摘要
通过对南海东沙以南海城隆坡航磁异常特征的分析研究，指出引起各类磁异常的地质原因，认为本区陆坡地壳结构与陆壳相同（只是厚度变薄了），属于由陆壳到洋壳的过渡型地壳。同时，圈出东沙南磁性基底拗陷，推测该拗陷是一个很有希望的含油气盆地，并对该拗陷沉积层厚度进行了计算。
Based on the research and classification of the characteristics of aeromagnetic anomaly in the ocean space southern of the Dongsha archipelago of South China Sea,the author points out that the crustal structure of continental slope in the study area is similar to the continental crust,only the thickness was changed to thinerand it's crust belongs to the transitional type transforming from continental to oceanic crust.A down-warping region of the magnetic basement has been delineated,which may infer a hopeful oil and gasbearing basin.Using aeromagnetic data,the author proposes a method and technique to calculate the sediment thickness in the down-warping region of magnetic basement,and the thickness of sediment layer has been calculated.
出处
《北京地质》
1996年第4期1-9,共9页
Beijing Geology
关键词
油气藏
含油气盆地
航磁异常
南海
陆坡
Dongsha archipelago of the South China Sea,crustal structure,continental slope,transitional type of crust,down-warping of magnetic basement,sediment thickness
