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Gadamis 003
Basic information Name: Gadamis 003
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2021
Country: Libya
Mass:help 1270 g
Classification
  history:
Recommended:  Lunar (anorth)    [explanation]

This is 1 of 78 approved meteorites classified as Lunar (anorth).   [show all]
Search for other: Lunar meteorites
Comments: Approved 15 Dec 2021
Writeuphelp
Writeup from MB 110:

Gadamis 003        30.284°N, 11.005°E

Ghadamis, Libya

Find: 2021

Classification: Lunar meteorite (anorth)

History: This meteorite was reportedly found in Libya at the same location as Gadamis 002 in 2021, purchased by Abdelhadi Aithiba in 2021.

Physical characteristics: Two identically appearing stones (670 and 600 g) found together at the Gadamis 002 site. The stones have a light green sand-blasted exterior, patches of smoothed dark fusion crust, as well as some light tan desert weathering. Polished sawcut surfaces reveal a brecciated, very fine-grained light gray interior with a few scattered white grains.

Petrography: (A. Ross and C. Agee, UNM) Microprobe analysis reveals a significantly brecciated, cataclastic anorthitic plagioclase host making up 98-99% of this meteorite. Poikilitically enclosed in the plagioclase are sparse, very small olivine and pyroxene blebs (most in the range 5-10 μm). Larger pyroxene grains are scarce with two larger grains in size range of 300 μm observed in the microprobe mount. Together, olivine and pyroxene make up a total of ~1-2% of this meteorite.

Geochemistry: (A. Ross, UNM) Plagioclase An96.1±0.4Ab3.8±0.4Or0.2±0.1, n=6; olivine Fa39.1±0.8, Fe/Mn=105±5, n=6; pigeonite Fs32.9±4.9Wo6.1±2.5, Fe/Mn=59±4, n=5.

Classification: Lunar ferroan anorthosite, cataclastic. Olivine, pigeonite and plagioclase compositional values plot within the FAN suite field (after Warren, 1993). The very high anorthite content (98-99%) and cataclastic texture is similar to Apollo 16 cataclastic FANs. Paired with Gadamis 002.

Specimens: 24.32 g on deposit at UNM, Mark Lyon and Craig Zlimen hold the main masses.

Bibliography:
  • Warren P.H. (1993) A concise compilation of petrologic information on possibly pristine nonmare Moon rocks. American Mineralogist 78 (3-4), 360-376. (link)
Data from:
  MB110
  Table 0
  Line 0:
State/Prov/County:Ghadamis
Date:2021
Latitude:30.284°N
Longitude:11.005°E
Mass (g):1270
Pieces:2
Class:Lunar (anorth)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):39.1±0.8
Ferrosilite (mol%):32.9±4.9
Wollastonite (mol%):6.1±2.5
Classifier:C. Agee, UNM
Type spec mass (g):24.32
Type spec location:UNM
Main mass:Mark Lyon and Craig Zlimen
Comments:Fieldname ABA-1044; submitted by C. Agee
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dirk Hohmann      
Domjan Svilkovic   
Robert Smart      
Geography:

Libya
Coordinates:
     Recommended::   (30° 17' 2"N, 11° 0' 18"E)

Statistics:
     This is 1 of 29 approved meteorites from Ghadamis, Libya (plus 2 unapproved names)
     This is 1 of 1529 approved meteorites from Libya (plus 23 unapproved names) (plus 2 impact craters)
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