Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.icarus.2015.09.042 |
Observations of an aeolian landscape: From surface to orbit in Gale Crater | |
Day, Mackenzie; Kocurek, Gary | |
通讯作者 | Day, Mackenzie |
来源期刊 | ICARUS
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ISSN | 0019-1035 |
EISSN | 1090-2643 |
出版年 | 2016 |
卷号 | 280页码:37-71 |
英文摘要 | Landscapes derived solely from aeolian processes are rare on Earth because of the dominance of subaqueous processes. In contrast, aeolian-derived landscapes should typify Mars because of the absence of liquid water, the long exposure times of surfaces, and the presence of wind as the default geomorphic agent. Using the full range of available orbital and Mars Science Laboratory rover Curiosity images, wind-formed features in Gale Crater were cataloged and analyzed in order to characterize the aeolian landscape and to derive the evolution of the crater wind regime over time. Inferred wind directions show a dominance of regional northerly winds over geologic time-scales, but a dominance of topography-driven katabatic winds in modern times. Landscapes in Gale Crater show a preponderance of aeolian features at all spatial scales. Interpreted processes forming these features include first-cycle aeolian abrasion of bedrock, pervasive deflation, organization of available sand into bedforms, abundant cratering, and gravity-driven wasting, all of which occur over a background of slow physical weathering. The observed landscapes are proposed to represent a spectrum of progressive surface denudation from fractured bedrock, to retreating bedrock-capped mesas, to remnant hills capped by bedrock rubble, to desert pavement plains. This model of landscape evolution provides the mechanism by which northerly winds acting over similar to 3 Ga excavated tens of thousands of cubic kilometers of material from the once sediment-filled crater, thus carving the intra-crater moat and exhuming Mount Sharp (Aeolis Mons). The current crater surface is relatively sand starved, indicating that potential sediment deflation from the crater is greater than sediment production, and that most exhumation of Mount Sharp occurred in the ancient geologic past. (C) 2015 Elsevier Inc. All rights reserved. |
英文关键词 | Aeolian processes Mars, surface Cratering |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000384629200004 |
WOS关键词 | GRAVEL-MANTLED MEGARIPPLES ; VARIABLE FEATURES ; MERIDIANI-PLANUM ; ARGENTINEAN PUNA ; MARS ; DUNE ; RIDGES ; EVOLUTION ; ORIGIN ; SYSTEM |
WOS类目 | Astronomy & Astrophysics |
WOS研究方向 | Astronomy & Astrophysics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/193517 |
作者单位 | Univ Texas Austin, Dept Geol Sci, Jackson Sch Geosci, 2275 Speedway Stop C9000, Austin, TX 78712 USA |
推荐引用方式 GB/T 7714 | Day, Mackenzie,Kocurek, Gary. Observations of an aeolian landscape: From surface to orbit in Gale Crater[J],2016,280:37-71. |
APA | Day, Mackenzie,&Kocurek, Gary.(2016).Observations of an aeolian landscape: From surface to orbit in Gale Crater.ICARUS,280,37-71. |
MLA | Day, Mackenzie,et al."Observations of an aeolian landscape: From surface to orbit in Gale Crater".ICARUS 280(2016):37-71. |
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