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Northwest Africa 15313
Basic information Name: Northwest Africa 15313
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15313
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 2.1 kg
Classification
  history:
Recommended:  H4    [explanation]

This is 1 of 6388 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 1 Oct 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15313 (NWA 15313)

(Northwest Africa)

Purchased: 2021 Aug

Classification: Ordinary chondrite (H4)

History: Purchased by Jason Whitcomb in August 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed equilibrated chondrules containing devitrified glass are set in a relatively coarse grained matrix containing extensively altered kamacite, troilite, chromite, merrilite and secondary calcite, but no plagioclase. Veinlets of secondary Fe oxides are present.

Geochemistry: Olivine (Fa18.6±0.2, range Fa18.2-18.9, N = 8), low-Ca pyroxene (Fs16.4±0.5Wo1.1±0.1, range Fs15.4-16.9Wo1.0-1.3, N = 7).

Classification: Ordinary chondrite (H4).

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

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021 Aug
Mass (g):2100
Pieces:1
Class:H4
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):18.6±0.2
Ferrosilite (mol%):16.4±0.5
Wollastonite (mol%):1.1±0.1
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):24.7
Type spec location:PSF
Main mass:J. Whitcomb
Comments:Work name JW-88; 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)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
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 8745 approved meteorites from (Northwest Africa) (plus 1880 unapproved names)

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