RE: [meteorite-list] A contributary question for a change!
Hi, (I am back too by the way - Just couln't stay away!) Yeah, I noticed on Dave's superb Etherville slice, that there where also quite a few vesicles in the darker ?melt? pockets some of them quite big bubbles, what are the implications for this? Does this mean it's just odd impact melt or would you normally expect vesicles on a core-mantle sample?? Mark Ford -Original Message- From: Dave Harris [mailto:[EMAIL PROTECTED] Sent: 04 May 2004 21:39 To: metlist Subject: [meteorite-list] A contributary question for a change! Hello, My question is about mesosiderites and their composition. I have just been reading the bit on mesos in Harry Mcsween's magnificent Meteorites and their Parent Planets . He states, and I quite, on pg 210-211: Many of the silicate fragments in these [mesosiderite]meteorites are very similar to eucrites, diogenites and howardites, basically igneous rocks from the crust of an achondrite body. What is noticeably missing from the mesosiderites is olivine... Well, I have a 180+ thick slice of Estherville and I can assure you that there are olivine xls present - you can shine a torch thru them! So I would like to assume that a mesosiderite is not a core-mantle sample (like a Pallasite) but the smushed up surface of a well pounded asteroid. Any thought?s sincerely! Dave IMCA #0092 __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] A contributary question for a change!
In a message dated 5/4/2004 2:40:54 PM Mountain Standard Time, [EMAIL PROTECTED] writes: Well, I have a 180+ thick slice of Estherville and I can assure you thatthere are olivine xls present - you can shine a torch thru them!So I would like to assume that a mesosiderite is not a core-mantle sample(like a Pallasite) but the smushed up surface of a well pounded asteroid. I have a couple of those too. They are beautiful. Just go look: http://www.impactika.com/Esthr31g.html http://www.impactika.com/meteorities/Esthr6g.html That mesosiderite wants to grow up to be a pallasite?? :-) Anne M. Blackwww. IMPACTIKA.com[EMAIL PROTECTED]IMCA #2356 __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] A contributary question for a change!
Hi Anne, Dave and List, I believe those clasts are orthopyroxene not olivine judging by the cleavage but you would need a Microprobe to be sure. All the best, Adam - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] ; [EMAIL PROTECTED] Sent: Tuesday, May 04, 2004 8:01 PM Subject: Re: [meteorite-list] A contributary question for a change! In a message dated 5/4/2004 2:40:54 PM Mountain Standard Time, [EMAIL PROTECTED] writes: Well, I have a 180+ thick slice of Estherville and I can assure you thatthere are olivine xls present - you can shine a torch thru them!So I would like to assume that a mesosiderite is not a core-mantle sample(like a Pallasite) but the smushed up surface of a well pounded asteroid. I have a couple of those too. They are beautiful. Just go look: http://www.impactika.com/Esthr31g.html http://www.impactika.com/meteorities/Esthr6g.html That mesosiderite wants to grow up to be a pallasite?? :-) Anne M. Blackwww. IMPACTIKA.com[EMAIL PROTECTED]IMCA #2356 __Meteorite-list mailing list[EMAIL PROTECTED]http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
