header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 18 Aug 2019
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 8770
Basic information Name: Northwest Africa 8770
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8770
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 7.5 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 191 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 13 Feb 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 8770 (NWA 8770)

(Northwest Africa)

Purchased: 2014

Classification: Martian meteorite (Shergottite)

History: The meteorite was bought 2014 at a mineral fair in Munich, Germany.

Physical characteristics: Tiny greenish-grayish individual partly covered with fusion crust.

Petrography: The meteorite displays a Shergotty-like intersertal texture of predominantly complex-zoned prismatic clinopyroxene and lath-shaped grains of intermediate plagioclase that has been converted into maskelynite during shock metamorphism. Accessory minerals include ilmenite, ulvöspinel, pyrrhotite, and merrillite; shock-melt pockets are abundant

Geochemistry: pigeonite: Fs44.7±11.6Wo13.9±2.1 (Fs29.6-61.3Wo11-18.6, n=16, FeO/MnO=29-40); augite: Fs29±8.2Wo32.7±2 (Fs20.1-50.5Wo28.9-36.6, n=24, FeO/MnO=25-41); maskelynite: An51.5±4.2Or2.2±0.9 (An42-55.4Or1.6-4.6, n=16)

Classification: Pyroxene-phyric shergottite

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Munich, Germany
Date:P 2014
Mass (g):7.5
Pieces:1
Class:Martian (shergottite)
Shock stage:S5
Weathering grade:moderate
Ferrosilite (mol%):44.7; 29
Wollastonite (mol%):13.9; 32.7
Classifier:A. Greshake, MNB
Type spec mass (g):1.5
Type spec location:MNB
Main mass:Harald Stehlik
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Stehlik: Harald Stehlik, 1220 Wien, Austria (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6877 approved meteorites from (Northwest Africa) (plus 2037 unapproved names)

Direct link to this page