海洋岩石圈板块有效弹性厚度研究

A study of the effective elastic thickness of the oceanic lithosphere

本文在前人研究大陆岩石圈板块有效弹性厚度的基础上,建立研究海洋岩石圈板块有效弹性厚度的理论模型,推导出与大陆岩石圈不同的海洋岩石圈板块响应函数Z(k,Te)理论计算公式.并分析海洋岩石圈板块响应函数Z(k,Te)的特点.文中对实际的海洋测量数据的响应函数Z(k,Te)进行计算和分析,估算我国南海南沙海域和南海中央海盆岩石圈板块有效弹性厚度分别约为10km和6～7km.

Based on the previous studies on the effective elastic thickness of the continental lithosphere,the model of oceanic lithosphere was set up for study of the effective elastic thickness of the lithosphere,and the theoretic formula of isostatic response function（admittance） Z（k,Te） for the oceanic lithosphere was derived.It differs from that of the continental lithosphere.The characters of isostatic response function Z（k,Te） in ocean were explained.The isostatic response function（admittance） Z（k,Te） derived from field data in Nansha was also calculated and the estimation of the effective elastic thickness of the oceanic lithosphere in Nansha sea area is 10 km,and in the Central Basin of South China Sea is 6～7 km.