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Spatial correlations between silicate and metal weathering in Antarctic chondrites

Steer, E. D.; Schwenzer, S. P.; Wright, I. P. and Grady, M. M. (2014). Spatial correlations between silicate and metal weathering in Antarctic chondrites. In: 45th Lunar and Planetary Science Conference, 17-21 Mar 2014, The Woodlands, TX, USA.

URL: http://www.hou.usra.edu//meetings/lpsc2014/
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Abstract

Terrestrial alteration of Antarctic meteorites is a long documented phenomenon [e.g. 1,2] and has been frequently used as an analogue for weathering on Mars [3,4]. Focused reports of separate alteration effects have been thorough [5], but this work is part of a larger study aiming to consolidate mineralogical alteration, trace and major element inventories, noble gas inventories and halogen contents in order to correlate the visible with the non-visible effects. Ultimately, we hope to use what we have learnt from Antarctic weathering to interpret alteration of Martian surface rocks.

Here we report data to link the etching and compositional alteration of olivines with the weathering of kamacite and taenite and the consequent staining of the meteorite. Over 250 olivines in a rim and an interior sample of a meteorite have been measured and compared with elemental maps and back scattered electron images to build up a picture of the exact locations and possible causes of compositional variation.

Item Type: Conference or Workshop Item
Copyright Holders: 2014 The Authors
Keywords: alteration; acidic weathering; element mobility; chondrites; Mars analogs
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Faculty of Science, Technology, Engineering and Mathematics (STEM) > Environment, Earth and Ecosystem Sciences
Research Group: Space
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Item ID: 39395
Depositing User: Susanne Schwenzer
Date Deposited: 05 Feb 2014 11:59
Last Modified: 07 Dec 2018 10:21
URI: http://oro.open.ac.uk/id/eprint/39395
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