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Northwest Africa 13443
Basic information Name: Northwest Africa 13443
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13443
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 153 g
Classification
  history:
Recommended:  CO3.1    [explanation]

This is 1 of 15 approved meteorites classified as CO3.1.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 10 Oct 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13443 (NWA 13443)

(Northwest Africa)

Purchased: 2020 Mar

Classification: Carbonaceous chondrite (CO3.1)

History: Purchased in March 2020 by Fabien Kuntz in Zagora.

Physical characteristics: Multiple fragments with fusion crust.

Petrography: (D. Sheikh, FSU) Small chondrules (120±60 µm, ~60 vol.%), isolated mineral fragments, and CAIs set in a mostly opaque matrix (~40 vol.%).

Geochemistry: Olivine (Fa17.9±15.9, range Fa0.4-40.9, FeO/MnO = 74±36, n=27), Cr2O3 in ferroan olivine (Cr2O3 wt% = 0.25±0.08, n=17), Low-Ca Pyroxene (Fs4.4±5.7Wo1.8±1.2, range Fs0.8-17.4Wo0.3-3.7, n=8).

Classification: Carbonaceous chondrite (CO3.1). Cr2O3 content of ferroan olivines suggest a low petrologic subtype that is approximately midway between Rainbow (CO3.2) and Colony (CO3.0) as reported in Grossman and Brearley (2005).

Specimens: 20.21 grams at UCLA; main mass with Kuntz.

Bibliography:
  • Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)
Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2020 Mar
Mass (g):153
Pieces:many
Class:CO3.1
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):17.9±15.9 (N=27)
Ferrosilite (mol%):4.4±5.7 (N=8)
Wollastonite (mol%):1.8±1.2 (N=8)
Magnetic suscept.:4.58
Classifier:D. Sheikh, FSU
Type spec mass (g):20.21
Type spec location:UCLA
Main mass:Fabien Kuntz
Comments:Submitted by Daniel Sheikh
Institutions
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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