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Northwest Africa 14529
Basic information Name: Northwest Africa 14529
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14529
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 53.2 g
Classification
  history:
Recommended:  Iron, ungrouped    [explanation]

This is 1 of 143 approved meteorites (plus 1 unapproved name) classified as Iron, ungrouped.   [show all]
Search for other: Iron meteorites, Metal-rich meteorites, and Ungrouped irons
Comments: Approved 8 May 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14529 (NWA 14529)

(Northwest Africa)

Purchased: 2020 Mar

Classification: Iron meteorite (ungrouped)

Petrography: (J. Gattacceca, CEREGE) The etched section shows a plessitic octahedrite structure with remnants of fine scale Widmanstätten patterns (50 µm bandwidth). Veins of swathing kamacite, 100 µm thick, crosscut the sample. Rounded mm sized silicate inclusion are found, consisting of pyroxene, plagioclase and olivine, in decreasing amount. Plagioclase shows lobate contacts with pyroxene and olivine. Chromite is present as 50 µm grains.

Geochemistry: (H. Pourkhorsandi and V. Debaille, ULB): Composition of the metal (ICP-MS) is Co=0.42±0.01, Ni=10.41±0.07 (both in wt% ± 1 sigma), Cr=5.5±0.1, Cu=247±2, Ga=16.9±1.1, Ge=3.9±0.6, As=10.0±0.4, Mo=3.83±0.07, Pd=3.96±0.08, W=0.57±0.06, Ir=2.4±0.3, Au=0.77±0.05 (all in ppm ± 1 sigma). Oxide compositions (EPMA, J. Gattacceca): Olivine Fa20.8, FeO/MnO = 43.0 (n=2); Low-Ca pyroxene Fs17.9Wo2.4, FeO/MnO = 26.8 (n=2); Plagioclase An11.6Ab83.0Or5.4 (n=2); Chromite Cr# 0.82.

Classification: Iron meteorite (ungrouped). Although the metal metal composition is reminiscent of IIE irons, the Ge content is lower than in IIE irons. The silicate composition is also different from that in IIE irons, and similar to the silicate composition in H chondrites (see figure 3 in Schrader et al., 2017).

Specimens: Type specimen at CEREGE. Main mass with Kuntz.

Bibliography:
  • Schrader D. L., McCoy T. J. and Gardner-Vandy K. (2017) Relict chondrules in primitive achondrites: Remnants from their precursor parent bodies. Geochimica et Cosmochimica Acta 205, 295–312. (link)
Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2020 Mar
Mass (g):53.2
Pieces:1
Class:Iron, ungrouped
Weathering grade:minimal
Fayalite (mol%):20.8 (n=2)
Ferrosilite (mol%):17.9 (n=2)
Wollastonite (mol%):2.4
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):11.2
Type spec location:CEREGE
Main mass:Kuntz
Finder:anonymous
Comments:work name K494; submitted by Jérôme Gattacceca
Institutions
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
Kuntz: Fabien Kuntz, France; Website (private address)
ULB: Université libre de Bruxelles Avenue Franklin Roosevelt 50 - 1050 Bruxelles, Belgium (institutional address; updated 27 Sep 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8636 approved meteorites from (Northwest Africa) (plus 1884 unapproved names)

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