Late Pleistocene Deep-Water Stratigraphy and Depositional Processes, Offshore Trinidad and Tobago

Brami, Tonya R.; Pirmez, Carlos; Archie, Curtis; Heeralal, Sookdeo; Holman, Kelly L.

doi:10.5724/gcs.00.15.0104

Cited by 46 publications

(63 citation statements)

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“…These features provide evidence of local (palaeo) stresses associated with compression or extension. Omosanya and Alves (2013) showed the recurrence of MTDs to vary across specific areas of elliptical 'drag zones' around growing diapirs, relating the morphology of basal shear surfaces to local strain and directions of transport during mass-wasting events (Brami et al, 2000;Lamarche et al, 2008). Sections of MTDs that were later uplifted on the flanks of growing diapirs form elongated features that are parallel to the dominant trend of basal ramps and promontories, constituting markers for seafloor strain around growing salt diapirs (Fig.…”

Section: Ramps and Flats In Basal Shear Surfacesmentioning

confidence: 96%

Submarine slide blocks and associated soft-sediment deformation in deep-water basins: A review

Alves

2015

Marine and Petroleum Geology

149

109

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a b s t r a c tThree-dimensional (3D) seismic and outcrop data are used to review the significance of submarine slide blocks and associated soft-sediment deformation structures in deep-water basins. Submarine slide blocks are generated during major instability events in a variety of geological settings and their size exceeds that of boulders, which are <4.1 m. Slide blocks can be~500 m high by >4.5 km long on a number of continental margins, presenting internal folding, thrusting and rolling over basal brecciaconglomerate carpets. In addition, soft-sediment deformation structures such as foliated strata, intrafolial folds, tiling, bookshelf sliding and dilational jogs reflect important shearing within blocks and their basal glide planes. This work proposes that buried blocks and associated coarse-grained debrites are capable of forming prolific reservoir intervals for hydrocarbons and mineralization. Three-dimensional leakage factor models show the bulk of fluid flow to be focused in vertical and horizontal surfaces within, and immediately below displaced blocks. The generation of large slide blocks can also mark the sudden release of overburden pressure, and result in the loss of seal competence above existing hydrocarbon fields. Ultimately, this review clarifies the present-day understanding on the modes of formation of submarine slide blocks, confirming their economic importance in deep-water basins throughout the world.

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Section: Ramps and Flats In Basal Shear Surfacesmentioning

confidence: 96%

Submarine slide blocks and associated soft-sediment deformation in deep-water basins: A review

Alves

2015

Marine and Petroleum Geology

149

109

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“…Similar basins have been encountered in both modern and ancient sedimentary successions throughout the world (e.g., Trinidad and Tobago, Brami et al 2000;Angola, Schollnberger and Vail 1999). Minibasins are formed from diapirism due to the buoyant instability of a mobile substrate (e.g., salt body) overlain by a load of denser sediment.…”

Section: Introductionmentioning

confidence: 99%

Surging Versus Continuous Turbidity Currents: Flow Dynamics and Deposits in an Experimental Intraslope Minibasin

Lamb¹,

Hickson²,

Marr³

et al. 2004

Journal of Sedimentary Research

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Small intraslope basins (ϳ 100 km 2 ), or ''minibasins,'' such as those found on the continental slope of the Gulf of Mexico, have been filled predominantly by turbidity currents. Each minibasin is the result of local subsidence and is partially or completely isolated from neighboring basins by ridges formed from compensational uplift. We undertook a series of experiments to investigate the relationship between the flow dynamics of turbidity currents entering a minibasin and the stratal architecture of their deposits. The experiments were performed using continuous-feed turbidity currents and surge-feed turbidity currents. A dimensionless ponding number is developed to compare the geometry of the deposits with the dynamics of the flows that filled the basins. The experimental surging turbidity currents created a deposit that was notably more ponded than the deposits of continuous turbidity currents.

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“…Impact of external forcings on sediment dispersal to the deep marine basins at short (b100 ka) time scales have been investigated for a long time, because they are important parameters governing the stratigraphic succession and resulting sedimentary architecture in deep water systems (Perlmutter and Mattews, 1989;Posamentier and Kolla, 2003). Although there has been some continued focus on sea-level in conceptual stratigraphic model that predict the delivery and formation of deep water deposits at 5th to 6th orders, corresponding to time scales b100 ka (Bouma et al, 1989;Posamentier et al, 1991;Brami et al, 2000;Catuneanu et al, 2009), an increasing number of studies show that climatically-driven variations in fluvial water and sediment discharge have a strong influence on turbidite system growth. This includes both glacially/ice-sheetcontrolled (Skene and Piper, 2003;Zaragosi et al, 2006;Tripsanas et al, 2007;Toucanne et al, 2008); and monsoon-controlled (Ducassou et al, 2009) Pleistocene turbidite systems along passive margins.…”

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confidence: 99%

Highstand vs. lowstand turbidite system growth in the Makran active margin: Imprints of high-frequency external controls on sediment delivery mechanisms to deep water systems

et al. 2010

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Late Pleistocene Deep-Water Stratigraphy and Depositional Processes, Offshore Trinidad and Tobago

Cited by 46 publications

References 0 publications

Submarine slide blocks and associated soft-sediment deformation in deep-water basins: A review

Submarine slide blocks and associated soft-sediment deformation in deep-water basins: A review

Surging Versus Continuous Turbidity Currents: Flow Dynamics and Deposits in an Experimental Intraslope Minibasin

Highstand vs. lowstand turbidite system growth in the Makran active margin: Imprints of high-frequency external controls on sediment delivery mechanisms to deep water systems

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