Re: [meteorite-list] West - Blue-Silvery Markings
Hi Tom, All... The metallic sheens produced in ceramics..eg Raku, are not produced by metal vapors but by subjecting the metal oxides in the clay or glazes to an environment without oxygen whilst still red hot (not sure of the actual temp without research) often this is by introducing gases to the kiln or removing the pot from a red hot kiln and plunging it into dead leaves or newspapers. Thus you get a reduction of the oxides as the combustables suck away the oxygen leaving the pure metals...often producing wonderful sheens in all coloursvarious copper and iron oxides are usually used. So for the same mechanism to work on the fusion crust of a meteorite it would have to be when it was still incandescent... I think...in a poor oxygen environment. So how much oxygen is there up where the West fireball was still burning??? If very little then that could be the cause...but I would have expected it to happen much more often, unless Sau 001 and West have a particular oxide in their matrix which is more prone to reduction when fragmented high up as they probably were. Graham Ensor, UK. starsandsco...@aol.com wrote: Hi Robert and list, I just looked at the post of the image on Michael's site (Thanks!!!). http://www.rocksfromspace.org/West-markings.html SaU 001 has a copper metallic sheen on some of the examples. I wonder if it is the same process at work? I am convinced it is the result of metals internal to the meteorite vaporized and depositing in the crust. Very similar to pottery glazes. Different metals=different colors. This metallic glaze has stood up to hundreds of years in the Oman desert. I think it is in the glass of the crust (so to speak). I have taken some heat on this but I have tried to wear the glaze off by carrying small samples in my pocket for extended periods. It is in the glass that forms the crust and is not part of the weathering process as has been suggested in SaU 001. In fact this metalic finish has been dismissed as just a weathering phenomenon. I am very excited to see a similar looking deposit on a fresh fall. Email me for some cool SaU 001 crust shoots but be advised, I am not as good with macro as micro! Tom Phillips In a message dated 3/10/2009 6:03:32 P.M. Mountain Daylight Time, meteoritefin...@yahoo.com writes: List, I have been meaning to ask about the blue-silvery markings on some of the West specimens we found. I see that McCartney Taylor mentions it on his new web site. I showed the 60g meteorite that it is best represented on from our finds to several in-the-know-guys, such as Mike Farmer and Robert Haag, who both have a seen a LOT more meteorites than I have. Neither of them had ever seen anything like it before. That seems to be a fairly significant statement. Robert tossed around the idea that it MIGHT be related to the copper content in this meteorite, and MIGHT be some kind of copper-related-melt-splash ? ( Not trying to start any wild, fantastic claims here at all. Like I said, this is just some musings out loud. He also said it might be some type of troilite melt-splash, or something else completely. But the point is, wouldn't most of us agree that if NO one (that I've asked) has seen something like this before, it must be fairly uncommon at the least??? If anyone has ever seen anything like this before or knows what it is, I would love to hear from you. I don't have a website, or a photo hosting site, but I would be happy to send a photo that displays the markings directly to anyone who requests it. Thanks, Robert Woolard __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list **A Good Credit Score is 700 or Above. See yours in just 2 easy steps! (http://pr.atwola.com/promoclk/100126575x1219671244x1201345076/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID %3D62%26bcd%3DfebemailfooterNO62) __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] West- Blue-Silvery Markings- Thanks and Thoughts
Hello List, and Rubin, First, a big thanks to Michael Johnson for offering to post the photo of my West meteorite with the markings. I greatly appreciate his help and time. Second, another thanks to all who have emailed their thoughts and possible explanations. I appreciate you taking the time to do so, too. Third, there seems to be a wide range of theories at this point. It obviously MUST be emphasized that my photo has been the only source for most to base their opinions on, and a not-so-great photo at that, as it is too washed out ( the stone is much darker, much more black in real life, with the markings more pronounced and shiny.) I have the permission from the respected meteorite researcher who performed the initial classification for this meteorite fall, Alan Rubin, to pass along a VERY PRELIMINARY supposition to the nature of these markings that he emailed to me. As stated above, he wants to emphasize that he too has only seen the photo, not the actual stone with the streaks in person. Here is what his initial thoughts are: When one looks at a fusion crust of an ordinary chondrite in the microscope, one notices that there are numerous tiny magnetite grains there, formed by oxidation during atmospheric passage. It looks to me as if these silvery streaks are just places where the fusion crust has flaked off revealing the magnetite-rich layer underneath. Although this explanation is much more mundane and not as exciting as some of the others, it VERY well may be the true explanation. But perhaps it is not, as Rubin was very quick to tell me in a separate email. Once more, he has not seen anything but my poor quality photo and can't be expected to make a definitive statement without first hand observation of the stone, as he himself wished to emphasize. Thanks again to all those who have emailed their thoughts. Sincerely, Robert Woolard __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] West- Blue-Silvery Markings- Thanks and Thoughts
