Plutonium-Xenon systematics of Angrites

Busemann, H. and Eugster, O. (2003). Plutonium-Xenon systematics of Angrites. In: 66th Annual Meeting of the Meteoritical Society, 28 Jul - 1 Aug 2003, Munster, Germany.

URL: http://www.lpi.usra.edu/meetings/metsoc2003/pdf/51...

Abstract

Introduction: Angrites are igneous meteorites that crystallized very early in the solar system, ~10 Ma after CAIs, as also implied by the presence of now extinct short-lived radionuclides such as 53Mn, 146Sm and 244Pu [1]. Fission Xe was used to calculate 244Pu-136Xeretention ages of eucrites, relative to that of Angra dos Reis (AdoR) [2]. AdoR has an absolute Pb-Pb age of 4557.8 Ma [see 1 for ref.]. Most eucrites, being as old as angrites, experienced various parent body processes leading to ages ranging from ~20 Ma before, to ~100 Ma after AdoR [2]. Angrites, however, remained largely unaltered after differentiation. Here, we examine whether Xe isotopic characteristics
allow determining an age sequence for angrites.

Viewing alternatives

Item Actions

Export

You can export this page using these formats