福建东南沿海近十年来地壳水平形变趋势分析

根据福建东南沿海长澳带上布设的八个精密激光测距网近十年来的观测资料,计算出各三角点水平位移矢量及水平应变等各项参数,并结合地震地质背景,对福建沿海地区自1981年以来的地壳水平形变进行了探讨.结果表明,福建东南沿海近十年来总的水平应变以张应变为主导,但长澳带不同地段的应变形态各不相同,差异性较为强烈。

ANALYSIS OF TENDENCY OF HORIZONTAL CRUSTAL DEFORMATION ALONG THE COAST OF SOUTHEAST FUJIAN DURING LAST DECADE

In this paper the horizontal crustal deformation along the coast of Southeast Fujian since 1981 is analyzed from various parameters, such as horizontal deformation vector and horizontal strain calculated for every triangle points from the data of 10-years,observations made on eight precise laser distance measuring metworks set up along the Changle-Nan'ao zone in connection with seismo-geo-logical background. The result shows that the horizontal strain on the coast of Southeast Fujian during last ten years is predominated by a tensile strain. but different strain patterns were found at different sections of the Changle-Nan'ao zone, with stronger variation in their amplitude.