DOI: 10.1002/2014GL062553
论文题名: Mineralogy and fluvial history of the watersheds of Gale, Knobel, and Sharp craters: A regional context for the Mars Science Laboratory Curiosity's exploration
作者: Ehlmann B.L. ; Buz J.
刊名: Geophysical Research Letters
ISSN: 0094-9031
EISSN: 1944-8762
出版年: 2015
卷: 42, 期: 2 起始页码: 264
结束页码: 273
语种: 英语
英文关键词: chlorides
; clay mineralogy
; fluvial activity
; MSL
; olivine bedrock
; sediment provenance
Scopus关键词: Chloride minerals
; Chlorine compounds
; Landforms
; Martian surface analysis
; Minerals
; Olivine
; Salts
; Sediments
; Silicate minerals
; Silicates
; Watersheds
; Chlorides
; Clay mineralogy
; Exploration targets
; Mars science laboratory
; MSL
; Sediment provenance
; Temporal differences
; Water chemistry
; Clay minerals
; crater
; dune
; Mars
; Martian atmosphere
; sediment property
; topography
; water chemistry
; watershed
; Hesperia
英文摘要: A 500km long network of valleys extends from Herschel crater to Gale, Knobel, and Sharp craters. The mineralogy and timing of fluvial activity in these watersheds provide a regional framework for deciphering the origin of sediments of Gale crater's Mount Sharp, an exploration target for the Curiosity rover. Olivine-bearing bedrock is exposed throughout the region, and its erosion contributed to widespread olivine-bearing sand dunes. Fe/Mg phyllosilicates are found in both bedrock and sediments, implying that materials deposited in Gale crater may have inherited clay minerals, transported from the watershed. While some topographic lows of the Sharp-Knobel watershed host chloride salts, the only salts detected in the Gale watershed are sulfates within Mount Sharp, implying regional or temporal differences in water chemistry. Crater counts indicate progressively more spatially localized aqueous activity: large-scale valley network activity ceased by the early Hesperian, though later Hesperian/Amazonian fluvial activity continued near Gale and Sharp craters. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923625144&doi=10.1002%2f2014GL062553&partnerID=40&md5=c33f6bf4888d7734a3fd7d73e5a843fd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8647
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
Ehlmann B.L.,Buz J.. Mineralogy and fluvial history of the watersheds of Gale, Knobel, and Sharp craters: A regional context for the Mars Science Laboratory Curiosity's exploration[J]. Geophysical Research Letters,2015-01-01,42(2).