NDLI: Acid vapor weathering of apatite and implications for mars

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Acid vapor weathering of apatite and implications for mars

Content Provider	NASA Technical Reports Server (NTRS)
Author	Morris, R. V. Ming, D. W. Hausrath, E. M. Golden, D. C.
Copyright Year	2008
Description	Phosphorus is an essential nutrient for terrestrial life, and therefore may be important in characterizing habitability on Mars. In addition, phosphate mobility on Mars has been postulated as an indicator of early aqueous activity [1]. Rock surfaces analyzed by the Spirit Mars Exploration Rover indicate elemental concentrations consistent with the loss of a phosphate-containing mineral [2], and the highly altered Paso Robles deposit contains ~5% P2O5, modeled as 8-10 % phosphate [3]. Depending on the pH of the solution, phosphate can exist as one of four charge states, which can affect its solubility, reactivity and mobility. Phosphate may therefore prove a useful and interesting tracer of alteration conditions on Mars. Acid vapor weathering has been previously studied as a potentially important process on Mars [4-6], and Paso Robles may have been formed by reaction of volcanic vapors with phosphate-bearing rock [3, 7]. Here we present preliminary results of acid vapor reactions in a Parr vessel [6] using fluorapatite, olivine and glass as single phases and in a mixture.
File Size	259096
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20080010886
Archival Resource Key	ark:/13960/t5cc60230
Language	English
Publisher Date	2008-01-01
Access Restriction	Open
Subject Keyword	Geophysics Mars Environment Olivine Habitability Reactivity Vapors Solubility Weathering Phosphorus Rocks Minerals Calcium Phosphates Mars Exploration Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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