Lowstand Deltas and a Basin-Floor Fan, Pleistocene, Offshore East Kalimantan, Indonesia

Sailer, Arthur H.; Noah, Jesse T.; Schneider, Rhys; Ruzuar, Alif Prama

doi:10.5724/gcs.03.23.0421

Cited by 7 publications

(7 citation statements)

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“…The fan, including LE3, has been imaged and interpreted multiple times (Posamentier et al, 2000;Fowler et al, 2001;Posamentier and Kolla, 2003;Saller et al, 2003;Saller et al, 2004;Ruzuar et al, 2005;Saller et al, 2008;Saller et al, 2010). The fan was deposited in association with a sea level lowstand about 240 ka (Saller et al, 2004).…”

Section: Lobate Example 3: a Channelized Lobate Deposit With Few Distributariesmentioning

confidence: 99%

“…Sediment transport is from northwest to southeast. The locations of seismic cross sections in and followed immediately by substantial mass transport deposits (Posamentier et al, 2000;Fowler et al, 2001;Posamentier and Kolla, 2003;Saller et al, 2003;Saller et al, 2004;Ruzuar et al, 2005;Saller et al, 2008;Saller et al, 2010).…”

Section: Lobate Example 3: a Channelized Lobate Deposit With Few Distributariesmentioning

confidence: 99%

“…Deposition, avulsion and abandonment of each lobate body resulted in the progressive basinward offset of successive lobate deposits and progradation of the system. The youngest expression of the channel-levee complex culminated with a terminal lobate deposit (Posamentier et al, 2000;Fowler et al, 2001;Posamentier and Kolla, 2003;Saller et al, 2003;Saller et al, 2004;Ruzuar et al, 2005;Saller et al, 2008;Saller et al, 2010). At least one mass transport complex (MTC) was deposited within the fan during progradation (Posamentier and Kolla, 2003;Saller et al, 2008) and a younger MTC eroded the southern edge of LE3 (Figure 8).…”

Section: Lobate Example 3: a Channelized Lobate Deposit With Few Distributariesmentioning

confidence: 99%

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Architectural Diversity of Submarine Lobate Deposits

2021

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Lobate deposits in deep-water settings are diverse in their depositional architecture but this diversity is under-represented in the literature. Diverse architectures result from multiple factors including source material, basin margin physiography, transport pathway, and depositional setting. In this contribution, we emphasize the impact of differing source materials related to differing delivery mechanisms and their influence on architecture, which is an important consideration in source-to-sink studies. Three well imaged subsurface lobate deposits are described that display three markedly different morphologies. All three lobate examples, two from intraslope settings offshore Nigeria and one from a basin-floor setting offshore Indonesia, are buried by less than 150 m of muddy sediment and are imaged with high resolution 3D reflection seismic data of similar quality and resolution. Distinctively different distributary channel patterns are present in two of the examples, and no comparable distributaries are imaged in a third example. Distributary channels are emphasized because they are objectively recognized and because they often represent elements of elevated fluid content within buried lobate deposits and thus influence permeability structure. We speculate that the different distributary channel patterns documented here resulted from different processes linked to source materials: 1) a lobate deposit that is pervasively channelized by many distributaries that have branched at numerous points is interpreted to result from comparatively mud-rich, stratified, turbulent flows; 2) an absence of distributaries in a lobate deposit is interpreted to result from collapse of mud-poor, turbulent flows remobilized from littoral drift; and 3) a lobate deposit with only a few, long, straight distributaries with few branching points is interpreted to be dominated by highly viscous flows (i.e., debris flows). We propose a conceptual model that illustrates the relationship between the proportion of mud in contributing flows and the relative size and runout distance of lobate deposits. We conclude that reconciling 3D seismic morphologies with outcrop observations of channels, scours, and amalgamation zones, and simple application of hierarchical schemes, is problematic. Furthermore, when characterizing unconfined deep-water deposits in the subsurface, multiple models with significant differences in predicted permeability structure should be considered.

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Section: Lobate Example 3: a Channelized Lobate Deposit With Few Distributariesmentioning

confidence: 99%

Section: Lobate Example 3: a Channelized Lobate Deposit With Few Distributariesmentioning

confidence: 99%

Section: Lobate Example 3: a Channelized Lobate Deposit With Few Distributariesmentioning

confidence: 99%

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Architectural Diversity of Submarine Lobate Deposits

2021

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“…The fan, including Lobate Example 3, has been imaged and interpreted multiple times (Posamenier et al, 2000;Fowler et al, 2001;Posamentier and Kolla, 2003;Saller et al, 2003Saller et al, , 2004Saller et al, , 2008Saller et al, and 2010and Ruzuar et al, 2005). The fan was deposited in association with a sea level lowstand about 240 thousand years ago (Saller et al, 2004).…”

Section: Example 3: a Channelized Lobate Deposit With Few Avulsions 4...mentioning

confidence: 99%

“…The fan was deposited in association with a sea level lowstand about 240 thousand years ago (Saller et al, 2004). The submarine fan was both preceded and followed immediately by substantial mass transport deposits (Posamenier et al, 2000;Fowler et al, 2001;Posamentier and Kolla, 2003;Saller et al, 2003Saller et al, , 2004Saller et al, , 2008Saller et al, and 2010and Ruzuar et al, 2005).…”

Section: Example 3: a Channelized Lobate Deposit With Few Avulsions 4...mentioning

confidence: 99%

McHargue et al Architectural Diversity of Submarine Lobes

McHargue¹,

Hodgson²,

Shelef³

2019

Preprint

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The most popular model for submarine unconfined lobate deposits has the following attributes: (1) a single feeder channel that delivers sediment, (2) a set of distributary channels present only in the proximal part of the lobate body, and (3) unchannelized tabular deposits present in the middle and distal part of the lobate deposit. This model has become a standard to guide interpretation of outcrop and subsurface examples of submarine lobate deposits. In this contribution, three well imaged subsurface lobate deposits are described that display three markedly different morphologies, all of which differ from the “standard” model. All three lobate examples are buried by less than 150m of muddy sediment and imaged with high resolution 3D reflection seismic data of similar quality and resolution. Distinctively different distributary channel patterns are present in two of the examples, and no distributaries are imaged in a third example. We conclude that if channels are not imaged, it is because channels are not present. The different distributary channel patterns are interpreted to have resulted from different processes: (1) a lobate deposit that is pervasively channelized by many distributaries that have avulsed from numerous nodes is interpreted to result from mud-rich, stratified, turbulent flows ; (2) an absence of distributaries in a lobate deposit is interpreted to result from collapse of mud-poor, turbulent flows remobilized from littoral drift; and (3) a lobate deposit with only a few, long, straight distributaries without avulsions is interpreted to be dominated by debris flows (laminar flows) . Reconciling 3D seismic morphologies with observations of channels, scours, and amalgamation zones in outcrops is problematic. It is concluded from this study that, when characterizing unconfined deep water deposits, multiple models with significant differences in predicted permeability structure should be considered.

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Deepwater Deposits and Reservoirs

Slatt¹

2013

Developments in Petroleum Science

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Lowstand Deltas and a Basin-Floor Fan, Pleistocene, Offshore East Kalimantan, Indonesia

Cited by 7 publications

References 0 publications

Architectural Diversity of Submarine Lobate Deposits

Architectural Diversity of Submarine Lobate Deposits

McHargue et al Architectural Diversity of Submarine Lobes

Deepwater Deposits and Reservoirs

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