Dynamics of unusual debris flows on Martian sand dunes

Hideaki Miyamoto; James M. Dohm; Victor R. Baker; Ross A. Beyer; Mary Bourke

doi:10.1029/2004GL020313

Dynamics of unusual debris flows on Martian sand dunes

Hideaki Miyamoto, James M. Dohm, Victor R. Baker, Ross A. Beyer, Mary Bourke

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35 Scopus citations

Abstract

Gullies that dissect sand dunes in Russell impact crater often display debris flow-like deposits in their distal reaches. The possible range of both the rheological properties and the flow rates are estimated using a numerical simulation code of a Bingham plastic flow to help explain the formation of these features. Our simulated results are best explained by a rapid debris flow. For example, a debris flow with the viscosity of 10² Pa s and the yield strength of 10² Pa can form the observed deposits with a flow rate of 0.5 m³/s sustained over several minutes and total discharged water volume on the order of hundreds of cubic meters, which may be produced by melting a surface layer of interstitial ice within the dune deposits to several centimeters depth.

Original language	English (US)
Pages (from-to)	L13701 1-4
Journal	Geophysical Research Letters
Volume	31
Issue number	13
DOIs	https://doi.org/10.1029/2004GL020313
State	Published - Jul 16 2004

ASJC Scopus subject areas

Geophysics
General Earth and Planetary Sciences

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10.1029/2004GL020313

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abstract = "Gullies that dissect sand dunes in Russell impact crater often display debris flow-like deposits in their distal reaches. The possible range of both the rheological properties and the flow rates are estimated using a numerical simulation code of a Bingham plastic flow to help explain the formation of these features. Our simulated results are best explained by a rapid debris flow. For example, a debris flow with the viscosity of 102 Pa s and the yield strength of 102 Pa can form the observed deposits with a flow rate of 0.5 m3/s sustained over several minutes and total discharged water volume on the order of hundreds of cubic meters, which may be produced by melting a surface layer of interstitial ice within the dune deposits to several centimeters depth.",

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AU - Miyamoto, Hideaki

AU - Dohm, James M.

AU - Baker, Victor R.

AU - Beyer, Ross A.

AU - Bourke, Mary

PY - 2004/7/16

Y1 - 2004/7/16

N2 - Gullies that dissect sand dunes in Russell impact crater often display debris flow-like deposits in their distal reaches. The possible range of both the rheological properties and the flow rates are estimated using a numerical simulation code of a Bingham plastic flow to help explain the formation of these features. Our simulated results are best explained by a rapid debris flow. For example, a debris flow with the viscosity of 102 Pa s and the yield strength of 102 Pa can form the observed deposits with a flow rate of 0.5 m3/s sustained over several minutes and total discharged water volume on the order of hundreds of cubic meters, which may be produced by melting a surface layer of interstitial ice within the dune deposits to several centimeters depth.

AB - Gullies that dissect sand dunes in Russell impact crater often display debris flow-like deposits in their distal reaches. The possible range of both the rheological properties and the flow rates are estimated using a numerical simulation code of a Bingham plastic flow to help explain the formation of these features. Our simulated results are best explained by a rapid debris flow. For example, a debris flow with the viscosity of 102 Pa s and the yield strength of 102 Pa can form the observed deposits with a flow rate of 0.5 m3/s sustained over several minutes and total discharged water volume on the order of hundreds of cubic meters, which may be produced by melting a surface layer of interstitial ice within the dune deposits to several centimeters depth.

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Dynamics of unusual debris flows on Martian sand dunes

Abstract

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