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Northwest Africa 11834 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11834 This is an OFFICIAL meteorite name. Abbreviation: NWA 11834 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 364 approved meteorites classified as Howardite. [show all] Search for other: Achondrites, HED achondrites, and Howardites | ||||||||||||||||||||||||||||
Comments: | Approved 4 Jul 2018 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 107:
Northwest Africa 11834 (NWA 11834) (Northwest Africa) Purchased: 2018 Classification: HED achondrite (Howardite) History: The meteorite was purchased from a local meteorite dealer in Morocco. Physical characteristics: Dark greyish individual without fusion crust. Petrography: The meteorite is a polymict breccia composed of mineral and lithic clasts (basaltic and impact melt clasts) set into a finer grained clastic matrix. Main minerals are exsolved pyroxene, up to 3 mm sized diogenetic orthopyroxene (about 15%) and calcic plagioclase. Minor phases include silica, chromite, ilmenite, barite, FeS, and metallic Fe. It contains abundant shock melt veins. Geochemistry: pyroxene host to augite lamellae: Fs59.2±0.9Wo3.9±1.2 (Fs58.0-60.5Wo2.1-6.6, n=15, FeO/MnO=31-35); Ca-pyroxene: Fs15.8±6.2Wo43.4±1.2 (Fs11.7-29.0Wo40.2-44.5, n=14, FeO/MnO=21-38); diogenitic pyroxene: Fs32.4±0.2Wo2.2±0.1 (Fs31.8-32.6Wo2.2-2.5, n=12, FeO/MnO=29-34); calcic plagioclase: An87.4±2.5 (An82.7-90.2, n=16) | ||||||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
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Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, in preparation (2018)
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Geography: |
Statistics: This is 1 of 6631 approved meteorites from (Northwest Africa) (plus 2036 unapproved names) |