[meteorite-list] Ringwoodite in Sahara 98222 L6 breccia

From: drtanuki <drtanuki_at_meteoritecentral.com>
Date: Wed, 21 Jan 2009 20:01:23 -0800 (PST)
Message-ID: <922536.6437.qm_at_web53211.mail.re2.yahoo.com>

Hello,
  I found my records:
Sahara 98222 find L6 breccia with Ringwoodite in shock veins.

dirk ross...tokyo



--- On Thu, 1/22/09, drtanuki <drtanuki at yahoo.com> wrote:

> From: drtanuki <drtanuki at yahoo.com>
> Subject: Re: [meteorite-list] Ringwoodite
> To: "Mr EMan" <mstreman53 at yahoo.com>, meteorite-list at meteoritecentral.com, "Pete Pete" <rsvp321 at hotmail.com>
> Date: Thursday, January 22, 2009, 12:53 PM
> Dear Pete, Elton and List,
> I have several kilos of individual stones of the Sahara
> 98222?? with Ringwoodite (haven`t confirmed the # - from my
> memory- will have to check). I purchased them from the
> Labennes about 8-9 years ago. They are an L chondrite. If
> you require more information I will locate it. Best, Dirk
> Ross...Tokyo
>
>
> --- On Thu, 1/22/09, Mr EMan <mstreman53 at yahoo.com>
> wrote:
>
> > From: Mr EMan <mstreman53 at yahoo.com>
> > Subject: Re: [meteorite-list] Ringwoodite
> > To: "Pete Pete" <rsvp321 at hotmail.com>,
> "metlist"
> <meteorite-list at meteoritecentral.com>
> > Date: Thursday, January 22, 2009, 12:41 PM
> > Hello Pete: Off the top of my head -- I don't
> recall
> > ever hearing of "indigo" blue in a
> meteorite. I
> > do know that ringwoodite is barely translucent with a
> pale
> > purple-over-brown tint especially visible to the eye
> under a
> > low power loupe. Perhaps it is just semantics.
> >
> > When the list last visited ringwoodite veins, I
> believe
> > they were almost always found in L chondrites but this
> could
> > have been from paired finds. I say this suggesting
> that the
> > bulk of ringwoodite veins observed/sampled on earth
> might
> > have come from the same disrupted parent body-- but
> have
> > nothing other than vignette evidence to support it.
> >
> > I believe your discovery is about right regarding
> > ringwoodite abundance. I have seen swellings of
> ringwoodite
> > veins to about 3-5mm but 1mm is normal. Ringwoodite
> veins
> > are likely injection veins along existing
> fractures/lines of
> > weakness. The purity of the veins does not suggest the
> veins
> > occur as flash melts.
> >
> > About 8 years ago there was a run of ringwoodite
> bearing
> > slices being sold but I believe it came from a larger
> find
> > of multiple stones--Sorry I don't have the NWA
> numbers.
> >
> > Please send a photo when /if you can.
> >
> > Elton
> >
> >
> > --- On Wed, 1/21/09, Pete Pete
> <rsvp321 at hotmail.com>
> > wrote:
> >
> > > From: Pete Pete <rsvp321 at hotmail.com>
> > > Subject: [meteorite-list] Ringwoodite
> > > To: "meteoritelist meteoritelist"
> > <meteorite-list at meteoritecentral.com>
> > > Date: Wednesday, January 21, 2009, 6:12 PM
> > > Greetings, all,
> > >
> > >
> > > In the experience of the chondrite-cutters, how
> common
> > are
> > > you finding ringwoodite in shock melt veins?
> > >
> > > Personally, I've only seen (what I believe to
> be)
> > > ringwoodite in two stones out of the dozens
> I've
> > cut.
> > >
> > > How about size? In mine, the largest area is ~ .5
> mm.
> > >
> > > For such an outstanding indigo blue colour in a
> > generally
> > > brown matrix, I'm surprised there isn't
> that
> > much
> > > information about the mineral in meteorites on
> the
> > internet
> > > or my books.
> > >
> > > Cheers,
> > > Pete
> > >
> >
> > ______________________________________________
> > http://www.meteoritecentral.com
> > Meteorite-list mailing list
> > Meteorite-list at meteoritecentral.com
> >
> http://six.pairlist.net/mailman/listinfo/meteorite-list
> ______________________________________________
> http://www.meteoritecentral.com
> Meteorite-list mailing list
> Meteorite-list at meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
Received on Wed 21 Jan 2009 11:01:23 PM PST