Meteoritical Bulletin: Entry for Northwest Africa 11976

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Northwest Africa 11976

Basic information

Name: Northwest Africa 11976
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11976
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass: 78.6 g

Classification
history:

Meteoritical Bulletin:	MB 107	(2018)	LL3
Recommended:			LL3 [explanation]

This is 1 of 365 approved meteorites classified as LL3. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 2 Sep 2018

Writeup

help

Writeup from MB 107:

Northwest Africa 11976 (NWA 11976)

(Northwest Africa)

Purchased: Nov 2017

Classification: Ordinary chondrite (LL3)

History: Purchased by Li Bofang from a Morrocan who got a language lecture in Beijing in Nov. 2017.

Physical characteristics: 78.6 g stone covered by >80% dark, weak, shiny fusion crust; non-crusted surface is strong eroded and presents well-defined chondrules.

Petrography: (R. Bartoschewitz, Bart, B. Li, Beijing) cut surface shows poorly recrystallized matrix with well-defined light- to dark-gray and olive-gray chondrules of 0.4-2.0 mm and very few tiny metal specks.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa_21.8±10.5(n=28); pyroxene Fs_11.4±9.0Wo_0.9±0.8(n=15); Ca-pyroxene Fs_26.9Wo_73.1(n=1). Kamacite: Ni=5.0-6.3, Co=1.6-1.8 wt.% (n=6); tetrataenite, troilite. Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10^-9 m³/kg) = 3.95.

Classification: ordinary chondrite (LL3)

Specimens: 15.8 g on deposit at Kiel, B. Li holds the main mass and 4.4 g with Bart.

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	Beijing
Date:	P Nov 2017
Mass (g):	78.6
Pieces:	1
Class:	LL3
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	21.8±10.5 (n=28)
Ferrosilite (mol%):	11.4±9.0 (n=15)
Wollastonite (mol%):	0.9±0.8
Magnetic suscept.:	3.95
Classifier:	R. Bartoschewitz, B. Li
Type spec mass (g):	15.8
Type spec location:	Kiel
Main mass:	Li Bofang, Beijing
Finder:	anonymous
Comments:	NWA-LB004; submitted by R. Bartoschewitz

Institutions
and collections

Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019)
Beijing: Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China (institutional address; updated 16 Oct 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462

Find references in NASA ADS:
Find references in Google Scholar:

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7688 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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