Depositional characteristics and temporal and spatial evolution of deep water channel complex systems: A case study of Middle Miocene in the Rovuma Basin, East Africa

Sun Hui; Liu Shaozhi; Fan Guozhang; L&#252; Fuliang

doi:10.3969/j.issn.0253-4193.2019.01.009

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Sun Hui, Liu Shaozhi, Fan Guozhang, Lü Fuliang. Depositional characteristics and temporal and spatial evolution of deep water channel complex systems: A case study of Middle Miocene in the Rovuma Basin, East Africa[J]. Haiyang Xuebao, 2019, 41(1): 87-97. doi: 10.3969/j.issn.0253-4193.2019.01.009

Citation:

Sun Hui, Liu Shaozhi, Fan Guozhang, Lü Fuliang. Depositional characteristics and temporal and spatial evolution of deep water channel complex systems: A case study of Middle Miocene in the Rovuma Basin, East Africa[J]. Haiyang Xuebao, 2019, 41(1): 87-97. doi: 10.3969/j.issn.0253-4193.2019.01.009

Citation:

Sun Hui, Liu Shaozhi, Fan Guozhang, Lü Fuliang. Depositional characteristics and temporal and spatial evolution of deep water channel complex systems: A case study of Middle Miocene in the Rovuma Basin, East Africa[J]. Haiyang Xuebao, 2019, 41(1): 87-97. doi: 10.3969/j.issn.0253-4193.2019.01.009

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Depositional characteristics and temporal and spatial evolution of deep water channel complex systems: A case study of Middle Miocene in the Rovuma Basin, East Africa

doi: 10.3969/j.issn.0253-4193.2019.01.009

PetroChina Hangzhou Research Institute of Geology, Hangzhou 310023, China

Received Date: 2017-11-07
Rev Recd Date: 2018-03-16

Abstract

Abstract

The channel complex systems of the Middle Miocene in the Rovuma Basin, East Africa exhibits complex filling characteristics and space-time evolution. The distribution of various hierarchies in channel complex system is analyzed under seismic resolution by several seismic techniques, such as 3D visualization, horizontal coherence slice, interval slice of root mean square amplitude, and the vertical and lateral evolution models are established. The channel complex system in Middle Miocene in the Rovuma Basin is composed with four identified hierarchies including channel complex system, channel complex set, channel complex and channel. The channel complex system evolves from strongly restricted to locally restricted along the direction of turbidity currents. The channel complex system is differentiated into three independent channel complex sets in the distal. The channel complex set shows four depositional patterns, two patterns are consistent and synchronous with the channel complex system, the other two patterns are weak confined and unconfined channel complex sets. Deep water deposition in channel complex systems is mainly affected by the sea level change, slope gradient and bottom current, the sedimentary scale, transport distance, deposition position, extension direction and external morphology change with time and space. The channel complex system presents a complex multi-level filling feature. The vertical overlap patterns vary with the location of the deposits. The late distribution of early channel complex set affect the development of the later channel complex set.
- Rovuma Basin,
- channel complex system,
- channel complex set,
- seismic technology,
- sedimentary feature,
- evolution,
- model

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References(33)

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