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| Northwest Africa 13739 | |||||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 13739 This is an OFFICIAL meteorite name. Abbreviation: NWA 13739 Observed fall: No Year found: 2020 Country: Algeria Mass:  712 g | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 106 approved meteorites classified as Lunar. [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||||
| Comments: | Approved 28 Mar 2021 | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 110:
Northwest Africa 13739 (NWA 13739) Tindouf, Algeria Purchased: 2020 Classification: Lunar meteorite History: Many fragments weighing a total of 712 g were found near Tindouf, Algeria, by locals. Carlos Muñecas (Expometeoritos) and Adrian Contreras purchased these samples from a dealer in Tindouf in November 2020. Physical characteristics: Samples are irregularly shaped and lack fusion crust. Most samples are covered with a coating of caliche that also occurs within the interior of the samples in fractures. The interior is a dark-colored, fine-grained breccia. Petrography: Description and classification (A. Love, App) Sample is a complex breccia composed of fine-grained (250 µm avg.) lithic and olivine, low- and high-Ca pyroxene, pigeonite and mineral fragments: gabbroic clasts, brecciated feldspathic clasts, FeNi metal and rare symplectites composed of fayalitic olivine and silica. This assemblage is crosscut by a several generations of crosscutting melt veins. Additional Minerals are sulfides, chromite, ilmenite, rare phosphates and secondary calcite. Geochemistry: Microgabbro: olivine (Fa30.0±8.9, Fe/Mn=80.4±10.2, n=12); low Ca pyroxene (Fs24.7±2.1Wo4.1±0.6, Fe/Mn=55.6±6.5, n=5); Mineral fragments: pigeonite (Fs30.9±6.2Wo12.0±5.0, Fe/Mn=52.9±4.2, n=15); high Ca pyroxene (Fs43.6±16.2Wo27.4±4.8, Fe/Mn=56.7±7.6, n=6); plagioclase (An96.8±0.9Or0.1±0.1, n=15). Classification: Lunar (feldspathic breccia) Based on textures and mineral compositions, this sample is a lunar feldspathic breccia. Specimens: Carlos Muñecas (Expometeoritos) holds the 228 g main mass and Adrian Contreras and Carlos Muñecas jointly hold the remaining 484 g. Eleven small fragments weighing a total of 23.47 g and a polished thin section are on deposit at App. | ||||||||||||||||||||||||||||||||
| Data from: MB110 Table 0 Line 0: |
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| Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) |
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| 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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Geography:
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Statistics: This is 1 of 60 approved meteorites from Tindouf, Algeria (plus 1 impact crater) This is 1 of 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||||
| Also see: |
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| Revision history: |
This lists important revisions made to data for this record.
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