Upper Carboniferous Deep Water Sediments, Western Ireland: Analogues for Passive Margin Turbidite Plays

Martinsen, Ole J.; Lien, Trond; Walker, Roger G.

doi:10.5724/gcs.00.15.0533

Cited by 43 publications

(87 citation statements)

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“…Clark & Pickering, 1996;Kolla et al, 2001;Abreu et al, 2003;Deptuck et al, 2003). The development of long and sinuous submarine channels is consistent with the evidence of sustained turbidity currents (see facies C earlier in Table 1), which, in the context of a deltaic feeder might support the notion of river-generated hyperpycnal flows (Nakajima et al, 1998;Elliott, 2000;Martinsen et al, 2000;Sinclair, 2000;Johnson et al, 2001b).…”

Section: Morphodynamics Of the Turbiditic Systemsupporting

confidence: 58%

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Facies Anatomy of a Sand‐Rich Channelized Turbiditic System: The Eocene Kusuri Formation in the Sinop Basin, North‐Central Turkey

Janbu

Nemec

Kirman

et al. 2007

Sedimentary Processes, Environments and Basins

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This study focuses on a basin-floor turbiditic system in an Eocene foredeep basin, using facies analysis supplemented with micropalaeontological and ichnological data. Sediment dispersal processes are interpreted from sedimentary facies, and the morphogenesis, spatial relationships and stratigraphic distribution of facies associations are used to reconstruct the behaviour and morphodynamic evolution of the turbiditic system. The case study sheds more light on the development of submarine channels and related patterns of overbank sedimentation in narrow foreland basins, and contributes to a better understanding of the geological history of the Central Pontides.The lower to middle Eocene Kusuri Formation in the Sinop Basin, north-central Anatolia, is a succession of siliciclastic turbidites ~1200 m thick, well-exposed on the Turkish Black Sea coast. The deposition occurred in a west-trending foredeep trough of the Central Pontides, ~30 km wide and > 150 km long, and involved a deep-water axial dispersal system supplied with coarse sediment by a fluvio-deltaic feeder draining the emerged adjacent foreland of the Eastern Pontides. Sedimentary facies include hemipelagic 'background' mudstones, thin muddy turbidites and 'classic' Bouma-type turbidites, a wide range of non-classic turbidites attributed to low-and high-density sustained currents, and gravelly debrisflow deposits. These facies form four major associations:1 mudstones interspersed with thin turbidite sheets; 2 broad depositional lobes with thickening-upward bedding trends; 3 poorly defined wide palaeochannels, solitary sinuous palaeochannels and multistorey palaeochannel complexes; 4 packages of thin overbank turbidites with tabular, wedge-shaped or sigmoidal bedding.The first assemblage forms the lowermost and uppermost part of the Kusuri Formation, whereas the others occur in its middle main part. The poorly defined palaeochannels are 20-25 m thick, typically overlie the depositional lobes and are themselves overlain by the sinuous palaeochannels, 20-30 m thick and ≤ 400-500 m wide, which suggests that the former channels tended to evolve into the latter. The sinuous channels show lateral accretion (point bars) indicating meander-bend expansion combined with a marked downstream translation, and their depth/width aspect ratios are much lower than those of many modern submarine channels. The multistorey complexes of sinuous palaeochannels are 100-160 m thick and estimated to be ≤ 3-5 km wide. The vertical stacking of multistorey channels is attributed to the growth of syndepositional blind-thrust anticlines on the basin floor. The overbank facies assemblages indicate basin-wide flows (tabular bed packages),

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Section: Morphodynamics Of the Turbiditic Systemsupporting

confidence: 58%

“…In short, the actual significance of such sporadic in-channel heterolithic LAPs is by no means established (see also Martinsen et al, 2000;Lien et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Facies Anatomy of a Sand‐Rich Channelized Turbiditic System: The Eocene Kusuri Formation in the Sinop Basin, North‐Central Turkey

Janbu

Nemec

Kirman

et al. 2007

Sedimentary Processes, Environments and Basins

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show abstract

“…Previous work has described the basin-fill setting, and abundant soft-sediment deformation of the Gull Island Formation (Collinson, Martinsen, Bakken, & Kloster, 1991;Martinsen, 1989;Martinsen & Bakken, 1990;Martinsen & Collinson, 2002;Martinsen, Walker, & Lien, 2000;Rider, 1974;Wignall & Best, 2000). The detailed facies and stratigraphic relationships within the Gull Island Formation have not been published previously.…”

Section: Introductionmentioning

confidence: 93%

“…This major lineament controlled the site of maximum subsidence in the Shannon Basin, perhaps related to extensional collapse during regional N -S extension in latest Devonian to early Carboniferous. The ENE -WSW basin elongation is important for the overall understanding of the deep-water basin-fill of the Shannon Basin (Collinson et al, 1991;Martinsen & Collinson, 2002;Martinsen et al, 2000). The confined nature of the Shannon Basin during deep-water deposition suggests that aspects of its basin-fill succession may compare with confined or laterally limited basins elsewhere, such as salt-controlled basins offshore West Africa, rift basins offshore Norway, and even some minibasins in the Gulf of Mexico.…”

Section: Basin Formationmentioning

confidence: 98%