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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  (2020)  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 Meteoritical Bulletin, no. 109, in preparation (2020)
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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 1549 approved meteorites from Libya (plus 23 unapproved names) (plus 2 impact craters)
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