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Northwest Africa 8198
Basic information Name: Northwest Africa 8198
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8198
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 60 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 344 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 28 Feb 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 8198 (NWA 8198)

(Northwest Africa)

Purchased: 04/2013

Classification: HED achondrite (Eucrite, polymict)

Physical characteristics: The single fragment is partly covered with shiny fusion crust and displays a light-grayish interior.

Petrography: It is composed of mineral and lithic clasts including basaltic and melt lithologies set into a more fine-grained clastic matrix. Mineral fragments are large mostly exsolved pyroxenes and calcic plagioclase. Minor phases include chromite, troilite, and SiO2 polymorphs.

Geochemistry: Low-Ca pyroxene: Fs57.3±2.1Wo4.8±2.5 (Fs53.3-59.7Wo1.7-9.5, n=13, FeO/MnO=30-32); Ca-pyroxene: Fs26.6±1.1Wo43.3±1.3 (Fs25-29.4Wo39.8-44.6, n=13, FeO/MnO=28-33); calcic plagioclase: An88.8±0.6 (An88-90.5, n=14)

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 04/2013
Mass (g):60
Pieces:1
Class:Eucrite-pmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):59.4-61.2, 27.4-30.1
Wollastonite (mol%):3.3-6.2, 41-43.3
Classifier:A. Greshake, MNB
Type spec mass (g):13.5
Type spec location:MNB
Main mass:Jürgen Nauber (JNMC)
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
JNMC: jnmczurich, P.O. Box 208, CH-8155 Niederhasli, Switzerland; Website (private address; updated 4 Feb 2014)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7101 approved meteorites from (Northwest Africa) (plus 2004 unapproved names)

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