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Northwest Africa 13583 | |||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13583 This is an OFFICIAL meteorite name. Abbreviation: NWA 13583 Observed fall: No Year found: 2019 Country: Tunisia Mass: ![]() | ||||||||||||||||||||||||
Classification history: |
This is 1 of 589 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
Comments: | Approved 19 Nov 2020 | ||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 109:
Northwest Africa 13583 (NWA 13583) Tunisia Purchased: Jul. 2019 Classification: HED achondrite (Eucrite) History: Purchased by Bo Zhang in Jul. 2019 from an anonymous dealer. Physical characteristics: A single large stone with a gray fusion crust and a few holes. Petrography: The monomict brecciated specimen is composed dominantly of subhedral pyroxene and subhedral or lath-shaped plagioclase up to 0.5 mm. Pyroxene is extensively exsolved with µm-sized (<1 to 10 µm) lamellae. Accessory minerals include ilmenite, troilite and silica. Impact melt veins are present. Geochemistry: Plagioclase (An85.6-97.6Or0.1-1.3, n=10), low-Ca pyroxene (Fs61.4-65.6Wo1.4-5.8, FeO/MnO=31.6-37.0, n=8), Ca-rich pyroxene (Fs28.3-41.8Wo31.7-42.5, FeO/MnO=29.4-33.0, n=8). Classification: The brecciated texture, calcic plagioclase, relatively homogeneous composition of pyroxene are consistent with monomict eucrites. | ||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
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Institutions and collections |
PMO: Purple Mountain Observatory, Nanjing, China (institutional address; updated 16 Dec 2011) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Photos: |
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Geography:![]() |
Statistics: This is 1 of 81 approved meteorites from Tunisia |