My picture of the silver is of fairly good quality. Its the bottom photo. http://outofabluesky.com/index.php?option=com_jportfoliocat=4project=46Itemid=58 You can see that the silverish area is fairly erratic, not clustered together in a single patch. I'm more inclined to believe a chemical reaction on the ground. Has anyone found a stone with silverish on BOTH sides? I do want to note that the stone was found silver side down. -mt Original Message From: Robert Woolard meteoritefin...@yahoo.com Sent: Wednesday, March 11, 2009 2:05 PM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] West- Blue-Silvery Markings- Thanks and Thoughts Hello List, and Rubin, Third, there seems to be a wide range of theories at this point. It obviously MUST be emphasized that my photo has been the only source for most to base their opinions on, and a not-so-great photo at that, as it is too washed out ( the stone is much darker, much more black in real life, with the markings more pronounced and shiny.) I have the permission from the respected meteorite researcher who performed the initial classification for this meteorite fall, Alan Rubin, to pass along a VERY PRELIMINARY supposition to the nature of these markings that he emailed to me. As stated above, he wants to emphasize that he too has only seen the photo, not the actual stone with the streaks in person. Here is what his initial thoughts are: When one looks at a fusion crust of an ordinary chondrite in the microscope, one notices that there are numerous tiny magnetite grains there, formed by oxidation during atmospheric passage. It looks to me as if these silvery streaks are just places where the fusion crust has flaked off revealing the magnetite-rich layer underneath. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] West - Blue-Silvery Markings
List, I have been meaning to ask about the blue-silvery markings on some of the West specimens we found. I see that McCartney Taylor mentions it on his new web site. I showed the 60g meteorite that it is best represented on from our finds to several in-the-know-guys, such as Mike Farmer and Robert Haag, who both have a seen a LOT more meteorites than I have. Neither of them had ever seen anything like it before. That seems to be a fairly significant statement. Robert tossed around the idea that it MIGHT be related to the copper content in this meteorite, and MIGHT be some kind of copper-related-melt-splash ? ( Not trying to start any wild, fantastic claims here at all. Like I said, this is just some musings out loud. He also said it might be some type of troilite melt-splash, or something else completely. But the point is, wouldn't most of us agree that if NO one (that I've asked) has seen something like this before, it must be fairly uncommon at the least??? If anyone has ever seen anything like this before or knows what it is, I would love to hear from you. I don't have a website, or a photo hosting site, but I would be happy to send a photo that displays the markings directly to anyone who requests it. Thanks, Robert Woolard __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] West - Blue-Silvery Markings
Robert All, I saw it in several West specimens as well while in Texas, but I've seen it elsewhere, too. For example, here it is on a Murchison specimen: http://www.fallingrocks.com/Collections/Murchison.htm. Never have bothered to research the specific cause, but I'd imagine it's something that vanishes rapidly after the first rains hit. By the way, I'm still blue-green with envy over your son's fantastic recovery! All best, Dave www.fallingrocks.com -Original Message- From: meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of Robert Woolard Sent: Tuesday, March 10, 2009 8:03 PM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] West - Blue-Silvery Markings List, I have been meaning to ask about the blue-silvery markings on some of the West specimens we found. I see that McCartney Taylor mentions it on his new web site. I showed the 60g meteorite that it is best represented on from our finds to several in-the-know-guys, such as Mike Farmer and Robert Haag, who both have a seen a LOT more meteorites than I have. Neither of them had ever seen anything like it before. That seems to be a fairly significant statement. Robert tossed around the idea that it MIGHT be related to the copper content in this meteorite, and MIGHT be some kind of copper-related-melt-splash ? ( Not trying to start any wild, fantastic claims here at all. Like I said, this is just some musings out loud. He also said it might be some type of troilite melt-splash, or something else completely. But the point is, wouldn't most of us agree that if NO one (that I've asked) has seen something like this before, it must be fairly uncommon at the least??? If anyone has ever seen anything like this before or knows what it is, I would love to hear from you. I don't have a website, or a photo hosting site, but I would be happy to send a photo that displays the markings directly to anyone who requests it. Thanks, Robert Woolard __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] West - Blue-Silvery Markings
