Formation of martian araneiforms by gas-driven erosion of granular material
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Standard
Formation of martian araneiforms by gas-driven erosion of granular material. / de Villiers, S.; Nermoen, A.; Jamtveit, B.; Mathiesen, Joachim; Meakin, P.; Werner, S.C.
I: Geophysical Research Letters, Bind 39, 02.07.2012, s. L13204.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Formation of martian araneiforms by gas-driven erosion of granular material
AU - de Villiers, S.
AU - Nermoen, A.
AU - Jamtveit, B.
AU - Mathiesen, Joachim
AU - Meakin, P.
AU - Werner, S.C.
PY - 2012/7/2
Y1 - 2012/7/2
N2 - Sublimation at the lower surface of a seasonal sheet of translucent CO2 ice at high southern latitudes during the Martian spring, and rapid outflow of the CO2 gas generated in this manner through holes in the ice, has been proposed as the origin of dendritic 100 m–1 km scale branched channels known as spiders or araneiforms and dark dust fans deposited on top of the ice. We show that patterns very similar to araneiforms are formed in a Hele-Shaw cell filled with an unconsolidated granular material by slowly deforming the upper wall upward and allowing it to return rapidly to its original position to drive air and entrained particles through a small hole in the upper wall. Straight, braided and quasiperiodic oscillating channels, unlike meandering channels on Earth were also formed
AB - Sublimation at the lower surface of a seasonal sheet of translucent CO2 ice at high southern latitudes during the Martian spring, and rapid outflow of the CO2 gas generated in this manner through holes in the ice, has been proposed as the origin of dendritic 100 m–1 km scale branched channels known as spiders or araneiforms and dark dust fans deposited on top of the ice. We show that patterns very similar to araneiforms are formed in a Hele-Shaw cell filled with an unconsolidated granular material by slowly deforming the upper wall upward and allowing it to return rapidly to its original position to drive air and entrained particles through a small hole in the upper wall. Straight, braided and quasiperiodic oscillating channels, unlike meandering channels on Earth were also formed
U2 - 10.1029/2012GL052226
DO - 10.1029/2012GL052226
M3 - Journal article
VL - 39
SP - L13204
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
ER -
ID: 43209676