Darryl Pitt about Portales Valley: Darryl Pitt, who on behalf of the Macovich Collection has acquired nearly 10 kg of Portales Valley, reports that Netschaevo, a chemically anomalous medium octahedrite with H6 silicate inclusions appears to be similar to Portales Valley. Said Pitt, "It would seem that Portales Valley may end up being classified as either a silicated or anomalous iron, and not a mesosiderite or H6 as has previously been reported."
And Jeff Grossman commented: "Obviously there is disagreement among scientists on what to call PV. I personally see no reason to call it type 7, a primitive achondrite, an achondrite or to coin a new term. If I take the conclusions of the Ruzicka study as a given, that you had H6 material near its peak metamorphic temperature, with additional shock heating and mobilization of metal- rich melt, then I see no reason not call it an H chondrite impact melt breccia in which the clasts are dominantly type 6." Cheers, Bernd ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
