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Gadamis 002
Basic information Name: Gadamis 002
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2020
Country: Libya
Mass:help 712 g
Recommended:  Lunar (anorth)    [explanation]

This is 1 of 80 approved meteorites classified as Lunar (anorth).   [show all]
Search for other: Lunar meteorites
Comments: Approved 29 May 2021
Revised 6 Jun 2021: renamed NEA 025 --> Gadamis 002
Writeup from MB 110:

Gadamis 002        30.284°N, 11.005°E

Nalut, Libya

Find: 2020

Classification: Lunar meteorite (anorth)

History: This meteorite was reportedly found in Libya in the vicinity of Ghadames in 2020, purchased by Jay Piatek in 2021. It was initially released 29 May 2021 as Northeast Africa 025, but changed to Gadamis 002 when coordinates were reported a week later.

Physical characteristics: Three identically appearing stones found together (448 g, 182 g, 82 g). The stones have a light green sand-blasted exterior, some smoothed dark fusion crust is also present. Broken surfaces reveal a very fine-grained light-gray interior with a few scattered white grains. Some very thin shock melt veins are visible.

Petrography: (C. Agee, UNM) Microprobe analysis reveals a significantly brecciated, cataclastic anorthitic plagioclase host making up 98-99% of this meteorite. Poikiolitically 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. Tiny (<1 μm) sulfide blebs are ubiquitous. Scattered titaniferous chromite (1-5 μm) were also observed.

Geochemistry: (C. Agee, UNM) Plagioclase An96.7±0.5Ab3.1±0.6Or0.2±0.1, n=6; olivine Fa42.7±0.6, Fe/Mn=101±5, n=7; pigeonite Fs23.9±5.8Wo9.4±0.8, Fe/Mn=74±6, n=3; augite Fs12.8±10.7Wo35.0±9.4, Fe/Mn=82±13, n=3.

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.

Specimens: 20.5 g on deposit at UNM, Jay Piatek holds the main masses.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Mass (g):712
Class:Lunar (anorth)
Shock stage:high
Weathering grade:low
Fayalite (mol%):42.7±0.6
Ferrosilite (mol%):23.9±5.8, 12.8±10.7
Wollastonite (mol%):9.4±0.8, 35.0±9.4
Classifier:C. Agee, UNM
Type spec mass (g):20.5
Type spec location:UNM
Main mass:Jay Piatek
Comments:Submitted by C. Agee
   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)
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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     Recommended::   (30° 17' 3"N, 11° 0' 19"E)

     This is the only approved meteorite from Nalut, Libya
     This is 1 of 1537 approved meteorites from Libya (plus 23 unapproved names) (plus 2 impact craters)
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Synonymshelp: NEA 025 (Meteorite renamed upon release of coords)
Northeast Africa 025 (Meteorite renamed upon release of coords)

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