Re: [meteorite-list] Silver stuff on the West?
G'day John all, That's certainly an interesting theory but I don't know either if that is possible or not. I hope someone studying West will have the opportunity to study this feature. I was having a think about this the other day too. A couple of ideas I had were: 1) Possibly a reaction between something in the fusion crust (iron component... magnetite?) and localised soil and/or vegetation. (i.e. staining by acidic compounds?) This is just a thought which I don't know virtually nothing about. 2) The second is obviously more like something that happened during passage through the atmosphere. For example the silver sheen on magnetite crystals is due to high luster on the crystal faces (reflectivness). In this case could it be due to an abrasive ablation effect? I bet there are MANY theories on this feature and I'd certainly be interested to hear some. Cheers, Jeff - Original Message - From: John Gwilliam j...@cox.net To: mccart...@blackbearddata.com; meteorite-list@meteoritecentral.com Sent: Monday, March 23, 2009 11:13 AM Subject: Re: [meteorite-list] Silver stuff on the West? Here's an idea about the silver blotches on some of the West meteorites. Could it be pure nickel? I don't know if it's possible for metallic particles in meteorites to consist of mostly nickel. Are all iron/nickel blebs a homogeneous mix of the two metals? The color of this silver blotching looks a lot like matte nickel plating that is often found on firearms and some plumbing fixtures. Just a thought. Best, John At 10:19 PM 3/19/2009, McCartney Taylor wrote: I have found another specimen with a pronounced silver 'line' http://outofabluesky.com/images/stories/stoneymeteorites/west15-1.jpg I really don't know what to make of it. In this new piece, its like its a silver blob that melted and oozed out of the tiny gash in the stone. I'm disinclined now to a post fall chemical reaction. Do take note of the oxidation effect the rain had on the stone. There is another specimen with silver 'blotches' on this page, the 29.5g piece. http://outofabluesky.com/index.php?option=com_jportfoliocat=4project=46Itemid=58 Any good theories out there? -mt __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list John Gwilliam Too many people were born on third base and go through life thinking they hit a triple. __ 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] Silver stuff on the West?
Hello All, The same silvery features are visible on many of the 'Berduc' stones (and on many other falls); I believe that they are the result of the melting of troilite present in the meteorite. This would create iron sulfide, albeit iron sulfide that looks rather different from the unaltered material we're used to seeing on the cut surfaces of stones and irons. Regards, Jason On Mon, Mar 23, 2009 at 2:38 AM, Jeff Kuyken i...@meteorites.com.au wrote: G'day John all, That's certainly an interesting theory but I don't know either if that is possible or not. I hope someone studying West will have the opportunity to study this feature. I was having a think about this the other day too. A couple of ideas I had were: 1) Possibly a reaction between something in the fusion crust (iron component... magnetite?) and localised soil and/or vegetation. (i.e. staining by acidic compounds?) This is just a thought which I don't know virtually nothing about. 2) The second is obviously more like something that happened during passage through the atmosphere. For example the silver sheen on magnetite crystals is due to high luster on the crystal faces (reflectivness). In this case could it be due to an abrasive ablation effect? I bet there are MANY theories on this feature and I'd certainly be interested to hear some. Cheers, Jeff - Original Message - From: John Gwilliam j...@cox.net To: mccart...@blackbearddata.com; meteorite-list@meteoritecentral.com Sent: Monday, March 23, 2009 11:13 AM Subject: Re: [meteorite-list] Silver stuff on the West? Here's an idea about the silver blotches on some of the West meteorites. Could it be pure nickel? I don't know if it's possible for metallic particles in meteorites to consist of mostly nickel. Are all iron/nickel blebs a homogeneous mix of the two metals? The color of this silver blotching looks a lot like matte nickel plating that is often found on firearms and some plumbing fixtures. Just a thought. Best, John At 10:19 PM 3/19/2009, McCartney Taylor wrote: I have found another specimen with a pronounced silver 'line' http://outofabluesky.com/images/stories/stoneymeteorites/west15-1.jpg I really don't know what to make of it. In this new piece, its like its a silver blob that melted and oozed out of the tiny gash in the stone. I'm disinclined now to a post fall chemical reaction. Do take note of the oxidation effect the rain had on the stone. There is another specimen with silver 'blotches' on this page, the 29.5g piece. http://outofabluesky.com/index.php?option=com_jportfoliocat=4project=46Itemid=58 Any good theories out there? -mt __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list John Gwilliam Too many people were born on third base and go through life thinking they hit a triple. __ 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 __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Silver stuff on the West?
Here's an idea about the silver blotches on some of the West meteorites. Could it be pure nickel? I don't know if it's possible for metallic particles in meteorites to consist of mostly nickel. Are all iron/nickel blebs a homogeneous mix of the two metals? The color of this silver blotching looks a lot like matte nickel plating that is often found on firearms and some plumbing fixtures. Just a thought. Best, John At 10:19 PM 3/19/2009, McCartney Taylor wrote: I have found another specimen with a pronounced silver 'line' http://outofabluesky.com/images/stories/stoneymeteorites/west15-1.jpg I really don't know what to make of it. In this new piece, its like its a silver blob that melted and oozed out of the tiny gash in the stone. I'm disinclined now to a post fall chemical reaction. Do take note of the oxidation effect the rain had on the stone. There is another specimen with silver 'blotches' on this page, the 29.5g piece. http://outofabluesky.com/index.php?option=com_jportfoliocat=4project=46Itemid=58 Any good theories out there? -mt __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list John Gwilliam Too many people were born on third base and go through life thinking they hit a triple. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Silver stuff on the West?
I have found another specimen with a pronounced silver 'line' http://outofabluesky.com/images/stories/stoneymeteorites/west15-1.jpg I really don't know what to make of it. In this new piece, its like its a silver blob that melted and oozed out of the tiny gash in the stone. I'm disinclined now to a post fall chemical reaction. Do take note of the oxidation effect the rain had on the stone. There is another specimen with silver 'blotches' on this page, the 29.5g piece. http://outofabluesky.com/index.php?option=com_jportfoliocat=4project=46Itemid=58 Any good theories out there? -mt __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Silver stuff on the West?
Hi McCartney, It looks like the West fall had a 'silver lining' after all!! Best regards, Greg Greg Hupe The Hupe Collection NaturesVault (eBay) gmh...@htn.net www.LunarRock.com IMCA 3163 Click here for my current eBay auctions: http://search.ebay.com/_W0QQsassZnaturesvault - Original Message - From: McCartney Taylor mccart...@blackbearddata.com To: meteorite-list@meteoritecentral.com Sent: Friday, March 20, 2009 1:19 AM Subject: [meteorite-list] Silver stuff on the West? I have found another specimen with a pronounced silver 'line' http://outofabluesky.com/images/stories/stoneymeteorites/west15-1.jpg I really don't know what to make of it. In this new piece, its like its a silver blob that melted and oozed out of the tiny gash in the stone. I'm disinclined now to a post fall chemical reaction. Do take note of the oxidation effect the rain had on the stone. There is another specimen with silver 'blotches' on this page, the 29.5g piece. http://outofabluesky.com/index.php?option=com_jportfoliocat=4project=46Itemid=58 Any good theories out there? -mt __ 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
