The Bengal Fan: morphology, geometry, stratigraphy, history and processes

Curray, Joseph R.; Emmel, Frans J.; Moore, David G.

doi:10.1016/s0264-8172(03)00035-7

Cited by 327 publications

(335 citation statements)

References 37 publications

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“…The Bengal fan is the largest submarine fan on the Earth, which is about 3,000 km long and 1,000 km in width 51 . We estimated the sediment velocity scale for the Bengal fan system using sediment continuity.…”

Section: Methodsmentioning

confidence: 99%

Quantitative bounds on morphodynamics and implications for reading the sedimentary record

2014

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Sedimentary rocks are the archives of environmental conditions and ancient planetary surface processes that led to their formation. Reconstructions of Earth's past surface behaviour from the physical sedimentary record remain controversial, however, in part because we lack a quantitative framework to deconvolve internal dynamics of sediment-transport systems from environmental signal preservation. Internal dynamics of landscapes-a consequence of the coupling between bed topography, sediment transport and flow dynamics (morphodynamics)-result in regular and quasiperiodic landforms that abound on the Earth and other planets. Here, using theory and a data compilation of morphodynamic landforms that span a wide range of terrestrial, marine and planetary depositional systems, we show that the advection length for settling sediment sets bounds on the scales over which internal landscape dynamics operate. These bounds provide a universal palaeohydraulic reconstruction tool on planetary surfaces and allow for quantitative identification of depositional systems that may preserve tectonic, climatic and anthropogenic signals.

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Section: Methodsmentioning

confidence: 99%

Quantitative bounds on morphodynamics and implications for reading the sedimentary record

2014

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“…The BOB is also characterized by the presence of one of the largest submarine fans of the world which extends from 20° N to 7° 40' S over a length of 3000 km (Krishna et al, 2001a;Curray et al, 2003). The BOB has received sediments from different sources since the breakup of eastern Gondwanaland (~130 Ma): initially from the Indian peninsular rivers including the Mahanadi, Krishna-Godavari and Cauvery rivers until Oligocene time (Bastia et al, 2010).…”

Section: Regional Geologic Setting and Evolutionmentioning

confidence: 99%

Lithosphere structure and upper mantle characteristics below the Bay of Bengal

et al. 2016

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SUMMARY:The oceanic lithosphere in the Bay of Bengal (BOB) formed 80 -120 Ma following the breakup of eastern Gondwanaland. Since its formation, it has been affected by the emplacement of two long N-S trending linear aseismic ridges (85 o E and Ninetyeast) and by the loading of ca.20-km of sediments of the Bengal Fan. Here, we present the results of a combined spatial and spectral domain analysis of residual geoid, bathymetry and gravity data constrained by seismic reflection and refraction data. Self-consistent geoid and gravity modeling defined by temperature-dependent mantle densities along a N-S transect in the BOB region revealed that the depth to the Lithosphere-Asthenosphere boundary (LAB) deepens steeply from 77 km in the south to 127 km in north, with the greater thickness being anomalously thick compared to the lithosphere of similar-age beneath the Pacific Ocean. The Geoid-Topography Ratio (GTR) analysis of the 85°E and Ninetyeast ridges indicate that they are compensated at shallow depths.

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“…Sediment cover of the oceanic plate changes dramatically from the northwestern to the southeastern part of the Sunda margin. This is due to the fact that the main sediment supply in this region is derived from the Bengal fan (Curray et al, 2003). With less sediment supply in larger distance to the fan, the size of the accretionary prism decreases steadily to the southeast, so that the Java Trench does not contain any sediment fill along extensive distances (Kopp et al, 2006).…”

Section: Landslide Distributionmentioning

confidence: 99%

Landslide tsunami hazard in the Indonesian Sunda Arc

Brune

Babeyko

Ladage

et al. 2010

Nat. Hazards Earth Syst. Sci.

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Abstract. The Indonesian archipelago is known for the occurrence of catastrophic earthquake-generated tsunamis along the Sunda Arc. The tsunami hazard associated with submarine landslides however has not been fully addressed. In this paper, we compile the known tsunamigenic events where landslide involvement is certain and summarize the properties of published landslides that were identified with geophysical methods. We depict novel mass movements, found in newly available bathymetry, and determine their key parameters. Using numerical modeling, we compute possible tsunami scenarios. Furthermore, we propose a way of identifying landslide tsunamis using an array of few buoys with bottom pressure units.

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The Bengal Fan: morphology, geometry, stratigraphy, history and processes

Cited by 327 publications

References 37 publications

Quantitative bounds on morphodynamics and implications for reading the sedimentary record

Quantitative bounds on morphodynamics and implications for reading the sedimentary record

Lithosphere structure and upper mantle characteristics below the Bay of Bengal

Landslide tsunami hazard in the Indonesian Sunda Arc

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