[meteorite-list] Native iron in DHO 007
From: mark ford <markf_at_meteoritecentral.com>
Date: Tue Aug 3 12:22:18 2004
Bernd, and list,
Thanks Bernd, we can always rely on you for an explanation.
I still don't quite get how the metal grains can exist, shouldn't all
the metallic iron be bound up?
I can understand the Fe in the pigeonite (but this would be really
tiny), but there is reasonable amount of ~0.5mm fresh Fe/Ni metal
grains/flecks showing in the matrix, though it doesn't appear to be in
Could the over abundance of metal be connected the anomalous oxygen
environment, it is thought to have formed in?
I suppose it could be brecciation with some well differentiated
Chondritic material mixed in...?
From: bernd.pauli_at_paulinet.de [mailto:email@example.com]
Sent: 03 August 2004 16:52
Subject: [meteorite-list] Native iron in DHO 007
> I was looking at a fellow IMCA member's (Mark Ford) slice
> of DHO 007 last night.... I cannot understand how native Fe
> came to be in the structure.
Hello, hullo, hi Listees and Listoids,
Eucrites predominately contain pigeonite and plagioclase. The pigeonite
contains tiny grains of iron metal which makes these meteorites slightly
Reference: NORTON O.R. (1998) Rocks From Space, 2nd edition, pp.
Apart from this, Dhofar only contains accessory amounts of metal (plus
chromite). Metal is presented as two varieties: kamacite (Ni 4.99 wt%)
(Ni 50.5 wt%).
Reference: AFANASIEV S.V. et al. (2000) Dhofar 007 and NWA 011:
Two new eucrites of different types (MAPS 35-5, 2000, Suppl., A019).
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Received on Tue 03 Aug 2004 12:19:26 PM PDT