that the Zhongyuan earthquake is not only distributed in the well-known Hindu Kush and Burma Mountain arc, but also converges with the Indian River in the Indian Ocean Plate and the Eurasian Plate - There are also Mesozoic seismic events distributed to the south of the Brahmaputra, and to the Pamir, Western Kunlun, Qaidam and southern Tianshan mountains within the Eurasian Plate. They constitute the three southern-sourced seismic belts in this area. The presence of these mesogenic earthquake focal zones shows that after the collision of the north-moving Indian subcontinent with the Asian continent, the northern margin of the Indian subcontinent itself did not diminish but instead forced the Asian continent to produce large-scale The role of reduction. The discontinuity of the Central Earthquake distribution in the plane reveals the many modern strike-slip faults in this area. The tremendous displacements of these strike-slip faults show that the lateral movement between the blocks within the Qinghai-Tibet Plateau is also considerable. Finally, a number of modes of formation and development of the South Convergent elimination belt in the Asian continent are proposed.