Differentiation history of the mesosiderite parent body: constraints from trace elements and manganese-chromium isotope systematics in Vaca Muerta silicate clasts

The Stannern trend eucrites: Contamination of main group eucritic magmas by crustal partial melts

“…Interestingly, the history of many of the clasts found in mesosiderites was intricate and involved complex remelting of the crust (e.g., Mittlefehldt, 1979;Rubin and Mittlefehldt, 1992;Wadhwa et al, 2003). Therefore, these clasts suggest a complementary view of the 4-Vesta crustal history, and strengthen the importance of crustal partial melting processes.…”

Achondrites

“…The Sm-Nd isochron ages vary from 4.52 to 4.48 Ga for three igneous clasts, and 4.42 Ga for an impact-melt clast. Wadhwa et al (2003) determined the chromium isotopic composition of four metaigneous clasts from Vaca Muerta and demonstrated that 53 Mn was present at the time of differentiation of the mesosiderite parent asteroid. Comparing mesosiderite and HED Mn-Cr isochrons, Wadhwa et al (2003) concluded that the mesosiderite parent asteroid differentiated $2My after the HED parent asteroid.…”

53Mn–53Cr systematics of the early Solar System revisited

“…doi:10. 1016/j.gca.2008.03.023 further extended to both primitive and differentiated meteorites, including carbonaceous chondrites (Birck and Allè-gre, 1988;Rotaru et al, 1992;Endress et al, 1996;Birck et al, 1999;Trinquier et al, 2005;Shukolyukov and Lugmair, 2006;Moynier et al, 2007), enstatite chondrites (Birck and Allègre, 1988;Wadhwa et al, 1997;Shukolyukov and Lugmair, 2004), ordinary chondrites (Lugmair and Shukolyukov, 1998;Nyquist et al, 2001;Polnau and Lugmair, 2001), pallasites (Birck and Allègre, 1988;Lugmair and Shukolyukov, 1998), iron meteorites (Hutcheon et al, 1992), angrites (Nyquist et al, 1994;Lugmair and Shukolyukov, 1998;Glavin et al, 2004), eucrites (Lugmair and Shukolyukov, 1998;Trinquier et al, 2005), mesosiderites (Wadhwa et al, 2003;Trinquier et al, 2005), SNC meteorites (Lugmair and Shukolyukov, 1998), and primitive achondrites (e.g., Harper et al, 1992). Hitherto, the use of the 53 Mn-53 Cr dating system has been limited by the inferred increase in 53 Mn/ 55 Mn outward from the Sun (Lugmair and Shukolyukov, 1998).…”