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Ghadduwah 001
Basic information Name: Ghadduwah 001
     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 265 g
Meteoritical Bulletin:  MB 109  (2021)  Lunar (anorth)
Recommended:  Lunar (anorth)    [explanation]

This is 1 of 83 approved meteorites classified as Lunar (anorth).   [show all]
Search for other: Lunar meteorites
Comments: Approved 5 Sep 2020
Writeup from MB 109:

Ghadduwah 001        26.803056, 13.535278

Awbari, Libya

Find: 2020 Jan 7

Classification: Lunar meteorite (anorth)

History: This stone was found by vacationers on January 7, 2020, near Lake Gaberoun, Libya.

Physical characteristics: Single stone covered in pale-green, glassy fusion crust; oriented shape with a broad rollover lip. One side of the stone is broken and the interior is exposed, however this is not recent fracture as the surface is slightly weathered and smoothed. A freshly fractured surface shows a sugary, shiny texture of white to light gray grains.

Petrography: (C. Agee, UNM) Microprobe and SEM reveals an anorthitic plagioclase host without visible grain boundaries making up ~92% of this meteorite. Poikiolitically enclosed in the plagioclase are olivine and pyroxene grains, most in the size range 100-300 μm, making up a total of ~7% of this meteorite. Olivine grains are very homogeneous, some with resorbed rims. Pyroxene grains have exsolution lamellae with coarser bands of low-Ca pyroxene and finer bands of augite. Accessory chromite was observed throughout. Fusion crust is ~75 μm thick.

Geochemistry: (C. Agee, UNM) Plagioclase An98.1±0.8Ab1.8±0.3Or0.0±0.0, n=4; pyroxene Fs30.5±6.2Wo12.7±11.4, Fe/Mn=52±8, n=9; olivine Fa40.9±0.3, Fe/Mn=88±3, n=6; fusion crust SiO2=43.1±0.2, Al2O3=31.0±0.1, FeO=3.7±0.2, MgO=3.3±0.1, MnO=0.05±0.03, CaO=17.0±0.1, Na2O=0.19±0.02 all wt%, n=5. Oxygen isotopes (K. Ziegler, UNM): 3 acid-washed fragments analyzed by laser fluorination gave δ18O= 5.810, 6.152, 5.852; δ17O= 3.038, 3.198, 3.042; Δ17O= -0.029, -0.050, -0.047 (linearized, all per mil, TFL slope=0.528).

Classification: Lunar ferroan anorthosite, unbrecciated. Olivine, pyroxene and plagioclase compositional values plot within the FAN suite field (after Warren, 1993).

Specimens: 20.6 g on deposit at UNM, Abdelhadi Aithiba holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Libya
Date:2020 Jan 7
Mass (g):265
Class:Lunar (anorth)
Shock stage:low
Weathering grade:low
Fayalite (mol%):40.9±0.3
Ferrosilite (mol%):30.5±6.2
Wollastonite (mol%):12.7±11.4
Classifier:C. Agee, UNM
Type spec mass (g):20.6
Type spec location:UNM
Main mass:Abdelhadi Aithiba
Comments:Field name BD-15; submitted by C. Agee, UNM
Plots: O isotopes:  
   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., Bullock E., Chennaoui Aoudjehane H., Debaille V., D’Orazio M., Komatsu M., Miao B. and Schrader D. L. (2021) The Meteoritical Bulletin, No. 109. Meteoritics & Planetary Science 56, 1626–1630.
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     Recommended::   (26° 48' 11"N, 13° 32' 7"E)

     This is 1 of 7 approved meteorites from Awbari, Libya
     This is 1 of 1562 approved meteorites from Libya (plus 25 unapproved names) (plus 2 impact craters)
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