Re: [meteorite-list] impactite vs. impact glass
Hello Bob and all, Probably this nomenclature is applicable to all kinds of impact related rocks, as are meteorites. It seem to me that the term 'impact melt breccia' should be discarded, because it is usually NOT a brecciated impact melt rock set in a clastic or igneous matrix, but clasts of non melted rock set in a molten matrix. Usually the term accompaning 'breccia' refers to the nature of the clasts itselves, not to the nature of the matrix. So themore correctterm for 'impact melt breccia' would be 'impact melt rock' or 'impact melt rock with lithic clasts'. That´s how I understood it. In a singles impact eventthe melting and solidification of a rock can not predate the formation of a breccia of this materialdue to the same impact event. So truly (impact) brecciated impact melt rocks (=impact melt breccias) are extremly rare on earth, but elsewhere (an impact melt rock may be brecciated by another impact event, if it is monomict, it is an impact meltbreccia, if it is polymict it is something else, maybe a lithic breccia or a regolith breccia...). Well, I hope I got it right, scientists seem to love that ;-) Best wishes Dennis Harries *NO WAR* http://www.bgs.ac.uk/SCMR/docs/paper_12/scmr_paper_12_5.pdf Hello Dave and Dennis and all, This USGS paper raises more questions. Under the term "Impact Melt Breccia" it recommends that it's use be "discarded"! It doesn't suggest a replacement term. It's not obvious to me what the new term should be, so could someone tell me, what is the "preferred" term? Since the author is Stoffler, I'm assuming these terms are applicable for use in describing meteorites. But this may not be the case. I may be wrong in my assumption, and this list of terms may be only applicable for metamorphic processes involving Terran, Lunar, and Martian impact events and their resultant impactites. Is there a separate list of "approved" terms for asteroidal impact events and meteorites? More questions still, BOb V. MSN 8 helps ELIMINATE E-MAIL VIRUSES. Get 2 months FREE*. __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Iron cutting problems :))
Hello all I want to ask You how You cut nantan or any other iron meteorite ? Besouse yesterday I received my 5kg nantan and start to cut it on one end (small slice around 7x4cm) and I destroy 2 diamond blades 0.5mm. This was verry strange, becouse diamonds from one half of this blades was weared out and from another not. Now I have this blades with diamonds for example 4mm on one side and 5mm on another (in diameter). This can be any troilite inclusion or what ? Blade was cut this nantan up to 1.5cm inside and then stop cutting and start waste blade. Anyone know what happend ? This was my first iron cutting on my machine. Thanks for help -[ MARCIN CIMALA ]-[ I.M.C.A.#3667 ]- http://www.meteoryt.net [EMAIL PROTECTED] http://www.polandmet.com [EMAIL PROTECTED] http://www.vistapro.prv.pl +GSM (607) 535 195 [ Member of: Polish Meteoritical Society ] __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] EBAY SCAM??????
Tom, What happens when a meteorite collector discovers ebay? They go bonkers! I've seen it happen many times. Sometimes they're new to meteorites, in which case they often overpay. If he's new to meteorites, he'll eventually find other venues to acquire meteorites. If they already collect meteorites, and are simply new to ebay, eventually he'll calm down. Probably not a list member, and no harm is done writing to this person and inviting him/her to join the list. I've done so in the past and they're usually grateful to learn the meteorite-list community exists where they can learn more. You might try this. Just don't comment on his/her spending habits so as not to be accused of interfering with an auction. Best, Charlie __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] EBAY SCAM??????
Hi ddo9876 bid on one of my meteorites on Ebay last night, around midnight, had payment by 9 am today. No problem here. Thanks. Ed Tom aka James Knudson [EMAIL PROTECTED] wrote: Hello List, Just a heads up (MAYBE) There is a buyer ( ddo9876 )on ebay withno feedback buying hundreds of dollars on meteorites today. I wonder if heis for real? Seems like every thing I looked at he has a bid on. And hasbought a lot of buy it nows.Thanks, TomThe proudest member of the IMCA 6168__Meteorite-list mailing list[EMAIL PROTECTED]http://www.pairlist.net/mailman/listinfo/meteorite-listDo you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop!
