Noble gases in Tagish Lake

Grady, Monica; Verchovsky, Sasha; Franchi, Ian; Wright, Ian and Pillinger, Colin (2001). Noble gases in Tagish Lake. In: 64th Annual Meteoritical Society Meeting, 10-14 September 2001, Vatican City, Italy.

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Abstract

From the introduction: Tagish Lake has been classified as a CI2 chondrite [1] with an interstellar grain abundance enhanced over that of CI1 and CM2 chondrites [2]. Noble gases have been used as markers for the presence of exotic, presolar grains in chondritic meteorites: Xe-HL (nanodiamonds) and Xe-s/Ne-E (SiC). We have measured 4He, Ne, Ar and Xe in whole-rock Tagish Lake, and an orthophosphoric acid-resistant residue, in an effort to define more precisely the relative abundances of the different presolar components present, and to verify whether or not the meteorite has an enhanced complement of presolar diamonds. For comparison, whole-rock samples of Orgueil and Murchison have also been analysed using the same experimental procedure.

Item Type:	Conference Item
Extra Information:	Abstract #5341
Academic Unit/Department:	Science > Physical Sciences
Interdisciplinary Research Centre:	Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID:	8651
Depositing User:	Kyra Proctor
Date Deposited:	17 Jul 2007
Last Modified:	05 Dec 2010 03:30
URI:	http://oro.open.ac.uk/id/eprint/8651

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