[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 13:36:42 -0400 Message-ID: <20101005133642.DZMLA.1151548.imail_at_fed1rmwml34> · cdtucson_at_meteoritecentral.com

--
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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