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Northwest Africa 11834
Basic information Name: Northwest Africa 11834
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11834
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 15 g
Classification
  history:
Recommended:  Howardite    [explanation]

This is 1 of 364 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 4 Jul 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11834 (NWA 11834)

(Northwest Africa)

Purchased: 2018

Classification: HED achondrite (Howardite)

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

Physical characteristics: Dark greyish individual without fusion crust.

Petrography: The meteorite is a polymict breccia composed of mineral and lithic clasts (basaltic and impact melt clasts) set into a finer grained clastic matrix. Main minerals are exsolved pyroxene, up to 3 mm sized diogenetic orthopyroxene (about 15%) and calcic plagioclase. Minor phases include silica, chromite, ilmenite, barite, FeS, and metallic Fe. It contains abundant shock melt veins.

Geochemistry: pyroxene host to augite lamellae: Fs59.2±0.9Wo3.9±1.2 (Fs58.0-60.5Wo2.1-6.6, n=15, FeO/MnO=31-35); Ca-pyroxene: Fs15.8±6.2Wo43.4±1.2 (Fs11.7-29.0Wo40.2-44.5, n=14, FeO/MnO=21-38); diogenitic pyroxene: Fs32.4±0.2Wo2.2±0.1 (Fs31.8-32.6Wo2.2-2.5, n=12, FeO/MnO=29-34); calcic plagioclase: An87.4±2.5 (An82.7-90.2, n=16)

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2018
Mass (g):15
Pieces:1
Class:Howardite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):59.2; 15.8; 32.4
Wollastonite (mol%):3.9; 43.4; 2.2
Classifier:A. Greshake, MNB
Type spec mass (g):3
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6631 approved meteorites from (Northwest Africa) (plus 2036 unapproved names)

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