Meteoritical Bulletin: Entry for Northwest Africa 13417

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Northwest Africa 13417

Basic information

Name: Northwest Africa 13417
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13417
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass: 350 g

Classification
history:

Recommended:

H3-6 [explanation]

This is 1 of 75 approved meteorites classified as H3-6. [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 1 Nov 2020

Writeup

help

Writeup from MB 109:

Northwest Africa 13417 (NWA 13417)

(Northwest Africa)

Purchased: 2012 Sep

Classification: Ordinary chondrite (H3-6)

History: Purchased by Blaine Reed in September 2012 from a Moroccan dealer at the Denver Show.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Most of this specimen consists of well-formed chondrules (apparent diameter 600±390 µm, N = 24) set in a finer grained matrix containing altered metal, troilite, chromite and apatite. One type 6 lithic clast (1 cm across) containing rare chondrule remnants is present in the studied thin section.

Geochemistry: Olivine (Fa_18.8±2.9, range Fa_16.8-23.8, N = 5; Cr₂O₃ in ferroan olivine (Fa_23.8-40.2) 0.01-0.11 wt.%, mean 0.05±0.04 wt.%, N = 5), low-Ca pyroxene (Fs_12.3±3.9Wo_1.2±1.3, range Fs_8.7-17.8Wo_0.3-3.0, N = 4), pigeonite (Fs_20.4Wo_10.1), subcalcic augite (Fs_21.1Wo_27.4), augite (Fs_13.0Wo_41.4). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 5.02.

Classification: Ordinary chondrite (H3-6 breccia).

Specimens: 24.7 g including one polished thin section at PSF; remainder with Mr. B. Reed.

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Denver
Date:	P 2012 Sep
Mass (g):	349.6
Pieces:	1
Class:	H3-6
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	26.2±11.3
Ferrosilite (mol%):	12.3±3.9
Wollastonite (mol%):	1.2±1.3
Magnetic suscept.:	5.02
Classifier:	A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):	24.7
Type spec location:	PSF
Main mass:	B. Reed
Comments:	Work name BR108; submitted by A. Irving

Institutions
and collections

PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)

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 7912 approved meteorites from (Northwest Africa) (plus 1974 unapproved names)

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