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本文从理论及实际资料两个方面入手,初步探讨了海平面与沿岸地壳这两个独立变量之间的相互关系。结果表明,只有对两者变化幅度值进行数学分析,才能确切地了解海岸升降的原因;我国东部沿岸新构造时期地壳的升降活动所反映的海平面升降变化总体上显示为北高南低特征,该特征与沿岸断块构造差异活动(北降南升)密切相关,而根据地壳形变测量、验潮站观测资料所得的海平面则相反(北低南高)。这一矛盾现象似可用长周期趋势变化与短周期瞬时变化的“非等效性”予以解释。文中还认为南海海域近代海面上升与沿岸地壳下降活动关系密切;以地壳年均升降速率为指标划分地壳垂直活动强度类型应是一种可行的方案;华南沿岸既有“相对稳定”岸段,也有“活动”及“强烈活动”岸段。
This article starts from the two aspects of theory and actual data, and explores the interrelation between two independent variables, sea level and coastal crust. The results show that only the mathematical analysis of the magnitude of the two changes can exactly understand the reason of the coast lift. The sea level rise and fall reflected by the ascending and descending activities of the crust in the new tectonic period along the east coast of China shows a north-south- This feature is closely related to the tectonic activity of the fault block along the coast (north to south). According to the crustal deformation measurement, the sea level obtained from the tide gauge observations is opposite (north and south high). This paradoxical phenomenon can be explained by the “non-equivalence” of long-term trend changes and short-period transient changes. It is also believed that the rise of the sea level in the South China Sea is closely related to the descending of the coast. The average crustal vertical activity intensity should be classified according to the annual average rate of crustal rise and fall as a feasible solution. “Activities” and “intense activities” shore segment.