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El Milhas 001
Basic information Name: El Milhas 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2022
Country: Mauritania
Mass:help 385 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 334 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 6 Aug 2022
Writeuphelp
Writeup from MB 111:

El Milhas 001        25.684°N, 7.173°W

Tiris Zemmour, Mauritania

Find: 2022 Apr

Classification: Lunar meteorite (feldspathic breccia)

History: Two similar-appearing stones were found together in Mauritania in April 2022 at 25.684°N, 7.173°W and were subsequently purchased by Jason Phillips and James Tobin from a Mauritanian dealer in May 2022.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of mineral clasts of anorthite, olivine (with a wide compositional range), low-Ca pyroxene, unexsolved pigeonite, exsolved pigeonite and augite, together with some troctolitic lithic clasts, in a fine grained matrix containing taenite, pentlandite and troilite. The troctolitic clasts are composed predominantly of Mg-rich olivine and anorthite in distinct monomineralic layers.

Geochemistry: Anorthite (An96.3-97.6Or0.0, N = 3), olivine (Fa12.2-54.9, FeO/MnO = 94-99, N = 4), low-Ca pyroxene (Fs10.2-10.3Wo4.4-4.8, FeO/MnO = 52-57, N = 2), pigeonite (Fs23.1-23.9Wo10.7-7.9, FeO/MnO = 56-60, N = 2), augite exsolution lamellae (Fs5.3-5.4Wo43.1-43.0, FeO/MnO = 31-38, N = 2), pigeonite exsolution lamella (Fs11.6Wo7.0, FeO/MnO = 59), augite (Fs10.2Wo42.3, FeO/MnO = 39; Fs21.7Wo37.6, FeO/MnO = 61; N = 2).

Classification: Lunar (feldspathic breccia).

Specimens: 24.8 g in the form of a polished endcut at UWB; remainder held jointly by Mr. J. Phillips and Mr. J. Tobin.

Data from:
  MB111
  Table 0
  Line 0:
State/Prov/County:Tiris Zemmour
Place of purchase:Mauritania
Date:2022 Apr
Latitude:25.684°N
Longitude:7.173°W
Mass (g):385.3
Pieces:2
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):12.2-54.9
Ferrosilite (mol%):10.2-10.3; 23.1-23.9; 10.2; 21.7
Wollastonite (mol%):4.4-4.8; 7.9-10.7; 37.6-42.3
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):24.8
Type spec location:UWB
Main mass:J. Phillips and J. Tobin
Comments:Work name JP22-1; 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)
Tobin: J. Tobin, The Meteorite Exchange, PMB #455, P.O. Box 7000, Redondo Beach, CA 90277, United States (private address)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography:

Mauritania
Coordinates:
     Recommended::   (25° 41' 2"N, 7° 10' 23"W)

Statistics:
     This is 1 of 28 approved meteorites from Tiris Zemmour, Mauritania (plus 1 impact crater)
     This is 1 of 217 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)
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