[meteorite-list] A statement in regards to NWA 3133

From: David Weir <dgweir_at_meteoritecentral.com>
Date: Thu Jun 2 19:04:48 2005
Message-ID: <429F9056.2090508_at_earthlink.net>

So, this seems to me to possibly represent a case of a heterogeneous
layer of a common asteroid, with one area having experienced more
intense heating with accompanying partial melting (NWA 3133 = PAC),
while an adjacent area experienced only enough heat to produce the
properties of a metamorphic grade 7 (NWA 1839). I believe the Portales
Valley meteorite may exhibit a similar disproportionate heating event,
and a similar dichotomy in classification - H7 vs PAC/or impact melt,
depending on which section one studies.

David

Jeff Grossman wrote:

> That said, I have to disagree with Adam... the two descriptions are
> extremely similar to each other.
Received on Thu 02 Jun 2005 07:03:50 PM PDT