[meteorite-list] NEW LUNAR monzogabbro meteorite looks like aShergottite

From: Rob McCafferty <rob_mccafferty_at_meteoritecentral.com>
Date: Wed, 28 Feb 2007 15:03:27 -0800 (PST)
Message-ID: <484784.52250.qm_at_web50905.mail.yahoo.com>

Oh yeah...Not a particulary remarkable entry at that.
Since gabbro has been found in lunar meteorites, it's
not particularly surprising this stuff is either.

Atrange group the feldspars. So many names based on
how much anorthosite is in them as a proportion to
secondary minerals. Yipe. I'm glad I'm not a
geologist. If I had to be I'd pick the moon over the
earth any day.

Rob McC


--- Gerald Flaherty <grf2 at verizon.net> wrote:

> Google it. It's a n entry.
> Jerry Flaherty
> ----- Original Message -----
> From: "Rob McCafferty" <rob_mccafferty at yahoo.com>
> To: "gipometeorites" <carsten.giessler at t-online.de>;
>
> <meteorite-list at meteoritecentral.com>
> Sent: Wednesday, February 28, 2007 5:09 PM
> Subject: Re: [meteorite-list] NEW LUNAR monzogabbro
> meteorite looks like
> aShergottite
>
>
> >I am not going to claim any authority in the area
> of
> > geology but I will claim a good experience of
> > Anorthosite, a principle constituent of the lunar
> > surface. The Isle of Harris, the next island down
> from
> > me [is actually connected to my island, Lewis, by
> a
> > land bridge] has an entire mountain made from the
> > stuff, despite it's rare nature and I've collected
> > plenty of it to decorate my garden.
> > It weathers by ice and abrasion to the same
> gorgeous
> > white colour of the genesis rock brought back by
> the
> > Apollo 15 crew. This is not surprising since their
> > rock was weathered on the outside too, but that
> stone
> > was impact weathered only.
> >
> > Inside the rocks from harris they are remarkably
> > crystaline, quite grey in appearance and U took
> the
> > liberty of borrowing a lathe[?] to polish a small
> > section of a chunk i rather brutally chipped off
> with
> > a chisel. Apart from the colour, it looks very
> like a
> > piece of SAU008/005, a shergottite.
> >
> > In all honesty and with hindsight, it does not
> > surprise me that a lunar meteorite may well look
> like
> > a martian one.
> >
> > Anorthosite I believe, is a plutonic rock and
> since
> > most of the white part of the moon is made from
> it,
> > the only surpise to me, after thinking about it,
> is
> > that one that looks like a shergottite has not
> been
> > discovered before.
> >
> > I suggest that aeons of impacts on the moon do not
> > leave big enough chunks near the surface to
> preserve
> > the structure of the rock and that is why we
> haven't
> > seen one before. Having said that, we've only
> really
> > been looking for a few years.
> > Meteorites have, at least the potential to come
> from
> > deeper than the long weathered surface materials
> > brought back by the Apollo crews. This all makes
> sense
> > to me, if it is a confirmed discovery.
> >
> > In a differentiated body the size of the moon and
> > mars, I think, in retrospect, we should not be
> > surprised at all.
> >
> > Obviously, if this turns out to be a hoax, I
> absolve
> > myself of all I have said here on the grounds that
> I
> > have never heard of monzogabbro before. Gabbro is
> just
> > a feldspar with less than 60% or is it 40%[?]
> > anorthosite. What the frip does monzo mean? I
> thought
> > he was a character in the muppet show.
> >
> > Rob McC
> > {the man with a million tons of fake moon rock}
> >
> > --- gipometeorites <carsten.giessler at t-online.de>
> > wrote:
> >
> >> Hi List,
> >>
> >> Aziz Habibi asked me to forward a email from him
> to
> >> the list,
> >> so here it is:
> >>
> >> dear list,
> >>
> >> here is the first lunar monzogabbro!!, as you
> will
> >> read in the classification; it's also the first
> >> lunar to look like a shergotite.
> >>
> >> under microscope it's looking exactly like a
> >> shergotite from the texture..
> >>
> >> with all modesty this is one of the most
> important
> >> planetary meteorite.a very rare classification .
> >>
> >> enjoy photo in this link and here is the
> >> classification done by doctor Albert Jambon from
> >> upvi Paris.
> >>
> >> ..... yes a lunar with a"" Martian""shergtoite
> >> texture.????....
> >>
> >>
> >>
> >> go to this link and click on lunar album nwa
> 4683.
> >>
> >> http://photos.yahoo.com/azizhabibi....
> >>
> >>
> >>
> >> to understand how it's classified as monzogabbro
> >> check out this link.
> >>
> >>
> >
>
http://www.uwgb.edu/DutchS/PETROLGY/classification_of_igneous_rocks.htm.
> >>
> >> enjoy photo in this link and here is the
> >> classification done by doctor Albert Jambon from
> >> upvi Paris.
> >>
> >>
> >>
> >> there are other album including a new oriented
> >> Martian and a very fresh lodranites.
> >>
> >> all the best,
> >>
> >> aziz habibi
> >>
> >>
> >>
> >> Proposed Name NWA 4683
> >> Geographic Coordinates1
> >> undisclosed.
> >>
> >> Erfoud Morocco
> >>
> >> Find : october of 2006
> >>
> >> Major classification (group) Achondrite (Lunar
> >> monzogabbro)
> >>
> >>
> >>
> >> History: two pieces bought from nomads in Erfoud
> >> (Morocco).
> >>
> >> Physical characteristics: One stone broken in
> two
> >> pieces 68 and 409g. Dull black fusion crust on
> one
> >> side, weathered on the other side. It is a gray,
> >> coarse grained, pristine magmatic rock consisting
> of
> >> millimetric phenocrysts mainly of pyroxene and
> >> plagioclase.
> >>
> >>
> >>
> >> Petrography: A. Jambon, O. Boudouma and D.
> Badia.
> >> UPVI .
> >>
> >> The texture is best described as shergottitic
> like .
> >> Pyroxene are highly fractured while plagioclase
> >> laths, partly transformed to maskelynite, are
> only
> >> affected by a small number of fractures. Silica
> and
> >> silica-feldspar glass are minor components. A few
> >> impact melt patches underline the similarity with
> >> shergottites further. Ilmenite, baddeleyite,
> >> zirconolite, tranquilityite, pyrrhotite and
> metal.
> >> Fayalite associated with silica probably results
> >> from the dissociation of iron rich pyroxene.
> Minor
> >> terrestrial alteration.
>
=== message truncated ===



 
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Received on Wed 28 Feb 2007 06:03:27 PM PST