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| Northwest Africa 15823 | |||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 15823 This is an OFFICIAL meteorite name. Abbreviation: NWA 15823 Observed fall: No Year found: 2022 Country: (Northwest Africa) Mass:  276 g | ||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 8 approved meteorites classified as Iron, IIE-an. [show all] Search for other: IIE irons, Iron meteorites, and Metal-rich meteorites | ||||||||||||||||||||||||||||
| Comments: | Approved 21 May 2024 | ||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 113:
Northwest Africa 15823 (NWA 15823) (Northwest Africa) Purchased: 2022 Mar Classification: Iron meteorite (IIE, anomalous) Petrography: (J. Gattacceca, CEREGE) Iron meteorite without Widmanstätten patterns (hexaedrite). Multiple well-developed Neumann band sets are present. Other shock features include veins of recrystallized metal. with grain size 10 µm. bounded by deformed Neumann bands showing a sigmoidal pattern at the contact with the vein. Rhabdites with 2 µm size are present. Angular enstatite to several mm is present. Geochemistry: Composition: Ni 5.90 wt% (XRF analyses). Trace elements (ICP-MS. V. Debaille. ULB): Co 4.57 mg/g. Ga 30.3 µg/g. As 17.8 µg/g. Ir 4.28 µg/g. Au 1.02 µg/g. Cu 149.1 µg/g. Cr 12.5 µg/g. Ge was not measured. Enstatite Fs0.31±0.30Wo0.86±0.20 (n=7). Classification: Iron meteorite (IIE anomalous). The anomalous properties are that Ni is low and Ga is high compared to other members of this group. Specimens: Type specimen at CEREGE, main mass with Kuntz. | ||||||||||||||||||||||||||||
| Data from: MB113 Table 0 Line 0: |
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| Institutions and collections |
CEREGE: CEREGE
BP 80
Avenue Philibert, Technopole de l'Arbois
13545 Aix-en-Provence Cedex 4
France, France (institutional address; updated 10 Jun 2023) Kuntz: Fabien Kuntz, France; Website (private address) ULB: Université libre de Bruxelles Avenue Franklin Roosevelt 50 - 1050 Bruxelles, Belgium (institutional address; updated 27 Sep 2018) |
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| References: | Published in Meteoritical Bulletin, no. 113, in preparation (2024)
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| Geography: |
Statistics: This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names) | ||||||||||||||||||||||||||||