ANOMALOUS BRECCIA EUCRITE
On offer 1 specimen of 28 grams.
There are only 10 meteorites classified & approved as an Anomalous breccia eucrite & this is one of them.
This is an extremely rare meteorite NWA12445
This unique meteorite is officially classified & approved as NWA 12445 and was recently discovered & purchased in Algeria in Aug 2018 & classified by world renowned and profoundly respected Dr Anthony J. Irving and team at University of Washington.
Name: Northwest Africa 12445 this is an official meteorite name
ANOMALOUS BRECCIA EUCRITE THIS IS EXTREMELY RARE METEORITE.
The authenticity of this meteorite has a 100% guarantee. Signed Certificate of Authenticity Included
First express class delivery and provenance provided.
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This Items will not include any reference, and will be posted as a "Gift" for Customs purposes
TRULY A BEAUTIFUL MUSEUM QUALITY SHOWPIECE
FRESH FUSION CRUST WITH VELVETY TEXTURE AND TONS OF CONTRACTION CRACKS
OFFICIAL CLASSIFICATION DATA SOURCE:
THE METEORITICAL SOCIETY
INTERNATIONAL SOCIETY FOR METEORITICS AND PLANETARY SCIENCE
LUNAR AND PLANETARY INSTITUTE
METEORITICAL BULLETIN DATABASE:
Northwest Africa 12445
Basic information Name: Northwest Africa 12445
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12445
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 797 g
This is 1 of 10 approved meteorites classified as Eucrite-an
Comments: Approved 21 Mar 2020
Writeup from MB 109:
Northwest Africa 12445 (NWA 12445)
Purchased: 2018 Aug
Classification: HED achondrite (Eucrite, anomalous)
History: A total of 21 similar stones (total 797 g) were recovered ~70 m apart at a location in Algeria, and were purchased by Mbark Arjdal in August 2018 from an Algerian dealer.
Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of some lithic eucrite clasts plus a lot of related, angular crystalline debris in a finer grained matrix. Lithic clasts have microgabbroic to subophitic textures. Minerals are exsolved pigeonite (pale orange in thin section), anorthite (exhibiting undulose extinction), silica polymorph, fayalite, ilmenite, troilite and minor Ni-free metal.
Geochemistry: Low-Ca pyroxene host (Fs67.7±1.6Wo3.1±1.3, range Fs66.0-70.6Wo1.7-5.3, FeO/MnO = 29-31, N = 6; Fs59.7Wo2.4, FeO/MnO = 28), high-Ca pyroxene exsolution lamellae (Fs32.1±2.0Wo42.8±0.7, range 29.2-34.4Wo42.0-43.7, FeO/MnO = 30-33, N = 6; Fs24.7-25.9Wo44.5-42.9, FeO/MnO = 29-30, N = 2), fayalitic olivine (Fa73.8±6.5, range Fa69.3-78.4, FeO/MnO = 46, N = 2), anorthite (An91.9-93.3Or0.6-0.3, N = 2).
Classification: Eucrite (breccia, anomalous). The predominance of highly ferroan low-Ca and high-Ca pyroxenes in this specimen is an anomalous feature; these now-exsolved highly ferroan pigeonites are reminiscent of similar pyroxenes in anomalous ferroan eucrite NWA 11729.
Place of purchase: Algeria
Date: P 2018 Aug
Mass (g): 797
Shock stage: moderate
Weathering grade: low
Fayalite (mol%): 73.8±6.5 (N=2)
Ferrosilite (mol%): 67.7±1.6 (n=6)
Wollastonite (mol%): 3.1±1.3
Classifier: A. Irving and S. Kuehner, UWS
Type spec mass (g): 38.2
Type spec location: UWB
Comments: Work name Arj18-A10; submitted by A. Irving
and collections UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS: NASA ADS
Find references in Google Scholar: Google Scholar
Public domain photographs:
A. Irving Added to database 12 Mar 2020
- Main Mineral/ Name Meteorite
- EXTREMELY RARE ANOMALOUS BRECCIA EUCRITE
- Mineral Form/ Type Meteorite
- Achondrite Meteorite
- OFFICIALLY CLASSIFIED & APPROVED FROM OUTER SPACE
- 28 g
- Origin (Country)