[meteorite-list] [Announced June 8, 2010] NWA 5400: Earth-Related Meteorite

From: Greg Hupe <gmhupe_at_meteoritecentral.com>
Date: Wed, 29 Sep 2010 01:08:58 -0400
Message-ID: <D09398494F914C968898EDB700FD676D_at_greg323a964987>

Shawn and Others:

Since some people did not read or forgot what I wrote in my very first
announcement of NWA 5400 on June 8, 2010, here it is to review. You will
notice in the second abstract dated 2010 that the Cosmic Ray Exposure date
HAS been determined. Now how scientists compile that data with other
information is for them to study, ponder and write new abstracts.

June 8, 2010 [Meteorite Central List]
> Dear List Members,
>
> I would like to announce an important new meteorite that has been under
> intense analysis over the last two years by a select group of scientists
> from around the world...
>
> NWA 5400: Earth-Related Ungrouped Meteorite
>
> Northwest Africa 5400 may be a sample from a large asteroid or dwarf
> planet,
> which accreted in the early solar nebula in the vicinity of proto-Earth or
> Theia. NWA 5400 has oxygen isotope ratios indistinguishable from those of
> rocks from the Earth and the Moon, which plot on the TFL (Terrestrial
> Fractionation Line). A precise formation age has not yet been measured,
> but
> it cannot be older than 4.54 billion years, which likely makes NWA 5400
> anomalously young among primitive achondritic objects from the early Solar
> System. It is generally accepted that the Earth-Moon system was created
> when
> Theia collided with proto-Earth about 4.3 billion years ago. Is it
> possible
> that NWA 5400 is somehow related to this phenomenal event?
>
> NWA 5400 adds valuable understanding of events that took place in the
> early
> evolution period of the Solar System. After two years of intense analysis,
> scientists at prominent institutions from around the world continue to
> diligently study this 'stand-alone' meteorite, which will add to the
> already
> incredible information NWA 5400 has to offer.
>
> Link to 2009 LPSC abstract on NWA 5400:
> http://www.lpi.usra.edu/meetings/lpsc2009/pdf/2332.pdf
>
> Link to 2010 LPSC abstract on NWA 5400:
> http://www.lpi.usra.edu/meetings/lpsc2010/pdf/1492.pdf
>
> NWA 5400 has a Total Known Weight of 4.818 kg in a single stone that was
> discovered in Northwest Africa in 2008. The chocolate-brown mottled matrix
> takes an extremely nice polish, which reveals the dazzling olivine
> crystals
> exhibited in this scientifically important new meteorite!
>
> Cross-polarized light optical thin section image of NWA 5400 (width of
> field
> = 1.2mm):
> http://www.lunarrock.com/NWA5400/nwa5400xpl.jpg
>
> Image of 58.9-gram complete slice with hologram-like olivine crystals that
> dance across the polished surface when tilted from side to side:
> http://www.lunarrock.com/NWA5400/nwa5400slice.jpg
>
> Best regards,
> Greg
>
> ====================
> Greg Hupe
> The Hupe Collection
> NaturesVault (eBay)
> gmhupe at htn.net
> www.LunarRock.com
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Received on Wed 29 Sep 2010 01:08:58 AM PDT