DOI: 10.1016/j.epsl.2018.02.037
Scopus记录号: 2-s2.0-85044131700
论文题名: Reactive transport and mass balance modeling of the Stimson sedimentary formation and altered fracture zones constrain diagenetic conditions at Gale crater, Mars
作者: Hausrath E.M. ; Ming D.W. ; Peretyazhko T.S. ; Rampe E.B.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 491 起始页码: 1
结束页码: 10
语种: 英语
英文关键词: altered fracture zones
; Gale crater
; Mars
; reactive transport modeling
; Stimson formation
; weathering
Scopus关键词: Calcium
; Calcium compounds
; Fracture
; Geochemistry
; Martian surface analysis
; Sedimentology
; Silica
; Silicate minerals
; Sulfur compounds
; Thermodynamics
; Weathering
; Fracture zone
; Gale crater
; Mars
; Reactive transport modeling
; Stimson formation
; Sedimentary rocks
; crater
; diagenesis
; eolian deposit
; fracture zone
; magnetite
; Mars
; mass balance
; olivine
; parent material
; reactive transport
; weathering
英文摘要: On a planet as cold and dry as present-day Mars, evidence of multiple aqueous episodes offers an intriguing view into very different past environments. Fluvial, lacustrine, and eolian depositional environments are being investigated by the Mars Science Laboratory Curiosity in Gale crater, Mars. Geochemical and mineralogical observations of these sedimentary rocks suggest diagenetic processes affected the sediments. Here, we analyze diagenesis of the Stimson formation eolian parent material, which caused loss of olivine and formation of magnetite. Additional, later alteration in fracture zones resulted in preferential dissolution of pyroxene and precipitation of secondary amorphous silica and Ca sulfate. The ability to compare the unaltered parent material with the reacted material allows constraints to be placed on the characteristics of the altering solutions. In this work we use a combination of a mass balance approach calculating the fraction of a mobile element lost or gained, τ with fundamental geochemical kinetics and thermodynamics in the reactive transport code CrunchFlow to examine the characteristics of multiple stages of aqueous alteration at Gale crater, Mars. Our model results indicate that early diagenesis of the Stimson sedimentary formation is consistent with leaching of an eolian deposit by a near-neutral solution, and that formation of the altered fracture zones is consistent with a very acidic, high sulfate solution containing Ca, P and Si. These results indicate a range of past aqueous conditions occurring at Gale crater, Mars, with important implications for past martian climate and environments. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109915
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: University of Nevada, Las Vegas, United States; NASA Johnson Space Center, United States; Jacobs, NASA Johnson Space Center, United States
Recommended Citation:
Hausrath E.M.,Ming D.W.,Peretyazhko T.S.,et al. Reactive transport and mass balance modeling of the Stimson sedimentary formation and altered fracture zones constrain diagenetic conditions at Gale crater, Mars[J]. Earth and Planetary Science Letters,2018-01-01,491