Meteoritical Bulletin: Entry for Northwest Africa 4643

MetSoc Home Publications Contacts

Search the Meteoritical Bulletin Database
Last update: 3 Jun 2023
Search for:	Search type:	Search limits:	Display:	Publication:
Names Text Places Classes Years	Contains Starts with Exact Sounds like	NonAntarctic Falls Non-NWAs Has strewnfield		What's new in the last:
Include past classifications in search		Has photo	Limit to approved meteorite names
Search text:

Northwest Africa 4643

Basic information

Name: Northwest Africa 4643
This is an OFFICIAL meteorite name.
Abbreviation: NWA 4643
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass: 995 g

Classification
history:

Meteoritical Bulletin:	MB 101	(2012)	EL6
Recommended:			EL6 [explanation]

This is 1 of 130 approved meteorites classified as EL6. [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites

Comments:

Approved 9 Nov 2012

Writeup

Writeup from MB 101:

Northwest Africa 4643 (NWA 4643)

(Northwest Africa)

Purchased: 2006

Classification: Enstatite chondrite (EL6)

History: The meteorite was found by an anonymous finder in northwest Africa and bought by the main mass holder in Erfoud, Morocco.

Physical characteristics: Two brownish fragments without fusion crust weighing together 995.3 g.

Petrography: The meteorite displays a recrystallized texture of dominantly almost pure enstatite; no chondrules found in the section studied. Sulfides and FeNi metal are heavily oxidized.

Geochemistry: Pyroxene, Fs_0.1-0.7.The few unweathered FeNi metal shows ~0.5 wt% Si.

Classification: Enstatite chondrite (EL6); low degree of shock, high degree of weathering.

Specimens: 21.4 g plus one polished thin section are on deposit at MNB.

Data from:
  MB101
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2006
Mass (g):	995.3
Pieces:	2
Class:	EL6
Shock stage:	low
Weathering grade:	high
Ferrosilite (mol%):	0.3 (0.1-0.7)
Classifier:	A. Greshake, MNB
Type spec mass (g):	21.4
Type spec location:	MNB
Main mass:	Hanno Strufe
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015

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

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

Direct link to this page