This is only 1 of 3 meteorites ever to be classified as Lunar Troctolitiic melt breccia
Studied and classified by world renowned Dr Anthony J. Irving and team at University of Washington
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OFFICIAL CLASSIFICATION DATA SOURCE THE METEORITICAL SOCIETY INTERNATIONAL SOCIETY FOR METEORITICS AND PLANETARY SCIENCE LUNAR AND PLANETARY INSTITUTE METEORITICAL BULLETIN DATABASE
Name:Touat 008 This is an OFFICIAL meteorite name. Abbreviation:There is no official abbreviation for this meteorite. Observed fall:No Year found:2023 Country:Algeria Mass:2.96 kg
Classification history:
Recommended:
Lunar (troct. melt breccia)
This is 1 of 2 approved meteorites classified as Lunar (troct. melt breccia).
Comments:
Approved 15 Oct 2023
Writeup
Writeup from MB 112:
Touat 008 27.150°N , 01.042°W
Adrar, Algeria
Find: 2023 Feb
Classification: Lunar (troct. melt breccia)
History: Found in Algeria in February 2023 and purchased from the finder by Mbark Arjdal in Febriary and May 2023.
Petrography: (A. Irving,UWS, and P. Carpenter,WUSL) Breccia dominated by mineral debris and some lithic clasts related to troctolitic lithologies. Mean grainsize is ~100 µm. Portions of the very fine grained matrix exhibit fluidal textures and contain sparse vesicles. Accessory phases include Cr-bearing pleonaste, troilite (commonly altered to secondary barite), low-Ti chromite and calcite (as patchy secondary alteration of plagioclase).
Geochemistry: Anorthite (An95.9-96.8Or0.1-0.0, N = 4), olivine (Fa20.0-24.0, FeO/MnO = 74-89, N = 5), pigeonite (Fs19.4-19.9Wo5.0-6.9, FeO/MnO = 42-55, N = 4), subcalcic augite (Fs13.0Wo34.4, FeO/MnO = 40; Fs27.5Wo21.7, FeO/MnO = 51; Fs43.9Wo29.2, FeO/MnO = 63; N = 3).
Classification: Lunar (troctolitiic melt breccia). This material is similar in many respects toRafsa 002.
Specimens: 45.3 g including a polished endcutt atUWB; remainder with Mr. M. Arjdal.
Data from: MB112 Table 0 Line 0:
State/Prov/County:
Adrar
Place of purchase:
Algeria
Date:
2023 Feb
Latitude:
27.150°N
Longitude:
01.042°W
Mass (g):
2955
Pieces:
many
Class:
Lunar (troct. melt breccia)
Shock stage:
high
Weathering grade:
low
Fayalite (mol%):
20.0-24.0
Ferrosilite (mol%):
19.4-19.9;
Wollastonite (mol%):
5.0-6.9
Classifier:
(A. Irving, UWS, and P. Carpenter, WUSL)
Type spec mass (g):
45.3
Type spec location:
UWB
Main mass:
M. Arjdal
Comments:
Work name Arj ZM 850; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Catalogs:
References:
Published in Meteoritical Bulletin, no. 112, in preparation (2023)
Find references in NASA ADS:
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Geography:
Coordinates:
Recommended::
(27° 9' 0"N, 1° 2' 31"W)
Statistics: This is 1 of 194 approved meteorites fromAdrar, Algeria(plus 1 unapproved name) This is 1 of 1311 approved meteorites fromAlgeria(plus 30 unapproved names) (plus 4 impact craters)
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Lunar (troct. melt breccia)means:
"A lunar meteorite that is a melt breccia derived from troctolite."
The highlighted words are defined as follows:
lunar meteorite: Lunar meteorites are lunar rocks that were ejected from the Moon by impacts and later fell to the Earth as meteorites. .
