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| Northwest Africa 15524 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 15524 This is an OFFICIAL meteorite name. Abbreviation: NWA 15524 Observed fall: No Year found: 2022 Country: (Northwest Africa) Mass:  1312 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 185 approved meteorites classified as CR2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites | ||||||||||||||||||||||||||||||
| Comments: | Approved 1 Apr 2023 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 112:
Northwest Africa 15524 (NWA 15524) (Northwest Africa) Purchased: 2022 Oct Classification: Carbonaceous chondrite (CR2) History: Reportedly found in 2021 in the area of In Salah, Algeria. Petrography: (K. Metzler, IfP) Unequilibrated chondrite, consisting of metal-bearing chondrules, chondrule fragments, and few CAIs, embedded in a fine-grained brownish matrix (~40 vol% matrix). The chondrule population is dominated by porphyritic type I chondrules, some of which contain Ca-rich plagioclase. A few type II chondrules were observed. Many type I chondrules are (multi-)layered, showing igneous rims and layers of metal beads. Apparent chondrule sizes are mostly between 400 and 1000 µm; a few chondrules with sizes up to 3 mm are present. The interchondrule matrix contains clusters of magnetite (platelets and framboids), indicative of aqueous alteration processes. Geochemistry: Mineral compositions and geochemistry: The mean olivine composition is Fa7.4±11.5 (Fa0.8-37.2; n=18); the mean low-Ca pyroxene composition is Fs3.1±1.4 Wo0.8±0.3 (Fs1.4-6.1 Wo0.3-1.3; n=15). Classification: CR2 chondrite based on chondrule size and texture, mineral chemistry, and occurrence of magnetite clusters in the interchondrule matrix. | ||||||||||||||||||||||||||||||
| 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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| References: | Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
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| Photos: |
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| Geography: |
Statistics: This is 1 of 9921 approved meteorites from (Northwest Africa) (plus 1838 unapproved names) | ||||||||||||||||||||||||||||||