Re: [meteorite-list] Iron cutting problems :))
Marcin, Just a few weeks ago, I posted a short summary message on this subject. It should be in archive on March 1. The best answer is to use a big metal-cutting band saw. That's probably the only good way to cut big irons. I have cut Campos on a lapidary saw, but it takes a very long time and the blade suffers. I use a homemade gravity feed system. I haven't cut enough to gauge blade wear. I've heard that A Meteorite magazine article by Allen Langheinrich discusses the details, but I haven't seen the article. I think it might have been in the August 97 issue (which is sold out). The classic advice is to leave it to the pros. Some would probably be happy to give you an estimate of the cost. --Jamie Stephens, IMCA 2828 PolandMET.com wrote: Hello all I want to ask You how You cut nantan or any other iron meteorite ? Besouse yesterday I received my 5kg nantan and start to cut it on one end (small slice around 7x4cm) and I destroy 2 diamond blades 0.5mm. This was verry strange, becouse diamonds from one half of this blades was weared out and from another not. Now I have this blades with diamonds for example 4mm on one side and 5mm on another (in diameter). This can be any troilite inclusion or what ? Blade was cut this nantan up to 1.5cm inside and then stop cutting and start waste blade. Anyone know what happend ? This was my first iron cutting on my machine. Thanks for help -[ MARCIN CIMALA ]-[ I.M.C.A.#3667 ]- http://www.meteoryt.net [EMAIL PROTECTED] http://www.polandmet.com [EMAIL PROTECTED] http://www.vistapro.prv.pl +GSM (607) 535 195 [ Member of: Polish Meteoritical Society ] __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Iron cutting problems :))
It sounds to me like the arbor you have the blade mounted to is not perfectly (90 degrees) perpendicular to the feed direction of your saw vice with the meteorite mounted in it. This skewed alignment will cause the type of wear you're talking about. Make sure you're using a coolant oil designed for diamonds saws...like Almag or the equivalent. You don't mention the diameter of your blade, but judging by the thickness you have mentioned, it sounds like you're using a 10 inch or smaller blade. I have used a 20 inch diamond saw with a 0.065 inch thick blade to slice lots of iron meteorites, including Chinga, which is very hard. Using a small diameter blade on a big meteorite produces a lot of heat which is one of the biggest enemies of diamond blades. Your blade is a bit on the thin side as well. A 0.5mm blade is only 0.020 inches. This allows the blade to flex during cutting especially if you put too much feed pressure or weight on it. Choose blade 0.050 (1.25mm) or thicker and don't over pressure the feed rate. Your blade RPMs can also be a source of problems. Run the blade too slow, and I guarantee it will follow a path that isn't straight. Campos are very inexpensive compared to diamond blades, you can afford to loose a little more material in the cutting process. Use a bigger, thicker blade. Best, John Gwilliam At 10:47 AM 3/22/03 +0100, PolandMET.com wrote: Hello all I want to ask You how You cut nantan or any other iron meteorite ? Besouse yesterday I received my 5kg nantan and start to cut it on one end (small slice around 7x4cm) and I destroy 2 diamond blades 0.5mm. This was verry strange, becouse diamonds from one half of this blades was weared out and from another not. Now I have this blades with diamonds for example 4mm on one side and 5mm on another (in diameter). This can be any troilite inclusion or what ? Blade was cut this nantan up to 1.5cm inside and then stop cutting and start waste blade. Anyone know what happend ? This was my first iron cutting on my machine. Thanks for help -[ MARCIN CIMALA ]-[ I.M.C.A.#3667 ]- http://www.meteoryt.net [EMAIL PROTECTED] http://www.polandmet.com [EMAIL PROTECTED] http://www.vistapro.prv.pl +GSM (607) 535 195 [ Member of: Polish Meteoritical Society ] __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] EBAY SCAM??????
