Recent bright gully deposits on Mars: Wet or dry flow?

Jon Pelletier, Kelly J. Kolb, Alfred S. McEwen, Randy L. Kirk

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

Bright gully sediments attributed to liquid water flow have been deposited on Mars within the past several years. To test the liquid water flow hypothesis, we constructed a high-resolution (1 m/pixel) photogrammetric digital elevation model of a crater in the Centauri Montes region, where a bright gully deposit formed between 2001 and 2005. We conducted one-dimensional (1-D) and 2-D numerical flow modeling to test whether the deposit morphology is most consistent with liquid water or dry granular How. Liquid water flow models that incorporate freezing can match the runout distance of the flow for certain freezing rates but fail to reconstruct the distributary lobe morphology of the distal end of the deposit. Dry granular flow models can match both the observed runout distance and the distal morphology. Wet debris flows with high sediment concentrations are also consistent with the observed morphology because their rheologies are often similar to that of dry granular flows. As such, the presence of liquid water in this flow event cannot be ruled out, but the available evidence is consistent with dry landsliding.

Original languageEnglish (US)
Pages (from-to)211-214
Number of pages4
JournalGeology
Volume36
Issue number3
DOIs
StatePublished - Mar 2008

Fingerprint

gully
Mars
liquid
water flow
freezing
flow modeling
debris flow
sediment
crater
digital elevation model
pixel
water
test

Keywords

  • Fluvial
  • Mars
  • Mass wasting
  • Numerical model

ASJC Scopus subject areas

  • Geology

Cite this

Recent bright gully deposits on Mars : Wet or dry flow? / Pelletier, Jon; Kolb, Kelly J.; McEwen, Alfred S.; Kirk, Randy L.

In: Geology, Vol. 36, No. 3, 03.2008, p. 211-214.

Research output: Contribution to journalArticle

Pelletier, Jon ; Kolb, Kelly J. ; McEwen, Alfred S. ; Kirk, Randy L. / Recent bright gully deposits on Mars : Wet or dry flow?. In: Geology. 2008 ; Vol. 36, No. 3. pp. 211-214.
@article{068d3a3364cd4991b5168530cce40f57,
title = "Recent bright gully deposits on Mars: Wet or dry flow?",
abstract = "Bright gully sediments attributed to liquid water flow have been deposited on Mars within the past several years. To test the liquid water flow hypothesis, we constructed a high-resolution (1 m/pixel) photogrammetric digital elevation model of a crater in the Centauri Montes region, where a bright gully deposit formed between 2001 and 2005. We conducted one-dimensional (1-D) and 2-D numerical flow modeling to test whether the deposit morphology is most consistent with liquid water or dry granular How. Liquid water flow models that incorporate freezing can match the runout distance of the flow for certain freezing rates but fail to reconstruct the distributary lobe morphology of the distal end of the deposit. Dry granular flow models can match both the observed runout distance and the distal morphology. Wet debris flows with high sediment concentrations are also consistent with the observed morphology because their rheologies are often similar to that of dry granular flows. As such, the presence of liquid water in this flow event cannot be ruled out, but the available evidence is consistent with dry landsliding.",
keywords = "Fluvial, Mars, Mass wasting, Numerical model",
author = "Jon Pelletier and Kolb, {Kelly J.} and McEwen, {Alfred S.} and Kirk, {Randy L.}",
year = "2008",
month = "3",
doi = "10.1130/G24346A.1",
language = "English (US)",
volume = "36",
pages = "211--214",
journal = "Geology",
issn = "0091-7613",
publisher = "Geological Society of America",
number = "3",

}

TY - JOUR

T1 - Recent bright gully deposits on Mars

T2 - Wet or dry flow?

AU - Pelletier, Jon

AU - Kolb, Kelly J.

AU - McEwen, Alfred S.

AU - Kirk, Randy L.

PY - 2008/3

Y1 - 2008/3

N2 - Bright gully sediments attributed to liquid water flow have been deposited on Mars within the past several years. To test the liquid water flow hypothesis, we constructed a high-resolution (1 m/pixel) photogrammetric digital elevation model of a crater in the Centauri Montes region, where a bright gully deposit formed between 2001 and 2005. We conducted one-dimensional (1-D) and 2-D numerical flow modeling to test whether the deposit morphology is most consistent with liquid water or dry granular How. Liquid water flow models that incorporate freezing can match the runout distance of the flow for certain freezing rates but fail to reconstruct the distributary lobe morphology of the distal end of the deposit. Dry granular flow models can match both the observed runout distance and the distal morphology. Wet debris flows with high sediment concentrations are also consistent with the observed morphology because their rheologies are often similar to that of dry granular flows. As such, the presence of liquid water in this flow event cannot be ruled out, but the available evidence is consistent with dry landsliding.

AB - Bright gully sediments attributed to liquid water flow have been deposited on Mars within the past several years. To test the liquid water flow hypothesis, we constructed a high-resolution (1 m/pixel) photogrammetric digital elevation model of a crater in the Centauri Montes region, where a bright gully deposit formed between 2001 and 2005. We conducted one-dimensional (1-D) and 2-D numerical flow modeling to test whether the deposit morphology is most consistent with liquid water or dry granular How. Liquid water flow models that incorporate freezing can match the runout distance of the flow for certain freezing rates but fail to reconstruct the distributary lobe morphology of the distal end of the deposit. Dry granular flow models can match both the observed runout distance and the distal morphology. Wet debris flows with high sediment concentrations are also consistent with the observed morphology because their rheologies are often similar to that of dry granular flows. As such, the presence of liquid water in this flow event cannot be ruled out, but the available evidence is consistent with dry landsliding.

KW - Fluvial

KW - Mars

KW - Mass wasting

KW - Numerical model

UR - http://www.scopus.com/inward/record.url?scp=44449151972&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=44449151972&partnerID=8YFLogxK

U2 - 10.1130/G24346A.1

DO - 10.1130/G24346A.1

M3 - Article

AN - SCOPUS:44449151972

VL - 36

SP - 211

EP - 214

JO - Geology

JF - Geology

SN - 0091-7613

IS - 3

ER -