Morphometry of mass-transport deposits as a predictive tool

Moscardelli, Lorena; Wood, Lesli J.

doi:10.1130/b31221.1

Cited by 97 publications

(148 citation statements)

References 75 publications

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“…8E). Moscardelli and Wood (2015) documented a relationship between the dimension of MTDs and their origins. They show that detached MTDs are relatively smaller compared to shelf-and slope-attached MTDs (Moscardelli and Wood 2015).…”

Section: Mass-transport Deposit (Mtd A)---this Unit Is Composed Chiementioning

confidence: 99%

“…Moscardelli and Wood (2015) documented a relationship between the dimension of MTDs and their origins. They show that detached MTDs are relatively smaller compared to shelf-and slope-attached MTDs (Moscardelli and Wood 2015). The results of this work are consistent with the relationship observed by Moscardelli and Wood (2015), as the area and length of MTD A plot into the area-length cluster of points for detached MTDs (Fig.…”

Section: Mass-transport Deposit (Mtd A)---this Unit Is Composed Chiementioning

confidence: 99%

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The Role of Mass Wasting In the Progressive Development Of Submarine Channels (Espírito Santo Basin, Se Brazil)

Qin

Alves

Constantine

et al. 2017

Journal of Sedimentary Research

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ABSTRACT:A Pliocene-Quaternary submarine channel system, influenced by a localized mass wasting, is investigated in this work using high-resolution 3D seismic data from offshore Espírito Santo Basin, SE Brazil. Three abandoned channels, a channel belt and an mass-transport deposit (MTD) are recognized in the channel system within a confluence region confined by salt diapirs. In this confluence region, the cross-sectional area (CSA) of the channel system can be up to 1.2 km 2 , i.e., 4 to 10 times larger than CSA in other parts of the channel system. Such significant changes in the architecture and morphology of the channel system resulted from the interaction between mass-wasting processes and turbidity flows. We postulate that a basal erosional scar was created by mass-wasting processes and was filled with an MTD. This basal scar was then used as a preferential pathway for turbidity flows, which were captured by its headwall and lateral margins. The interpreted data shows that the captured turbidity flows greatly widened the basal scar, but caused only small modifications in scar height. Part of the MTD within the basal scar was removed downslope by turbidity flows, and was replaced by channel-fill deposits. This paper shows a flow-capture process occurred in a confluence region on continental slope. Basal scars can capture turbidity flows and facilitate flow channelization, which is a key process for submarine-channel initiation. The replacement of MTD by channel-fill deposits has profound implications for reservoir volumes and net-to-gross ratios in channel systems and partly depends on the turbidity-flows properties, such as their erosive ability and frequency. The more erosive and frequent flows are captured by the basal scar, the larger is the accommodation space created for succeeding sand-prone turbidites.

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Section: Mass-transport Deposit (Mtd A)---this Unit Is Composed Chiementioning

confidence: 99%

Section: Mass-transport Deposit (Mtd A)---this Unit Is Composed Chiementioning

confidence: 99%

The Role of Mass Wasting In the Progressive Development Of Submarine Channels (Espírito Santo Basin, Se Brazil)

Qin

Alves

Constantine

et al. 2017

Journal of Sedimentary Research

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“…The MTC has a run-out distance of about 12 km to the location of the AT349-2 well; fairly short for MTCs (Moscardelli and Wood, 2015). Based on these morphometric parameters and seismic characteristics, the top-seal MTC is interpreted to be of detached style according to the classification devised by Moscardelli and Wood (2008), and its low-amplitude and chaotic seismic character is suggestive of a predominantly mud-prone composition (Posamentier and Kolla, 2003).…”

Section: The Top-seal Mtcmentioning

confidence: 99%

“….........41 Table 2: XRPD bulk mineralogy (weight %) of samples from AT349-2 well core Figure 1.1: Classification of gravity-induced deposits employed in this study after Moscardelli and Wood (2008). Compiled from Dott (1963), Nardin et al (1979), and Moscardelli et al (2006) Moscardelli and Wood (2015) showcasing the main differences between attached and detached MTCs in terms of causal mechanisms and scales (area versus length log-log plot). .....12 …”

Section: List Ofmentioning

confidence: 99%

“…Equally important, this approach can be employed to detect seal bypass systems in MTCs -term defined by as seismically resolvable geological features embedded within sealing sequences that promote cross-strata fluid migration and allow fluids to bypass the pore network. Moscardelli and Wood (2015) showcasing the main differences between attached and detached MTCs in terms of causal mechanisms and scales (area versus length log-log plot).…”

Section: Architecture Of Mtcs and Implications For Seal Potentialmentioning

confidence: 99%

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Fabric Development and Pore-Throat Reduction in a Mass-Transport Deposit in the Jubilee Gas Field, Eastern Gulf of Mexico: Consequences for the Sealing Capacity of MTDs

Cardona

Wood

Day-Stirrat

et al. 2016

Advances in Natural and Technological Hazards Research

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Elevated shear strength of sediments on active margins: Evidence for seismic strengthening

Sawyer

DeVore

2015

Geophysical Research Letters

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Earthquakes are a primary trigger of submarine landslides, yet some of the most seismically active areas on Earth show a surprisingly low frequency of submarine landslides. Here we show that within the uppermost 100 m below seafloor (mbsf) in previously unfailed sediment, active margins have elevated shear strength by a factor of 2–3 relative to the same interval on passive margins. The elevated shear strength is seen in a global survey of undrained shear strength with depth as well as a normalized analysis that accounts for lithology and stress state. The enhanced shear strength is highest within the uppermost 10 mbsf. These results indicate that large areas of modern day slopes on active margins have enhanced slope stability, which may explain the relative paucity of landslides. These findings lend support to the seismic strengthening hypothesis that the repeated exposure to earthquake energy gradually increases shear strength by shear‐induced compaction.

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Morphometry of mass-transport deposits as a predictive tool

Cited by 97 publications

References 75 publications

The Role of Mass Wasting In the Progressive Development Of Submarine Channels (Espírito Santo Basin, Se Brazil)

The Role of Mass Wasting In the Progressive Development Of Submarine Channels (Espírito Santo Basin, Se Brazil)

Fabric Development and Pore-Throat Reduction in a Mass-Transport Deposit in the Jubilee Gas Field, Eastern Gulf of Mexico: Consequences for the Sealing Capacity of MTDs

Elevated shear strength of sediments on active margins: Evidence for seismic strengthening

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