[meteorite-list] Is This All Olivine

From: Mark Miconi <mam602_at_meteoritecentral.com>
Date: Thu Apr 22 09:54:05 2004
Message-ID: <002701c1b681$d671c060$54b60344_at_ph.cox.net>

Wouldn't/isn't terrestrial Olivine called Peridot anyway?

Mark
----- Original Message -----
From: Dave Mouat <dmouat_at_dri.edu>
To: DiamondMeteor <DiamondMeteor_at_hotmail.com>
Cc: meteorite-list <meteorite-list_at_meteoritecentral.com>
Sent: Friday, February 15, 2002 10:42 AM
Subject: Re: [meteorite-list] Is This All Olivine


> Mohamed
> I'm not sure what you mean by the word "large" as in "Olivine is rarely
found in
> large sizes" but in ultramafic rock exposures (some classic localities in
Oman,
> by the way) we can find pure unserpentinized olivine in masses the size of
the
> Hoba meteorite (60 tons) and larger. We find entire mountains of
serpentinized
> to somewhat serpentinized olivine. So, the presence of olivine would not
be
> diagnostic of a meteoritic origin. Isotopic (and other chemical) analyses
would
> be diagnostic.
> Dave
>
> DiamondMeteor wrote:
>
> > Dear List;
> > I found few rocks that look all composed of Olivine,, and I have read
before
> > that Olivine is rarely found in large sizes. I have measured its
specific
> > gravity and found it to be around 3.3 (Olivine: 3.2), its hardness and
also
> > its color is close to Olivine.
> > Some rocks have very thin fusion crust.
> > Please have a look,, and I would be delighted to hear your openion.
> > http://pages.britishlibrary.net/mhy10/meteor/olv.htm
> >
> > Best Regards
> > Mohamed
> > ----------------------------------------------------------------------
> > http://pages.britishlibrary.net/mhy10/meteor/index.html
> > ===============================================
> > "As vision grows expression becomes difficult.", AnNiffari
> >
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Received on Fri 15 Feb 2002 07:35:29 PM PST