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Northwest Africa 16122
Basic information Name: Northwest Africa 16122
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16122
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 21 kg
Meteoritical Bulletin:  MB 112  (2024)  H5
Recommended:  H5    [explanation]

This is 1 of 11801 approved meteorites (plus 23 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 21 Aug 2023
Writeup from MB 112:

Northwest Africa 16122 (NWA 16122)

(Northwest Africa)

Purchased: 2016

Classification: Ordinary chondrite (H5)

History: Purchased in 2016 by Dean Bessey from a mineral dealer in Erfoud, Morocco

Petrography: (K. Metzler, IfP) Equilibrated ordinary chondrite with clearly visible chondrules and chondrule fragments. Secondary feldspar grains are mostly <50 µm. High amounts of Fe-Ni metal, almost completely oxidized by terrestrial weathering.

Geochemistry: Mineral compositions and geochemistry: Mean olivine composition: Fa18.5±0.3 (Fa18.1-18.8; n=11); mean low-Ca pyroxene composition: Fs16.5±0.4 Wo1.1±0.1 (Fs15.7-17.2Wox0.9-1.4; n=10).

Classification: H chondrite based on mineral chemistry. Petrologic type 5 due to the equilibrated state of olivine and pyroxene and grain size of secondary plagioclase.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2016
Mass (g):21000
Shock stage:C-S1
Weathering grade:W4
Fayalite (mol%):18.5±0.3
Ferrosilite (mol%):16.5±0.4
Wollastonite (mol%):1.1±0.1
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Dean Bessey, Brisbane, Australia
Comments:Submitted by K. Metzler, IfP
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Bessey: Dean Bessey ,P.O. Box 40810, Glenfield, Auckland 1310 , New Zealand; Website (private address)
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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     This is 1 of 9790 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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