[meteorite-list] Kalahari Lunars

From: Raremeteorites <raremeteorites_at_meteoritecentral.com>
Date: Wed, 8 Jun 2016 11:34:32 -0700
Message-ID: <5D656CA90AD14DB88A9E6A1EF8F207A8_at_HPDESKTOP>

Interesting, could long-term terrestrial cosmic ray exposure account for
these "seemingly impossibly" short transit times:

http://www.lpi.usra.edu/meetings/metsoc2005/pdf/5270.pdf

I noticed in this abstract that K. Nishiizumi, whom I have a great deal of
respect for, states the following:

The cosmogenic nuclide concentrations in Kalahari 008 and 009 are the lowest
activities in stony meteorites ever measured.

If both objects are lunar meteorites, the transition time from the Moon to
the earth was 230?90 yr and ejection depth was more than >1,100 g/cm2 on the
Moon. Small amounts of cosmogenic nuclides are also produced in-situ on the
Earth?s surface.



----- Original Message -----
From: "Carl Agee" <agee at unm.edu>
To: "Raremeteorites" <raremeteorites at centurylink.net>
Cc: "meteoritelist meteoritelist" <meteorite-list at meteoritecentral.com>
Sent: Wednesday, June 08, 2016 10:59 AM
Subject: Re: [meteorite-list] Kalahari Lunars


According to the MetBull there are 20 gram samples and thin sections
of both 008 and 009 at Universit?t M?nster, M?nster, Germany. There
has been science done on Kalahari 008 and 009. Aside from microprobe,
they have radiometric ages, oxygen isotopes, as well as cosmic ray
exposure. As Randy Korotev notes, they are totally different rocks but
with similar lunar ejection ages - only 350 ? 120 yr for Kalahari 008
and 220 ? 40 yr for Kalahari 009, which are the shortest exposure ages
of any meteorite.

Carl
*************************************
Carl B. Agee
President, Consortium for Materials Properties Research in Earth
Sciences (COMPRES)
Director and Curator, Institute of Meteoritics
Professor, Earth and Planetary Sciences
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126

Tel: (505) 750-7172
Fax: (505) 277-3577
Email: agee at unm.edu
http://meteorite.unm.edu/people/carl_agee/
http://compres.us/about-us/compres-president



On Wed, Jun 8, 2016 at 11:44 AM, Raremeteorites via Meteorite-list
<meteorite-list at meteoritecentral.com> wrote:
> In other words, they are worthless from a monetary standpoint just like
> meteorites found on public lands here in the United States and many other
> countries.
>
> The best that could be hoped for, if they still or ever existed, is that
> they are made available for scientific research from the government that
> owns them.
>
> Adam
>
>
>
> ----- Original Message ----- From: "Chauncey Walden via Meteorite-list"
> <meteorite-list at meteoritecentral.com>
> To: <meteorite-list at meteoritecentral.com>
> Sent: Wednesday, June 08, 2016 8:58 AM
> Subject: [meteorite-list] Kalahari Lunars
>
>
>
>> There remains the fact that if any of this material actually appears in
>> the market it would immediately be claimed by the government of Botswana.
>> Their President has a keen interest in meteorites. That being said, the
>> last
>> time I was in the Central Kalahari on photographic safari I definitely
>> kept
>> an eye out for rocks. The White Kalahari has hundreds of feet of sand
>> with
>> organics but rocks are rare.
>> Chauncey
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Received on Wed 08 Jun 2016 02:34:32 PM PDT