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Northwest Africa 13785
Basic information Name: Northwest Africa 13785
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13785
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 35 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 280 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 28 Mar 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13785 (NWA 13785)

(Northwest Africa)

Purchased: 2021

Classification: Lunar meteorite (feldspathic breccia)

History: The meteorite was purchased by the main mass holder from a dealer in Erfoud, Morocco.

Physical characteristics: Dark-grayish rock without fusion crust.

Petrography: The meteorite displays a dark-grayish interior and is a polymict breccia predominantly composed of lithic and mineral clasts cemented by abundant shock melted and partly vesicular matrix. Lithic clasts are gabbroic and impact melts clasts up to 5 mm in size. Dominant minerals are pigeonite, augite, olivine, and calcic plagioclase. Minor phases are ilmenite and FeS. In the matrix flow textures are abundant.

Geochemistry: pigeonite: Fs26.6±2.2Wo10.4±3.7 (Fs23.3-30.8Wo5.5-19.0, FeO/MnO=50±3, n=16); augite: Fs22.1±2.2Wo35.3±1.6 (Fs20.0-26.3Wo33.4-37.9, FeO/MnO=49±5, n=5); olivine: Fa36.3±0.2, (Fa36.0-36.6, FeO/MnO=93±8, n=12); plagioclase: An97.4±1.1 (An96.1-98.7, n=10)

Classification: Lunar (feldsp. breccia)

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2021
Mass (g):35
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):36.3
Ferrosilite (mol%):26.6; 22.1
Wollastonite (mol%):10.4; 35.3
Classifier:A. Greshake, MNB
Type spec mass (g):7.1
Type spec location:MNB
Main mass:Philippe Schmitt-Kopplin
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. 110, in preparation (2021)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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