Re-2: [meteorite-list] Tiny Bubbles in NWA 1817
here is a link to a different site that should work. http://my.execpc.com/~eagle1/ Hello Don and List, Thank you, this one works. Yes, that tiny bubble is an interesting feature. The description of NWA 1817 in the Meteoritical Bulletin also mentions the presence of a silica polymorph. Maybe this bubble is such a SiO2 polymorph. That dark clast/inclusion itself is an interesting feature because it looks highly crystalline. Maybe it is highly shocked and thus shock- darkened. This mesosiderite also contains anorthitic plagioclase and the transformation product of plagioclase that underwent intense shock pressure is maskelynite which is colorless and clear. Best wishes, Bernd To: [EMAIL PROTECTED] [EMAIL PROTECTED] __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Tiny Bubbles in NWA 1817
Hello Don and List, examining a piece of Mesosiderite NWA 1817...I found a small cavity in an inclusion with tiny gas bubbles. The inclusion has a fairly dark matrix, but the little cavity is filled with a very clear glass like material and several bubbles are clearly visible. Although your file is momentarily inaccessible, I wouldn't be too surprised to find such bubbles and glass-like material in NWA 1817, as it is described as having a plutonic, igneous texture (Met.Bull. 88, 2004). This mesosiderite will have crystallized from a molten magma (igneous) deep down in its asteroidal parent body (plutonic) and dissolved gases will have caused these bubbles when the material was transported to the surface by volcanic activity. Just a guess ... any comments? Best wishes, Bernd To: [EMAIL PROTECTED] [EMAIL PROTECTED] __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Tiny Bubbles in NWA 1817
Hello Bernd and List, Thank you very much for your very clear and logical explanation. Not sure why the problem with accessing the photos on yahoo, but here is a link to a different site that should work. http://my.execpc.com/~eagle1/ Thanks again for sharing your amazing knowledge of meteorites. Best regards, Don Shervey - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Saturday, March 20, 2004 12:13 PM Subject: [meteorite-list] Tiny Bubbles in NWA 1817 Hello Don and List, examining a piece of Mesosiderite NWA 1817...I found a small cavity in an inclusion with tiny gas bubbles. The inclusion has a fairly dark matrix, but the little cavity is filled with a very clear glass like material and several bubbles are clearly visible. Although your file is momentarily inaccessible, I wouldn't be too surprised to find such bubbles and glass-like material in NWA 1817, as it is described as having a plutonic, igneous texture (Met.Bull. 88, 2004). This mesosiderite will have crystallized from a molten magma (igneous) deep down in its asteroidal parent body (plutonic) and dissolved gases will have caused these bubbles when the material was transported to the surface by volcanic activity. Just a guess ... any comments? Best wishes, Bernd To: [EMAIL PROTECTED] [EMAIL PROTECTED] __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
