Analogues for Wild2: Carbonaceous Chondrites Shot into Aerogel

Authors: Leon Hicks (University of Leicester)
Co-authored by industrial partner: No

Type: Poster

State: Published (Approved)
Published: July 2016
Diamond Proposal Number(s): 13690

Open Access Open Access

Abstract: Using the data we have gathered at I18 on micron-size grains returned by Stardust from Comet Wild2, we hypothesise that this comet has affinities to CO and CR carbonaceous chondrites. For instance, the abundance of magnetite (Fe3O4) grains that we identified in previous I18 experiments [1] demonstrates the action of liquid water on the parent body. By analysing CR chondrite powder shot into aerogel at 6 kms-1, and also newly harvested Wild2 aerogel tracks we made accurate comparisons between chondrites and the comet. This demonstrates that the mineral assemblages preserved in the Stardust tracks were formed from carbonaceous chondrite like material. We also conducted a pilot XRD, XANES study on newly discovered martian meteorites also analyse recently discovered martian meteorites in order to characterise the mineralogical effects of water-rock reaction. We will complete the latter study in a future planned experiment.

Journal Keywords: Stardust, magnetite, XANES, XRD

Subject Areas: Physics, Earth Science

Instruments: I18-Microfocus Spectroscopy

Added On: 10/12/2016 18:06

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