[meteorite-list] How they classify Meteorites
Hi What are the steps that a lab takes to classify a meteorite? Are there any simple guidelines that we can use to get in the ballpark. An example. I cut and polish opals. We have charts to gauge the matrix color, the flash patterns in the stone, pictures that show examples of the different kinds of opal (white, crystal, semi-crystal, boulder, black opal etc.). Is there anything available for meteorites. The 3-7 numbers used to indicate chondrule density, how is that determined? Is it so many chondrules for a certain surface area? Is it the condition of the chondrules? If they are rating the stone from 3-7, then they must have some sort of metrics they use. I would imagine h-l-ll is determined by some sort of lab equipment. But is there some general information that can be used to at least give us an idea of magnetic attraction? I know I can take a handful of similar sized unclassified NWA's, and a magnet will have a strong, medium or very low attraction to these stones. Is this good enough to get an approximate idea of h-l-ll? Since I started this hobby about 3 months ago, I have purchased just about all of the popular books on the subject yet I don't recall seeing any charts or something on this subject. Thanks for reading. Walter L. Newton Golden, Co P.S. Any guidelines on how to slice meteorites? What I mean is, do you slice in a direction that gives you the most surface area, or in some direction that gives you the best view of the matrix and chondrules? Is there any way to know what direction will give you the best looking slice, showing the best looking innards. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
AW: [meteorite-list] How they classify Meteorites
I heard, that in some cases a microprobe is very helpful. But they are expensive - see: http://kuerzer.de/microprob Hmm, today Ken Regelman posted to the group, that he has developed a guideline for classifying types. Perhaps you can ask him? Do you have already O.Norton: The Cambridge Encyclopedia of Meteorites ? A fine book, where you can learn more about the different types. Comprehensive and well illustrated with pictures. Buckleboo! Martin -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Walter L. Newton Gesendet: Donnerstag, 13. Juli 2006 23:06 An: meteorite-list@meteoritecentral.com Betreff: [meteorite-list] How they classify Meteorites Hi What are the steps that a lab takes to classify a meteorite? Are there any simple guidelines that we can use to get in the ballpark. An example. I cut and polish opals. We have charts to gauge the matrix color, the flash patterns in the stone, pictures that show examples of the different kinds of opal (white, crystal, semi-crystal, boulder, black opal etc.). Is there anything available for meteorites. The 3-7 numbers used to indicate chondrule density, how is that determined? Is it so many chondrules for a certain surface area? Is it the condition of the chondrules? If they are rating the stone from 3-7, then they must have some sort of metrics they use. I would imagine h-l-ll is determined by some sort of lab equipment. But is there some general information that can be used to at least give us an idea of magnetic attraction? I know I can take a handful of similar sized unclassified NWA's, and a magnet will have a strong, medium or very low attraction to these stones. Is this good enough to get an approximate idea of h-l-ll? Since I started this hobby about 3 months ago, I have purchased just about all of the popular books on the subject yet I don't recall seeing any charts or something on this subject. Thanks for reading. Walter L. Newton Golden, Co P.S. Any guidelines on how to slice meteorites? What I mean is, do you slice in a direction that gives you the most surface area, or in some direction that gives you the best view of the matrix and chondrules? Is there any way to know what direction will give you the best looking slice, showing the best looking innards. __ 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
AW: [meteorite-list] How they classify Meteorites
Hi again... Martin answered... I heard, that in some cases a microprobe is very helpful. But they are expensive - see: http://kuerzer.de/microprob Hmm, today Ken Regelman posted to the group, that he has developed a guideline for classifying types. Perhaps you can ask him? Do you have already O.Norton: The Cambridge Encyclopedia of Meteorites? A fine book, where you can learn more about the different types. Comprehensive and well illustrated with pictures. Buckleboo! Martin I understand the different types, what my question was getting at is how much typing can we do without expensive lab equipment? Or is every phase of meteorite typing done with lab equipment. Walter L. Newton __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: AW: [meteorite-list] How they classify Meteorites
On 7/13/06, Martin Altmann [EMAIL PROTECTED] wrote: I heard, that in some cases a microprobe is very helpful. But they are expensive - see: http://kuerzer.de/microprob Pretty funny Martin. For those who might not get the joke, try adding the word electron in front of microprobe as in: http://web.mit.edu/e-probe/www/ Those tiny electrons add a couple of magnitudes to the price. Cheers, Martin __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
AW: [meteorite-list] How they classify Meteorites
No, it was only a joke, But to explain the criteria for the different types --- people wrote whole books about, because it isn't trivial. So an answer would be somewhat extremely long. Hence more simple it would be to read Norton's book, which is written a quite clear style, so that one can understand it well, without having a degree in mineralogy. If you plan to stay longer at meteorite collecting, it is well worth the invest - I'm collecting since a long time and I didn't regret to have bought it. An idea of the different types you may also get from David Weir's phantastic site: http://www.meteoritestudies.com/ Martin PS: A typing can't be done totally without equipment, only guesses one can make. -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Walter L. Newton Gesendet: Donnerstag, 13. Juli 2006 23:53 An: meteorite-list@meteoritecentral.com Betreff: AW: [meteorite-list] How they classify Meteorites Hi again... Martin answered... I heard, that in some cases a microprobe is very helpful. But they are expensive - see: http://kuerzer.de/microprob Hmm, today Ken Regelman posted to the group, that he has developed a guideline for classifying types. Perhaps you can ask him? Do you have already O.Norton: The Cambridge Encyclopedia of Meteorites? A fine book, where you can learn more about the different types. Comprehensive and well illustrated with pictures. Buckleboo! Martin I understand the different types, what my question was getting at is how much typing can we do without expensive lab equipment? Or is every phase of meteorite typing done with lab equipment. Walter L. Newton __ 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
AW: [meteorite-list] How they classify Meteorites
But... I have one of those electron-microprobes... I use it for testing the age of French cheese. I can use it on meteorites? :) Walter L. Newton Golden, Co 80401 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
