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由于菲律宾的油气藏主要蕴藏在南海东南部沉积层序中,人们对这些地层产生了重大兴趣。近来Taylor 等(1980,1983)模拟了南海盆地的板块构造演化,Holloway(1981)进而将此种模式加以扩展,以便将菲律宾群岛毗邻部分也包容在内。他们的解释主要以陆上地质近海区磁法和地震研究成果以及巴拉望西北陆架上和礼乐滩区域中的大量钻孔为基础(图1),当时还没有南海广大深海区的地质资料。在 Soane 号1982(SO23)和1983(SO72)的两个航次期间我们将地震剖面测量成果与大范围海底露头拖网取样成果加以综合,以获得苏禄海西北部和南海基底岩石的
Due to the fact that the Philippine reservoirs are mainly deposited in the sedimentary sequence in the southeastern part of the South China Sea, great interest has been generated in these formations. Recently Taylor et al. (1980, 1983) modeled the tectonic evolution of the South China Sea basin. Holloway (1981) further expanded this model to include the adjacent parts of the Philippine archipelago. Their explanations are mainly based on the results of magnetic and seismic studies in onshore geologic offshore areas and on a large number of boreholes in the Palaeo Northwest shelf and in the Li Leitan area (Figure 1). At that time, no geological data were available on the vast deep-sea area of the South China Sea . During the two voyages of Soane 1982 (SO23) and 1983 (SO72) we integrated the results of seismic profiling with the results of a wide range of seafloor outcrop trawling to obtain basalts in the northwestern and southern Southwestern Sulu