[meteorite-list] eucrite question

From: Bernd Pauli HD <bernd.pauli_at_meteoritecentral.com>
Date: Thu Apr 22 09:50:23 2004
Message-ID: <3CAC2E66.781E7386_at_lehrer1.rz.uni-karlsruhe.de>

David Calongne inquired:

> what is the pure white mineral in dhofer 007 or millbillillie

David, you are probably looking at plagioclase which is anorthite
(An90-92) in the Dhofar 007 cumulate, monomict breccia.

Plagioclase is a tectosilicate: (Na,Ca)(Si,Al)3O8
Anorthite is a tectosilicate: CaAl2Si2O8

References:

RUBIN A.E. (1997) Mineralogy of meteorite groups
(Meteoritics 32-2, 1997, 231-247).

AFANASIEV S.V. et al. (2000) Dhofar 007 and
NWA 011: Two new eucrites of different types
(MAPS 35-5, 2000, Suppl., A019).


Best regards,

Bernd
Received on Thu 04 Apr 2002 05:43:50 AM PST