[meteorite-list] Am I an idiot? Rumuruti pairings
From: Martin Altmann <Altmann_at_meteoritecentral.com>
Date: Fri Aug 19 13:10:31 2005 Message-ID: <013101c5a4e2$43e56b40$567f9a54_at_9y6y40j> Quiet boys, I have another question concerning the pairings of the NWA-Rumurutis. Has anyone a little an insight or suspection, which of them are likely paired? I mean it's not common stuff like howardites, eucrites, olivine diogenites (just a joke). And if one takes a closer look, please use the new database: http://tin.er.usgs.gov/meteor/metbull.php (Mr.Grossman I revise my opinion - it's great, saves many hours of searching the new bulletins). There we have 50 entries, hence by numbers Rumuruti chondrites are as rare as Mars and Moon, and rarer then Mars and Moon bei weight. And if we look more detailled, one tends to suppose - not to say it's striking - that most NWAs should be paired, isn't it? First let's speculate about the rareness - to escape from the NWA-salad, it is always helpfull, to take a glimpse to the Antarctic meteorites, which are still the majority of all finds, - although each crumb of an unusual stone gets an own number: >From 50 Rumurutis, only 14 are from Antarctica and there are respectievely paired both from LaPaz Icefield, the four from Mount Prestrud, both from Pecora Escarpment, hence the number is shrinking to 9 Antarctic Rumis. We have 1 single observed fall: Rumuruti. Striking also, that from all Oman, where the stones must be hunted and can't be bought, we have only 1 Rumuruti (hehe AD, AD, AD wanna some?) - and the guys there are tough, reckognise even Moons without crust. And a remark to the SAH 995xx Rs - tell me, what you want, if they are true finds and if the numbers are chosen chronoligically, then I'd say - regarding how rare those type is (Antarctica, Oman, falls, as told), it's simply impossible that 3 stones of 3 different Rumurutis were lying around in desert on the very same spot, they are the same. - Remember also that mess with the EH3-Sahara, which got almost 50 different SAH97xxx numbers. So all in all we have 20 different Rumurutis from all over the globe, including the most productive search grounds, plus now 28 NWA-Rumurutis, where I include Ouzina, as it stems from that corner, but was found 1999 as there weren't NWA-nummers given yet. and from those 28 not less than 20 have a classification +/-R4 So all in all I guess moooooost of the NWA-R-chondrites are paired. Imagine another aubrite of let's say 10kg would appear in Morocco, then you could expect not to have only 2 NWA-Aubrites, but soon 20 under different numbers. Btw. did you see the R-s last 4 weeks on ebay? Wow, how underrated they ended - s i c k!!! Seems the people have no idea, how rare the stuff is - or, dealers take care, this is the other side of the coin of excessive NWA-number-multiplying - they are lost in numbers and not aware anymore, that R is one of the rarest types in existance. Buckleboo! Martin Received on Fri 19 Aug 2005 01:20:13 PM PDT |
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