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Evolution and controlling factors of the gravity flow deposits in the Miocene sequence stratigraphic framework, the Lower Congo-Congo Fan Basin, West Africa
Received date: 2020-09-17
Revised date: 2021-01-07
Online published: 2021-02-07
Supported by
China National Science and Technology Major Project(2016ZX05004-002);National Natural Science Foundation of China(91328201)
To understand the evolution of the Miocene gravity flow deposits in the Lower Congo-Congo Fan Basin, this paper documents the Miocene sequence stratigraphic framework, the depositional characteristics and the controlling factors of the gravity flow system. Based on the establishment of high-resolution sequence stratigraphic framework, lithofacies characteristics and sedimentary units of the gravity flow deposits in the region are identified by using seismic, well logging and core data comprehensively, and the sedimentary evolution process is revealed and the controlling factors are discussed. The Miocene can be divided into four 3rd-order sequences (SQ1-SQ4). The gravity flow deposits mainly include siliciclastic rock and pelite. The main sedimentary units include slumping deposits, mass transport deposits (MTD), channel fills, levee-overbank deposits, and frontal lobes. In the Early Miocene (SQ1), mainly gull-wing, weakly restricted to unrestricted depositional channel-overbank complexes and lobes were formed. In the early Middle Miocene (SQ2), W-shaped and weakly restricted erosional-depositional channels (multi-phase superposition) were subsequently developed. In the late Middle Miocene (SQ3), primarily U-shaped and restricted erosional channels were developed. In the Late Miocene (SQ4), largely V-shaped and deeply erosional isolated channels were formed in the study area. Climate cooling and continuous fall of the sea level made the study area change from toe of slope-submarine plain to lower continental slope, middle continental slope and finally to upper continental slope, which in turn affected the strength of the gravity flow. The three times of tectonic uplifting and climate cooling in the West African coast provided abundant sediment supply for the development of gravity flow deposits. Multistage activities of salt structures played important roles in redirecting, restricting, blocking and destroying the gravity flow deposits. Clarifying the characteristics, evolution and controlling factors of the Miocene gravity flow deposits in the Lower Congo-Congo Fan Basin can provide reference for deep-water petroleum exploration in this basin.
Hua CHEN , Changsong LIN , Zhongmin ZHANG , Demin ZHANG , Ming LI , Gaokui WU , Yixuan ZHU , Hai XU , Wenming LU , Jihua CHEN . Evolution and controlling factors of the gravity flow deposits in the Miocene sequence stratigraphic framework, the Lower Congo-Congo Fan Basin, West Africa[J]. Petroleum Exploration and Development, 2021 , 48(1) : 146 -158 . DOI: 10.1016/S1876-3804(21)60011-3
| [1] | LIN Changsong, XIA Qinglong, SHI Hesheng, et al. Geomorphological evolution, source to sink system and basin analysis. Earth Science Frontiers, 2015,22(1):9-20. |
| [2] | LIN C S, LIU J Y, ERIKSSON K, et al. Late Ordovician, deep-water gravity-flow deposits, palaeogeography and tectonic setting, Tarim Basin, Northwest China. Basin Research, 2014,26(2):297-319. |
| [3] | POSAMENTIER H W, KOLLA V. Seismic geomorphology and stratigraphy of depositional elements in deep-water settings. Journal of Sedimentary Research, 2003,73(3):367-388. |
| [4] | CLARK J D, PICKERING K T. Submarine channels: Processes and architecture. London: Vallis Press, 1996. |
| [5] | LIN C S, LIU J Y, CAI S X, et al. Depositional architecture and developing settings of large-scale incised valley and submarine gravity flow systems in the Yinggehai and Qiongdongnan basins, South China Sea. Chinese Science Bulletin, 2001,46(8):690-693. |
| [6] | TAO Ze, LIN Changsong, ZHANG Zhongtao, et al. Sequence architecture and deep water gravity-flow deposits of the middle and upper member of Hanjiang Formation of Miocene in Baiyun Sag, Pearl River Mouth Basin. Journal of Palaeogeography, 2017,19(4):623-634. |
| [7] | GONG C L, WANG Y M, STEEL R J, et al. Flow processes and sedimentation in unidirectionally migrating deep- water channels: From a three-dimensional seismic perspective. Sedimentology, 2016,63(3):645-661. |
| [8] | LIN C S, JIANG J, SHI H S, et al. Sequence architecture and depositional evolution of the northern continental slope of the South China Sea: Responses to tectonic processes and changes in sea level. Basin Research, 2018,30(1):568-595. |
| [9] | KOLLA V, BOURGES P, URRITY J M, et al. Evolution of deep-water Tertiary sinuous channels offshore Angola (West Africa) and implications for reservoir architecture. AAPG Bulletin, 2001,85(8):1373-1405. |
| [10] | ZHANG Leifu, LI Yilong. Architecture of deepwater turbidite lobes: A case study of Carboniferous turbidite outcrop in the Clare Basin, Ireland. Petroleum Exploration and Development, 2020,47(5):925-934. |
| [11] | ZHOU Lihong, SUN Zhihua, TANG Ge, et al. Pliocene hyperpycnal flow and its sedimentary pattern in D block of Rakhine Basin in Bay of Bengal. Petroleum Exploration and Development, 2020,47(2):297-308. |
