南海輓近海平面变化与构造升降初步研究

揭示南海輓近海平面变动和古岸线诸多遗迹,探讨晚更新世以来海平面变化一般规律,初步分析南海周缘中全新世和现代地壳构造升降速率,得出本区海平面上升率适中参考值为0.10—2.0mm/a,初步估算未来50年内海平面变化趋势在1.26—4.0mm/a之间;而构造升降受块断差异运动控制,一般规律是南海北部沿岸自东向西递减,由福建南部1.15mm/a至海南岛南部0.54mm/a。近代地壳形变资料亦证实这种变化规律。

THE PRELIMINARY STUDY ON NEOID SEA LEVEL CHANGE AND CRUSTAL ELEVATION AND SUBSIDENCE MOVEMENT IN SOUTH CHINA SEA

The paper indicates the neoid fluctuation of sea level and many ancient coastal traces, analyses the general regularity of sea level change since Late Pleistocene in South China Sea and analyses Mid-Holocene and modern velocity of crustal elevation and subsidence around South China Sea, gives the reference values of the sea level rising velocity (0.10-2. Omm/a), evaluates the various tendency range (0. 5-2. 0mm/a) of sea level in the future. Crustal elevation and subsidence are controlled by fault-block differential movement, in general it reduces from east to west in the coast of northern South China Sea from 1. 15mm/a in the south of Fujian to 0. 54mm/a in the south of Hainan. Recent information on crustal deformation verifies this type of regularity;