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Northwest Africa 15690
Basic information Name: Northwest Africa 15690
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15690
Observed fall: No
Year found: 2018
Country: Morocco
Mass:help 884 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2024)  H6
Recommended:  H6    [explanation]

This is 1 of 6996 approved meteorites (plus 6 unapproved names) classified as H6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 11 Feb 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15690 (NWA 15690)

Morocco

Purchased: 2018

Classification: Ordinary chondrite (H6)

History: Purchased in 2022 by Mark Zalcik from Dean Bessey, who purchased it from a Moroccan dealer in Erfoud in 2018

Petrography: (C. Herd, UAb) Optical and microprobe examination of a polished thin section shows a brecciated texture of poorly defined chondrules, crosscut by numerous shock veins. Iron staining and alteration is prevalent. Olivine shows weak mosaicism and PFs.

Geochemistry: (C. Herd and A. Locock, UAb) Data obtained by EMP examination of carbon-coated thin section: Olivine Fa19.0±0.9 (n=20); Low-Ca Pyroxene Fs16.8±0.9Wo1.1±0.3 (n=8).

Classification: Ordinary chondrite, H6 breccia

Specimens: Type specimen of 31.2 g, including one thin section, is at UAb. Main mass with M. Zalcik.

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2018
Mass (g):884
Pieces:1
Class:H6
Shock stage:S4
Weathering grade:W3.3
Fayalite (mol%):19.0±0.9 (n=20)
Ferrosilite (mol%):16.8±0.9 (n=8)
Wollastonite (mol%):1.1±0.3 (n=8)
Classifier:C. Herd
Type spec mass (g):31.2
Type spec location:UAb
Main mass:M. Zalcik
Comments:Submitted by C. Herd
Institutions
   and collections
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
Bessey: Dean Bessey ,P.O. Box 40810, Glenfield, Auckland 1310 , New Zealand; Website (private address)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2118 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater)

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