3.18 grams DJOUA 001 Meteorite Enstatite achondrite (Aubrite) as found with COA

Description

Djoua 001
Name:
Djoua 001
This is an OFFICIAL meteorite name.
Abbreviation:
There is no official abbreviation for this meteorite.
Observed fall:
No
Year found:
2021
Country:
Algeria
Mass:
22.5 kg
Recommended:
Aubrite
This is 1 of 72 approved meteorites classified as Aubrite.
Approved 4 Dec 2021
Djoua 001
28.045°N, 8.163°E
Illizi, Algeria
Find: 2021 Feb
Classification: Enstatite achondrite (Aubrite)
History
: Scattered pieces of a very large, pale colored achondrite were found in February and March 2021 purportedly near Djoua, Algeria. Several small pieces were obtained by Ali Benamro, and three larger pieces were purchased by Aziz Zad in April 2021 from a dealer in Ouargla, Algeria. Additional material was acquired from Algerian dealers by Marcin Cimala and Habib Naji in May 2021 and by Mark Lyon (in collaboration with Craig Zlimen and Roberto Vargas) in July 2021.
Physical characteristics
: Exterior surfaces of the stones have black coatings in places which may be degraded fusion crust. Interiors are overall mottled beige and gray in color with sporadic small dark and rusty spots. Rare tiny grains of fresh metal are visible on polished pieces. Some large whitish grains (enstatite) are up to 1.5 cm across.
Petrography
: (A. Irving,
UWS
and P. Carpenter,
WUSL
) Very coarse grained unbrecciated aggregate of predominantly enstatite with accessory diopside, daubreelite, Ti-Cr-bearing troilite and rare Ni-poor kamacite. No plagioclase was found in the studied slice or endcut.
Geochemistry
: Enstatite (Fs
0.1±0.3
Wo
0.7±0.1
, range Fs
0.0-0.8
Wo
0.6-1.0
, N = 6), diopside (Fs
0.3±0.5
Wo
44.9±3.4
, range Fs
0.0-0.9
Wo
48.3-41.9
, N = 3), troilite (Ti 2.9 wt.%, Cr 0.3 wt.%), Ni-poor kamacite (Ni 1.5-2.2 wt.%, Si 0.02-0.08 wt.%, N = 4).
Classification
: Aubrite.
Specimens
: 138 g (26 g of which was donated by A. Benamro) including a polished slice and small polished endcut at
UWB
; remaining material with A. Zad and
WangZ
(8250 g), M. Cimala (1830 g), M. Lyon (3700 g in two pieces), C. Zlimen (2580 g), R. Vargas (120 g) and H. Naji (6014 g).
State/Prov/County:
Illizi
Place of purchase:
Algeria
Date:
2021 Feb
Latitude:
28.045°N
Longitude:
8.163°E
Mass (g):
22506
Pieces:
several
Class:
Aubrite
Shock stage:
low
Weathering grade:
low
Nice specimen for your collection.  Authenticity guaranteed.
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