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Northwest Africa 15109
Basic information Name: Northwest Africa 15109
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15109
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 584 g
Recommended:  Howardite    [explanation]

This is 1 of 427 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 1 Oct 2022
Writeup from MB 111:

Northwest Africa 15109 (NWA 15109)

(Northwest Africa)

Purchased: 2022

Classification: HED achondrite (Howardite)

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania, in April, 2022.

Physical characteristics: Two grayish fragments partly covered with fusion crust.

Petrography: The meteorite is a complex polymict breccia composed of fine-grained basaltic and dark impact melt clasts up to 2 mm in size and abundant mineral fragments set into a more fine-grained clastic and related matrix. Main minerals are up to 1.5 µm sized exsolved pyroxene, diogenetic orthopyroxene (about 15%), ferroan unexsolved low-Ca pyroxene, zoned low-Ca pyroxene, and calcic plagioclase. Minor phases include silica, chromite, ilmenite, and FeS. No metallic iron has been detected. Contains shock melt veins.

Geochemistry: low-Ca pyroxene host to augite exsolution lamellae: Fs59.4±0.3Wo1.4±0.2 (Fs58.9-60.0Wo1.1-1.8, FeO/MnO=26-31, n=7); augite exsolution lamellae: Fs28.7±0.8Wo39.1±0.9 (Fs26.9-29.7Wo37.9-40.8, FeO/MnO=26-30, n=7); diogenetic low-Ca pyroxene: Fs22.7±0.1Wo2.9±0.1 (Fs22.5-22.9Wo2.8-3.0, FeO/MnO=27-30, n=7); ferroan low-Ca-pyroxene: Fs33.8±0.2Wo2.3±0.1 (Fs33.6-34.1Wo2.2-2.5, FeO/MnO=26-28, n=7); zoned low-Ca-pyroxene: Fs32.7±2.5Wo1.9±0.2 (Fs28.6-36.0Wo1.5-2.1, FeO/MnO=29-34, n=7); calcic plagioclase: An90.6±0.5 (An89.7-91.2, n=7)

Data from:
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P 2022
Mass (g):584
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):59.4; 28.7; 22.7; 33.8; 32.7
Wollastonite (mol%):1.4; 39.1; 2.9; 2.3; 1.9
Classifier:A. Greshake, MNB
Type spec mass (g):24.5
Type spec location:MNB
Main mass:Salamu Ali
Comments:Submitted by Ansgar Greshake
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
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     This is 1 of 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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