NWA 13867 CO3 Carbonaceous Chondrite Ornans type Meteorite 7.6 gram end cut

Description

NORTH WEST AFRICA 13867
CO3 CARBONACEOUS ORNANS TYPE
PRIMITIVE CHONDRITE METEORITE
7.6  GRAM END CUT
THIS METEORITE SLICE HAS MANY TINY CHONDRULES AND CAI INCLUSIONS.
IT HAS BEEN POLISHED ON ONE SIDE.
OFFICIAL CLASSIFICATION DATA SOURCE:
The Meteoritical Society
International Society for Meteoritics and Planetary Science
Lunar and Planetary Institute
Meteoritical Bulletin Database
Northwest Africa 13867
Basic information
Name:
Northwest Africa 13867
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 13867
Observed fall:
No
Year found:
2020
Country:
(Northwest Africa)
Mass:
519 g
Classification
history:
Recommended:
CO3
This is 1 of 612 approved meteorites (plus 1 unapproved name) classified as CO3.
Comments:
Approved 20 Dec 2021
Writeup
Writeup from MB 110:
Northwest Africa 13867
(NWA 13867)
(Northwest Africa)
Purchased: 2020 May
Classification: Carbonaceous chondrite (CO3)
History
: Purchased by John Higgins in May, 2020 from a dealer in Adrar, Algeria.
Petrography
: (A. Irving,
UWS
and P. Carpenter,
WUSL
) Very small chondrules (apparent diameter 210±150 µm, N = 22), mineral fragments and very fine grained CAI are set in a very dark matrix (~20 vol.%, deep reddish-brown to almost opaque in thin section) containing kamacite, taenite, troilite, pentlandite and minor secondary Ca sulfate. One studied CAI consists of perovskite, gehlenite, aluminous diopside, hibonite and orthopyroxene in a grossite matrix. There is also magnetite present
Geochemistry
: Olivine Fa
16.8±15.0
, range Fa
0.2-36.9
, N=5. Cr
2
O
3
in ferroan olivine 0.13-0.27 wt.% (N=5), low-Ca pyroxene (Fs
19.7±24.9
Wo
2.8±2.3
, range Fs
1.0-54.5
Wo
0.6-5.8
, N = 4), diopside (Fs
1.5
Wo
35.6
; Fs
0.4
Wo
52.0
; N = 2), plagioclase (An
62.0
Or
0.1
; An
95.9
Or
0.1
; N = 2).
Classification
: Carbonaceous chondrite (CO3).
Specimens
: 25.2 g including one polished thin section at
UWB
; remainder with Mr. J. Higgins.
Data from:
MB110
Table 0
Line 0:
Place of purchase:
Adrar, Algeria
Date:
P 2020 May
Mass (g):
519
Pieces:
18
Class:
CO3
Shock stage:
S2
Weathering grade:
low
Fayalite (mol%):
16.8±15.0 (n=5)
Ferrosilite (mol%):
19.7±24.9
Wollastonite (mol%):
2.8±2.3
Classifier:
A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):
25.2
Type spec location:
UWB
Main mass:
J. Higgins
Comments:
Work name JH20-8; submitted by A. Irving
Institutions
and collections
UWS
: University of Washington, Department of Earth and Space Sciences
WUSL
: Washington Univ. St. Louis
UWB
: University of Washington Seattle
Catalogs:
References:
Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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, EXTENSIVELY POLISH 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 OF TONY IRVING AND PAUL CARPENTER.
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.
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