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| Ghadduwah 001 | |||||||||||||||||||||||||||||||||||||
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| 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:  265 g | ||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 82 approved meteorites classified as Lunar (anorth). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||||||||
| Comments: | Approved 5 Sep 2020 | ||||||||||||||||||||||||||||||||||||
| Writeup |
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: MB109 Table 0 Line 0: |
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| Plots: | O isotopes: | ||||||||||||||||||||||||||||||||||||
| 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) |
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| References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:
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Statistics: This is 1 of 7 approved meteorites from Awbari, Libya This is 1 of 1539 approved meteorites from Libya (plus 23 unapproved names) (plus 2 impact craters) | ||||||||||||||||||||||||||||||||||||
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