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Northwest Africa 16536
Basic information Name: Northwest Africa 16536
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16536
Observed fall: No
Year found: 2023
Country: (Northwest Africa)
Mass:help 170 g
Classification
  history:
Recommended:  Angrite    [explanation]

This is 1 of 51 approved meteorites classified as Angrite.   [show all]
Search for other: Achondrites, Angrites
Comments: Approved 30 Mar 2024
Writeuphelp
Writeup from MB 113:

Northwest Africa 16536 (NWA 16536)

(Northwest Africa)

Purchased: 2023

Classification: Angrite

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

Physical characteristics: Many brownish fragments with some fusion crust.

Petrography: Protogranular aggregate predominantly composed of typically 150 to 200 µm sized calcic olivine, Al-Ti-augite, pleonaste spinel, and less abundant almost pure anorthite. Some cluster of more coarse-grained up to 500 µm sized minerals are present. Triple junctions between adjoning phases are frequently encountered. Minor phases include troilite and kamacite.

Geochemistry: olivine: Fa38.4±0.1Ln1.7±0.1 (Fa38.2-38.6Ln1.5-1.9, FeO/MnO=72-85, CaO: 1.2±0.1, n=7); Al-Ti-augite: Fs10.1±0.2Wo52.6±0.2 (Fs9.8-10.5Wo52.3-52.8, FeO/MnO=47-121, Al2O3: 9.2±0.3 wt.%, TiO2: 1.1±0.1 wt.%, n=7); anorthite: An98.7-99.3Ab0.7-1.2, n=7, pleonaste spinel: Fe/(Mg+Fe): 0.52±0.01, Al2O3: 58.3±0.4 wt%, n=7

Specimens: Mario Suppes holds 115 g and and Polandmet - Marcin Cimala holds 55 g.

Data from:
  MB113
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2023
Mass (g):170
Pieces:many
Class:Angrite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):38.4
Ferrosilite (mol%):10.1
Wollastonite (mol%):52.6
Classifier:A. Greshake, MNB
Type spec mass (g):20.5
Type spec location:MNB
Main mass:Mario Suppes and Polandmet - Marcin Cimala
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum f├╝r Naturkunde, Invalidenstra├če 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Polandmet: targoniny 30 43445 Dziegielow Poland, Poland; Website (institutional address; updated 7 May 2021)
Catalogs:
References: Published in Meteoritical Bulletin, no. 113, in preparation (2024)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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