Lower Cretaceous Sequence Stratigraphy of Fula Depression, Muglad Basin, Sudan
- Received Date: 1900-01-01
- Rev Recd Date: 1900-01-01
- Publish Date: 2008-12-10
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Key words:
- Muglad Basin /
- sequence stratigraphy /
- rift basin /
- depositional system /
- /
Abstract: Abu Gabra Formation of Cretaceous Fula depression, which is formed during the first rifting cycle, can be divided into three secondorder sequences, namely, sequence K1SSI, sequence K1SSII and sequence K1SSIII. They can correspond separately to the strata deposited in the early, middle and late rift period. Of the three secondorder sequences, the sequence K1SSI and sequence K1SSIII can be subdivided into two thirdorder sequences, the sequence K1SSII into three thirdorder sequences. Based on the integrated analysis of seismic data, core and well logging, the distribution of sedimentary facies and the prediction of sedimentary system are achieved. Through investigation, 7 types of sedimentary facies are recognized, namely, fluvial deposit, delta, fan delta, braided delta, proximal sublacustrine fan, lacustrine facies.
Due to the evolution of their sedimentary facies, five chief depositional systems are established in the Fula depression. They are fan delta system in the NE, delta system in the NW, proximal sublacustrine fan in the west, braided delta system in the ES and fluvial system produced in the early period. The distribution and evolution of the depositional systems is controlled by tectonics, probably influenced by paleotopography and paleogeography.
Citation: | YANG Junsheng. Lower Cretaceous Sequence Stratigraphy of Fula Depression, Muglad Basin, Sudan[J]. Acta Sedimentologica Sinica, 2008, 26(6): 994-1004. |