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Northwest Africa 13516 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13516 This is an OFFICIAL meteorite name. Abbreviation: NWA 13516 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: 546 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 136 approved meteorites classified as Eucrite-unbr. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 19 Nov 2020 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13516 (NWA 13516) (Northwest Africa) Purchased: 2020 Sep Classification: HED achondrite (Eucrite, unbrecciated) History: Purportedly found in the Adrar region, Algeria. Bought from a meteorite dealer in Tindouf, Algeria. Physical characteristics: Isometric individual without fusion crust. Petrography (K. Metzler, IfP): Unbrecciated coarse-grained basalt with ophitic to subophitic texture, consisting of about 60% pyroxene and 40% plagioclase. Pyroxene with augite exsolution lamellae (typical width 1-4 µm). Accessories are a silica polymorph, ilmenite, chromite, and traces of Ni-poor metal. Geochemistry: Mineral compositions and geochemistry: Composition of low-Ca pyroxene: Fs55.1±0.7 Wo3.2±0.3 (Fs54.1-56.3 Wo2.7-3.6); mean Fe/Mn (at.): 33.1; n=10. Composition of Ca-rich pyroxene (exsolution lamellae): Fs25.8±1.5Wo39.0±2.2 (Fs24.7-29.0Wo35.1-41.2); n=9. Composition of plagioclase: An88.3±1.3Or0.2±0.3 (An86.7-90.6Or0.0-0.5); n=10. Classification: Unbrecciated eucrite | ||||||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
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Institutions and collections |
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012) |
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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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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