[meteorite-list] Dalgaranga Mesosiderite
From: FERNLEA4_at_aol.com <FERNLEA4_at_meteoritecentral.com>
Date: Thu Apr 22 10:00:07 2004 Message-ID: <17.2b5f88c7.2a684a49_at_aol.com> --part1_17.2b5f88c7.2a684a49_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hi folks, during my meteorite travels in Chicago last week, I picked up a great looking Australian mesosiderite individual named Dalgaranga, and was reliably informed by the curator that "this is the only metallic specimen of Dalgaranga in existence", with all the remaining 10kg being shale and completely oxidised mesosiderite. If that's the case, I'm well pleased to be the present owner, but does anyone know if that's so, or of any other metallic Dalgaranga specimens out there? I've linked through to some pictures below that I thought you might like to see. It's an oriented specimen with fine flow lines over the "dome"...the rollover lip is just about there, but has suffered from weathering somewhat. The backside obviously once contained silicate inclusions, but these have either weathered out to leave pockets, or simply didn't survive being torn off the larger mass in flight. David Weir suggested to me that this mostly iron individual was once a metallic nodule, ripped away from it's surrounding stony matrix in flight, and it's certainly looking that way. I ground a small corner this afternoon and etched the polished face to reveal a very fine Widmanstatten pattern, similar to the figures which appear on the metal blebs in my Estherville slice, plus a couple of tiny silicate inclusions. Here's the pictures.....enjoy! :-) http://fernlea.tripod.com/dalgaranga1.jpg http://fernlea.tripod.com/dalgaranga2.jpg http://fernlea.tripod.com/dalgaranga3.jpg http://fernlea.tripod.com/dalgaranga4.jpg By the way, I loved Chicago and even managed to catch a Cubs game at Wrigley Field....I made it as far as the 7th Innings Stretch, but didn't know the lyrics to "take me out to the ball game", much to everyone's relief! Cheers, Rob Elliott. www.meteorites.uk.com Fernlea Meteorites, The Wynd, Off Dickson Lane, Milton of Balgonie, Fife. KY7 6PY United Kingdom Tel: +44-(0)1592-751563 Fax: +44-(0)1592-751991 Email: fernlea4_at_aol.com --part1_17.2b5f88c7.2a684a49_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: 7bit <HTML><FONT FACE=arial,helvetica><FONT SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Hi folks,<BR> <BR> during my meteorite travels in Chicago last week, I picked up a great looking Australian mesosiderite individual named Dalgaranga, and was reliably informed by the curator that "this is the only metallic specimen of Dalgaranga in existence", with all the remaining 10kg being shale and completely oxidised mesosiderite. If that's the case, I'm well pleased to be the present owner, but does anyone know if that's so, or of any other metallic Dalgaranga specimens out there?<BR> I've linked through to some pictures below that I thought you might like to see. It's an oriented specimen with fine flow lines over the "dome"...the rollover lip is just about there, but has suffered from weathering somewhat. The backside obviously once contained silicate inclusions, but these have either weathered out to leave pockets, or simply didn't survive being torn off the larger mass in flight. David Weir suggested to me that this mostly iron individual was once a metallic nodule, ripped away from it's surrounding stony matrix in flight, and it's certainly looking that way.<BR> I ground a small corner this afternoon and etched the polished face to reveal a very fine Widmanstatten pattern, similar to the figures which appear on the metal blebs in my Estherville slice, plus a couple of tiny silicate inclusions.<BR> Here's the pictures.....enjoy! :-)<BR> <BR> http://fernlea.tripod.com/dalgaranga1.jpg<BR> <BR> http://fernlea.tripod.com/dalgaranga2.jpg<BR> <BR> http://fernlea.tripod.com/dalgaranga3.jpg<BR> <BR> http://fernlea.tripod.com/dalgaranga4.jpg<BR> <BR> By the way, I loved Chicago and even managed to catch a Cubs game at Wrigley Field....I made it as far as the 7th Innings Stretch, but didn't know the lyrics to "take me out to the ball game", much to everyone's relief!<BR> <BR> Cheers,<BR> Rob Elliott.<BR> www.meteorites.uk.com<BR> Fernlea Meteorites,<BR> The Wynd,<BR> Off Dickson Lane,<BR> Milton of Balgonie,<BR> Fife. KY7 6PY<BR> United Kingdom<BR> Tel: +44-(0)1592-751563<BR> Fax: +44-(0)1592-751991<BR> Email: fernlea4_at_aol.com</FONT></HTML> --part1_17.2b5f88c7.2a684a49_boundary-- Received on Thu 18 Jul 2002 12:43:53 PM PDT |
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