Meteoritical Bulletin: Entry for Northwest Africa 5756

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Northwest Africa 5756

Basic information

Name: Northwest Africa 5756
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5756
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass: 40 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	LL3-4
Recommended:			LL3-4 [explanation]

This is 1 of 2 approved meteorites classified as LL3-4. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 26 Jan 2017

Writeup

Writeup from MB 106:

Northwest Africa 5756 (NWA 5756)

(Northwest Africa)

Purchased: 2008 Jun 16

Classification: Ordinary chondrite (LL3-4)

History: Purchased from a Moroccan dealer at the meteorite fair in Ensisheim, France.

Petrography: (K. Metzler, IfP) Genomict breccia, consisting of unequilibrated (LL3) clasts and clasts with unequilibrated low-Ca pyroxene and equilibrated olivine (LL4), embedded in related fine-grained clastic material.

Geochemistry: Mineral chemistry of type 3 clasts: Fa_27.0±8.2(Fa_11.0-38.8; n=22); Fs_14.6±7.5(Fs_4.3-31.9; n=19); Mineral chemistry of type 4 clasts: Fa_31.7±1.2(Fa_30.5-33.9; n=6); Fs_18.3±5.7(Fs_13.1-30.1; n=8)

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Ensisheim
Date:	P 2008 Jun 16
Mass (g):	40
Pieces:	1
Class:	LL3-4
Shock stage:	S2
Weathering grade:	W1
Fayalite (mol%):	27.0±8.2; 31.7±1.2
Ferrosilite (mol%):	14.6±7.5; 18.3±5.7
Classifier:	A. Bischoff, IfP
Type spec mass (g):	8.5
Type spec location:	IfP
Main mass:	anonymous
Comments:	Submitted by K. Metzler (IfP)

Institutions
and collections

IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)

Catalogs:

References:

Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7552 approved meteorites from (Northwest Africa) (plus 1969 unapproved names)

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