[meteorite-list] AD - Black Beauty
From: Carl Agee <agee_at_meteoritecentral.com>
Date: Thu, 14 Feb 2013 09:45:11 -0700 Message-ID: <CADYrzho56AwfeQJ-8YJJeUSycVz4uK+VobWC2NX7_CsptWmHbQ_at_mail.gmail.com> I agree, in fact I have done numerous break/chip/cleave on BB, especially for the destructive analyses for isotopes. But the flat surfaces from saw cuts, ground and polished, are needed for microprobe and SEM. Carl Agee -- Carl B. Agee Director and Curator, Institute of Meteoritics Professor, Earth and Planetary Sciences MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 Tel: (505) 750-7172 Fax: (505) 277-3577 Email: agee at unm.edu http://meteorite.unm.edu/people/carl_agee/ On Thu, Feb 14, 2013 at 9:38 AM, Galactic Stone & Ironworks <meteoritemike at gmail.com> wrote: > A sterile set of manual tools works wonders - good old fashioned > cleave/break/chip. :) > > -- > ------------------------------------------------------------- > Web - http://www.galactic-stone.com > Facebook - http://www.facebook.com/galacticstone > Twitter - http://twitter.com/GalacticStone > Pinterest - http://pinterest.com/galacticstone > RSS - http://www.galactic-stone.com/rss/126516 > ------------------------------------------------------------- > > > On 2/14/13, Carl Agee <agee at unm.edu> wrote: >> Hi Mendy, >> >> No, cutting in distilled water has no effect on the oxygen isotopes of >> the bulk rock, nor does it affect the hydrogen isotopes of the martian >> water in NWA 7034. Simply drying the slice after cutting is all you >> need to do. Remember, this is a desert meteorite, exposing it to >> distilled water for a few minutes at room temperature in a saw is >> nothing compared to many years of exposure to the elements in the >> Sahara. Nonetheless, NWA 7034 is relatively unweathered meteorite, it >> is amazingly hard and solid, tough to chip or break. I attribute this >> to its welding during volcanoclastic eruption and/or impact. The only >> weathering products we have identified in NWA 7034 are some fine >> calcite veins that can be traced back to the surface. These are found >> primarily in the outer edges, and are less common the deeper you go >> into the 320 g main mass. On the other hand, we are planning to break >> some material from the deep interior, without water, to search for any >> water soluble minerals that may be affected by water cutting. Lots of >> work still to do! -- mainly because every slice Black Beauty shows >> something new. In my opinion, this rock is actually a volcanic >> conglomerate, that has picked up pebbles and soil particles during its >> flow over the martian surface or during impact. So, in a way each new >> piece of Black Beauty may reveal something more about Mars. I'll stop >> there, as you can see asking me about NWA 7034 is dangerous -- >> especially if you are not ready for a lengthy reply! >> >> Carl Agee >> >> -- >> Carl B. Agee >> Director and Curator, Institute of Meteoritics >> Professor, Earth and Planetary Sciences >> MSC03 2050 >> University of New Mexico >> Albuquerque NM 87131-1126 >> >> Tel: (505) 750-7172 >> Fax: (505) 277-3577 >> Email: agee at unm.edu >> http://meteorite.unm.edu/people/carl_agee/ >> >> >> On Thu, Feb 14, 2013 at 8:34 AM, Mendy Ouzillou <ouzillou at yahoo.com> wrote: >>> Carl, >>> >>> I'm curious. Would cutting the stone in distilled water affect the oxygen >>> isotope ratios? If I remember correctly that was one indicator that was >>> used as proof of water on Mars. >>> >>> Thank you! >>> >>> Mendy >>> >>> On Feb 13, 2013, at 11:37 PM, jason utas <jasonutas at gmail.com> wrote: >>> >>> Hello Carl, >>> On the contrary, the only reason I included the statement regarding >>> ethylene glycol was because I was informed by a customer that at least >>> some of the material on the market had been cut with synthetic >>> lubricant. S/he made a point of purchasing specimens that had not >>> been 'messed with' after making inquiries. >>> >>> And, yes, that statement applies. Perhaps not to the material from >>> the 320 gram stone, but the vast majority of the material I have seen >>> for sale has come from other sources. >>> >>> I've only seen a few grams of slices from Mr. Piatek's stone, but it >>> does not surprise me that you would have curated it well. >>> >>> Though I will say that it was a bit steep. >>> >>> Regards, >>> Jason >>> >>> On Tue, Feb 12, 2013 at 7:31 AM, Carl Agee <agee at unm.edu> wrote: >>>> Hi Jason, >>>> >>>> I looked at your link. I think you need to revise it since it contains >>>> false information about the cutting of Black Beauty (NWA 7034) -- at >>>> least if you are referring to the 320 g main mass that is at the IOM? >>>> The cutting was done with distilled water -- NOT ethylene glycol >>>> (antifreeze). Also, stating in your link that our samples were "messed >>>> with" seems to be a rather unusual way to describe cutting with a fine >>>> diamond wire. >>>> >>>> If you want to know anything specific about Black Beauty, I would be >>>> happy to talk to you about it and how to identify it in hand sample >>>> and nature of the reduced carbon -- my team has been studying this >>>> meteorite with numerous lab techniques since August 2011. >>>> >>>> PS: the Science Article print version will be on newsstands Feb. 15. >>>> >>>> Carl Agee >>>> >>>> -- >>>> Carl B. Agee >>>> Director and Curator, Institute of Meteoritics >>>> Professor, Earth and Planetary Sciences >>>> MSC03 2050 >>>> University of New Mexico >>>> Albuquerque NM 87131-1126 >>>> >>>> Tel: (505) 750-7172 >>>> Fax: (505) 277-3577 >>>> Email: agee at unm.edu >>>> http://meteorite.unm.edu/people/carl_agee/ >>>> >>>> On Tue, Feb 12, 2013 at 3:24 AM, jason utas <jasonutas at gmail.com> wrote: >>>>> >>>>> Hello All, >>>>> I just finished the page for some fragments of the unique water and >>>>> soil-bearing Martian regolith breccia paired with NWA 7034 and a few >>>>> other stones. >>>>> Please see our website for available specimens. >>>>> >>>>> http://www.fallsandfinds.com/page88.php >>>>> >>>>> Thanks! >>>>> Jason >>>>> >>>>> IMCA 7630 >>>>> ______________________________________________ >>>>> >>>>> Visit the Archives at http://www.meteorite-list-archives.com >>>>> Meteorite-list mailing list >>>>> Meteorite-list at meteoritecentral.com >>>>> http://six.pairlist.net/mailman/listinfo/meteorite-list >>>>> >>>>> >>> ______________________________________________ >>> >>> Visit the Archives at http://www.meteorite-list-archives.com >>> Meteorite-list mailing list >>> Meteorite-list at meteoritecentral.com >>> http://six.pairlist.net/mailman/listinfo/meteorite-list >>> >>> >> ______________________________________________ >> >> Visit the Archives at http://www.meteorite-list-archives.com >> Meteorite-list mailing list >> Meteorite-list at meteoritecentral.com >> http://six.pairlist.net/mailman/listinfo/meteorite-list >> > >Received on Thu 14 Feb 2013 11:45:11 AM PST |
StumbleUpon del.icio.us Yahoo MyWeb |