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Issaouane-n-Irrararene 001
Basic information Name: Issaouane-n-Irrararene 001
     This is an OFFICIAL meteorite name.
Abbreviation: InI 001
Observed fall: No
Year found: 2021
Country: Algeria
Mass:help 161.2 g
Recommended:  Lunar    [explanation]

This is 1 of 102 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 21 Jan 2022
Writeup from MB 111:

Issaouane-n-Irrararene 001 (InI 001)        27.51447°N, 7.762492°E

Illizi, Algeria

Find: 2021 Apr

Classification: Lunar-melt rock

History: Found near Edjeleh, Algeria. Purchased by Aziz Zad in April 2021 from a dealer in Ouargla, Algeria and subsequently acquired by Jay Piatek in June 2021.

Physical characteristics: A single stone (161.2 g) partially coated by fusion crust.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Very fine grained specimen (mean grainsize ~40 µm). Lozenge-shaped oikocrysts (up to ~4 mm) of highly recrystallized, polycrystaline pigeonite (exhibiting some preferred orientation of their long axes) enclose chadacrysts of polycrystalline anorthite and subordinate olivine. Smaller oikocrysts of ilmenite also enclose plagioclase chadacrysts. Additional accessory phases are high-Ti chromite, troilite and baddeleyite.

Geochemistry: Olivine (Fa33.8-48.0, FeO/MnO = 105-121, N = 4), pigeonite (Fs26.3-38.6Wo7.2-13.7, FeO/MnO = 68-73, N = 4), plagioclase (An92.5-95.8Or0.5-0.3, N = 3).

Classification: Lunar (poikilitic mafic melt rock). This specimen has many similarities to some Apollo 16 POIK rocks.

Specimens: 22.5 g including one polished thin section at UWB; remainder with Mr. J. Piatek.

Data from:
  Table 0
  Line 0:
Place of purchase:Ouargla, Algeria
Date:2021 Apr
Mass (g):161.2
Class:Lunar-melt rock
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):33.8-48.0
Ferrosilite (mol%):26.3-38.6
Wollastonite (mol%):7.2-13.7
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):22.5
Type spec location:UWB
Main mass:J. Piatek
Comments:Work name WZY-47; submitted by A. Irving
   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)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     Recommended::   (27° 30' 52"N, 7° 45' 45"E)

     This is 1 of 8 approved meteorites from Illizi, Algeria
     This is 1 of 1270 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)
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