|
Northwest Africa 14998 | |||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 14998 This is an OFFICIAL meteorite name. Abbreviation: NWA 14998 Observed fall: No Year found: 2021 Country: (Northwest Africa) Mass: 404 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 19 approved meteorites classified as LL3.15. [show all] Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||||
Comments: | Approved 6 Aug 2022 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 111:
Northwest Africa 14998 (NWA 14998) (Northwest Africa) Purchased: 2021 Classification: Ordinary chondrite (LL3.15) History: Purchased by Shun-Chung Yang and Juan Chen in 2021 from a dealer in Tindouf, Algeria. Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed, closely packed unequilibrated chondrules (apparent diameter 880±420 µm, N = 25) containing both glass and devitrified glass are set in a fine grained matrix containing stained kamacite, chromite and troilite. Geochemistry: Olivine (Fa19.8±11.2, range Fa0.8-41.3, N = 18; Cr2O3 in ferroan olivine 0.00-0.67 wt.%, mean 0.16±0.16 wt.%, N = 32), low-Ca pyroxene (Fs18.4±10.9Wo1.5±1.0, range Fs3.1-43.4Wo0.3-3.0, N = 12), pigeonite (Fs24.7Wo6.6), subcalcic augite (Fs9.4Wo36.6). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.07. Classification: Ordinary chondrite (LL3.15). Petrologic subtype based on mean and standard deviation of Cr2O3 contents in ferroan olivine per Figure 15 in Grossman and Brearley (2005). Specimens: 25.2 g including one polished thin section at UWB; remainder with Mr. S.-C. Yang and Mr. J. Chen. | ||||||||||||||||||||||||||||||||
Bibliography: |
| ||||||||||||||||||||||||||||||||
Data from: MB111 Table 0 Line 0: |
|
||||||||||||||||||||||||||||||||
Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024) |
||||||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||||||
References: | Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
| ||||||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||||||
Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
| ||||||||||||||||||||||||||||||||
Revision history: |
This lists important revisions made to data for this record.
|