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El Hassan Ould Hamed 002
Basic information Name: El Hassan Ould Hamed 002
     This is an OFFICIAL meteorite name.
Abbreviation: EHOH 002
Observed fall: No, but it is possible
Year found: 2021
Country: Mauritania
Mass:help 5.45 kg
Classification
  history:
Recommended:  L4    [explanation]

This is 1 of 1940 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 12 Feb 2022
Revised 3 Apr 2022: Adjusted mass
Writeuphelp
Writeup from MB 111:

El Hassan Ould Hamed 002 (EHOH 002)        25°54’48.0"N, 7°30’43.4"W

Tiris Zemmour, Mauritania

Find, possible fall: 2021 Nov

Classification: Ordinary chondrite (L4)

History: On November 6, 2021, at around 1 pm Saharawi people residing in the refugee camp of Dakhla (about 200 km south of Tindouf, Algeria) heard a strong sonic boom confirmed by many people in the neighboring countries of Mauritania and Western Sahara. A few days later, many meteorite fragments with fresh fusion crust have been recovered by meteorite hunters in northern Mauritania close to the Algerian border (Tindouf province). Mr. Salamu Ali purchased a 446 g fragment and submitted it for classification. Ziyao Wang owns an additional 5 kg.

Physical characteristics: Almost completely covered with fresh fusion crust. Cut surfaces reveal a fresh light grayish interior with minor orange halos around shiny metal grains.

Petrography: The meteorite shows a chondritic texture with well-defined, mostly rounded, packed porphyritic and barred chondrules (apparent mean diameter about 0.7 µm) in a fine-grained matrix that contains unaltered sulfides and FeNi metal.

Geochemistry: olivine: Fa24.2±0.1 (Fa23.9-24.4, n=11); low-Ca pyroxene: Fs20.2±0.2Wo2.1±0.1 (Fs19.9-20.6Wo1.9-2.2, n=11); Ca-pyroxene: Fs8.4±0.1Wo43.8±0.2 (Fs8.2-8.6Wo43.5-44.2, n=5); feldspar: An10.6±0.1Ab83.7±0.6Or5.7±0.6, n=4

Classification: Ordinary chondrite (L4)
Specimens: 50 g, MNB;  446 g, S. Ali; 5 kg, WangZ; additional research specimens at UWB, UNM, and Cascadia.

Data from:
  MB111
  Table 0
  Line 0:
State/Prov/County:Tiris Zemmour
Date:2021 Nov
Latitude:25°54'48.0"N
Longitude:7°30'43.4"W
Mass (g):5446
Pieces:1
Class:L4
Shock stage:S1
Weathering grade:W0
Fayalite (mol%):24.2±0.1 (n=11)
Ferrosilite (mol%):20.2±0.2 (n=11)
Wollastonite (mol%):2.1±0.1
Magnetic suscept.:4.96
Classifier:A. Greshake, MNB
Type spec mass (g):50
Type spec location:MNB
Main mass:Salamu Ali, WangZ
Finder:anonymous
Comments:L4; submitted by Ansgar Greshake
Institutions
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
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. 111, in preparation (2022)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Robert Smart   
Ryan Upchurch   
Geography:

Mauritania
Coordinates:
     Recommended::   (25° 54' 48"N, 7° 30' 43"W)

Statistics:
     This is 1 of 12 approved meteorites from Tiris Zemmour, Mauritania (plus 1 impact crater)
     This is 1 of 166 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)
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