Hi Tom and list, I wouldn't worry too much about this buyer. I looked up a couple of his auctions. Seemed that he was unsure of a ceiling bid and kept putting in more bids on the same auction, essentially bidding against himself, (did that myself the first time out). He or she will learn. :-) Steve Sachs IMCA#9210 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] thanks
I just got my theutha meteorite today.It is 26 grams of black heavenly beauty.I want to thank all the parties involved in retreiving this beautiful meteorite.It was worth the price I paid for it.This is a tribute to all the people who are meteorite hunters.You all do a great job. And for this, I salute you all.Hopefully soon I will be lucky enough to hope to even find a meteorite somewhere.I keep looking to the skys to see if I will ever get the opurtunity.Well done again THEUTHA hunters. steve arnold, chicago, usa = Steve R.Arnold, Chicago, IL, 60120 I. M. C. A. MEMBER #6728 Illinois Meteorites Website url http://stormbringer60120.tripod.com __ Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop! http://platinum.yahoo.com __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Big-Ass Purple Campo
All, And now for an update on the Big-Ass Campo formerly known as Rusty. As you may recall (those who care, anyway), I bought a 19-pound Campo at the Tucson 2003 show this year. No New Campo this, it was definitely an Old-School specimen. Totally covered in rust. I contacted Bill Mason and bought one of his new Meteorite Treatment Kits. Unfortunately, I've had mixed results with it. Yes, the rust-eating acid worked very well indeed. Unfortunately, the instructions included with the kit left a bit to be desired. In one place they say to neutralize the acid next, then soak it in alcohol. In another place, it wrongly states to soak in alcohol first and _then_ use the acid neutralizer. (Guess which instructions I followed.) I also followed the instruction set which didn't happen to mention that the acid neutralizer needs to be diluted with water first (In one place the instructions say dilute 10:1 with water, and in another it says 20:1). The result was a sticky meteorite with way too much neutralizer on it. Thus, when the oven baking was in progress, my house was filled with a nasty burning chemical stink. The heat also apparently destroyed the neutralizer chemicals, leaving me with an ugly white deposit on the specimen (The fact that the cat grew another head is probably just a coincidence). So I went back and re-did the whole thing. At least the acid treatment went fast because most of the rust was already gone. I also took the time to work over my 4-inch long Nantan with the rust remover (It's now a nice 2-inch long Nantan). I got the order of treatment and the concentration of chemicals correct this time, I think. Everything went well until the final coating with the spray-on sealant. Now, my Nantan and my Campo are purple. I can think of perhaps three reasons for this: (1) I left the two specimens in the sun all day to dry cure the spray coating. Did a chemical/color change occur because of light, heat, or both? (2) Perhaps the acid neutralizer was still too concentrated. There may have been a reaction between the neutralizer and the spray-on coating. (3) Perhaps the spray-on coating is simply too thick. I used four coats. The instructions _did_ say spray on more layers to add mil thickness, but then again, they failed me before. There is nothing in the instructions warning about Purple Haze or how to avoid it. Has anyone else have this problem? So now I'm faced with removing the coating with acetone and trying yet again. I'm also wondering how the acetone will affect the special rust-inhibiting chemicals applied to the specimen by the various treatment steps. Will I have to start all over again, or can I just spray on a new coating and not worry? More important, how do I prevent the Purple Haze from returning? - Bob Martino, Tucson, AZ Can you really name a star? Read the Truth! http://home.columbus.rr.com/starfaq/ . __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Big-Ass Purple Campo
Man, Thanks for the rundown. Boy, am I glad I didn't get any of that s--t! For my nifty Tazas, I guess I'll resort to the trusty DW40 overnight followed by soft wire brush on a flexible shaft. Best wishes, Michael on 3/22/03 10:29 AM, Bob Martino at [EMAIL PROTECTED] wrote: All, And now for an update on the Big-Ass Campo formerly known as Rusty. As you may recall (those who care, anyway), I bought a 19-pound Campo at the Tucson 2003 show this year. No New Campo this, it was definitely an Old-School specimen. Totally covered in rust. I contacted Bill Mason and bought one of his new Meteorite Treatment Kits. Unfortunately, I've had mixed results with it. Yes, the rust-eating acid worked very well indeed. Unfortunately, the instructions included with the kit left a bit to be desired. In one place they say to