Re: [meteorite-list] Caliche
Hi Mark, Yes, I was under the impression that Gardners in the, for example, desert SW US hated this stuff because it was so difficult to penetrate (cement-like) and that water would not penetrate it. I started using a dental pick and brass brush on a whopper 7 lb NWA 869 I got from Dean (thanks Dean, the meteorite is great). I will now use a combination of the dental pick and a drop or two of acetic acid and see how that goes on those tough spots. There is something therapeutic about cleaning meteorites (strange, I know). I have gotten some really nice and inexpensive specimens in recent months. I need to post some (YAWN) pictures. -Walter - - Original Message - From: MarkF [EMAIL PROTECTED] To: Walter Branch [EMAIL PROTECTED] Cc: meteor list [EMAIL PROTECTED] Sent: Thursday, December 02, 2004 6:45 PM Subject: Re: [meteorite-list] Caliche Hi Walter I'm surprised this question hasn't come up more often. Its a common problem in paleo and archaeo dig sites and of course, they will most often have some undergrad attack it with dental picks and such so as to not loose any of the specimen, but other methods are usable for calcium carbonates, depending on your desire to attack it. Acetic acid would be one option, and although water is the solvent which put it there in the first place, its often slow. There are better acids for such, and I believe I heard someone say they used one of those products you mentioned like lime away or clr. But on any of these chemical removals, it sure wouldn't want to be done on something to be studied as there surely will be some interaction with the specimen. Mark - Original Message - From: Walter Branch [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, December 02, 2004 11:11 AM Subject: [meteorite-list] Caliche Hello Everyone, Speaking of Caliche... Does the Caliche (form of calcium carbonate) that we sometimes see on desert meteorites replace the fusion crust that is present or does it form a layer over the crust? -Walter __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Caliche
Hello Walter, Caliche is a deposit and covers the crust. I have removed it from a few meteorites now and have found nice crust underneath. Caliche Is water soluble and therefore is the best way to remove it, just incase anyone wanted to know. : ) Thanks, Tom peregrineflier IMCA 6168 http://www.frontiernet.net/~peregrineflier/Peregrineflier.htm - Original Message - From: Walter Branch [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, December 02, 2004 9:11 AM Subject: [meteorite-list] Caliche Hello Everyone, Speaking of Caliche... Does the Caliche (form of calcium carbonate) that we sometimes see on desert meteorites replace the fusion crust that is present or does it form a layer over the crust? -Walter __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Caliche, See Photos
Hello Walter, and list You can have both situation, but generally it infects more the inside throught weathering cracks than replace the outside fusion crust. Look at www.caillou-noir.com/Caliche.htm I have 2 example of caliche. Best regards Michel FRANCO Caillou Noir www.caillou-noir.com BP 16, 100 Chemin des Campènes 74400 Les Praz de Chamonix FRANCE - Original Message - From: Walter Branch [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, December 02, 2004 5:11 PM Subject: [meteorite-list] Caliche Hello Everyone, Speaking of Caliche... Does the Caliche (form of calcium carbonate) that we sometimes see on desert meteorites replace the fusion crust that is present or does it form a layer over the crust? -Walter __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Caliche, See Photos
Hi Michel, Nice pictures. Thanks very much. -Walter - - Original Message - From: Michel Franco [EMAIL PROTECTED] To: Walter Branch [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Thursday, December 02, 2004 11:47 AM Subject: Re: [meteorite-list] Caliche, See Photos Hello Walter, and list You can have both situation, but generally it infects more the inside throught weathering cracks than replace the outside fusion crust. Look at www.caillou-noir.com/Caliche.htm I have 2 example of caliche. Best regards Michel FRANCO Caillou Noir www.caillou-noir.com BP 16, 100 Chemin des Campènes 74400 Les Praz de Chamonix FRANCE - Original Message - From: Walter Branch [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, December 02, 2004 5:11 PM Subject: [meteorite-list] Caliche Hello Everyone, Speaking of Caliche... Does the Caliche (form of calcium carbonate) that we sometimes see on desert meteorites replace the fusion crust that is present or does it form a layer over the crust? -Walter __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Caliche
Hi Tom, Caliche is water soluble? I did not think that is was. I thought a product such as Lime Away was the best method to remove caliche. -Walter - - Original Message - From: Tom AKA James Knudson [EMAIL PROTECTED] To: Walter Branch [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Thursday, December 02, 2004 11:34 AM Subject: Re: [meteorite-list] Caliche Hello Walter, Caliche is a deposit and covers the crust. I have removed it from a few meteorites now and have found nice crust underneath. Caliche Is water soluble and therefore is the best way to remove it, just incase anyone wanted to know. : ) Thanks, Tom peregrineflier IMCA 6168 http://www.frontiernet.net/~peregrineflier/Peregrineflier.htm - Original Message - From: Walter Branch [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, December 02, 2004 9:11 AM Subject: [meteorite-list] Caliche Hello Everyone, Speaking of Caliche... Does the Caliche (form of calcium carbonate) that we sometimes see on desert meteorites replace the fusion crust that is present or does it form a layer over the crust? -Walter __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Caliche
