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Northwest Africa 13434 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13434 This is an OFFICIAL meteorite name. Abbreviation: NWA 13434 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: 123.7 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 102 approved meteorites classified as Eucrite-melt breccia. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 2 Nov 2020 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13434 (NWA 13434) (Northwest Africa) Purchased: 2020 February Classification: HED achondrite (Eucrite, melt breccia) History: The meteorite was purchased from a Morrocan dealer at the mineral show in Munich, Germany. Physical characteristics: Dark grayish rock without fusion crust. Petrography: The meteorite is a melt breccia predominantly composed of large up to 700 µm sized exsolved pyroxene grains set into a feldspar-dominated matrix. Pyroxenes are partly to completely recrystallized and often display mottled compositional zoning. In recrystallized regions feldspar typically shows fibrous textures indicative for crystallization from a melt. No lithic clasts have been found. Minor phases include silica, chromite, FeS, and zircon. No metallic iron has been found. Some regions show brownish staining due to terrestrial weathering; secondary barite is present. Geochemistry: low-Ca pyroxene: Fs57.6±1.8Wo4.1±1.6 (Fs55.0-60.4Wo1.9-6.6, n=17, FeO/MnO=27-31); Ca-pyroxene: Fs25.6±0.6Wo43.7±0.6 (Fs24.9-27.2Wo41.6-44.4, n=18, FeO/MnO=26-34); calcic plagioclase: An93.0±0.7 (An91.8-94.2, n=14) | ||||||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
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Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) Kuntz: Fabien Kuntz, France; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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