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Northwest Africa 15849
Basic information Name: Northwest Africa 15849
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15849
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 974 g
Classification
  history:
Recommended:  Eucrite-br    [explanation]

This is 1 of 220 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 7 May 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15849 (NWA 15849)

(Northwest Africa)

Purchased: 2022 Dec

Classification: HED achondrite (Eucrite, brecciated)

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

Physical characteristics: Several fragments some of which partly covered with fresh fusion crust.

Petrography: Fragmental breccia composed of up to 5 mm sized basaltic and mineral clasts in a fine-grained clastic mineral matrix. Predominant minerals are up to 400 µm sized exsolved pyroxene and calcic plagioclase. Minor phases include silica, chromite, FeS, and ilmenite. No metallic iron detected.

Geochemistry: low-Ca pyroxene host to exsolution lamellae: Fs60.8±0.2Wo1.6±0.1 (Fs60.5-61.1Wo1.5-1.8, FeO/MnO=29-31, n=7); Ca-pyroxene exsolution lamellae: Fs26.4±0.8Wo43.4±1.1 (Fs25.4-28.2Wo41.3-44.6, FeO/MnO=28-31, n=7); calcic plagioclase: An88.6±2.6 (An85.3-91.9, n=7).

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2022 Dec
Mass (g):974
Pieces:several
Class:Eucrite-br
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):60.8; 26.4
Wollastonite (mol%):1.6; 43.4
Classifier:A. Greshake, MNB
Type spec mass (g):25.3
Type spec location:MNB
Main mass:David Goettlich
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:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9092 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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