[meteorite-list] Fwd: Sutter's Mill BSE - two more
From: Carl Agee <agee_at_meteoritecentral.com>
Date: Sat, 26 May 2012 00:22:43 -0600 Message-ID: <CADYrzho07_OgmSL9ddgkitE4JwJ7fi5HBtm0oH2j=vNW=1OEZA_at_mail.gmail.com> From: Carl Agee <agee at unm.edu> Date: Sat, May 26, 2012 at 12:19 AM Subject: Re: [meteorite-list] Sutter's Mill BSE - two more To: "Sterling K. Webb" <sterling_k_webb at sbcglobal.net> Cc: Meteorite List <meteorite-list at meteoritecentral.com>, Richard Montgomery <rickmont at earthlink.net> But I have some more goodies to report on NWA 7034...its Rb/Sr age for one thing :) Carl Agee On Fri, May 25, 2012 at 11:09 PM, Sterling K. Webb <sterling_k_webb at sbcglobal.net> wrote: >> >> You haven't heard about NWA 7034? Oh, you will... > > > NWA 7034? They can read about it here: > http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2690.pdf > > > > Sterling K. webb > -------------------------------------------------------------------------- > > ----- Original Message ----- From: "Carl Agee" <agee at unm.edu> > To: "Richard Montgomery" <rickmont at earthlink.net> > Cc: "meteoritelist meteoritelist" <meteorite-list at meteoritecentral.com> > Sent: Friday, May 25, 2012 11:15 PM > > Subject: Re: [meteorite-list] Sutter's Mill BSE - two more > > > Hi Richard, > > I haven't seen a thin section of Sutter's Mill yet, but my guess is > that it will be very dark, just like the meteorite, so maybe not that > illuminating. I prefer backscatter electron images because they not > only show texture, but also image chemical compositional variations. > Like the dark olivines in my images?- ?they are Mg2SiO4-rich, the > light shaded olivines are Fe2SiO4-rich. Bright patches indicate high > iron or Ti or Cr, and so on. > > As to the CaO, the electron microprobe does not do carbon very well so > it usually comes up with low totals on carbonates. I looked at the > data today and we found 4 separate crystals with this composition in > one of the small SM sections -- after perusing the CM literature > today, I am pretty sure this is calcite or aragonite -- thought by > some to form during aqueous alteration and commonly found in CMs. > > With respect to the classification and type, I will leave that to the > unequilibrated chondrite experts like Jeff Grossman and Alan Rubin. > > MetSoc will be very interesting this year: Tissint, Sutter's Mill, and > NWA 7034. You haven't heard about NWA 7034? Oh you will... > > Carl Agee > > > On Fri, May 25, 2012 at 7:04 PM, Richard Montgomery > <rickmont at earthlink.net> wrote: >> >> Carl and List, >> >> I'm struck by the chondrule variation...can't wait to see a TS (hi >> Anne!)....so it's time to ask about the rabbit hole: >> >> As I mentioned I'm just guessing here....not a CM2, due to chondrules >> actually so present, right? Not a CM3 either (if there ever is such a >> thing) >> due to the rim alterations and aqueous stuff; dark matrix like a CM, yet >> more crowded chondrules; complete CaO crystals; lacking so far of seeing >> any >> CAIs....what's your guess at this point?? >> >> Next Halloween I can dress up as a petrologist scientist....but won't >> fool >> anyone. Fun to speculate, though. >> >> Richard M >> >> >> ----- Original Message ----- From: "Carl Agee" <agee at unm.edu> >> To: "meteoritelist meteoritelist" <meteorite-list at meteoritecentral.com>; >> "Jeff Grossman" <jngrossman at gmail.com> >> Sent: Friday, May 25, 2012 2:03 PM >> Subject: Re: [meteorite-list] Sutter's Mill BSE - two more >> >> >>> Jeff, >>> >>> You mean the area in the SW quadrant? It's permeated with the bright >>> material? It could be sulfide, but I didn't get a chance to EDS or >>> probe it yesterday. It's all somewhat bewildering, there is so much >>> look at, so I am starting with the simple stuff that give good >>> microprobe totals -- haha!. Beware of this meteorite! Like going down >>> the rabbit hole.... >>> >>> Carl >>> >>> >>> ----------------------------------------- >>> Carl, >>> >>> What's the difference between the two lithologies visible in the first >>> of these two photos? >>> >>> Jeff >>> >>> On 5/25/2012 2:19 PM, Carl Agee wrote: >>> >>>> >>>> >>>> http://www.facebook.com/photo.php?fbid=4042491099560&set=a.1076549432872.2012978.1200325441&type=1&ref=nf >>> >>> >>> >>>> >>>> >>>> http://www.facebook.com/photo.php?fbid=4042494859654&set=a.1076549432872.2012978.1200325441&type=1&ref=nf >>> >>> >>> >>>> >>> >>> >>> -- >>> 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/ >>> ______________________________________________ >>> >>> Visit the Archives at >>> http://www.meteoritecentral.com/mailing-list-archives.html >>> Meteorite-list mailing list >>> Meteorite-list at meteoritecentral.com >>> http://six.pairlist.net/mailman/listinfo/meteorite-list >>> >> > > > > -- > 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/ > ______________________________________________ > > Visit the Archives at > http://www.meteoritecentral.com/mailing-list-archives.html > Meteorite-list mailing list > Meteorite-list at meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list -- 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/ -- 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/Received on Sat 26 May 2012 02:22:43 AM PDT |
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