Dark slope streaks on Mars: Are aqueous processes involved?
Dark slope streaks on Mars: Are aqueous processes involved?
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DOI：
10.1029/2002gl014936
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发表时间：
2002-05-15
影响因子：
5.2
通讯作者：
Maddock, T
中科院分区：
文献类型：
--
作者：
Ferris, JC;Dohm, JM;Maddock, T
[1]深色斜坡条纹的集中出现在火星的赤道纬度，大多数是岩浆驱动的活动占主导地位的地质记录。虽然最初归因于湿泥石流，所有最近发表的关于这些功能的假设集中在过程中，扰乱了一个光明的尘埃地幔暴露出一个黑暗的基板。这些机制调用干物质浪费或风成过程，排除了水的作用。根据地理，地质和形态的考虑，以及从火星轨道相机和火星轨道数据高度计提供的新信息，我们重新研究河流的过程作为一个可行的解释一些黑暗的斜坡条纹。在我们看来，形成黑暗的斜坡条纹，粉尘雪崩和春季放电，两个对比鲜明的过程，代表了一个连续的祖先的端点。这些特征中的一些可能是由干物质消耗或风成过程造成的，一些可能是由河流作用造成的，还有一些可能是由尚未设想的机制造成的。一个春天的排放源形成的黑暗的斜坡条纹有深远的影响，包括火星有限，但目前活跃，河流的过程中，其表面上，以及近地表含水层。
[1] Concentrations of dark slope streaks occur in the equatorial latitudes of Mars, mostly where magmatic-driven activity dominates the geologic record. Although originally ascribed to wet debris flows, all the most recent published hypotheses concerning these features focus on processes which disturb a brighter dusty mantle to expose a darker substrate. These mechanisms invoke dry mass wasting or eolian processes, excluding a role for water. In light of the geographic, geologic, and morphologic considerations, and the new information provided from the Mars Orbital Camera and the Mars Orbital Data Altimeter, we reexamine fluvial processes as a viable explanation for some of the dark slope streaks. In our opinion, two contrasting processes for the formation of dark slope streaks, dust avalanching and spring discharge, represent endpoints on a continuum of progenitors. It may be that some of these features result from dry mass wasting or eolian processes, some from fluvial processes, and some from a mechanism(s) not yet conceived. A spring discharge origin for the formation of the dark slope streaks has profound implications, including Mars having limited, but currently active, fluvial processes acting upon its surface, as well as near-surface aquifers.