| [12] | SUN Haitao, ZHONG Dakang, ZHANG Simeng. Difference in hydrocarbon distribution in passive margin basins of east and west Africa. Petroleum Exploration and Development, 2010,37(5):561-567. |
| [13] | OLUBOYO A P, GAWTHORPE R L, BAKKE K, et al. Salt tectonic controls on deep-water turbidite depositional systems: Miocene, southwestern Lower Congo Basin, offshore Angola. Basin Research, 2014,26(4):597-620. |
| [14] | WANG Linlin, WANG Zhenqi, XIAO Peng. Characterization of deep water sedimentary system in the Miocene of Block A in Lower Congo Basin. Oil & Gas Geology, 2015,36(6):963-974. |
| [15] | CAI Lulu, LIU Chuncheng, LYU Ming, et al. The development characteristics of deep water channel and sedimentary reservoir prediction in Lower Congo Basin, West Africa. China Offshore Oil and Gas, 2016,28(2):60-70. |
| [16] | LIU Xinying, YU Shui, TAO Weixiang, et al. Filling architecture and evolution of Upper Miocene deep-water channel in Congo Fan Basin. Earth Science, 2012,37(1):105-112. |
| [17] | CHEN Liang, ZHAO Qianhui, WANG Yingmin, et al. Interactions between submarine channels and salt structures: Examples from the Lower Congo Basin. Acta Sedimentologica Sinica, 2017,35(6):1197-1204. |
| [18] | QIN Yanqun, BA Dan, XU Hailong, et al. Sedimentation and hydrocarbon accumulation of deep-water fan fed by large canyon in passive continental margin: A case of Congo fan in West Africa. China Petroleum Exploration, 2018,23(6):59-68. |
| [19] | LI Quan, WU Wei, KANG Hongquan, et al. Characteristics and controlling factors of deep-water channel sedimentation in Lower Congo Basin, West Africa. Oil & Gas Geology, 2019,40(4):917-929. |
| [20] | ANKA Z, SéRRANE M. Reconnaissance study of the ancient Zaire (Congo) deep-sea fan (ZaiAngo Project). Marine Geology, 2004,209(1/2/3/4):223-244. |
| [21] | YU Shui. Depositional characteristics and pattern of Miocene deep water gravity flow deposits in Lower Cango Basin, West Africa. China Offshore Oil and Gas, 2018,30(4):13-19. |
| [22] | MOSCARDELLI L, WOOD L, MANN P. Mass transport complexes and associated processes in the offshore area of Trinidad and Venezuela. AAPG Bulletin, 2006,90(7):1059-1088. |
| [23] | WEIMER P, LINK M H. Seismic facies and sedimentary processes of submarine fans and turbidite systems. New York: Springer Verlag, 1991. |
| [24] | LIN Yu, WU Shenghe, WANG Xing, et al. Research on architecture model of deepwater turbidity channel system: A case study of a deepwater research area in Niger Delta Basin, West Africa. Geological Review, 2013,59(3):510-520. |
| [25] | WAN Qionghua, WU Shenghe, CHEN Liang, et al. Analysis of flow unit distribution based on architecture of deep-water turbidite channel systems. Oil & Gas Geology, 2015,36(2):306-313. |
| [26] | XIAO Bin. Sedimentary system and formation mechanism of deep-water channel complex. Wuhan: Changjiang University, 2012. |
| [27] | JIANG Shu, WANG Hua, PAUL Wermer. Sequence stratigraphy characteristics and sedimentary elements in deepwater. Earth Science, 2008,33(6):825-833. |
| [28] | ZHU M, GRAHAM S, PANG X, et al. Characteristics of migrating submarine canyons from the middle Miocene to present: Implications for paleoceanographic circulation, northern South China Sea. Marine and Petroleum Geology, 2010,27(1):307-319. |
| [29] | JIANG J, SHI H S, LIN C S, et al. Sequence architecture and depositional evolution of the Late Miocene to Quaternary northeastern shelf margin of the South China Sea. Marine and Petroleum Geology, 2017,81:79-97. |
| [30] | GOUIZA M, BERTOTTI G, CHARTON R, et al. New evidence of “anomalous” vertical movements along the Hinterland of the Atlantic NW African Margin. Journal of Geophysical Research: Solid Earth, 2019,124(12):13333-13353. |
| [31] | SéRANNE M, ANKA Z. South Atlantic continental margins of Africa: A comparison of the tectonic vs climate interplay on the evolution of equatorial west Africa and SW Africa margins. Journal of African Earth Sciences, 2005,43(1/2/3):283-300. |
| [32] | YE J, CHARDON D, ROUBY D, et al. Paleogeographic and structural evolution of northwestern Africa and its Atlantic margins since the early Mesozoic. Geosphere, 2017,13(4):1254-1284. |
| [33] | MOURLOT Y, RODDAZ M, DERA G, et al. Geochemical evidence for large-scale drainage reorganization in Northwest Africa during the Cretaceous. Geochemistry, Geophysics, Geosystems, 2018,19(5):1690-1712. |
| [34] | ROWAN M G, WEIMER P. Salt-sediment interaction, northern Green Canyon and Ewing bank (offshore Louisiana), northern Gulf of Mexico. AAPG Bulletin, 1998,82(5):1055-1082. |
| [35] | ROWAN M G. Passive-margin salt basins: Hyperextension, evaporite deposition, and salt tectonics. Basin Research, 2014,26(1):154-182. |
| [36] | MAYALL M, LONERGAN L, BOWMAN A, et al. The response of turbidite slope channels to growth-induced seabed topography. AAPG Bulletin, 2010,94(7):1011-1030. |
| [37] | MAYALL M, JONES E, CASEY M. Turbidite channel reservoirs-key elements in facies prediction and effective development. Marine and Petroleum Geology, 2006,23(8):821-841. |
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