Did anyone make note of what the marked meteorites landed on? In raku pottery, markings like this sometimes result from plunging a red-hot pot into a bed of combustible material,like grass or newspaper. We all know that 99 times out of 100, a meteorite is NOT hot when it touches down, but for that 100th exception... Just my .2g, Tracy Latimer From: d...@fallingrocks.com To: meteoritefin...@yahoo.com; meteorite-list@meteoritecentral.com Date: Tue, 10 Mar 2009 20:14:31 -0400 Subject: Re: [meteorite-list] West - Blue-Silvery Markings Robert All, I saw it in several West specimens as well while in Texas, but I've seen it elsewhere, too. For example, here it is on a Murchison specimen: http://www.fallingrocks.com/Collections/Murchison.htm. Never have bothered to research the specific cause, but I'd imagine it's something that vanishes rapidly after the first rains hit. By the way, I'm still blue-green with envy over your son's fantastic recovery! All best, Dave www.fallingrocks.com -Original Message- From: meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of Robert Woolard Sent: Tuesday, March 10, 2009 8:03 PM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] West - Blue-Silvery Markings List, I have been meaning to ask about the blue-silvery markings on some of the West specimens we found. I see that McCartney Taylor mentions it on his new web site. I showed the 60g meteorite that it is best represented on from our finds to several in-the-know-guys, such as Mike Farmer and Robert Haag, who both have a seen a LOT more meteorites than I have. Neither of them had ever seen anything like it before. That seems to be a fairly significant statement. Robert tossed around the idea that it MIGHT be related to the copper content in this meteorite, and MIGHT be some kind of copper-related-melt-splash ? ( Not trying to start any wild, fantastic claims here at all. Like I said, this is just some musings out loud. He also said it might be some type of troilite melt-splash, or something else completely. But the point is, wouldn't most of us agree that if NO one (that I've asked) has seen something like this before, it must be fairly uncommon at the least??? If anyone has ever seen anything like this before or knows what it is, I would love to hear from you. I don't have a website, or a photo hosting site, but I would be happy to send a photo that displays the markings directly to anyone who requests it. Thanks, Robert Woolard __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list _ Express your personality in color! Preview and select themes for Hotmail®. http://www.windowslive-hotmail.com/LearnMore/personalize.aspx?ocid=TXT_MSGTX_WL_HM_express_032009#colortheme __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] West - Blue-Silvery Markings
Hi Robert and list, I just looked at the post of the image on Michael's site (Thanks!!!). http://www.rocksfromspace.org/West-markings.html SaU 001 has a copper metallic sheen on some of the examples. I wonder if it is the same process at work? I am convinced it is the result of metals internal to the meteorite vaporized and depositing in the crust. Very similar to pottery glazes. Different metals=different colors. This metallic glaze has stood up to hundreds of years in the Oman desert. I think it is in the glass of the crust (so to speak). I have taken some heat on this but I have tried to wear the glaze off by carrying small samples in my pocket for extended periods. It is in the glass that forms the crust and is not part of the weathering process as has been suggested in SaU 001. In fact this metalic finish has been dismissed as just a weathering phenomenon. I am very excited to see a similar looking deposit on a fresh fall. Email me for some cool SaU 001 crust shoots but be advised, I am not as good with macro as micro! Tom Phillips In a message dated 3/10/2009 6:03:32 P.M. Mountain Daylight Time, meteoritefin...@yahoo.com writes: List, I have been meaning to ask about the blue-silvery markings on some of the West specimens we found. I see that McCartney Taylor mentions it on his new web site. I showed the 60g meteorite that it is best represented on from our finds to several in-the-know-guys, such as Mike Farmer and Robert Haag, who both have a seen a LOT more meteorites than I have. Neither of them had ever seen anything like it before. That seems to be a fairly significant statement. Robert tossed around the idea that it MIGHT be related to the copper content in this meteorite, and MIGHT be some kind of copper-related-melt-splash ? ( Not trying to start any wild, fantastic claims here at all. Like I said, this is just some musings out loud. He also said it might be some type of troilite melt-splash, or something else completely. But the point is, wouldn't most of us agree that if NO one (that I've asked) has seen something like this before, it must be fairly uncommon at the least??? If anyone has ever seen anything like this before or knows what it is, I would love to hear from you. I don't have a website, or a photo hosting site, but I would be happy to send a photo that displays the markings directly to anyone who requests it. Thanks, Robert Woolard __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list **A Good Credit Score is 700 or Above. See yours in just 2 easy steps! (http://pr.atwola.com/promoclk/100126575x1219671244x1201345076/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID %3D62%26bcd%3DfebemailfooterNO62) __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
