[meteorite-list] Acapulcoites and NWA 725

From: bernd.pauli_at_paulinet.de <bernd.pauli_at_meteoritecentral.com>
Date: Thu Feb 16 16:01:45 2006
Message-ID: <DIIE.0000001200004437_at_paulinet.de>

Hmm-ing again :-)

"The winonaites are texturally similar to acapulcoites, but the winonaites
contain coarser grains and abundant crosscutting metal-sulfide veins."

Could this by a typo because:

Marvin's pic of the Acapulco thin section shows grains that are coarser
than the ones of NWA 1054 ...

and because:

The Antarctic acapulcoite TIL 99002 is mineralogically similar to GRA 98028
but has a larger grain size (300-400 ?m) than GRA 98028 (50-100 ?m).
(Met.Bull. 86, MAPS 37-7, July 2002).

.. and now back to Hutchison who states in Table 8.2 on page 252:

Grain-size of acapulcoites => 150-230 ?m
Grain-size of winonaites => 55-230 ?m


Regards,

Bernd
Received on Thu 16 Feb 2006 04:01:43 PM PST