Re: [meteorite-list] Gao, Gao Gao
Zelimir Gabelica [EMAIL PROTECTED] wrote: 1) Gao(b) that is a CR (S1), found by Eric Twelker in a parcel full of normal Gaos sent to him from Burkina Faso. I also found one of these stones in a shipment from Burkina Faso. According to my source it came from a small village named Pro which is near Gao. I provided a piece to ASU for classification but before they got around to doing anything with it I found out Eric Twelker had submitted elsewhere for classification and ASU never finished the classification. I provided this information to Eric T. but it didn't make it into the bulletin. Out of 198 grams I had after cutting I kept a 36 gram endcut, sold 4 grams and the rest went to various research institutions. 2) The Gao-melt (H imb) described and put for sale by Eric Olson. This stuff is definitely far different from Gao (H5) in that, when cut, this almost black meteorite shows melts and rivers just as Portales or others. Definitely a weird stuffE. Olson is anouncing on his site since a time that these are under study. Did someone got more recent news ? I don't know if there was ever an official paper on the melt although one was supposedly in the works. I was however told that it is Gao-Guenie. In addition to the one large stone, which I cut, I have an 88 gram piece that I have left uncut and have found a half dozen small (5-15 gram) pieces. In addition I know Mike Farmer had a large stone which he cut in half and sold on eBay. All of these pieces had one thing in common, rivers of melt and black shocked unmelted areas and NO normal Gao associated with them. Hard to believe that they were the same fall. However I have since found a couple other stones which do show normal and melted Gao together. See the following photos. Half and Half stone weight 10.68 grams. The other half was given to the U of AZ for their studies. http://star-bits.com/collection/gao-halfmelt.JPG Broken oriented stone 29.08 grams with 3mm wide black glassy silicate vein. http://star-bits.com/collection/gao-vein.JPG I accept that the melt is Gao-Guenie, but they are very different animals. Once cut, not only they showed the strange metled parts but also huge vugs, some of which reaching 20+ mm !! My large stone had a 1cm x 1cm hershey's kiss shaped vug which by great skill (luck) I cut perfectly parallel to the bottom. The three slices, bottom, top, and middle (hole) went to the ASU collection. I'd post photos, but I never took any and never got back to ASU with a camera to remedy that error. Note: my source confirmed that Gao imb and Gao (H5) are (still being) found on the unique strewnfield. I have not been offered any Gao in several years, but I know others who have bought recently. I don't know if it includes any of the imb. Martin Altman wrote: Hehe, I have also a Gao(c) oder (d) or (e), in a batch of dusty Gaos from Carion, there was one, which turned out after cutting not to be a Gao, but a different ordinary chondrite, rather an L than a H. Unfortunately it had only 10g, so it still lays around here unclassified. I also found a small stone that when cut looked like an L chondrite. After cutting the 2 pieces weighed 4 grams total. I figured more would show up and when a nice sized piece showed up I'd get it classified, but I have yet to find another piece. -- Eric Olson 7682 Firethorn Dr Fayetteville, NC 28311 http://www.star-bits.com __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Gao, Gao Gao
Hello Bernd, list, Bernd, thanks much for your wise thoughts and advices. Gao is indeed a very popular meteorite, probably because it is as showy as abundant in weight and (different) shapes. I can understand Steve's falling in love for these. I also second your suggestion, namely that Steve should do more to valorize his Gao collection. This brings me to a question that is probably puzzling most of us since a while. You might not ignore that besides our old good friend Gao (H5) (that actually carries the official name Gao-Guenié), there are 2 other Gaos (or Gao-Guéniés): 1) Gao(b) that is a CR (S1), found by Eric Twelker in a parcel full of normal Gaos sent to him from Burkina Faso. The 2 small stones he got weighed 344 g (Bernd, by the way, a slice of that stuff is just outstanding! I bet you also got one See Eric's site: there are 2 pieces left!) 2) The Gao-melt (H imb) described and put for sale by Eric Olson. This stuff is definitely far different from Gao (H5) in that, when cut, this almost black meteorite shows melts and rivers just as Portales or others. Definitely a weird stuff. See pictures on Eric's site. E. Olson is reporting a tkw of 570+ grams. However, I got a few years ago 3 such Gao-melt individuals from a quite different source (directly from Burkina, not from Eric's source) that are exactly the same. They already showed a weird outline when complete (uncut). Once cut, not only they showed the strange metled parts but also huge vugs, some of which reaching 20+ mm !! E. Olson is anouncing on his site since a time that these are under study. Did someone got more recent news ? Note: my source confirmed thet Gao imb and Gao (H5) are (still being) found on the unique strewnfield. To my knowledge, nothing is known about the place where Gao(b) was found... I suggest Steve starts inquiring about these other 2 Gaos and perhaps envisages to extend his collection to Gao, Gao and Gao. By the way, here are the tkw's I have in my archives: Gao-Guénié (H5): [EMAIL PROTECTED] kg Gao-Guénié (H imb): [EMAIL PROTECTED] g (Olson's site) Gao-Guénié (b) (CR)): 2@@344 g (Twelker's site) Could someone (along with the two Erics) provide an update for