Formation of Martian araneiforms by gas-driven erosion of granular material

被引：17

作者：

de Villiers, S. ^{[1
]}

Nermoen, A. ^{[1
]}

Jamtveit, B. ^{[1
]}

Mathiesen, J. ^{[1
,2
]}

Meakin, P. ^{[1
,3
,4
]}

Werner, S. C. ^{[1
,5
]}

机构：

[1] Univ Oslo, Blindern, Norway

[2] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark

[3] Idaho Natl Lab, Carbon Resource Management Dept, Idaho Falls, ID 83415 USA

[4] Inst Energy Technol, Multiphase Flow Assurance Innovat Ctr, N-2007 Kjeller, Norway

[5] Acad Sci & Letters, Ctr Adv Study, Oslo, Norway

来源：

GEOPHYSICAL RESEARCH LETTERS | 2012年 / 39卷

关键词：

HIRISE OBSERVATIONS; SUBLIMATION; ICE;

D O I：

10.1029/2012GL052226

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

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. Citation: de Villiers, S., A. Nermoen, B. Jamtveit, J. Mathiesen, P. Meakin, and S. C. Werner (2012), Formation of Martian araneiforms by gas-driven erosion of granular material, Geophys. Res. Lett., 39, L13204, doi:10.1029/2012GL052226.

引用

页数：5

共 20 条

[1]

[Anonymous], 1998, Fractals, scaling and growth far from equilibrium

[2] Insights in erosion instabilities in nonconsolidated porous media [J].