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报告编号N20050167021
Alluvial Fans on Dunes in Kaiser Crater Suggest Niveo-Aeolian and Denivation Processes on Mars.
Bourke, M. C.
英文摘要On Earth, cold region sand dunes often contain inter-bedded sand, snow, and ice. These mixed deposits of wind-driven snow, sand, silt, vegetal debris, or other detritus have been termed Niveo-aeolian deposits. These deposits are often coupled with features that are due to melting or sublimation of snow, called denivation features. Snow and ice may be incorported into dunes on Mars in three ways. Diffusion of water vapour into pore spaces is the widely accepted mechanism for the accretion of premafrost ice. Additional mechanisms may include the burial by sand of snow that has fallen on the dune surface or the synchronous transportation and deposition of snow, sand and ice. Both of these mechanisms have been reported for polar dunes on Earth. Niveo-aeolian deposits in polar deserts on Earth have unique morphologies and sedimentary structures that are generally not found in warm desert dunes. Recent analysis of MOC-scale data have found evidence for potential niveo-aeolian and denivation deposits in sand dunes on Mars.
英文关键词Mars(Planet) Sand dunes Planetary geology Alluvial fans Snow Ice Polar areas Alaska Kaiser crater
出版年2005
语种英语
国家United Kingdom
URLhttp://r.cnki.net/KCMS/detail/detail.aspx?DbCode=KJBG&dbname=KJBGW&filename=5a00362531c97d1c389720e6
来源机构National Aeronautics and Space Administration
资源类型科技报告
条目标识符http://119.78.100.177/qdio/handle/2XILL650/273362
推荐引用方式
GB/T 7714		 Bourke, M. C.. Alluvial Fans on Dunes in Kaiser Crater Suggest Niveo-Aeolian and Denivation Processes on Mars.,2005.
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