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| Northwest Africa 13987 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 13987 This is an OFFICIAL meteorite name. Abbreviation: NWA 13987 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass:  1570 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 128 approved meteorites classified as CK4. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites | ||||||||||||||||||||||||||||||
| Comments: | Approved 21 Jun 2021 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 110:
Northwest Africa 13987 (NWA 13987) (Northwest Africa) Purchased: 2020 Classification: Carbonaceous chondrite (CK4) History: Purchased by Craig Zlimen from an Algerian meteorite dealer. Physical characteristics: Single stone, dark sandblasted exterior. Saw cut reveal numerous distinct chondrules set in a brown-fine-grained matrix. Scattered CAIs are visible throughout. Petrography: (C. Agee, UNM) This meteorite has primarily type-II porphyritic chondrules. Fine grained feldspar was observed throughout. Approximately 90% of the pyroxene is diopsidic, with low-Ca pyroxene being a minor phase. Ubiquitous chromium-bearing magnetite was detected throughout. Geochemistry: (A. Ross, UNM) Olivine Fa30.5±4.4, Fe/Mn=109±8, NiO=0.36±0.09 Cr2O3= 0.09±0.15 (wt%), n=7; diopside Fs4.0±5.1Wo41.8±5.5, n=5; magnetite Cr2O3=2.7±0.3 wt%. Classification: Carbonaceous chondrite CK4. CK based on the presence of chromium-bearing magnetite and absence of metal. Presence of fine-grained recrystallized plagioclase suggests type 4 rather than type 3. Specimens: 62 g including a probe mount on deposit at UNM, Craig Zlimen holds the main mass. | ||||||||||||||||||||||||||||||
| Data from: MB110 Table 0 Line 0: |
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| Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) |
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| Catalogs: |
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| References: | Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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| Photos: |
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| Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
| Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
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| Revision history: |
This lists important revisions made to data for this record.
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