Hello Walter and list, caliche is deposited by water. If you soak a meteorite in water for a few hours, the caliche will dissolve and can be scrubbed off with a soft brush. Thanks, Tom peregrineflier IMCA 6168 http://www.frontiernet.net/~peregrineflier/Peregrineflier.htm - Original Message - From: Walter Branch [EMAIL PROTECTED] To: Tom AKA James Knudson [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Thursday, December 02, 2004 10:30 AM Subject: Re: [meteorite-list] Caliche Hi Tom, Caliche is water soluble? I did not think that is was. I thought a product such as Lime Away was the best method to remove caliche. -Walter - - Original Message - From: Tom AKA James Knudson [EMAIL PROTECTED] To: Walter Branch [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Thursday, December 02, 2004 11:34 AM Subject: Re: [meteorite-list] Caliche Hello Walter, Caliche is a deposit and covers the crust. I have removed it from a few meteorites now and have found nice crust underneath. Caliche Is water soluble and therefore is the best way to remove it, just incase anyone wanted to know. : ) Thanks, Tom peregrineflier IMCA 6168 http://www.frontiernet.net/~peregrineflier/Peregrineflier.htm - Original Message - From: Walter Branch [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, December 02, 2004 9:11 AM Subject: [meteorite-list] Caliche Hello Everyone, Speaking of Caliche... Does the Caliche (form of calcium carbonate) that we sometimes see on desert meteorites replace the fusion crust that is present or does it form a layer over the crust? -Walter __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Caliche
Hi Walter I'm surprised this question hasn't come up more often. Its a common problem in paleo and archaeo dig sites and of course, they will most often have some undergrad attack it with dental picks and such so as to not loose any of the specimen, but other methods are usable for calcium carbonates, depending on your desire to attack it. Acetic acid would be one option, and although water is the solvent which put it there in the first place, its often slow. There are better acids for such, and I believe I heard someone say they used one of those products you mentioned like lime away or clr. But on any of these chemical removals, it sure wouldn't want to be done on something to be studied as there surely will be some interaction with the specimen. Mark - Original Message - From: Walter Branch [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, December 02, 2004 11:11 AM Subject: [meteorite-list] Caliche Hello Everyone, Speaking of Caliche... Does the Caliche (form of calcium carbonate) that we sometimes see on desert meteorites replace the fusion crust that is present or does it form a layer over the crust? -Walter __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] caliche cleaning and Parnallee question
Dave and List, Dave, you also used to collect minerals (or still do). Remember how ugly an amethyst looks after a wash with HCL? Instead of risking fragments to break away or having other mineral constuents dissolved, I'd rather leave some caliche Also, having just bought a 40g slice of Parnallee (Wow!!!) can any one confirm whether it is a L3.6 or an LL3.6? Congratulations! Yes, I can confirm: LL3.6, brecciated; gas-rich; unequilibrated; microgabbro clasts - some people classified it as an LL3.7 * * Reference: NELSON V.E. et al. (2002) Size-frequency distribution of chondrules and chondrule fragments in LL3 chondrites: Implications for parent-body fragmentation of chondrules (MAPS 37-10, 2002, 1361-1376). To: [EMAIL PROTECTED] [EMAIL PROTECTED] __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] caliche cleaning and Parnallee question
Hi Bernd and list Oh yes, I have a magnificent collection of rocks (terrestrial) and I agree - I'd leave the caliche - if necessary lightlybrush it off, don't forget thatTroilite and other sulphides will also reactwith the HCL to give off a smelly gas! You could be left will a stinky sludge!!! thanks for the data dave IMCA #0092 ---Original Message--- From: [EMAIL PROTECTED] Date: 10/05/2004 17:24:10 To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: [meteorite-list] caliche cleaning and Parnallee question Dave and List, Dave, you also used to collect minerals (or still do). Remember how ugly an amethyst looks after a wash with HCL? Instead of risking fragments to break away or having other mineral constuents dissolved, I'd rather leave some caliche Also, having just bought a 40g slice of Parnallee (Wow!!!) can any one confirm whether it is a L3.6 or an LL3.6? Congratulations! Yes, I can confirm: LL3.6, brecciated; gas-rich; unequilibrated; microgabbro clasts - some people classified it as an LL3.7 * * Reference: NELSON V.E. et al. (2002) Size-frequency distribution of chondrules and chondrule fragments in LL3 chondrites: Implications for parent-body fragmentation of chondrules (MAPS 37-10, 2002, 1361-1376). To: [EMAIL PROTECTED] [EMAIL PROTECTED] . IncrediMail - Email has finally evolved - Click Here__ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] caliche cleaning
Lime-Away or CLR Works great for me. I cleaned all my Gold Basins and SAU 001 meteorites that way. Mike Farmer - Original Message - From: stan . [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Saturday, May 08, 2004 11:28 PM Subject: [meteorite-list] caliche cleaning I have seen several suggestions for cleaning caliche off of desert meteorites, but would anyone care to suggest if there would be any safe way to remove caliche specifically from a 2 kg+ cumulate eucrite? On a smaller piece I'd be willing to take a gamble and give it a shot, but needless to say the piece in question is not something that I would go dipping into a container of phosphoric acid just to see what happens.. Thanks in advance.. stan _ Express yourself with the new version of MSN Messenger! Download today - it's FREE! http://messenger.msn.com/go/onm00200471ave/direct/01/ __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
