通过精细测量及观测南京、巢湖、浙江地区25个露头点露头资料和典型剖面测量以及资料收集整理,综合分析认为下扬子陆域主要发育下寒武统荷塘组、下奥陶统宁国组(大湾-牯牛组)、上奥陶统五峰组-下志留统高家边组、下二叠统栖霞组、上二叠统龙潭组、上二叠统大隆组6套区域性主力烃源岩。烃源岩的发育受多种因素控制,在下扬子地区主要受构造演化、最大海平面变化、古地貌单元、沉积环境等因素控制。在构造演化控制的特定古地理格局下,大规模海侵期控制了烃源岩发育层位,古地貌单元控制了烃源岩分布范围,沉积环境控制了烃源岩的类型。以下扬子陆域烃源岩研究为对比基础,探讨了寻找南黄海盆地烃源岩的方向。
Field studies have been made for 25 outcrops in the region around Nanjing, Chaohu and Zhejiang, in addition to a thorough review of collected data and references. Six regional hydrocarbon source rocks are recognized on land of the lower Yangtze platform, which include the Lower Cambrian Hetang Formation, Lower Ordovician Ningguo Formation (Dawan - Guniu), Upper Ordovician Wufeng - Lower Silurian Gaojiabian Formation, Lower Permian Oixia Formation, Upper Permian Longtan and Dalong Formations. The development of hydrocarbon source rocks is controlled by many factors. In the Yangtze region they include mainly the tectonic evolution, maximum flooding surface, ancient geomorphology, sedimentary environment etc. The tectonics and maximum flooding surface control the stratigraphic horizons of hydrocar- bon source rocks, the paleogeomorphology controls the distribution of hydrocarbon source rocks, and the depositional environment controls the types of hydrocarbon source rocks. The research results on land of lower Yangtze platform may provide a basis for comparison in the South Yellow Sea Basin.