Tectono-sequence stratigraphic analysis of the Lower Cretaceous Abu Gabra Formation in the Fula Sub-basin, Muglad Basin, southern Sudan

摘要: Abstract The Fula Sub-basin of the Muglad Basin southern Sudan is an active-fault bounded basin with area approximately 3300 km 2 . Lower Cretaceous Abu Gabra Formation formed during first three rifting cycles. It can be subdivided into five 3rd-order sequences named SQA∼SQE from bottom to top, indicating stages tectonostratigraphy and tectonosedimentary evolution. spatial distribution temporal evolution clastic depositional systems are described in this paper based on integrated analysis seismic, core well logging data. In Sub-basin, a variety recognized, namely, fan delta, braided sublacustrine lacustrine system. has undergone complex phased evolution, high abundance transfer zones developed, causing resulting architecture both sequence system controlled by various types zones. following architectures northern part have been identified: simple dustpan-shaped north, transfer-zone stratigraphic middle graben-shaped south. under control large-scale central zone, nine models built study effect at least categories small-scale Sub-basin. play significant roles fill, primarily controlling positions deposit-input points. This provides valuable insights tectonic continental rift such as