[meteorite-list] Katol news
Hi List, Last night I heard something puzzling. A collector/scientist that I know says that he read a paper published by GSI that claims Katol is an H5 chondrite. I asked him for a link to the paper or more info on it, and I am still waiting to hear back on that. In the meantime, this has me wondering. I have seen a lot of H5 chondrites over the years. I have seen fresh H5 falls and weathered H5 NWA stones. I have never seen an H5 (or any H-chondrite) that resembles Katol. I have a hard time believing that this meteorite is an H. The pieces I have seen (many, ranging in size from crumbs to 2+ grams, whole and fragments) do not look like chondrites at all. I have heard reports of specimens that have chondrules, but I have not seen any. I also heard reports of a specimen that is entirely metal and another one with crystalline inclusions. If those reports are credible, and based on the green matrix and crystalline texture, then I doubt this is an H-chondrite. Does anyone have a link to this GSI paper or more info about it? Best regards, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Katol news
Hi Mike, I've never seen an H6 that looks like Portales Valley either. I have heard this about Katol for a while now, it's not going to be classified as anything real unusual. On Tue, Oct 1, 2013 at 9:36 AM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi List, Last night I heard something puzzling. A collector/scientist that I know says that he read a paper published by GSI that claims Katol is an H5 chondrite. I asked him for a link to the paper or more info on it, and I am still waiting to hear back on that. In the meantime, this has me wondering. I have seen a lot of H5 chondrites over the years. I have seen fresh H5 falls and weathered H5 NWA stones. I have never seen an H5 (or any H-chondrite) that resembles Katol. I have a hard time believing that this meteorite is an H. The pieces I have seen (many, ranging in size from crumbs to 2+ grams, whole and fragments) do not look like chondrites at all. I have heard reports of specimens that have chondrules, but I have not seen any. I also heard reports of a specimen that is entirely metal and another one with crystalline inclusions. If those reports are credible, and based on the green matrix and crystalline texture, then I doubt this is an H-chondrite. Does anyone have a link to this GSI paper or more info about it? Best regards, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- Rock On! Ruben Garcia http://www.MrMeteorite.com __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Katol news
Mike, all, The paper you probably refer to is G. SURESH et al.: “Katol Meteorite Shower, Maharashtra: A Preliminary Study“ from the Journal of the Geological Society of India, dated February 2013. The paper includes preliminary petrologic and chemical data. According to the findings of the authors, in Katol “Ni varies from 4.5 to 29 wt %“, which is not suprising, considering, the pure-iron individual that have been collected. Quote: “In the Katol meteorite, chondrules were recrystallised into medium to coarse rounded granular aggregates or as single euhedral crystals. The shapes of the chondrules are preserved and it can easily be delineated by encircling of medium to coarse grained Fe-Ni /troilite rims. It comprises of reconstituted chondrules (67%), matrix (20%), refractory minerals (1%) and metal volume percentage (12 %), which is typical of ordinary H type meteorite category (Scott et al., 1996). Properties such as the homogeneity of Mg composition in olivine and pyroxene, presence of clinoenstatite, interstitial untwinned plagioclase feldspar (30 to 50 μm size), absence of chondrule glass in the matrix (glass occur as inclusions within the olivine at places), presence of kamacite-taenite exsolution grains i.e. Ni 29 % in the metal and insignificant Ni concentration in sulphides i.e. 0.5 % also suggest their H-type nature.“ End of quote. In their conclusion, the authors state that “based on the present studies, the Katol meteorites are classified as ordinary olivine rich H5 type reconstituted chondrite and shows differentiated nature. “ In context with an (equilibrated) chondrite, however, I am not familiar with the terms “reconstituted” and “differentiated”, so others might jump in to explain what they refer to. The source: http://tinyurl.com/nu29ubf Cheers Svend Galactic Stone Ironworks meteoritem...@gmail.com hat am 1. Oktober 2013 um 18:36 geschrieben: Hi List, Last night I heard something puzzling. A collector/scientist that I know says that he read a paper published by GSI that claims Katol is an H5 chondrite. I asked him for a link to the paper or more info on it, and I am still waiting to hear back on that. In the meantime, this has me wondering. I have seen a lot of H5 chondrites over the years. I have seen fresh H5 falls and weathered H5 NWA stones. I have never seen an H5 (or any H-chondrite) that resembles Katol. I have a hard time believing that this meteorite is an H. The pieces I have seen (many, ranging in size from crumbs to 2+ grams, whole and fragments) do not look like chondrites at all. I have heard reports of specimens that have chondrules, but I have not seen any. I also heard reports of a specimen that is entirely metal and another one with crystalline inclusions. If those reports are credible, and based on the green matrix and crystalline texture, then I doubt this is an H-chondrite. Does anyone have a link to this GSI paper or more info about it? Best regards, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Katol news
