SV-meteorites

NWA 15018 - Lunar (feldsp. breccia)

Slice. 0.8 grams

Northwest Africa 15018
Basic information Name: Northwest Africa 15018
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15018
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass: 1200 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)

This is 1 of 316 approved meteorites classified as Lunar (feldsp. breccia).
Comments: Approved 23 Jul 2022
Writeup
Writeup from MB 111:

Northwest Africa 15018 (NWA 15018)

(Northwest Africa)

Purchased: Apr 2022

Classification: Lunar meteorite (feldspathic breccia)

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

Physical characteristics: Many small grayish fragments without fusion crust.

Petrography: The meteorite displays a dark grayish interior and is a polymict breccia predominantly composed of up to 3 mm sized feldspathic and melt clasts plus mineral fragments consolidated by abundant finely recrystallized feldspathic matrix. Dominant minerals are olivine, augite, pigeonite, and calcic plagioclase. Minor phases are silica, ilmenite and FeS.

Geochemistry: olivine: Fa27.7±1.7 (Fa26.3-30.6, FeO/MnO=87±4, n=12); augite: Fs17.4±1.2Wo34.9±1.4 (Fs15.3-19.1Wo33.2-37.5, FeO/MnO=47±4, n=9); pigeonite: Fs25.3±1.6Wo9.3±2.2 (Fs23.0-28.4Wo5.9-13.3, FeO/MnO=53±5, n=11); calcic plagioclase: An97.9±0.1 (An97.6-98.1, n=10)

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Temara, Morocco
Date:P Apr 2022
Mass (g):1200
Pieces:many
Class:Lunar (feldsp. breccia)
Shock stage:moderate
Weathering grade:moderate
Fayalite (mol%):27.7
Ferrosilite (mol%):17.4; 25.3
Wollastonite (mol%):34.9; 9.3
Classifier:A. Greshake, MNB
Type spec mass (g):21.6
Type spec location:MNB
Main mass:Said Yousfi
Comments:Submitted by Ansgar Greshake

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