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identification of crystalline minerals in volcanic alteration products and applications to the surface of marsVisible, infrared and Mossbauer spectra have been measured for fine-grained alteration products of volcanic tephra and ash. Comparison of the spectral and chemical properties for different size separates and related samples provides information about the crystalline materials in these samples and how they may have formed. Hydrothermal processes can increase the alteration rates of the primary minerals and glass and provide S, Fe and/or water for formation of sulfates and hydrated minerals. Identification of crystalline alteration minerals on Mars may indicate hydrothermal alteration and sites of interesting geologic processes.
Document ID
Document Type
Conference Paper
Bishop, J. L.
(Search for Extraterrestrial Intelligence Inst. Moffett Field, CA United States)
Madsen, M. B.
(Orsted Inst. Copenhagen, Denmark)
Murad, E.
(Bavarian Geological Survey Germany)
Wagner, P. A.
(Orsted Inst. Copenhagen, Denmark)
Date Acquired
August 19, 2013
Publication Date
March 1, 2000
Publication Information
Publication: Lunar and Planetary Science XXXI
Subject Category
Lunar and Planetary Science and Exploration
Funding Number(s)
Distribution Limits
Work of the US Gov. Public Use Permitted.

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IDRelationTitle20000080557Analytic PrimaryLunar and Planetary Science XXXI