[meteorite-list] Tagish Lake - asteroidal or cometary?

From: bernd.pauli_at_paulinet.de <bernd.pauli_at_meteoritecentral.com>
Date: Fri Jan 7 14:55:43 2005
Message-ID: <DIIE.000000220000307B_at_paulinet.de>

Hello Walter and List,

Thursday, January 06, 2005, Walter wrote

> Speaking of Tagish Lake, is it of asteroidal or cometary origin?


KMINEK G. et al. (2002) Amino acids in the Tagish
Lake meteorite (MAPS 37-5, 2002 May, pp. 697-701):

pp. 700-701: "The low amino acid abundance of Tagish Lake relative to CM
and CI carbonaceous chondrites indicate that the chemical precursors for
the synthesis of amino acids may have been absent on the Tagish Lake parent
body. Based on this reasoning, C- and G-type asteroids as well as comets can
probably be excluded as possible parent bodies for the Tagish Lake meteorite.
Spectroscopic and dynamical evidence suggests that the Tagish Lake meteorite
originated from a parent body in the outer region of the main asteroid belt,
which is dominated by P- and D-type asteroids. If the Tagish Lake meteorite
is a representative sample of a P- or D-type asteroid, then these objects
apparently do not contain as rich a mixture of organic compounds as previously
thought."


Best wishes,

Bernd
Received on Fri 07 Jan 2005 02:55:41 PM PST