Inclusion of Substrate Blocks Within a Mass Transport Deposit: A Case Study from Cerro Bola, Argentina

Sobiesiak, Matheus S.; Kneller, Ben; Alsop, G. Ian; Milana, Juan Pablo

doi:10.1007/978-3-319-20979-1_49

Cited by 14 publications

(28 citation statements)

References 17 publications

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“…Over the last decades, several outcrop studies focusing on the internal architecture of MTDs have been undertaken in order to investigate processes occurring during the transport and emplacement of the failed material. These studies, which have mostly been carried out in siliciclastic systems and only rarely in carbonate systems (Pickering, 1987;Lucente & Pini, 2003;Pickering & Corregidor, 2005;Van Der Merwe et al, 2009, 2011Butler & McCaffrey, 2010;Ogata et al, 2014), indicate that MTDs move along a basal detachment surface that may either follow the bedding plane (Strachan, 2002;Van Der Merwe et al, 2011) or plough through the underlying beds incorporating the underlying material into the moving mass (Strachan, 2008;Ogata et al, 2012;Sobiesiak et al, 2016). Internally, gravity-driven softsediment deformation processes result in the formation of an array of structures including dip-slip and oblique-slip normal faults (Alsop & Marco, 2012), extensional sedimentary fissures in the upper extensional head (Winterer et al, 1991;Strachan, 2002;Spalluto et al, 2007), and folds, thrusts, ramps and erosional surfaces in the lower compressional part.…”

Section: Introductionmentioning

confidence: 99%

Internal architecture of mass‐transport deposits in basinal carbonates: A case study from southern Italy

et al. 2018

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Submarine mass‐transport deposits represent important stratigraphic heterogeneities within slope and basinal sedimentary successions. A poor understanding of how their distribution and internal architecture affect the fluid flow migration pathway may lead to unexpected compartmentalization issues in reservoir analysis. Studies of modern carbonate mass‐transport deposits mainly focus on large seismic‐scale slope failures; however, the near‐platform basinal depositional environment often hosts mass‐transport deposits of various dimensions. The small‐scale and meso‐scale (metres to several tens of metres) carbonate mass‐transport deposits play a considerable role in distribution of sediment and therefore have an impact on the heterogeneity of the succession. In order to further constrain the geometry and internal architecture of mass‐transport deposits developed in near‐slope basinal carbonates, a structural and sedimentological analysis of sub‐seismic‐scale mass‐transport deposits has been undertaken on the eastern margin of the Apulian carbonate platform in the Gargano Promontory, south‐east Italy. These mass‐transport deposits, that locally comprise a large proportion (50 to 60%) of the base of slope to basinal sediments of the Cretaceous Maiolica Formation, typically display a vertically bipartite character, including debrites and slump deposits of varying volume ratios. A range of brittle and ductile deformation styles developed within distinct bed packages, together with the presence of both chert clasts, folded chert layers and spherical chert nodules, suggest that sediments were at different stages of lithification prior to downslope movement associated with mass‐transport deposits. This study helps elucidate the emplacement processes, frequency and character of subseismic‐scale mass‐transport deposits within the basinal carbonate environment, and thereby reduces the uncertainties in the characterization of subsurface carbonate geofluid reservoirs.

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Section: Introductionmentioning

confidence: 99%

Internal architecture of mass‐transport deposits in basinal carbonates: A case study from southern Italy

et al. 2018

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“…They fade into sand-rich matrix and locally can be mistaken for relic bedding. (Fig 8 c and d) (Sobiesiak et al, 2016). Sand stringers and blebs record a complex deformation history with superimposed compressional and extensional strain histories (Dykstra et al, 2011).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…The sand streaks were classified into two different types according to their shape and behaviour; a) Sand blebs; these are chunks of coherent sand similar to the sandstone blocks (type a). They range in size from ~5-to 80 cm in length and up to 40 cm in width, are detached and have undergone shearing (Fig 8 a and b) (Sobiesiak et al, 2016). b) Sand stringers; these are thin streaks of sand up to ~5 cm thick by 2 to 3 m long.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…In order to evaluate where the described blocks compare with other examples from the literature, we plotted our data against four examples from outcrop and five from the subsurface (Fig 13 d) gathered by (Moscardelli, 2014). Sobiesiak et al, (2016) used our field data to propose a mechanism for the vertical changes in sandstone block size within the MTD. They calculated block's size (square root of block's area) and cross-plotted this against their normalised vertical height (same technique applied for aspect ratio height) (Fig 13 e).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Internal deformation and kinematic indicators within a tripartite mass transport deposit, NW Argentina

