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Djoua 001
Basic information 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:help 22.51 kg
Classification
  history:
Recommended:  Aubrite    [explanation]

This is 1 of 76 approved meteorites classified as Aubrite.   [show all]
Search for other: Achondrites, Aubrites, Enstatite achondrites, and Enstatite-rich meteorites
Comments: Approved 4 Dec 2021
Writeuphelp
Writeup from MB 110:

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 Benamar, 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 (Fs0.1±0.3Wo0.7±0.1, range Fs0.0-0.8Wo0.6-1.0, N = 6), diopside (Fs0.3±0.5Wo44.9±3.4, range Fs0.0-0.9Wo48.3-41.9, 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. Benamar) 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).

Data from:
  MB110
  Table 0
  Line 0:
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
Ferrosilite (mol%):0.1±0.3; 0.3±0.5
Wollastonite (mol%):0.7±0.1; 44.9±3.4
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):118
Type spec location:UWB
Main mass:WangZ, A. Zad, M. Cimala, M. Lyon, C. Zlimen, R. Vargas, H. Naji
Comments:Work names WZY-48, MC 194 and AliB01; 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., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Denis gourgues      
Dirk Hohmann      
Domjan Svilkovic   
Jay Buscio   
Robert Smart   
Ryan Upchurch   
Ziyao Wang         
Geography:

Algeria
Coordinates:
     Recommended::   (28° 2' 42"N, 8° 9' 47"E)

Statistics:
     This is 1 of 8 approved meteorites from Illizi, Algeria
     This is 1 of 1223 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)
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