neutralize the acid next, then soak it in alcohol. In another place, it wrongly states to soak in alcohol first and _then_ use the acid neutralizer. (Guess which instructions I followed.) I also followed the instruction set which didn't happen to mention that the acid neutralizer needs to be diluted with water first (In one place the instructions say dilute 10:1 with water, and in another it says 20:1). The result was a sticky meteorite with way too much neutralizer on it. Thus, when the oven baking was in progress, my house was filled with a nasty burning chemical stink. The heat also apparently destroyed the neutralizer chemicals, leaving me with an ugly white deposit on the specimen (The fact that the cat grew another head is probably just a coincidence). So I went back and re-did the whole thing. At least the acid treatment went fast because most of the rust was already gone. I also took the time to work over my 4-inch long Nantan with the rust remover (It's now a nice 2-inch long Nantan). I got the order of treatment and the concentration of chemicals correct this time, I think. Everything went well until the final coating with the spray-on sealant. Now, my Nantan and my Campo are purple. I can think of perhaps three reasons for this: (1) I left the two specimens in the sun all day to dry cure the spray coating. Did a chemical/color change occur because of light, heat, or both? (2) Perhaps the acid neutralizer was still too concentrated. There may have been a reaction between the neutralizer and the spray-on coating. (3) Perhaps the spray-on coating is simply too thick. I used four coats. The instructions _did_ say spray on more layers to add mil thickness, but then again, they failed me before. There is nothing in the instructions warning about Purple Haze or how to avoid it. Has anyone else have this problem? So now I'm faced with removing the coating with acetone and trying yet again. I'm also wondering how the acetone will affect the special rust-inhibiting chemicals applied to the specimen by the various treatment steps. Will I have to start all over again, or can I just spray on a new coating and not worry? More important, how do I prevent the Purple Haze from returning? - Bob Martino, Tucson, AZ Can you really name a star? Read the Truth! http://home.columbus.rr.com/starfaq/ . __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts. Bertrand Russell -- Worth Seeing: - Earth at night from satelite: http://antwrp.gsfc.nasa.gov/apod/image/0011/earthlights_dmsp_big.jpg - Interactive Lady Liberty: http://doody36.home.attbi.com/liberty.htm - Earth - variety of choices: http://www.fourmilab.ch/earthview/vplanet.html -- Panoramic view of Meteor Crater: http://www.virtualguidebooks.com/Arizona/GrandCanyonRoute66/MeteorCrater/Met eorCraterRimL.html -- Cool Calendar Clock: http://www.yugop.com/ver3/stuff/03/fla.html -- Michael Blood Meteorites Didgeridoos for sale at: http://www.michaelbloodmeteorites.com/ __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Add.... auction ending soon 6-block Sikhote stams
Hi I have an auction ending soon: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemcategory=3239item=2165420995rd=1 A 6-block of the famous Sikhote-Alin stamp. Best Lars
[meteorite-list] Re: Purple Campo
One year ago I used the Mason Rust Remover Kit on my 20 inch by 13 inch by 3/8 inch thick slice of Nantan, and a few old Campos and a 13 lb. Toluca. It worked wonders! First I removed the rust with a wire brush on my drill, then I followed the instructions. No problem. The slice had been rusting away, getting really ugly, but has been stable for the past year, no sign of the rust returning, and as the members of the COMETS club can attest, it's a beauty. I suspect the purple haze may be from leaving the meteorite out in the sun to dry for a day. But I have not experienced that problem, as yet. I'm sure Bill Mason will be able to help you. High Regards, Fred Hall / Meteorhall
[meteorite-list] Fwd: Purple Campo
---BeginMessage--- One year ago I used the Mason Rust Remover Kit on my 20 inch by 13 inch by 3/8 inch thick slice of Nantan, and a few old Campos and a 13 lb. Toluca. It worked wonders! First I removed the rust with a wire brush on my drill, then I followed the instructions. No problem. The slice had been rusting away, getting really ugly, but has been stable for the past year, no sign of the rust returning, and as the members of the COMETS club can attest, it's a beauty. I suspect the purple haze may be from leaving the meteorite out in the sun to dry for a day. But I have not experienced that problem, as yet. I'm sure Bill Mason will be able to help you. High Regards, Fred Hall / Meteorhall ---End Message---
[meteorite-list] Gold Basin Warning!!!!!
Hello List, I hunted GB today and the only find was a real nice 320g Rattle snake. Be careful out there! Thanks, Tom The proudest member of the IMCA 6168 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
