论文部分内容阅读
(一)多年来的勘探实践揭示华南泥盆纪沉积有三个显著特征:沉积物厚度的剧变;沉积岩相的分异;由前二者所表现出来的古构造线的曲折多变。譬如:目前已知地层的最大厚度达4400米以上(估计超过5000米),在30余公里的距离内,其厚薄相差可达10倍以上;岩相的急剧变异使单纯的岩性对比已不可能,古生物群的面貌也随同岩性的变化而产生明显的差异;古构造线的方向以黔南为例,从早古生代的北东或北北东向转为
(I) Exploration practice over the years has revealed three distinctive features of Devonian sediments in South China: dramatic changes in sediment thickness; differences in sedimentary facies; and the twists and turns in paleo-tectonic lines exhibited by the former two. For example, it is known that the maximum thickness of strata is more than 4,400 meters (estimated to exceed 5,000 meters), and the difference in thickness is more than 10 times within a distance of more than 30 kilometers. The rapid variation of lithofacies makes the simple lithology comparison no longer It is possible that the paleontological fauna also produced obvious differences with the change of lithology. The direction of paleotectonic line is Qiannan, for example, from the northeast or north-north east of the Paleozoic