Meteoritical Bulletin: Entry for Northwest Africa 8770

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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: 7.5 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	Martian (shergottite)
Recommended:			Martian (shergottite) [explanation]

This is 1 of 321 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all]
Search for other: Martian meteorites

Comments:

Approved 13 Feb 2015

Writeup

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: Fs_44.7±11.6Wo_13.9±2.1(Fs_29.6-61.3Wo_11-18.6, n=16, FeO/MnO=29-40); augite: Fs_29±8.2Wo_32.7±2(Fs_20.1-50.5Wo_28.9-36.6, n=24, FeO/MnO=25-41); maskelynite: An_51.5±4.2Or_2.2±0.9(An_42-55.4Or_1.6-4.6, 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; updated 24 Dec 2011)
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

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

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