STUDY ON THE EXTENSION HISTORY OF THE OKINAWA TROUGH BY A TWO-LAYER EXTENSION MODEL
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摘要: 本文根据冲绳海槽的地质地球物理资料,利用双层拉张模式计算了冲绳海槽形成过程中的两次拉张在岩石圈厚度、地壳厚度、地表热流值、构造沉降和热沉降以及地温场方面的反映。讨论了各类参数之间的相互关系,估算了各类参数对计算结果的影响。计算的结果为认识冲绳海槽拉张史提供了重要的线索。Abstract: Based on the geologic and geophysical data of the Okinawa Trough,the reflection of two times of extension during the forming of the Okinawa Trough in the thickness of lithosphere,the thickness of Earth's crust,the heat flow value of Earth's surface,tectonic subsidence and thermal subsidence as well as geotemperature field is calculated by a two-layer extension model.Besides,the interrelation among parameters is discussed,and effect of each type of parameters on the calculated results is estimated.These results have provided important clues for understanding the extension history of the Okinawa Trough.
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