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The never-ending discovery of Meteorites, brought to you by {name}

Francesco Moser

Gadamis 003 is a rare type of a lunar meteorite, classified as lunar ferroan anorthosite. It is very close in composition and in looks to the Apollo 16 samples returned to earth by the NASA astronauts from the lunar higland areas. 

The metbull information appears below. 

I am IMCA member no. 3229

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:	
Meteoritical Bulletin:  	MB 110  	(2022)  	Lunar (anorth)
Recommended:  			Lunar (anorth)    [explanation]

This is 1 of 85 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.

Switzerland

Gadamis 003 Lunar Anorthosite - 5.3 g - (1)

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Gadamis 003 Lunar Anorthosite - 5.3 g - (1)

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