中国西北地区石炭纪沉积盆地分析

国内外百余年的油气资源普查勘探表明,沉积盆地分析是含油气盆地地质研究的核心。法国地质学家A. Perrodon(1980)在“石油地球动力学”一书中,开宗明义地提出“没有盆地,便没有石油”(Pas de bassin, Pas de Petrole)。在此以前,一位美国地质学家L.G. Wecks(1975)也认为:“盆地的分类是估计未发现油气资源量的基础”。一个地质历史发展较长的现今的沉积盆地,多数是由几个性质不同的原型沉积盆地叠合而成(如我国的塔里木、四川、鄂尔多斯等盆地),要剖析一个较复杂的叠合沉积盆地,应从其不同的原型沉积盆地分析入手。我国著名石油地质与大地构造学家朱夏在“论中国含油气盆地构造”(1986)一书中指出。“一

Analysis of the Carboniferous Sedimentary Basins in Northwest China

The Carboniferous deposits which contain commercial oil and gas are well-developed in Northwest China. What kind of the basins would be in the depositional period attracts so many geologists. In terms of sedimentary characteristics, palaeotectonic configuation, palaeo-oceanography and palaeo-climate, the author suggests that the primary factors controlling the sedimentation of the Carboniferous basins in the study area include sea level fluctuation, palaeoclimate background and tectonism among which the latter is the most important. According to the above-mentioned factors, three sedimentary facies(nonmarine, transitional and marine facies), three palaeoclimatic zones (subtropical, temperate and subfrigid zones)and three tectonic types(ocean crust, transitional crust and continental crust types)have been distinguished for the basins. A comprehensive name was then given to a certain basin. This classification is easy not only to name but also to correlate. Therefore, it is helpful to the prediction of the occurrence of the basin sediments, siratabound deposits, especially oil and gas resources.