Submarine transitional flow deposits in the Paleogene Gulf of Mexico

Kane, Ian A.; Pontén, Anna

doi:10.1130/g33410.1

Cited by 159 publications

(182 citation statements)

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“…Interaction of sediment gravity flows with confining slopes may also drive flow transformations, for example, by decelerating a turbidity current and thus driving an increase in the near-bed sediment concentration to develop transitional flow deposits (Kane and Pontén, 2012). The slope angle and flow characteristics are critical: for the same flow, a lowangled slope may drive flow transformation so that its deposit evolves from a clean sand in a downslope setting into a progressively muddy poorly sorted sand toward the pinch-out (e.g., the upper sandstone package at Chalufy); conversely, the same flow interacting with a steep slope may decelerate relatively rapidly, leading to deposition across the available grain-size spectrum, and the deposition of a thick poorly sorted sandstone with a little draping of the slope (e.g., the lower sandstone package at Chalufy).…”

Section: Discussionmentioning

confidence: 99%

Seismic modeling in the analysis of deep-water sandstone termination styles

et al. 2013

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Innovative seismic forward modeling is used to illustrate the sensitivity within seismic data, and its application in the interpretation of onlap and pinch-out of terminating deep-water sandstones, two critical components in deep-water exploration and production. Sandstone quality, net-to-gross estimates, volume calculations, vertical connectivity, and stratigraphic trapping are all dependent on the sandstone extent and their seismic characteristics in these settings. However, seismic resolution is commonly insufficient to resolve the critical reservoir parameters. Seismic modeling of termination styles based on integrated outcrop and subsurface properties allows for depth-and resolution-focused predictive models to be built for improved subsurface analysis. This technique is currently underused as a method to better understand the sensitivity of seismic data to the target lithologies and their geometries. The Grès d'Annot Formation is a well-studied sand-prone deep-water system of Paleogene age, deposited in a bathymetrically complex setting. Six end-member termination styles are discussed, including three sand-prone styles-simple onlap (O s ), draping onlap (O d ), and bed thickening (O t )-and three heterolithic styles-advancing pinch-out (P a ), convergent pinch-out (P c ), and convergent thickening and pinch-out (P ct ). Local thickening close to the system margins is common in both sand-prone and heterolithic terminating strata and plays an important function in the appropriate distribution of sandstone. The outcrops are interpreted as potential (process) analogs for the complex sandstone distribution

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Section: Discussionmentioning

confidence: 99%

Seismic modeling in the analysis of deep-water sandstone termination styles

et al. 2013

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“…Further research is needed to determine if and how larger scale flows interact with soft muddy substrates to form decimeterand meter-scale intrabed turbidites, and how to explain the increasing number of enigmatic hybrid event beds (Haughton et al, 2003;Manica, 2012;Talling et al, 2012) and transitional flow deposits (Baas et al, 2011;Kane and Pontén, 2012) found in deep-marine successions. Such research should rely on the following laboratory-derived constraints for the genesis of intrabed turbidites: (1) presence of stable soft mud; (2) bed shear stress is lower than the critical stress for erosion (cf.…”

Section: Model Applicationsmentioning

confidence: 98%

Processes and products of turbidity currents entering soft muddy substrates

Baas¹,

Manica²,

Puhl³

et al. 2014

Geology

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New laboratory experiments reveal that cohesionless turbidity currents are able to enter cohesive soft muddy substrates without losing their shape. These intrabed currents are driven by bed shear stress exceeding bed cohesive strength, and by flow density exceeding bed density. The flows produce unique turbidites with internal mud layers, mixed cohesive-noncohesive sediment layers, and flame and load structures. A depositional model for intrabed (I) turbidites is proposed, comprising, from base to top: I1-sand-bearing mud, with a scoured base, dispersed mud, and mud clasts; I2-muddy sand from the intrabed portion of the turbidity current; I3-sandy mud with a speckled appearance; and I4-mud-poor sand from the suprabed portion of the flow. Complete I1-I4 turbidites are inferred to dominate locations in nature where the currents mix with the bed and deep erosional scours form, filled with deformed or chaotic sand-mud mixtures. Further downflow, base-missing I2-I4 and I4 sequences signify gradual deceleration, loss of erosivity, and termination of intrabed flow.

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“…H4 may be absent or may wholly or partly have collapsed into the underlying H3 division. Event beds broadly conforming to the hybrid model have been widely documented in cores from hydrocarbon wells (Haughton et al, 2003Barker et al, 2008;Davis et al, 2009;Kane and Ponten, 2012), shallow sea floor cores (Zeng et al,1991;Talling et al, 2007b;Georgiopoulou et al, 2009;Lee et al, 2013) and outcrops (Wood and Smith, 1959;Mutti et al, 1978;Van Vliet, 1978;Ricci Lucchi and Valmori, 1980;Sylvester and Lowe, 2004;Talling et al, 2004;2007a;2012;Amy and Talling, 2006;Ito, 2008;Hodgson, 2009;Jackson et al, 2009;Muzzi Magalhaes and Tinterri, 2010;Tinterri and Muzzi Magalhaes;2011).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…relationships using Walther's Law (Kane and Ponten, 2012). These studies have demonstrated that transitions between turbidites and hybrid event beds can occur either progressively over long distances (many kms) or over shorter length-scales (a km or so; Hodgson, 2009, Patacci et al, 2014, and that the debritic component of the bed (H3 division of Haughton et al 2009) may occur on the fringe of, or in some cases centrally within the wider deposit ( Fig.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Short length-scale variability of hybrid event beds and its applied significance

Fonnesu

Haughton

Felletti

et al. 2015

Marine and Petroleum Geology

107

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Please cite this article as: Fonnesu, M., Haughton, P., Felletti, F., McCaffrey, W., Short length-scale variability of hybrid event beds and its applied significance, Marine and Petroleum Geology (2015), doi: 10.1016/j.marpetgeo.2015.03.028. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Submarine transitional flow deposits in the Paleogene Gulf of Mexico

Cited by 159 publications

References 20 publications

Seismic modeling in the analysis of deep-water sandstone termination styles

Seismic modeling in the analysis of deep-water sandstone termination styles

Processes and products of turbidity currents entering soft muddy substrates

Short length-scale variability of hybrid event beds and its applied significance

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