|
Northwest Africa 12279 | |||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 12279 This is an OFFICIAL meteorite name. Abbreviation: NWA 12279 Observed fall: No Year found: 2017 Country: Algeria Mass: 1830 g | ||||||||||||||||||||||||
Classification history: |
This is 1 of 334 approved meteorites classified as Lunar (feldsp. breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||
Comments: | Approved 11 Dec 2018 | ||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 12279 (NWA 12279) Tindouf, Algeria Find: 2016 Oct 10 Classification: Lunar meteorite (feldspathic breccia) History: The meteorite was purchased in Denver USA by Zhouping Guo and Guobing Zhong on September, 2017 from Adam Aaronson. Physical characteristics: A single bulk specimen, with sepia fresh fusion crust and low weathering degree. A large impact molten mass was observed in the specimen. Petrography: This lunar meteorite comprises two petrographic areas: impact melt breccia and anorthosite. The anorthosite includes forsterite, pigeonite, low-Ca pyroxene, plagioclase and minor minerals such as ilmenite, chromite, quartz and other opaque minerals. It has a subophitic structure. The impact-melt breccia contains various types of lithic clasts (anorthosite, olivine-gabbro, gabbro), mineral and glassy fragments. The matrix consists of very fine-grained, cryptocrystalline (~0.1mm) and vitric particles with sporadic small vesicles. Geochemistry (JK. Zhou, HY. Chen, ZP. Xia GUT): Olivine, Fa12.8-46.3Fo53.8-87.3, FeO/MnO=66.3-96.9 (n=29); Orthopyroxene, Fs15.5-32.2Wo2.98-4.22En64.9-80.3, Fe/Mn(mol)=54.5-69.3 (n=3); Pigeonite: Fs23.2-53.1Wo7.19-23.7En39.8-57.4, Fe/Mn(mol)=51.1-61.7 (n=6); Augite, Fs8.42-44.4Wo31.4-44.1En18.7-47.5, Fe/Mn(mol)=37.1-53.9 (n=14); Plagioclase: An92.9-98.5Or0.06-0.69 (n=15); Spinel: MgO, 20.1%-23.6%; Al2O3, 59.5%-69.2%; Cr2O3, 3.91%-6.00%; FeO,6.05%-7.46%. Classification: Lunar (anorthositic impact-melt breccia) Specimens: 30.2 g including one polished thin section are deposited in GUT; Remaining material with Guobing Zhong and Zhouping Guo. | ||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
|
||||||||||||||||||||||||
Institutions and collections |
GUT: College of Earth Sciences, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China (institutional address; updated 18 Oct 2012) Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010) |
||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
| ||||||||||||||||||||||||
Photos: |
| ||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 58 approved meteorites from Tindouf, Algeria (plus 1 impact crater) This is 1 of 1336 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||
Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
| ||||||||||||||||||||||||
Revision history: |
This lists important revisions made to data for this record.
|