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Northwest Africa 8509 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 8509 This is an OFFICIAL meteorite name. Abbreviation: NWA 8509 Observed fall: No Year found: 2014 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 569 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 14 Sep 2014 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 103:
Northwest Africa 8509 (NWA 8509) (Northwest Africa) Purchased: March 2014 Classification: HED achondrite (Eucrite) Petrography: The meteorite displays a dark grayish to almost black interior and is heavily brecciated. Eucritic clasts and fine-grained matrix are dominantly composed of exsolved pyroxene and calcic plagioclase. Minor phases are SiO2 polymorphs and chromite. Wide regions of the rock appear to be shock melted and partly recrystallized. Pairing with NWA 8036 seems likely. Geochemistry: low-Ca pyroxene: Fs49.1±8.3Wo3.6±1.1 (Fs35.9-59.7Wo2.2-5.6, n=21), FeO/MnO=27-35; Ca-pyroxene: Fs25.8±2.9Wo40.6±1 (Fs22.8-30.7Wo38.7-42.1, n=12), FeO/MnO=27-34; calcic plagioclase: An90.5±0.5 (An89.6-91.4, n=20) | ||||||||||||||||||||||||||||
Data from: MB103 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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography: |
Statistics: This is 1 of 8890 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |