The 100^th Martian meteorite Ksar Ghilane 002 (KG 002): Noble gases and radionuclides point to a strong relationship with Los Angeles

Ksar Ghilane 002 (KG 002) is the 100^th Martian meteorite to be catalogued by the Meteoritical Bulletin, and the first to be recovered from Tunisia (January, 2010). The single stone, weighing 538 g, is a coarse-grained basaltic shergottite that shows remarkable petrological and compositional similarities with evolved shergottite Los Angeles [1,2].
By performing noble gas and radionuclide analysis on KG 002, we aim to contribute further in determining the extent of its similarity with Los Angeles. In particular, we investigate the potential for a launch-pairing of these two meteorites by comparison of cos-mic ray exposure (CRE) ages, where preferred CRE ages for Los Angeles of 3.10 ± 0.70 and 3.35 ± 0.30 Ma have been previously suggested [3,4].
References: [1] Llorca J. et al. (subm.) MAPS. [2] Roszjar J. et al. (2011) LPSC XLIII, this conf. [3] Terribilini, D. et al. (2000) MAPS, 35:A155-A156. [4] Eugster, O. et al. (2002) MAPS, 37:1345-1360.