Hello Mike, The data and thin sections I've seen suggest that it is a completely recrystallized rock with a generally chondritic composition. Such meteorites have been previously classified as primitive achondrites, type-7 chondrites, and metachondrites. I believe the distinction between these groups is semantic, though most researchers seem to have opinions regarding the use of particular names. Examples of some accepted chemical groups of these meteorites are acapulcoites/lodranites, winonaites, and possibly 'primitive enstatite achondrites.' Basic mineralogy did not rule out an L or H chondrite protolith, so it could be the first witnessed fall of a thoroughly metamorphosed ordinary/H chondrite, but it is not an H5. http://www.geosocindia.org/abstracts/2013/feb/p151-157.pdf The features noted in the above paper as chondrules could potentially represent relict chondrules, but I have yet to see anything that I would deem a chondrule remnant in the (several) thin sections I've examined...or those images. American and other scientists are currently working on the stone in order to classify it. Regards, Jason On Tue, Oct 1, 2013 at 9:36 AM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi List, Last night I heard something puzzling. A collector/scientist that I know says that he read a paper published by GSI that claims Katol is an H5 chondrite. I asked him for a link to the paper or more info on it, and I am still waiting to hear back on that. In the meantime, this has me wondering. I have seen a lot of H5 chondrites over the years. I have seen fresh H5 falls and weathered H5 NWA stones. I have never seen an H5 (or any H-chondrite) that resembles Katol. I have a hard time believing that this meteorite is an H. The pieces I have seen (many, ranging in size from crumbs to 2+ grams, whole and fragments) do not look like chondrites at all. I have heard reports of specimens that have chondrules, but I have not seen any. I also heard reports of a specimen that is entirely metal and another one with crystalline inclusions. If those reports are credible, and based on the green matrix and crystalline texture, then I doubt this is an H-chondrite. Does anyone have a link to this GSI paper or more info about it? Best regards, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Katol news
The reports of solid iron individuals are credible:) I have one (the largest at 136 grams) and I know of 5 others. Katol is an enigma and news should be out soon. Michael Farmer Sent from my iPhone On Oct 1, 2013, at 11:36 AM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi List, Last night I heard something puzzling. A collector/scientist that I know says that he read a paper published by GSI that claims Katol is an H5 chondrite. I asked him for a link to the paper or more info on it, and I am still waiting to hear back on that. In the meantime, this has me wondering. I have seen a lot of H5 chondrites over the years. I have seen fresh H5 falls and weathered H5 NWA stones. I have never seen an H5 (or any H-chondrite) that resembles Katol. I have a hard time believing that this meteorite is an H. The pieces I have seen (many, ranging in size from crumbs to 2+ grams, whole and fragments) do not look like chondrites at all. I have heard reports of specimens that have chondrules, but I have not seen any. I also heard reports of a specimen that is entirely metal and another one with crystalline inclusions. If those reports are credible, and based on the green matrix and crystalline texture, then I doubt this is an H-chondrite. Does anyone have a link to this GSI paper or more info about it? Best regards, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Katol news
By the way, Jim Strope and I have a new coin (Sikhote-Alin) just minted and for sale. I have tried and tried to get it to the list with no luck. Email us for photos and availability. It is very similar to our Chelyabinsk coins in Russian and English language. 1-1000 numbered and with meteorite embedded as usual. Michael Farmer Sent from my iPhone On Oct 1, 2013, at 1:40 PM, Jason Utas meteorite...@gmail.com wrote: Hello Mike, The data and thin sections I've seen suggest that it is a completely recrystallized rock with a generally chondritic composition. Such meteorites have been previously classified as primitive achondrites, type-7 chondrites, and metachondrites. I believe the distinction between these groups is semantic, though most researchers seem to have opinions regarding the use of particular names. Examples of some accepted chemical groups of these meteorites are acapulcoites/lodranites, winonaites, and possibly 'primitive enstatite achondrites.' Basic mineralogy did not rule out an L or H chondrite protolith, so it could be the first witnessed fall of a thoroughly metamorphosed ordinary/H chondrite, but it is not an H5. http://www.geosocindia.org/abstracts/2013/feb/p151-157.pdf The features noted in the above paper as chondrules could potentially represent relict chondrules, but I have yet to see anything that I would deem a chondrule remnant in the (several) thin sections I've examined...or those images. American and other scientists are currently working on the stone in order to classify it. Regards, Jason On Tue, Oct 1, 2013 at 9:36 AM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi List, Last night I heard something puzzling. A collector/scientist that I know says that he read a paper published by GSI that claims Katol is an H5 chondrite. I asked him for a link to the paper or more info on it, and I am still waiting to hear back on that. In the meantime, this has me wondering. I have seen a lot of H5 chondrites over the years. I have seen fresh H5 falls and weathered H5 NWA stones. I have never seen an H5 (or any H-chondrite) that resembles Katol. I have a hard time believing that this meteorite is an H. The pieces I have seen (many, ranging in size from crumbs to 2+ grams, whole and fragments) do not look like chondrites at all. I have heard reports of specimens that have chondrules, but I have not seen any. I also heard reports of a specimen that is entirely metal and another one with crystalline inclusions. If those reports are credible, and based on the green matrix and crystalline texture, then I doubt this is an H-chondrite. Does anyone have a link to this GSI paper or more info about it? Best regards, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
