中国近海前新生代残留盆地初探

中国近海沉积盆地按形成时代可以划分为新生代盆地和前新生代盆地。新生代陆相碎屑岩断陷盆地有良好的油气前景，而古生代还有广泛海相碳酸盐岩分布地区，只要它们经受中生代挤压，改造后还能保留下来，就具有巨大的油气潜力。初步分析中国近海的油气勘探资料及大地构造演化史表明，陆内断坳盆地下伏以古生代碳酸盐岩为主的残留盆地。而陆缘盆地并不是寻找古生代残留盆地的场所。但在台西南盆地，珠江口盆地潮汕坳陷发育海相中生代盆

A PRELIMINARY STUDY OF CHINESE OFFSHORE PRE-CENOZOIC RESIDUAL BASINS

Offshore sedimentary basins can be divided into Cenozoic basins and pre-Cenozoic basins according to their formation time. Pre-Cenozoic basins may also have hydrocarbon potential. From analysis of oil and gas exploration data and tectonic evolution of China seas,it shows that residual basins of Paleozoic marine facies carbonate rocks can be found under intracontinental fault-sag basins but not continental margin basins,and Mesozoic marine facies basins exist in Southwest Taiwan basin and Chaoshan sag of Pear River basin. Geophysical methods to study pre-Cenozoic basins must be considered first.