Re: [meteorite-list] Sutter's Mill BSE - two more
Hi Carl and List, Wow, I hadn't heard about NWA 7034 yet. But after looking at the photo, I am keenly interested to hear about it now. It does not visually resemble any achon-ung I have seen before. What a strange, strange, stone. :) Best regards, MikeG -- --- Galactic Stone Ironworks - MikeG Web: http://www.galactic-stone.com Facebook: http://www.facebook.com/galacticstone Twitter: http://twitter.com/GalacticStone RSS: http://www.galactic-stone.com/rss/126516 --- On 5/26/12, Carl Agee a...@unm.edu wrote: 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 rickm...@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 herenot 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 CAIswhat's your guess at this point?? Next Halloween I can dress up as a petrologist scientistbut won't fool anyone. Fun to speculate, though. Richard M - Original Message - From: Carl Agee a...@unm.edu To: meteoritelist meteoritelist meteorite-list@meteoritecentral.com; Jeff Grossman jngross...@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=4042491099560set=a.1076549432872.2012978.1200325441type=1ref=nf http://www.facebook.com/photo.php?fbid=4042494859654set=a.1076549432872.2012978.1200325441type=1ref=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: a...@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@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: a...@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@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- --- Galactic Stone Ironworks - MikeG Web: http://www.galactic-stone.com Facebook: http://www.facebook.com/galacticstone Twitter: http://twitter.com/GalacticStone RSS: http://www.galactic-stone.com/rss/126516
Re: [meteorite-list] Sutter's Mill BSE - two more
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=4042491099560set=a.1076549432872.2012978.1200325441type=1ref=nf http://www.facebook.com/photo.php?fbid=4042494859654set=a.1076549432872.2012978.1200325441type=1ref=nf __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
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=4042491099560set=a.1076549432872.2012978.1200325441type=1ref=nf http://www.facebook.com/photo.php?fbid=4042494859654set=a.1076549432872.2012978.1200325441type=1ref=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: a...@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@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Sutter's Mill BSE - two more
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 herenot 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 CAIswhat's your guess at this point?? Next Halloween I can dress up as a petrologist scientistbut won't fool anyone. Fun to speculate, though. Richard M - Original Message - From: Carl Agee a...@unm.edu To: meteoritelist meteoritelist meteorite-list@meteoritecentral.com; Jeff Grossman jngross...@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=4042491099560set=a.1076549432872.2012978.1200325441type=1ref=nf http://www.facebook.com/photo.php?fbid=4042494859654set=a.1076549432872.2012978.1200325441type=1ref=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: a...@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@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Sutter's Mill BSE - two more
My guess is a CR1 Michael On May 25, 2012, at 7:04 PM, Richard Montgomery 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 herenot 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 CAIswhat's your guess at this point?? Next Halloween I can dress up as a petrologist scientistbut won't fool anyone. Fun to speculate, though. Richard M - Original Message - From: Carl Agee a...@unm.edu To: meteoritelist meteoritelist meteorite-list@meteoritecentral.com; Jeff Grossman jngross...@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=4042491099560set=a.1076549432872.2012978.1200325441type=1ref=nf http://www.facebook.com/photo.php?fbid=4042494859654set=a.1076549432872.2012978.1200325441type=1ref=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: a...@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@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
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 rickm...@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 herenot 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 CAIswhat's your guess at this point?? Next Halloween I can dress up as a petrologist scientistbut won't fool anyone. Fun to speculate, though. Richard M - Original Message - From: Carl Agee a...@unm.edu To: meteoritelist meteoritelist meteorite-list@meteoritecentral.com; Jeff Grossman jngross...@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=4042491099560set=a.1076549432872.2012978.1200325441type=1ref=nf http://www.facebook.com/photo.php?fbid=4042494859654set=a.1076549432872.2012978.1200325441type=1ref=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: a...@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@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: a...@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@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Sutter's Mill BSE - two more
I just received two small chips this afternoon but haven't had a chance to look at them yet. But I have seen the images that Sasha Krot, Mike Zolensky and Carl Agee made. The rock is clearly a breccia. Sasha's chip has a CM2.0 clast surrounded by slightly less altered material, probably CM2.2. This is consistent with the presence of PCP which I believe I saw in some of Carl's images. The presence of CaS (oldhamite) and reduced phosphides reported by Mike Zolensky suggests that a projectile of an enstatite chondrite or aubrite impacted the host and then disrupted. There may have been subsequent mild metamorphism but little or no aqueous alteration of the host (or at least Mike Zolensky's piece) at that point; otherwise the oldhamite would have been destroyed. The rock has unique features, but other meteorite breccias contain clasts of diverse groups. Such rocks include Kaidun, Galim, Bencubbin, Almahata Sitta, even Murchison. Alan Quoting Carl Agee a...@unm.edu: 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 rickm...@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 herenot 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 CAIswhat's your guess at this point?? Next Halloween I can dress up as a petrologist scientistbut won't fool anyone. Fun to speculate, though. Richard M - Original Message - From: Carl Agee a...@unm.edu To: meteoritelist meteoritelist meteorite-list@meteoritecentral.com; Jeff Grossman jngross...@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=4042491099560set=a.1076549432872.2012978.1200325441type=1ref=nf http://www.facebook.com/photo.php?fbid=4042494859654set=a.1076549432872.2012978.1200325441type=1ref=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: a...@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@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: a...@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@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit
Re: [meteorite-list] Sutter's Mill BSE - two more
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 a...@unm.edu To: Richard Montgomery rickm...@earthlink.net Cc: meteoritelist meteoritelist meteorite-list@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 rickm...@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 herenot 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 CAIswhat's your guess at this point?? Next Halloween I can dress up as a petrologist scientistbut won't fool anyone. Fun to speculate, though. Richard M - Original Message - From: Carl Agee a...@unm.edu To: meteoritelist meteoritelist meteorite-list@meteoritecentral.com; Jeff Grossman jngross...@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=4042491099560set=a.1076549432872.2012978.1200325441type=1ref=nf http://www.facebook.com/photo.php?fbid=4042494859654set=a.1076549432872.2012978.1200325441type=1ref=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: a...@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@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: a...@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@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
