NWA 13509 LL4-6 Chondrite Breccia Meteorite with lithic clasts 5g part slice

Description

NORTHWEST AFRICA 13509
LL4-6 CHONDRITE METEORITE
5 GRAM PART SLICE
THE MATRIX IS FILLED WITH BRECCIA OF TYPE 6 LITHIC CLASTS THAT TRANSITION FROM DARK GREY TO LIGHT GREY TO LEATHER BROWN
CHONDRULES ARE NOT EASY TO IDENTIFY
THIS METEORITE IS HIGHLY RECRYSTALLIZED GIVING IT A BEAUTIFUL
APPEARANCE
OFFICIAL CLASSIFICATION DATA SOURCE:
The Meteoritical Society
International Society for Meteoritics and Planetary Science
Lunar and Planetary Institute
Meteoritical Bulletin Database
Northwest Africa 13509
Basic information
Name:
Northwest Africa 13509
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 13509
Observed fall:
No
Year found:
2018
Country:
(Northwest Africa)
Mass:
1239 g
Classification
history:
Recommended:
LL4-6
[explanation]
This is 1 of 71 approved meteorites classified as LL4-6.
[show all]
Search for other:
LL chondrites
,
LL chondrites (type 4-7)
,
Ordinary chondrites
, and
Ordinary chondrites (type 4-7)
Comments:
Approved 2 Nov 2020
Writeup
Writeup from MB 109:
Northwest Africa 13509
(NWA 13509)
(Northwest Africa)
Purchased: 2018 Sep
Classification: Ordinary chondrite (LL4-6)
History
: Purchased by John Higgins in September 2018 from a Mauritanian dealer.
Petrography
: (A. Irving,
UWS
and P. Carpenter,
WUSL
) Very fresh recrystallized breccia composed of Type 6 lithic clasts (containing rare remnant chondrules) plus large (up to 5 mm in diameter), well-formed, equilibrated discrete chondrules (Type 4) in a fine grained, highly recrystallized matrix containing troilite, pentlandite, taenite and chromite.
Geochemistry
: Olivine (31.2±0.2, range Fa
30.9-31.5
, N = 5), low-Ca pyroxene (Fs
25.4±0.1
Wo
1.8±0.3
, range Fs
25.3-25.6
Wo
1.3-2.0
, N = 5), augite (Fs
10.5±0.3
Wo
43.7±0.3
, range Fs
10.2-10.7
Wo
43.5-44.1
, N = 3).
Classification
: Ordinary chondrite (LL4-6 breccia, highly recrystallized).
Specimens
: 45 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 2018 Sep
Mass (g):
1239
Pieces:
2
Class:
LL4-6
Shock stage:
S2
Weathering grade:
W0/1
Fayalite (mol%):
31.2±0.2
Ferrosilite (mol%):
25.4±0.1
Wollastonite (mol%):
1.8±0.3
Classifier:
A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):
45
Type spec location:
UWB
Main mass:
J. Higgins
Comments:
Work name JH20-5; submitted by A. Irving
Institutions
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)
WUSL
: Washington Univ.
UWB
: University of Washington,
References:
Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Geography:
Coordinates:
Unknown.
Statistics:
This is 1 of 7409 approved meteorites from
(Northwest Africa)
(plus 1955 unapproved names)
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.
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