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NORTHWEST AFRICA 16449(NWA 16449)CVOX3CARBONACEOUS METEORITEDISCOVERED IN APRIL 2023IN MALI 🇲🇱20GRAMS
This meteorite is rich in calcium-aluminum inclusions (CAIs).
Calcium-aluminum-rich inclusions (CAIs) from chondritic meteorites are the oldest objectsformed in the Solar System.
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OFFICIAL CLASSIFICATION DATA SOURCE:
THE METEORITICAL SOCIETY
INTERNATIONAL SOCIETY FOR METEORITICS AND PLANETARY SCIENCE
LUNAR AND PLANETARY INSTITUTE
METEORITICAL BULLETIN DATABASE
Northwest Africa 16449Basic informationName:Northwest Africa 16449
This is an OFFICIAL meteorite name.
Abbreviation:NWA 16449
Observed fall:No
Year found:2023
Country:Mali
Mass:585 is 1 of 53 approved meteorites classified as CVox3
Comments:Approved 14 Feb 2024WriteupWriteup from MB 113:
Northwest Africa 16449(NWA 16449)
Mali
Purchased: 2023 Apr
Classification: Carbonaceous chondrite (CVox3)
History: Purchased by Mbark Arjdal in April 2023 from a Malian dealer.
Petrography: A. Irving,UWS, and J. Boesenberg,BrownU) Well-defined unequilibrated chondrules (apparent diameter 990±480 µm, N = 26) containing devitrified glass, plus irregularly-shaped, very fine-grained and some much coarser-grained CAI, are set in a fine-grained matrix (~40 vol.%, opaque in thin section) containing pentlandite, Cr-bearing magnetite and chromite, but no metal. Phases identified in one very large CAI (~7 × 3.5 mm) include gehlenite, spinel, perovskite and anorthite. Some thin veins of secondary calcite are present.
Geochemistry: Olivine (Fa38.5±35.1, range Fa0.6-95.2, N = 17), low-Ca pyroxene (Fs1.4±0.7Wo1.9±1.3, range Fs09-2.2Wo1.1-3.8, N = 4), subcalcic diopside (Fs1.8Wo32.3), diopside (Fs1.0Wo43.2), Al-diopside (Fs0.5±0.3Wo51.3±1.5, range Fs0.3-0.9Wo49.7-52.7, Al2O33.8-6.7 wt/%, N = 3), plagioclase (An79.8-88.9Or0.0, N = 3), magnetite (Cr2O30.4-1.5 wt.%, N = 7).
Classification: Carbonaceous chondrite (CVox3).
Specimens: 24.4 g including one polished thin section atUWB; remainder with Mr. M. Arjdal.
Data from:
MB113
Table 0
Line 0:Place of purchase:MaliDate:P 2023 AprMass (g):585Pieces:manyClass:CVox3Shock stage:S2Weathering grade:lowFayalite (mol%):38.5±35.1Ferrosilite (mol%):1.4±0.7Wollastonite (mol%):1.9±1.3Classifier:A. Irving, UWS, and J. Boesenberg, BrownUType spec mass (g):24.4Type spec location:UWBMain mass:M. ArjdalComments:Work name Arj ZM 854; submitted by A. IrvingInstitutions
and collectionsUWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UBS: 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 Meteoritical Bulletin, no. 113, in preparation (2024)
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