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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:
Meteoritical Bulletin:  MB 111  (2023)  L4
Recommended:  L4    [explanation]

This is 1 of 2062 approved meteorites (plus 5 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
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 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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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Chunliang Zhang            
Domjan Svilkovic   
Robert Smart         
Ryan Upchurch   
Wojciech Moscinski   
Ziyao Wang                  
Geography:

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

Statistics:
     This is 1 of 28 approved meteorites from Tiris Zemmour, Mauritania (plus 1 impact crater)
     This is 1 of 221 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)
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