[meteorite-list] Official Announcement NWA 6077 is Paired with NWA 5400

From: cdtucson at cox.net <*cdtucson_at_meteoritecentral.com*> Date: Tue, 5 Oct 2010 13:52:04 -0400 Message-ID: <20101005135204.8YROF.1151870.imail_at_fed1rmwml34> · cdtucson_at_meteoritecentral.com

--
Carl or Debbie Esparza
Meteoritemax
---- cdtucson at cox.net wrote: 
> The following is a list of the official pairings and approximate TKW so far for this amazing Brachinite-like meteorite
> 
> NWA 5400.   4280. grams
> NWA 6292.    725. grams.
> NWA 6077.   1000. grams
> NWA 5363     7985. grams.
> 
> Total.           13,990. grams. 
> 
> 
> --
> Carl or Debbie Esparza
> Meteoritemax
> 
> 
> ---- John higgins <geohiggins at yahoo.com> wrote: 
> > Greg Catterton, 
> > 
> > I would be very cautious with throwing loose words around "like considering all 
> > the pairings"
> > As far as I know NWA 6077 is the only whole stone other than NWA 6292 of which 
> > is very fragmented that has conclusively been paired through testing and 
> > subsequent testing to NWA 5400, from what I understand most of the others are 
> > purely conjecture, or speculative without the extensive testing completed or in 
> > various stages of testing...
> > I think our focus should be on the Science and authenticity of claims before you 
> > start making bets and psychic predictions about how much more material is paired 
> > to this very special and important meteorite. 
> > 
> > 
> > Regardless of what you think, and however hard you try to knock this meteorite 
> > for TKW, of what may or may not come to fruition, this meteorite is priceless to 
> > Science. I don't understand what the focus on TKW boils down to other than 
> > monetary value or jealousy, this meteorite truly transcends price. And I think 
> > the focus should be on the science of what this meteorite can teach us about our 
> > past. And possibly give us clues to the future. NWA 6077 is a Meteorite that has 
> > most likely come from the mantle of a planet, which one? The Oxygen Isotope 
> > results suggest one like our own planet Earth. Even if there are 10kg or more, 
> > this meteorite is from the mantle of a planet that is similar to our own and 
> > comes from a place in time that does not exist anymore. I hope we can, as a 
> > community become more productive with our time and focus on figuring out what 
> > the meteorite parent body is and what the conditions are that existed when it 
> > materialized. I suggest we shift the emphasis to the scientific study rather 
> > than putting such a great focus on prematurely rushing TKW statistics, that can 
> > only be revealed only after many more years of scientific studies.
> > 
> > Regards,
> > John Higgins
> > IMCA# 9822
> > 
> > 
> > 
> > ----- Original Message ----
> > From: Greg Catterton <star_wars_collector at yahoo.com>
> > To: meteorite-list at meteoritecentral.com; John higgins <geohiggins at yahoo.com>
> > Sent: Tue, October 5, 2010 12:01:35 PM
> > Subject: Re: [meteorite-list] Official Announcement NWA 6077 is Paired with NWA 
> > 5400
> > 
> > Its great that there is such a nice amount of this material when considering all 
> > the pairings... With over 10kg of this material in pairings known so far, I am 
> > willing to bet there is likely a good amount more still.
> > I bet the Brachinties are coming out of the woodwork to be tested.
> > 
> > Greg Catterton
> > www.wanderingstarmeteorites.com
> > IMCA member 4682
> > On Ebay: http://stores.shop.ebay.com/wanderingstarmeteorites
> > On Facebook: http://www.facebook.com/WanderingStarMeteorites
> > 
> > 
> > --- On Tue, 10/5/10, John higgins <geohiggins at yahoo.com> wrote:
> > 
> > > From: John higgins <geohiggins at yahoo.com>
> > > Subject: [meteorite-list] Official Announcement NWA 6077 is Paired with NWA 
> > >5400
> > > To: meteorite-list at meteoritecentral.com
> > > Date: Tuesday, October 5, 2010, 9:26 AM
> > > Official Announcement
> > >  
> > > NWA 6077 IS PAIRED WITH NWA 5400
> > >  
> > > North West Africa 6077 Description:
> > > An olivine-rich assemblage with cumulate (or possibly
> > > metamorphic) texture 
> > > exhibiting triple junction grain boundaries. Olivine
> > > (Fa30.2-30.7), 
> > > orthopyroxene (Fs24.1-24.5Wo2.1-2.0), clinopyroxene
> > > (Fs9.4-10.0Wo44.0-43.5), 
> > > altered kamacite, chromite, chlorapatite, Ni-bearing
> > > troilite and/or pyrrhotite. 
> > > No plagioclase was found. Analysis conducted at the
> > > Carnegie Institution of 
> > > Washington show that the oxygen isotopic composition of
> > > this specimen plots on 
> > > the Terrestrial Fractionation Line. In conjunction with the
> > > mineral compositions 
> > > and texture, this establishes that NWA 6077 is paired with
> > > NWA 5400.
> > >  
> > > The averages of the two Oxygen Isotope Results are: 
> > > d17O = 2.780, d18O = 5.358, D17O = -0.019 (all in per mil)
> > >  
> > > This brachinite was recovered out of Morocco in 2008 as
> > > one whole stone and 
> > > purchased by John Higgins. It was submitted for
> > > classification to Dr. Tony 
> > > Irving and was given the provisional classification number
> > > of NWA 6077. This 
> > > meteorite has a modest TKW of less than 1000g after the
> > > type specimen was 
> > > removed.
> > >  
> > > Personal Notes: Although I suspected that the two were
> > > possibly paired due to 
> > > similarities in visual observations and classification
> > > compositions, I felt it 
> > > was important to wait for secondary Oxygen Isotope results
> > > to come in which have 
> > > recently confirmed the results beyond a reasonable doubt.
> > > There was also another 
> > > important factor besides Oxygen Isotope testing that had
> > > to be taken into 
> > > account. Orthopyroxene which is present in NWA 5400 was
> > > missed the first time 
> > > around in NWA 6077 because it looks identical to
> > > clinopyroxene in back-scattered 
> > > electron images. However further in-depth
> > > microprobe studies of the thin section 
> > > have confirmed the presence of orthopyroxene, and are
> > > now noted in the updated 
> > > description. I feel that making a self pairing based upon
> > > my own 
> > > visual observations, is not only unethical, inappropriate,
> > > and akin to pirating, 
> > > but would only feed the controversies regarding this
> > > meteorite without the 
> > > scientific testing data to back up such speculation, such
> > > action would be 
> > > premature, immoral and unfair to Greg Hupe and NWA 5400
> > > after all the time and 
> > > effort he put into the study of what has become one of the
> > > most important 
> > > meteorite finds in history.
> > >  
> > > Have a Great Day!
> > > John Higgins
> > > IMCA#9822
> > > 
> > > 
> > >       
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> > > 
> > 
> > 
> >       
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