Experimental And Analytical Study Of Creep Deformations Of Submarine Slopes

Silva, A.J.; Brandes, Horst G.; Sadd, Martin H.; Karamanlidis, Dimitrios; Tian, W.-M.; Laine, E

doi:10.1109/oceans.1989.587112

Cited by 2 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several workers have suggested that subseabed geotechnical properties may allow gravity-influenced deformation and modification of continental slope deposits at rauch smaller strains than those that characterize mass movement (Hill et al 1982;Booth et al 1984;Silva et al 1989). In these instances, shallow sediments on or beneath the continental slope may deform by creep within weak or incompetent layers.…”

Section: Introdu¢tionmentioning

confidence: 99%

Proposed criteria for recognizing intrastratal deformation features in marine high resolution seismic reflection profiles

O’Leary

Laine

1996

Geo-Marine Letters

View full text Add to dashboard Cite

Intrastratal deformation of marine strata is ordinarily recorded in high-resolution seismic reflection profiles as acoustically transparent or "chaotic" intervals marked by hyperbolic echoes. Intrastratal deformation is easily confused with buried slump or slide deposits formed initially at the sea ftoor. Correct identification of intrastratal deformation depends on the presence of a warped continuously reflective layer overlying a chaotic/transparent layer. Decollement is the key criterion for identification in seismic reflection profiles. Other criteria inctude intrusive structures or faults rooted in a chaotic/transparent layer and thickening and thinning of a chaotic/transparent layer with transitions to reflective intervals.

show abstract

Section: Introdu¢tionmentioning

confidence: 99%

Proposed criteria for recognizing intrastratal deformation features in marine high resolution seismic reflection profiles

O’Leary

Laine

1996

Geo-Marine Letters

View full text Add to dashboard Cite

show abstract

“…Creep on subaqueous slopes is poorly studied and rarely identified compared to other mass-transport processes, though exceptions include Carter and Lindqvist (1975), Hill et al (1982), Silva and Booth (1984), Silva et al (1989), and Lee and Chough (2001). The reason may be that creep is an extremely slow process (movements on the order of a few millimeters to centimeters a year), and that effects can be difficult to observe.…”

Section: Creepmentioning

confidence: 99%

The Character and Genesis of Submarine Mass-Transport Deposits: Insights from Outcrop and 3D Seismic Data

Posamentier¹,

Martinsen²

2011

Mass-Transport Deposits in Deepwater Settings

108

139

View full text Add to dashboard Cite

Extensive deep-water mass-transport deposits are observed both in slope and basin-floor settings. A detailed understanding of mass-transport deposits, in terms of emplacement processes, depositional products, and their stratigraphic and geographic distribution, is vital because they can constitute a significant portion of the stratigraphic section in deep-water settings. In addition, mass-transport deposits can play a significant role in hydrocarbon exploration, inasmuch as they can constitute seal, reservoir, and possibly source facies under the right circumstances. Different data types bring to light different aspects of mass-transport deposits. This paper focuses on insights derived from seismic and outcrop data. Overall geometries and architecture of mass-transport deposits are readily observable in 3D seismic data; however, features below seismic resolution that are vital for process and lithologic understanding need to be observed in outcrop. Integrating observations across a broad range of scales by linking seismic and outcrop observations constitutes an effective way of improving our understanding of when and where mass-transport deposits are likely to form. In addition, this linkage sheds light on details of internal architecture that commonly characterizes these deposits. Mass-transport deposits can comprise sheets, lobes, and channels fills, and reach 150 m or more in thickness. Greater thicknesses are observed where successive flows are amalgamated. This paper documents both internal architectural/stratigraphic as well as external geomorphic attributes of such deposits, as expressed in outcrop and imaged by 3D seismic data. Recognition of mass-transport deposits in outcrop is based on identification of bedding deformed by synsedimentary processes, with deformation ranging from minimal redistribution of large slide blocks to complete disaggregation typical of debris-flow deposits. On seismic data, mass-transport deposits can be recognized by certain geomorphologic as well as stratigraphic distinguishing characteristics: basal linear grooved and scoured surfaces, hummocky relief at the top, and internal chaotic to transparent seismic facies, with internal thrust faulting common.

show abstract

Experimental And Analytical Study Of Creep Deformations Of Submarine Slopes

Cited by 2 publications

References 9 publications

Proposed criteria for recognizing intrastratal deformation features in marine high resolution seismic reflection profiles

Proposed criteria for recognizing intrastratal deformation features in marine high resolution seismic reflection profiles

The Character and Genesis of Submarine Mass-Transport Deposits: Insights from Outcrop and 3D Seismic Data

Contact Info

Product

Resources

About