Meteorite NWA 15244 ACHONDRITE HED EUCRITE MONOMICT BRECCIA GABBROIC METEORITE

Description

NWA 15244
HED
ACHONDRITE EUCRITE
MONOMICT BRECCIA
METEORITE
FOUND IN JANUARY 2022
IN NIGER
57.3 GRAM
This meteorite is officially classified & approved as NWA 15244
Classified, studied by world renowned Dr Anthony J. Irving and team at
Department of earth and space sciences
University of Washington
GUARANTEED AUTHENTICITY
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First class express 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
OFFICIAL CLASSIFICATION DATA SOURCE:
THE METEORITICAL SOCIETY
INTERNATIONAL SOCIETY FOR METEORITICS AND PLANETARY SCIENCE
LUNAR AND PLANETARY INSTITUTE
METEORITICAL BULLETIN DATABASE
Northwest Africa 15244
Basic information
Name:
Northwest Africa 15244
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 15244
Observed fall:
No
Year found:
2022
Country:
Niger
Mass:
776 g
Classification
history:
Recommended:
Eucrite-mmict
Comments:
Approved 5 Sep 2022
Writeup
Writeup from MB 111:
Northwest Africa 15244
(NWA 15244)
Niger
Purchased: 2022 Jan
Classification: HED achondrite (Eucrite, monomict)
History
: Purchased by Mbark Arjdal in January 2022 from a dealer in Niger.
Petrography
: (A. Irving,
UWS
and J. Boesenberg,
BrownU
) Fresh monomict breccia composed of lithic intergranular clasts (exhibiting some variation in grainsize) plus related crystalline debris in a sparse fine grained matrix. Major minerals are exsolved pigeonite and calcic plagioclase together with accessory unexsolved pigeonite, silica polymorph, fayalite, ilmenite, chromite, troilite and merrillite.
Geochemistry
: Low-Ca pyroxene host (Fs
59.5-63.4
Wo
1.6-3.8
, FeO/MnO = 31-33, N = 7), augite exsolution lamellae (Fs
26.2-27.8
Wo
42.9-43.5
, FeO/MnO = 30-31, N = 4), plagioclase (An
83.4-90.5
Or
0.9-0.2
, N = 6), fayalite (Fa
80.6
, FeO/MnO = 44).
Classification
: Eucrite (monomict breccia).
Specimens
: 29.5 g including one polished thin section at
UWB
; remainder with Mr. M. Arjdal.
Data from:
MB111
Table 0
Line 0:
Place of purchase:
Niger
Date:
P 2022 Jan
Mass (g):
776
Pieces:
many
Class:
Eucrite-mmict
Shock stage:
low
Weathering grade:
low
Ferrosilite (mol%):
59.5-63.4; 26.2-27.8
Wollastonite (mol%):
1.6-3.8; 42.9-43.5
Classifier:
A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):
29.5
Type spec location:
UWB
Main mass:
M. Arjdal
Comments:
Work name Arj ZM 808; 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)
UWB
: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
BrownU
: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
Catalogs:
References:
Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:
Coordinates:
Unknown.
Statistics:
This is 1 of 97 approved meteorites from
Niger
(plus 5 unapproved names)
Also see:
This lists the most popular meteorites among people who looked up this meteorite.
Revision
history:
This lists important revisions made to data for this record.
Classification: Eucrite (monomict breccia, gabbroic).
Eucrite-mmict means: "An achondrite from the eucrite group; the meteorite is a monomict breccia."
The highlighted words are defined as follows:
achondrite: A stony meteorite that lacks chondrules and originated on a differentiated parent body.
eucrite: Eucrites are the most abundant type of basaltic achondrite, linked by geochemical traits such as oxygen isotopic ratios and certain elemental ratios, of which Fe/Mn is the most widely cited. The main minerals in eucrites are Fe-rich pyroxene and Na-poor plagioclase. The eucrites are strongly linked with the diogenites and howardites; the three groups are collectively known as  meteorites and may come from asteroid 4 Vesta.