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Northwest Africa 15767 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15767 This is an OFFICIAL meteorite name. Abbreviation: NWA 15767 Observed fall: No Year found: 2022 Country: (Northwest Africa) Mass: 2.7 kg | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 3 approved meteorites classified as L5-7. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 19 Mar 2023 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 112:
Northwest Africa 15767 (NWA 15767) (Northwest Africa) Purchased: 2022 Dec Classification: Ordinary chondrite (L5-7) History: Purchased by S. Crivello and I. Pardini from a Moroccan dealer Petrography: (K. Metzler, IfP) Ordinary chondrite breccia, consisting of chondritic lithic clasts of petrologic types 5 and 7, embedded in a fine-grained clastic matrix of related debris. Type 5 clasts wih clearly visible chondrules and secondary feldspar grains mostly <50 µm. Geochemistry: Mineral compositions and geochemistry: Type 5 clasts: mean olivine composition Fa24.0±0.4 (Fa23.5-24.4; n=4); mean low-Ca pyroxene composition Fs19.9±0.1 Wo1.7±0.2 (Fs19.8-20.1Wo1.5-1.8; n=3). Type 7 clasts: mean olivine composition: Fa23.5±0.3 (Fa23.2-23.9; n=5); mean low-Ca pyroxene composition Fs19.7±0.3Wo2.4±0.3 (Fs9.4-20.1Wo1.9-2.7; n=7); mean CaO concentration in low-Ca pyroxene: 1.2±0.2 (1.0-1.4) wt%. Classification: L chondrite based on mineral chemistry. Type 5 clasts based on the equilibrated state of olivine and pyroxene, and grain size of secondary plagioclase. Type 7 clasts with mean CaO concentration in low-Ca pyroxene above the limit value of 1.0 wt% (Tait et al., 2014). | ||||||||||||||||||||||||||||||
Bibliography: |
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Data from: MB112 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. 112, in preparation (2023)
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Photos: |
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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