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在回顾五峰组-龙马溪组两个地层单位沿革并重申其定义与划分基础上,重建了华南五峰组-龙马溪组及其相关地层序列的区域地层框架.根据这一框架中奥陶-志留纪黑色笔石岩系的穿时性、以及相关地层序列纵向演化特征与岩石圈板块挠曲模式的联系,结合所发现钾质斑脱岩源岩的板块汇聚背景,以及该阶段海平面升降与黑色岩系对应关系,提出控制该阶段华南黑色岩系的时空展布格局的主要因素有两个,即该阶段自南东向北西的华夏地块与扬子地块幕式汇聚过程所产生的岩石圈板块挠曲-周缘前陆盆地的同向迁移,以及该阶段两次全球性的三级海平面变化快速上升阶段所导致的缺氧及欠补偿水体.本文认为,要在华南奥陶-志留纪(包括其他断代)寻找其他可能的烃源岩层位,可能要首先考虑类似背景下这两种因素综合作用所导致的快速沉降及深水缺氧的沉积环境.
Based on the review of the evolution of two strata units of Wufeng Formation - Longmaxi Formation and reiterating their definition and division, the regional stratigraphic framework of the South China Wufeng Formation - Longmaxi Formation and its related stratigraphic sequences was reconstructed. According to the framework of Ordovician And the relationship between the longitudinal evolution of related stratigraphic sequences and the lithospheric plate flexural pattern. Combined with the plate convergence background of the discovered karatitic plagioclase source rocks, and the sea level rise and fall of this stage It is proposed that there are two main factors that control the spatial and temporal distribution pattern of the South China black rock series at this stage, that is, the coalescence of the Cathaysian Block and the Yangtze block from south to east to northwest in this stage Lithospheric plate deflection - the same direction migration of the peripheral foreland basin, and the hypoxia and undercompensation of water caused by two rapid global third-level sea level changes at this stage.In this paper, Silurian (including other dynasties) looking for other possible hydrocarbon source rock formations may first consider the sedimentation environment of rapid subsidence and deep anoxia caused by the combined effect of these two factors under similar background.