these figures ? Thanks and have a nice day all, Zelimir A 16:33 15/03/2007 +, [EMAIL PROTECTED] a écrit : Knock, knock ! You seem to be building quite a collection of Gao! Go get 'em! The next step in his obsession -- head for the strewn field. Hello Steve and List, First off: I must also admit that this is becoming a very impressive, an awesome collection of Gao meteorites! Sincere congratulations! The next best step after displaying them for all of us to see, would or could now be to study them, to compare them, to look at their respective fusion crusts, to describe their individual characteristics, to do a little research on their different degrees of weathering (and maybe even shock stage[s]), the thickness or thinness of their fusion crusts, and so much more and then share your observations with the List. This would give them a life. Of course, you might also consider constructing a special Gao info page: dates of fall / find, classification, history, repositories, strewn field parameters, scientific papers / articles, and, and, and, ... The next step in his obsession -- head for the strewn field. .. Well, why not!? Gao instead of London if the risks involved are not too high! He would surely come back with some personal finds or purchases. Such specimens have an even higher, personal value! Best regards, Bernd __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list Prof. Zelimir Gabelica Université de Haute Alsace ENSCMu, Lab. GSEC, 3, Rue A. Werner, F-68093 Mulhouse Cedex, France Tel: +33 (0)3 89 33 68 94 Fax: +33 (0)3 89 33 68 15 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Gao, Gao Gao
The Gao -melt (H imb) is a wonderful meteorite to look at. Here's a picture of a half stone owned by Keith Vazquez. http://www.meteoriteimpact.com/gaomelt.htm Best, John Gwilliam At 10:30 AM 3/15/2007, Zelimir Gabelica wrote: Hello Bernd, list, Bernd, thanks much for your wise thoughts and advices. Gao is indeed a very popular meteorite, probably because it is as showy as abundant in weight and (different) shapes. I can understand Steve's falling in love for these. I also second your suggestion, namely that Steve should do more to valorize his Gao collection. This brings me to a question that is probably puzzling most of us since a while. You might not ignore that besides our old good friend Gao (H5) (that actually carries the official name Gao-Guenié), there are 2 other Gaos (or Gao-Guéniés): 1) Gao(b) that is a CR (S1), found by Eric Twelker in a parcel full of normal Gaos sent to him from Burkina Faso. The 2 small stones he got weighed 344 g (Bernd, by the way, a slice of that stuff is just outstanding! I bet you also got one See Eric's site: there are 2 pieces left!) 2) The Gao-melt (H imb) described and put for sale by Eric Olson. This stuff is definitely far different from Gao (H5) in that, when cut, this almost black meteorite shows melts and rivers just as Portales or others. Definitely a weird stuff. See pictures on Eric's site. E. Olson is reporting a tkw of 570+ grams. However, I got a few years ago 3 such Gao-melt individuals from a quite different source (directly from Burkina, not from Eric's source) that are exactly the same. They already showed a weird outline when complete (uncut). Once cut, not only they showed the strange metled parts but also huge vugs, some of which reaching 20+ mm !! E. Olson is anouncing on his site since a time that these are under study. Did someone got more recent news ? Note: my source confirmed thet Gao imb and Gao (H5) are (still being) found on the unique strewnfield. To my knowledge, nothing is known about the place where Gao(b) was found... I suggest Steve starts inquiring about these other 2 Gaos and perhaps envisages to extend his collection to Gao, Gao and Gao. By the way, here are the tkw's I have in my archives: Gao-Guénié (H5): [EMAIL PROTECTED] kg Gao-Guénié (H imb): [EMAIL PROTECTED] g (Olson's site) Gao-Guénié (b) (CR)): 2@@344 g (Twelker's site) Could someone (along with the two Erics) provide an update for these figures ? Thanks and have a nice day all, Zelimir A 16:33 15/03/2007 +, [EMAIL PROTECTED] a écrit : Knock, knock ! You seem to be building quite a collection of Gao! Go get 'em! The next step in his obsession -- head for the strewn field. Hello Steve and List, First off: I must also admit that this is becoming a very impressive, an awesome collection of Gao meteorites! Sincere congratulations! The next best step after displaying them for all of us to see, would or could now be to study them, to compare them, to look at their respective fusion crusts, to describe their individual characteristics, to do a little research on their different degrees of weathering (and maybe even shock stage[s]), the thickness or thinness of their fusion crusts, and so much more and then share your observations with the List. This would give them a life. Of course, you might also consider constructing a special Gao info page: dates of fall / find, classification, history, repositories, strewn field parameters, scientific papers / articles, and, and, and, ... The next step in his obsession -- head for the strewn field. .. Well, why not!? Gao instead of London if the risks involved are not too high! He would surely come back with some personal finds or purchases. Such specimens have an even higher, personal value! Best regards, Bernd __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list Prof. Zelimir Gabelica Université de Haute Alsace ENSCMu, Lab. GSEC, 3, Rue A. Werner, F-68093 Mulhouse Cedex, France Tel: +33 (0)3 89 33 68 94 Fax: +33 (0)3 89 33 68 15 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
