Hi Göran and list. My problem; I have a meteorite in for classification, the lab doing the work said it looks, only a guess, but, a Strange carbonaceous either an R or CO. However, there appear to be C-pockets in the matrix (unusual)." He has not received the thin section back, so it is only a guess!!! The meteorite weighed 205 grams. I bought it as an unclassified stone and was just looking for something to practice cutting and maybe sell the slices on ebay. Not knowing it was possibly something different, I cut away and made a bunch of really nice thin slices and an end cut. I still have the main mass of 78 grams. I sent 21 grams off for classification, I sent 4g part slice off to Superman, at least that is what I think of him. : ) After the cut loss, the meteorite is disappearing. http://www.petrography.com wants you to send them a 10mm thick piece to make a thin section. All my slices are 2mm to 4mm thick, so to get a 10mm thick piece, I would have to cut it from the main mass and that would be a third of it, for one thin section, the main mass is only 78 grams, that would be 25 grams. Lets say it is a carbonaceous, 25 grams for one thin section, no way! I wanted to know if I cut one of my 2mm slice into four pieces, if I could make four thin sections out of that. I read a few websites that said you had to start with a 10mm thick piece, so I figured that must be the way it had to be done. : )
Thanks, Tom peregrineflier <>< ----- Original Message ----- From: "Göran Axelsson" <[EMAIL PROTECTED]> To: "met list" <meteorite-list@meteoritecentral.com> Sent: Wednesday, June 08, 2005 6:20 PM Subject: Re: [meteorite-list] thin section waste? > Hi Tom! > > Do you really think the rest of the material is being wasted? I would > guess that the piece left is returned to the owner if he wants it back > and then it doesn't really matter if it's 4 or 10 mm thick. > > The website you linked to is a general description on how to make > a thin section (very good site, I've bookmarked it for the future) > apparently aimed for students or temporary visitors. It's not a > description on how to make thin section of meteorites as the way > to measure thickness is to look at the color of quartz. > > I think that they could work with almost any material size and > thickness if it's only rare enough and you pay them for the work. > > :-) > > /Göran > > Tom Knudson wrote: > > >Hi List, I know nothing about thin sections or how they are made. So, I went > >to Google like a good boy and read about it. All the sites I visited said > >the same thing, but gave no explanation. They said you end up with a "chip" > >it is the piece that is clued to the slide. They say to, take a "chip" 27 > >x 46 mm rectangular and 10mm thick epoxy it to the glass then cut off the > >chip as close to the glass as possible leaving just a thin slice attached to > >the glass. > > Okay, I said in the beginning, I know nothing about thin sections, but > >that seems like a waste of time and material to me!!! You just wasted 3/4's > >of the material! Why not take a piece 27 x 46mm and 4mm thick and epoxy it > >to the glass and save your self the second cut and 6mm of your material? > >You can call me what you will, but I can not see the reasoning behind the > >waste! If you are making a lunar thin section, that is an expensive > >proposition! > > > >http://almandine.geol.wwu.edu/other/thinsections/ > > > > > >Thanks, Tom > >peregrineflier <>< > > > > > >______________________________________________ > >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 > > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.323 / Virus Database: 267.6.6 - Release Date: 6/8/2005 > > ______________________________________________ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
