IMB NWA 13475 L5 Chondrite Melt Breccia Meteorite 50.8 gram end cut

Description

NORTHWEST AFRICA 13475
L5 MELT BRECCIA CHONDRITE METEORITE
50.8 GRAM END CUT
INTRODUCING
A NEW METEORITE
A BEAUTIFUL MELT BRECCIA METEORITE THAT IS FRESH AND HEAVILY SHOCKED WITH SPIDERWEB MELT LINES CRISS-CROSSING EACH OTHER
THERE ARE VISIBLE METAL SPECKS AND CHONDRULES ARE EASY TO IDENTIFY IN THIS SLICE
THIS METEORITE IS HIGHLY RECRYSTALLIZED GIVING IT A BEAUTIFUL
APPEARANCE ALSO MAKING THE MATRIX HARD AND COMPACTED
OFFICIAL CLASSIFICATION DATA SOURCE:
The Meteoritical Society
International Society for Meteoritics and Planetary Science
Lunar and Planetary Institute
Meteoritical Bulletin Database
Northwest Africa 13475
Basic information
Name:
Northwest Africa 13475
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 13475
Observed fall:
No
Year found:
2019
Country:
(Northwest Africa)
Mass:
8.44 kg
Classification
history:
Recommended:
L5-melt breccia
[explanation]
This is 1 of 24 approved meteorites classified as L5-melt breccia.
[show all]
Search for other:
L chondrites
,
L chondrites (type 4-7)
,
Melted chondrites
,
Ordinary chondrites
, and
Ordinary chondrites (type 4-7)
Comments:
Approved 11 Nov 2020
Writeup
Writeup from MB 109:
Northwest Africa 13475
(NWA 13475)
(Northwest Africa)
Purchased: 2019 May
Classification: Ordinary chondrite (L5, melt breccia)
History
: Purchased by John Higgins in May 2019 from a Mauritanian dealer.
Petrography
: (A. Irving,
UWS
and P. Carpenter,
WUSL
) Breccia consisting of equilibrated Type 5 clasts (largely recrystallized with sparse chondrules) set in a sparse fine grained matrix (~10 vol.%), portions of which exhibit melt textures (notably tiny sulfide-metal composite spherules). Accessory phases include albitic plagioclase, troilite, kamacite, taenite, low-Ti chromite and merrillite.
Geochemistry
: Olivine (Fa
24.7±0.5
, range Fa
23.9-25.2
, N = 5), low-Ca pyroxene (Fs
21.1±0.21
Wo
1.5±0.3
, range Fs
21.0-21.3
Wo
1.0-1.7
, N = 5), clinopyroxene (Fs
8.8±2.3
Wo
44.3±1.6
, range Fs
6.9-8.2
Wo
44.5-45.8
, N = 2).
Classification
: Ordinary chondrite (L5 melt breccia).
Specimens
: 164 g including one polished thin section at
UWB
; remainder with Mr.J. Higgins.
Data from:
MB109
Table 0
Line 0:
Place of purchase:
Mauritania
Date:
P 2019 May
Mass (g):
8438
Pieces:
5
Class:
L5-melt breccia
Shock stage:
S2 clast
Weathering grade:
W1
Fayalite (mol%):
24.7±0.5
Ferrosilite (mol%):
21.1±0.1
Wollastonite (mol%):
1.5±0.3
Classifier:
A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):
164
Type spec location:
UWB
Main mass:
J. Higgins
Comments:
JH20-6; submitted by A. Irving
Institutions
and collections
UWS
: University of Washington, Department of Earth and Space Sciences,
WUSL
: Washington Univ.,
UWB
: University of Washington,
References:
Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Geography:
Coordinates:
Unknown.
IMCA ( INTERNATIONAL METEORITE COLLECTORS ASSOCIATION )
I AM MEMBER # 9822  JOHN HIGGINS. THIS METEORITE IS FROM MY PERSONAL COLLECTION. I AM THE MAIN MASS HOLDER WITH NO BREAKS IN THE CHAIN OF PROVENANCE. MY NAME MATCHES THE ONE LISTED IN THE METEORITICAL SOCIETY BULLETIN OF WHICH I AM A LONGTIME MEMBER IN GOOD STANDING. I HAVE GONE THROUGH GREAT LENGTHS TO PERSONALLY PROCURE, CURATE, CUT AND PRESENT THIS METEORITE. THIS OFFICIALLY CLASSIFIED HIGH QUALITY METEORITE  HAS CONTRIBUTED TO THE SCIENCE OF METEORITICS THROUGH RESEARCH LED BY  THE WORLD RENOWN TEAM AT THE UNIVERSITY OF WASHINGTON, SEATTLE.
GUARANTEED AUTHENTICITY
Member of the Meteoritical Society & International Meteorite Collectors Association The authenticity of this meteorite has a 100% guarantee.
Signed Certificate of Authenticity Included
. First class delivery and provenance provided exhibiting important details of the classification & petrography.
1cm scale cube for reference purposes not included.
SHIPPING: Shipping and Delivery
Includes postage costs, packaging & handling. International shipping may be subject to import duties or other taxes. I normally dispatch your order the following day after payment is completed (Mon-Sat).Your goods will be shipped from USA, if you live outside US, the Items normally take 7-14 days but please allow up to 20 days for delivery in case of postal delays.
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