冲绳海槽海底地形的补偿模式初步研究  

PRELIMINARY STUDY ON THE COMPENSATION MODEL OF SUBMARINE TOPOGRAPHY IN THE OKINAWA TROUGH

作　　者：刘保华[1] 刘忠臣[1] 王述功[1] 

机构地区：[1]国家海洋局第一海洋研究所

出　　处：《海洋地质与第四纪地质》1998年第4期29-34,共6页Marine Geology & Quaternary Geology

摘　　要：从区域补偿模式和实验均衡理论出发，利用重力和地形资料计算了冲绳海槽的均衡响应函数，结果表明：冲绳海槽南段弹性板有效厚度和补偿深度明显大于中段，结合其它地质地球物理资料解释认为，产生这种差异的原因主要是南、中两段岩石圈温度和补偿机制的不同所致。Based on the model of regional compensation and theory of experimental isostasy,the isostatic response function in the Okinawa Trough is calculated using the gravity and topographic data.The results show:(1)the southern Okinawa Trough is evidently different from middle Okinawa Trough in compensation model,(2)the southern Okinawa Trough lithosphere is similar to spreading type plate in effective elastic thickness,(3)both the southern and middle Okinawa Trough areas have the average heat flow value nearly the same as that of the deep lithosphere,and (4)the southern Okinawa Trough mainly has the compensation on Moho and at the top of the anomalous upper mantle,while the middle Okinawa Trough mainly has the compensation on Moho and in the inner of the crust.Interpretation from other geological and geophysical data is that these are probably due to the differences of temperature of the lithosphere and the compensation mechanism.

关 键 词：补偿模式 地形负载 下部负载 冲绳海槽 海底地形 

分 类 号：P737.2[天文地球—海洋地质] P736.14[天文地球—海洋科学]