Sobiesiak

Kneller

Alsop

et al. 2016

Sedimentary Geology

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J.P. Milana). AbstractThe role of Mass Transport Deposits (MTD's) in redistributing sediment from the shelf-break to deep water is becoming increasingly apparent and important in the study of basins. While seismic analysis may reveal the general morphology of such deposits, it is unable to provide information on the detailed geometry and kinematics of gravity-driven transport owing to the limits of seismic resolution.Outcrop analysis of ancient MTD's may therefore provide critical observations and data regarding the internal deformation and behaviour during slope failure. One such field area where geometry and kinematics are clearly exposed is Cerro Bola in the Paganzo basin of northwestern Argentina. This 8 km strike section exposes a mid to late Carboniferous succession, comprising fluvio-deltaic sediments, turbidites and MTDs. Our work focuses on the main MTD that is up to 180 m thick and is characterized by a silty matrix, containing sandstone blocks and siltstone rafts. Although we consider a single slope failure as the most likely scenario, a possible double failure might also explain the occurrence of a folded turbidite marker in the upper zone of the MTD. The MTD is host to a variety of deformational features such as folding, boudinage, shear zones, allochthonous strata, and secondary fabrics among others. These deformational features vary in intensity, scale and style, both vertically A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT and laterally across the deposit. The vertical variation is the most notable, and the entire deposit can be subdivided into lower, middle and upper zones according to variations in texture and structures, including sandstone blocks, sand streaks and blebs in the matrix, folding on a variety of scales, and shear zones. The middle part of the MTD is characterized by the abundance of siltstone rafts. Various models are proposed for the origin of blocks and rafts within the MTD: erosion of underlying strata; fragmentation of the original protolith; or a mixture of both. Significantly, specific strain cells occur around the blocks, and so the kinematics of deformation structures in the matrix of the MTD are very largely governed by their proximity and position relative to blocks, and may not relate to the overall kinematics of the MTD. This casts serious doubt on the ability to interpret overall movement directions from core or dip-meter data in the subsurface.

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“…Outcrop investigations provide detailed insight into the kinematics (Ogata et al 2016) and internal mixing and structure (Sobiesiak et al 2016) of MTD. Sympathetic to these approaches are fine-scale sedimentological studies that provide a modern context of present day seafloor processes (Postma et al 2016;Sawyer and Hodelka 2016).…”

Section: Part Vii: Mass Transport Deposits In Modern and Outcrop Sedimentioning

confidence: 99%

Submarine Mass Movements and Their Consequences: Progress and Challenges

Lamarche

Mountjoy

Bull

et al. 2016

Submarine Mass Movements and Their Consequences

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This sixth edition of the Submarine Mass Movements and Their Consequences volume, coincident with the seventh eponymous conference includes 61 papers that span a variety of topics and are organized into nine parts as follows:(1) Submarine mass movement in margin construction and economic significance; (2) Failure dynamics from landslide geomorphology; (3) Geotechnical aspects of mass movement; (4) Multidisciplinary case studies; (5) Tectonics and mass movement processes; (6) Fluid flow and gas hydrates, (7) Mass transport deposits in modern and outcrop sedimentology; (8) Numerical and statistical analysis; and, (9) Tsunami generation from slope failure. The breath and quality of this body of work underpins a positive outlook and our enthusiasm for the future direction of research in this area of science as it moves towards ever more detailed analysis and monitoring. We also emphasize in this volume the need to look at mountain-scale

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Inclusion of Substrate Blocks Within a Mass Transport Deposit: A Case Study from Cerro Bola, Argentina

Cited by 14 publications

References 17 publications

Internal architecture of mass‐transport deposits in basinal carbonates: A case study from southern Italy

Internal architecture of mass‐transport deposits in basinal carbonates: A case study from southern Italy

Internal deformation and kinematic indicators within a tripartite mass transport deposit, NW Argentina

Submarine Mass Movements and Their Consequences: Progress and Challenges

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