A Late Quaternary canyon/channel system, northwest Gulf of Mexico continental slope

Satterfield, Will M.; Behrens, E. William

doi:10.1016/0025-3227(90)90026-g

Cited by 76 publications

(45 citation statements)

References 6 publications

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“…In areas of shale withdrawal, ponded accommodation commonly takes the form of long, linear to arcuate, doubly-plunging synclines located landward of out-board deep-water thrust belts or within the hanging-walls of faults that cut the seafloor at the time of deposition. 'Fill-and-spill' processes dominate deposition on slopes with ponded intraslope basins eventually forming low gradient stepped-equilibrium profiles (Prather et al, 1998;Satterfield & Behrens, 1990;Winker, 1993;Fig. 2).…”

Section: Ponded Accommodationmentioning

confidence: 96%

Controls on reservoir distribution, architecture and stratigraphic trapping in slope settings

Prather

2003

Marine and Petroleum Geology

225

154

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Section: Ponded Accommodationmentioning

confidence: 96%

Controls on reservoir distribution, architecture and stratigraphic trapping in slope settings

Prather

2003

Marine and Petroleum Geology

225

154

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“…Another continental margin affected by salt tectonics is the Gulf of Mexico where diapiric salt structures have created numerous intraslope mini-basins. Deep-water channel models from the Gulf of Mexico (Satterfield and Behrens, 1990;Beaubouef and Friedmann, 2000) describe successive downslope basin filling by channelized turbidity currents. As basins fill with sediment they spill, bypass and deposit into the next basin downslope and erode some of the upslope sediments.…”

Section: Introductionmentioning

confidence: 99%

Submarine channels controlled by salt tectonics: Examples from 3D seismic data offshore Angola

Gee

Gawthorpe

2006

Marine and Petroleum Geology

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“…Previous studies have demonstrated that stepped slopes evolve temporally, often attributed to active mobile substrates or tectonics (Prather, 2003;Hay, 2012;Jobe et al, 2017; Fig. 1E), healing of mini-basins (Satterfield and Behrens, 1990;Prather et al, 1998;Prather, 2003), or through healing of initial mass-wasting generated slope relief (Shultz and Hubbard, 2005;Romans et al, 2011;Brooks et al, 2018a). An example of topographic relief being healed through time (Phase 1, Fig.…”

Section: Keymentioning

confidence: 99%

Disconnected submarine lobes as a record of stepped slope evolution over multiple sea-level cycles

et al. 2018

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The effects of abrupt changes in slope angle and orientation on turbidity current behavior have been investigated in numerous physical and numerical experiments and examined in outcrop, subsurface, and modern systems. However, the long-term impact of subtle and evolving seabed topography on the stratigraphic architecture of deep-water systems requires fine-scale observations and extensive 3-D constraints. This study focuses on the Permian Laingsburg and Fort Brown formations, where multiple large sand-rich systems (Units A-F) have been mapped from entrenched slope valleys, through channel-levee systems, to basin-floor lobe complexes over a 2500 km 2 area. Here, we investigate three thinner (typically <5 m in thickness) and less extensive sand-rich packages, Units A/B, B/C, and D/E, between the large-scale systems. Typically, these sand-rich units are sharp-based and topped, and contain scours and mudstone clast conglomerates that indicate deposition from high-energy turbidity currents. The mapped thickness and facies distribution suggest a lobate form. These distinctive units were deposited in similar spatial positions within the basin-fill and suggest similar accommodation patterns on the slope and basin floor prior to the larger systems (B, C, and E). Stratigraphically, these thin units represent the first sand deposition following major periods of shut-down in sediment supply, and are interpreted as marking a partial re-establishment of sand delivery pathways creating "disconnected lobes" that are fed mainly by flows sourced from failures on the shelf and upper slope rather than major feeder channel-levee systems.Thickness and facies patterns throughout the deep-water stratigraphy suggest seabed topography was present early in the basin formation and maintained persistently in a similar area to ultimately form a stepped slope profile. The stepped slope profile evolved through three key stages of development: Phase 1, where sediment supply exceeds deformation rate (likely caused by differential subsidence); Phase 2, where sediment supply is on average equal to deformation rate; and Phase 3, where deformation rate outpaces sediment supply. This study demonstrates that smaller systems are a sensitive record of evolving seabed topography and they can consequently be used to recreate more accurate paleotopographic profiles.

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A Late Quaternary canyon/channel system, northwest Gulf of Mexico continental slope

Cited by 76 publications

References 6 publications

Controls on reservoir distribution, architecture and stratigraphic trapping in slope settings

Controls on reservoir distribution, architecture and stratigraphic trapping in slope settings

Submarine channels controlled by salt tectonics: Examples from 3D seismic data offshore Angola

Disconnected submarine lobes as a record of stepped slope evolution over multiple sea-level cycles

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