[meteorite-list] Private vs. Institutional Curation (was - Sutter's Mill Meteorite Preserved For Present and Future Scientists)

From: Galactic Stone & Ironworks <meteoritemike_at_meteoritecentral.com>
Date: Wed, 21 Aug 2013 13:23:49 -0400
Message-ID: <CAKBPJW8i-B5J0DdDGxGEWp2FUdcdHNgZCfdOy+WTyfxui=3Vmg_at_mail.gmail.com>

Hi List,

I have a question for the "advanced" collectors -

How well do you curate your own collections? Are there any
privately-held collections who exercise similar environmental and
handling controls as the major scientific institutions?

Obviously, I doubt your average Joe has a pressurized clean-room like
JSC does, but are there any private collections that are known for
being "scientifically-viable" ?

What level of curation would be required to achieve a level of
preservation that science would find useful for research?

1) controlled environment storage - free of contaminants. Sealed
hermetic containers kept inside a climate-controlled area that has
positive pressure to the surrounding access. Ideally, this area
should be sealed from the rest of the building and any atmosphere
going in should be micro-filtered and monitored.

2) controlled handling - sterile handling area that meets the
conditions stated above for storage. No magnets or other types of
non-physical contamination.

3) extensive documentation of provenance and logged/recorded instances
of handling. Any cuts, samples, or portions removed are carefully
plotted and logged.

To be fair, most universities don't go through the whole JSC "space
suit" routine when curating their specimens. So, how much is needed
for a scientific institution to feel confident that a specimen from a
given private collector would be viable for scientific research?

Best regards,

MikeG

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On 8/21/13, Ron Baalke <baalke at zagami.jpl.nasa.gov> wrote:
>
>
> http://carsonnow.org/story/08/21/2013/rare-meteorite-preserved-present-and-future-scientists
>
> Rare meteorite preserved for present and future scientists
> by Jeff Munson
> Carson Now
> August 21, 2013
>
> The main mass of a rare meteorite observed in the skies over Carson City,
> Carson Valley and Lake Tahoe that exploded over California's Sierra
> foothills
> in April 2012 will be preserved for current and future scientific
> discoveries,
> thanks to the collaborative efforts of five U.S. academic institutions.
>
> It has found a permanent home divided among the University of California,
> Davis; the Smithsonian Institution's National Museum of Natural History
> in Washington, D.C.; American Museum of Natural History in New York City;
> The Field Museum of Natural History in Chicago; and Arizona State University
>
> in Tempe. Together, the institutions have successfully acquired the biggest
>
> known portion of the Sutter's Mill meteorite.
>
> The meteorite is considered to be one of the rarest types to hit the Earth
> -- a carbonaceous chondrite containing cosmic dust and presolar materials
> that helped form the planets of the solar system.
>
> Its acquisition signifies enhanced research opportunities for each
> institution
> and ensures that future scientists can study the meteorite for years to
> come.
>
> "With these museums and institutions storing the meteorite's main mass,
> it leaves it in a pristine condition to preserve for future generations
> to study," said UC Davis geology professor Qing-zhu Yin. "Fifty or 100
> years from now, we may have new technology that will enable later
> generations
> to revisit the meteorite and do research we haven't thought of. This gives
> us a better chance to realize the full scientific value of the meteorite,
> rather than have it be just a collector's item."
>
> The meteorite formed about 4.5 billion years ago. While it fell to Earth
> roughly the size of a minivan before exploding as a fireball, less than
> 950 grams have been found. Its main mass weighs just 205 grams (less than
> half a pound) and is about the size of a human palm.
>
> The main mass was X-rayed by CT scan at the UC Davis Center for Molecular
> and Genomic Imaging. This was the first time a meteorite acquisition was
> CT scanned before its division among a consortium of institutes, allowing
> prior knowledge of each piece's contents. Then it was cut into five
> portions,
> reflective of each institution's investment, before being delivered to
> the institutions.
>
> The portion of the main mass acquired by each institution includes:
>
> * American Museum of Natural History: 34 percent
> * Smithsonian Institution's National Museum of Natural History: 32 percent
> * The Field Museum of Natural History: 16 percent
> * Arizona State University: 13 percent
> * UC Davis: 5 percent
>
> When the meteorite landed near Sutter's Mill, the gold discovery site
> that sparked the California Gold Rush, it spurred a scientific gold rush
> of sorts, with researchers, collectors and interested citizens scouring
> the landscape for fragments of meteorite. The institutions that have
> acquired
> the main mass were among those that acted on this rare scientific
> opportunity
> to gain insights about the origins of life and the formation of the
> planets.
>
> At UC Davis, for instance, the meteorite fell just 60 miles east of the
> main campus. Yin immediately traveled to the site with students and
> colleagues,
> looking for specimens and reaching out to the public to provide meteorite
> donations for science. He confirmed for the original discoverer of the
> main mass that it was carbonaceous chondrite. Yin and his UC Davis
> colleagues
> have also X-rayed the meteorite and determined its age and chemical
> composition.
>
> "It just happened in our backyard,' said Yin. "I felt obligated to do
> something, and I still do."
>
> Involvement from the other institutions included:
>
> * The American Museum of Natural History worked closely with Yin to secure
> specimens of the Sutter's Mill meteorite right after its fall, and performed
>
> nondestructive computed tomography (CT) scans of several specimens kindly
> loaned by their finders. These scans were used to determine the density
> of several samples to very high accuracy, confirming the type of meteorite
> represented by Sutter's Mill.
>
> * The Field Museum of Natural History found several presolar stardust
> grains in two smaller pieces of the meteorite donated by private collector
> Terry Boudreaux. Presolar stardust grains are the oldest solid samples
> available to any lab and are essentially time capsules from before the
> solar system formed 4.6 billion years ago.
>
> * Arizona State University's Meenakshi Wadhwa, director of the Center
> for Meteorite Studies, was contacted by Robert Haag, the private collector
> who owned the main mass. She then contacted the other institutions to
> initiate its joint acquisition.
>
> * The Smithsonian Institution cut the mass into five portions.
>
> Last spring, UC Davis alumnus Gregory Jorgensen and donor Sandy VanderPol
> provided nearly 3 grams of the Sutter's Mill meteorite to Yin's lab at
> UC Davis. Those 3 grams allowed UC Davis to learn the meteorite's age
> and chemical composition. The university's recent acquisition of another
> 10 grams of the main mass will allow for even further research, including
> searching for presolar grains and performing isotopic analysis.
>
> UC Davis' section of the meteorite was funded by a portion of Yin's
> Chancellor's
> Fellowship.
>
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Received on Wed 21 Aug 2013 01:23:49 PM PDT