Northwest Africa 16173

Basic information Name: Northwest Africa 16173

This is an OFFICIAL meteorite name.

Abbreviation: NWA 16173

Observed fall: No

Year found: 2023

Country: (Northwest Africa)

Mass:help 160 g

Classification

history:

Meteoritical Bulletin: MB 112 (2023) Lunar (feldsp. breccia)

Recommended: Lunar (feldsp. breccia) [explanation]

This is 1 of 334 approved meteorites classified as Lunar (feldsp. breccia). [show all]

Search for other: Lunar meteorites

Comments: Approved 29 Sep 2023

Writeuphelp

Writeup from MB 112:

Northwest Africa 16173 (NWA 16173)

(Northwest Africa)

Purchased: 2023 Mar

Classification: Lunar meteorite (feldspathic breccia)

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

Physical characteristics: Grayish rock lacking fusion crust.

Petrography: The meteorite is a fragmental breccia predominantly composed of up to 2.5 mm sized lithic clasts (anorthosites, noritic anorthosites, and melt clasts) plus up to 600 µm sized mineral fragments a fine-grained feldspathic matrix. Dominant minerals are anorthosite, olivine, low-Ca-pyroxene, pigeonite, and augite. Minor phases include fayalite, ilmenite, chromite, troilite, and rare FeNi metal.

Geochemistry: olivine: Fa20.6±0.1 (Fa20.5-20.8, FeO/MnO=79±4; n=7); zoned olivine: Fa27.5±1.5 (Fa26.1-29.7, FeO/MnO=90±9; n=7); ferroan olivine: Fa55.4±0.2 (Fa55.1-55.7, FeO/MnO=89±3; n=7); fayalite: Fa91.5±0.1 (Fa91.4-91.7, FeO/MnO=78±4; n=7); low-Ca pyroxene: Fs18.7±0.2Wo3.1±0.3 (Fs18.5-19.0Wo2.8-3.5, FeO/MnO=51±4, n=7); pigeonite: Fs39.6±1.0Wo16.2±0.6 (Fs38.6-41.8Wo15.5-17.6, FeO/MnO=55±4, n=7); augite: Fs17.3±0.3Wo43.0±0.3 (Fs16.8-17.7Wo42.6-43.6, FeO/MnO=50±2, n=7); calcic plagioclase: An96.3±0.4 (An95.9-97.3, n=7)

Data from:

MB112

Table 0

Line 0:

Place of purchase: Ouargla, Algeria

Date: P 2023 Mar

Mass (g): 160

Pieces: 1

Class: Lunar (feldsp. breccia)

Shock stage: high

Weathering grade: moderate

Fayalite (mol%): 20.6; 25.5; 45,4; 91.5

Ferrosilite (mol%): 18.7; 39.6; 17.3

Wollastonite (mol%): 3.1; 16.2; 43.0

Classifier: A. Greshake, MNB

Type spec mass (g): 24.4

Type spec location: MNB

Main mass: Said Yousfi

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: NASA ADS

Find references in Google Scholar: Google Scholar

Geography:

Coordinates: Unknown.

Statistics:

This is 1 of 9550 approved meteorites from (Northwest Africa) (plus 1872 unapproved names)

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Revision

history:

This lists important revisions made to data for this record.