[meteorite-list] Mt. Egerton
From: Mikestockj_at_aol.com <Mikestockj_at_meteoritecentral.com>
Date: Thu Apr 22 09:43:33 2004 Message-ID: <41.e719701.288b127e_at_aol.com> --part1_41.e719701.288b127e_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hi Dave The short answer to your question is mesosiderite anomalous is the "correct" (actually accepted is a better word) classification for Mount Egerton. The long answer is both are probably acceptable. The larger pieces contain both metal and stone. Most of the stone portion is classified an enstatite achondrite(aubrite). So the smaller stone pieces most people have in their collections is an aubrite. This is no different from many other meteorites. For instance if you had a piece of Zag with only the H3 portion you would still probably label it as H3-6. But as you can see technically if it were labeled H3 that would also be correct. My opinion is the specimen should be labeled according the Meteoritical Society(MS) recommendations or the 5th ed. Catalogue of Meteorites with a footnote stating that your specimen contains only a portion of the whole classification. That should answer the questions for most meteorites. Unfortunately Mount Egerton falls in to another category. Some researchers have proposed that it should be classified a metal-rich aubrite. That is of course how Portales Valley was classified, H6 metal-rich as opposed to possibly a stony iron. Since the MS rarely reclassifies a meteorite it will probably be changed by more researchers using the new or different classification. As someone mentioned in a post a few weeks ago there will probably major shake up in the stony iron classification or at the very least in the mesosiderites. So maybe someday we will see a new accepted classification for Mount Egerton and others. Hope that helps. Mike Mike Jensen Bill Jensen Jensen Meteorites 8503 W. Mtn. View LN Littleton CO 80125 303-337-4361 Web Site: www.meteorite.com (click on Jensen Meteorites) or go to <A HREF="http://www.jensenmeteorites.com/">Jensen Meteorites</A> --part1_41.e719701.288b127e_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: 7bit <HTML><FONT FACE=arial,helvetica><FONT SIZE=2>Hi Dave <BR> <BR>The short answer to your question is mesosiderite anomalous is the "correct" <BR>(actually accepted is a better word) classification for Mount Egerton. <BR>The long answer is both are probably acceptable. The larger pieces contain <BR>both metal and stone. Most of the stone portion is classified an enstatite <BR>achondrite(aubrite). So the smaller stone pieces most people have in their <BR>collections is an aubrite. This is no different from many other meteorites. <BR>For instance if you had a piece of Zag with only the H3 portion you would <BR>still probably label it as H3-6. But as you can see technically if it were <BR>labeled H3 that would also be correct. <BR>My opinion is the specimen should be labeled according the Meteoritical <BR>Society(MS) recommendations or the 5th ed. Catalogue of Meteorites with a <BR>footnote stating that your specimen contains only a portion of the whole <BR>classification. <BR>That should answer the questions for most meteorites. Unfortunately Mount <BR>Egerton falls in to another category. Some researchers have proposed that it <BR>should be classified a metal-rich aubrite. That is of course how Portales <BR>Valley was classified, H6 metal-rich as opposed to possibly a stony iron. <BR>Since the MS rarely reclassifies a meteorite it will probably be changed by <BR>more researchers using the new or different classification. As someone <BR>mentioned in a post a few weeks ago there will probably major shake up in the <BR>stony iron classification or at the very least in the mesosiderites. So maybe <BR>someday we will see a new accepted classification for Mount Egerton and <BR>others. <BR>Hope that helps. <BR> <BR>Mike <BR> <BR>Mike Jensen <BR>Bill Jensen <BR>Jensen Meteorites <BR>8503 W. Mtn. View LN <BR>Littleton CO 80125 <BR>303-337-4361 <BR>Web Site: www.meteorite.com <BR>(click on Jensen Meteorites) or go to <BR> <A HREF="http://www.jensenmeteorites.com/">Jensen Meteorites</A> </FONT></HTML> --part1_41.e719701.288b127e_boundary-- Received on Sat 21 Jul 2001 01:14:38 PM PDT |
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