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Northwest Africa 10421
Basic information Name: Northwest Africa 10421
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10421
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 498 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  R6
Recommended:  R6    [explanation]

This is 1 of 13 approved meteorites classified as R6.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 14 Dec 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 10421 (NWA 10421)

(Northwest Africa)

Purchased: 2015

Classification: Rumuruti chondrite (R6)

History: Purchased by Adam Aaronson in Morocco, 2015.

Physical characteristics: Fusion crusted exterior. Broken surface reveals dark-gray interior with some small reflective opaque grains.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows and unbrecciated texture with rare relict chondrules. Fe-Ni sulfide, troilite, Ti-rich Cr-spinel, and phosphates observed. There is an overabundance of high-Ca pyroxene to low-Ca pyroxene. Scattered plagioclase with some grains up to 150 μm present.

Geochemistry: (C. Agee and N. Muttik, UNM) Olivine Fa39.6±0.2, Fe/Mn=84±3, NiO=0.20±0.08 (wt%), n=12; low-Ca pyroxene Fs28.5±2.5Wo1.3±0.3, Fe/Mn=55±3, n=4; high-Ca pyroxene Fs11.9±0.5Wo45.1±0.4, Fe/Mn=46±6, n=8.

Classification: Rumuruti chondrite (R6) based on Fa, Fe/Mn, and Ni content of olivine, presence of nickel bearing sulfide and Ti-rich spinel. The abundance of high-Ca pyroxene over low-Ca pyroxene is consistent with a metamorphosed (equilibrated) R-chondrite.

Specimens: 20.5 g including a probe mount on deposit at UNM, Aaronson holds the main mass.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015
Mass (g):497.6
Pieces:1
Class:R6
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):39.6±0.2
Ferrosilite (mol%):28.5±2.5, 11.9±0.5
Wollastonite (mol%):1.3±0.3, 45.1±0.4
Classifier:C. Agee, UNM
Type spec mass (g):20.5
Type spec location:UNM
Main mass:Aaronson
Comments:M1869; submitted by C. Agee
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7741 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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