[meteorite-list] primitive Ureilite ?
From: stan . <laser_maniac_at_meteoritecentral.com>
Date: Tue Sep 28 20:14:52 2004 Message-ID: <BAY18-F118BYXifWoqF0000ab9f_at_hotmail.com> Just out of curiosity, do you know the subtype of this ureilite yet, or does the diffrences between it and other ureilites make it not fit in with any subtype? >From: "Adam Hupe" <raremeteorites_at_comcast.net> >To: <meteorite-list_at_meteoritecentral.com> >Subject: Re: [meteorite-list] primitive Ureilite ? >Date: Tue, 28 Sep 2004 10:26:50 -0700 > >Hi List, > >Matt is correct in stating that all Ureilites are primitive. The reason I >used the word primitive in describing NWA 3140 is that it is less evolved >than that of other Ureilites. It even has areas containing elemental >metal, >no differentiation between crystals/matrix and is relatively diamond poor. >I enjoy Ureilites when prepared properly (by somebody else) because they >are >striking under magnification. I do not enjoy preparing them myself because >it usually takes 30 times the effort to do it right because of the >diamonds. >NWA 3140 does not destroy blades and polishing pads during preparation >making it a pleasure to work with. In the past we worked with a >diamond-rich Ureilite called NWA 3135. To make a 2.8 centimeter cut cost >us >3 blades, 2 diamond lap wheels and over 3 hours of effort making it a true >nightmare. > >All the best, > >------------------------------------ >Adam Hupe >The Hupe Collection >Team LunarRock >IMCA 2185 >raremeteorites_at_comcast.net > > > >----- Original Message ----- >From: "Matt Morgan" <mmorgan_at_mhmeteorites.com> >To: <j.divelbiss_at_att.net> >Cc: <meteorite-list_at_meteoritecentral.com> >Sent: Tuesday, September 28, 2004 9:59 AM >Subject: RE: [meteorite-list] primitive Ureilite ? > > >John: >I am sure Adam will have something to add but here is a good description >of Ureilites >http://www.daviddarling.info/encyclopedia/U/ureilite.html > >I always thought that all ureilites were "primitive". So someone please >enlighten us! >Matt Morgan > >-----Original Message----- >From: meteorite-list-bounces_at_meteoritecentral.com >[mailto:meteorite-list-bounces_at_meteoritecentral.com] On Behalf Of >j.divelbiss_at_att.net >Sent: Tuesday, September 28, 2004 10:51 AM >To: meteorite-list_at_meteoritecentral.com >Subject: [meteorite-list] primitive Ureilite ? > > >Hello all, > >I was reading one of Adam's auctions this morning and noticed the word >primitive attached to the word Ureilite and began to wonder what was the >latest status on Ureilites being considered "primitive". I know the word >is used with primitive materials like Acapulcoites and Lodranites >because their age is suggested at the chondrite level of 4.5+ billion >years. > >I believe this reference for Ureilites infers the involvement of >pre-solar or solar parts such as the diamonds versus a formation age of >4.5 billion years. Or maybe I'm wrong about that. At one time the >diamonds were thought to be shock/pressure related, but recently >Ureilites with low-shock values have been found that has scientists >thinking that the diamonds came from some other source. > >What is considered the formation age of Ureilites? And does that age in >itself make them primitive, or does the parts/pieces make them >considered primitive? > >Curious, > >John/JD > > > >______________________________________________ >Meteorite-list mailing list >Meteorite-list_at_meteoritecentral.com >http://six.pairlist.net/mailman/listinfo/meteorite-list > > >______________________________________________ >Meteorite-list mailing list >Meteorite-list_at_meteoritecentral.com >http://six.pairlist.net/mailman/listinfo/meteorite-list > > >______________________________________________ >Meteorite-list mailing list >Meteorite-list_at_meteoritecentral.com >http://six.pairlist.net/mailman/listinfo/meteorite-list _________________________________________________________________ Check out Election 2004 for up-to-date election news, plus voter tools and more! http://special.msn.com/msn/election2004.armx Received on Tue 28 Sep 2004 08:02:47 PM PDT |
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