应用双层拉张模式研究冲绳海槽的拉张史

STUDY ON THE EXTENSION HISTORY OF THE OKINAWA TROUGH BY A TWO-LAYER EXTENSION MODEL

江兴歌 朱建辉 蒋洪堪

Jiang Xingge Zhu Jianhui Jiang Hongkan

中国新星石油公司, 实验地质研究院, 江苏, 无锡, 214151

Research Institute of Experimental Geology, CNSPC, Wuxi, Jiangsu 214151

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。

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.

同济大学国家教委海洋地质开放实验室资助

https://doi.org/10.11781/sysydz199804398