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Northwest Africa 16165
Basic information Name: Northwest Africa 16165
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16165
Observed fall: No
Year found: 2023
Country: (Northwest Africa)
Mass:help 664 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2023)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 605 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 3 Sep 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 16165 (NWA 16165)

(Northwest Africa)

Purchased: 2023 Apr

Classification: HED achondrite (Eucrite)

History: The meteorite was purchased from a meteorite dealer in Morocco.

Physical characteristics: Grayish rock partly covered with fusion crust.

Petrography: Coarse-grained unbrecciated basalt with interspersed finer grained metamorphic regions often displaying 120 degree grain boundaries between adjoining crystals. Main minerals are exsolved pyroxene and calcic plagioclase grains measuring up to 1 mm in coarse- and up to 300 µm in fine-grained lithologies. Minor phases include silica, chromite, ilmenite, zircon, and FeS. No metallic iron detected.

Geochemistry: low-Ca pyroxene host to exsolution lamellae: Fs56.9±0.2Wo5.9±0.1 (Fs56.5-57.1Wo5.8-6.0, FeO/MnO=28-30, n=7); Ca-pyroxene exsolution lamellae: Fs28.2±0.2Wo41.3±0.2 (Fs27.9-28.5Wo41.1-41.7, FeO/MnO=28-33, n=7); calcic plagioclase: An89.7±1.9 (An85.2-91.1, n=7).

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2023 Apr
Mass (g):664
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):56.9; 28.2
Wollastonite (mol%):5.9; 41.3
Classifier:A. Greshake, MNB
Type spec mass (g):22
Type spec location:MNB
Main mass:David Göttlich
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 112, in preparation (2023)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9772 approved meteorites from (Northwest Africa) (plus 1862 unapproved names)

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