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Northwest Africa 4645
Basic information Name: Northwest Africa 4645
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4645
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 56.6 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  L(LL)3
Recommended:  L(LL)3    [explanation]

This is 1 of 14 approved meteorites classified as L(LL)3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 11 Jun 2012
Writeuphelp
Writeup from MB 100:

Northwest Africa 4645 (NWA 4645)

Northwest Africa

Purchased: 2006

Classification: Ordinary chondrite (L(LL)3)

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

Physical characteristics: One brownish fragment of 56.6 g partly covered with fusion crust.

Petrography: The meteorite is an unbrecciated chondrite with a fresh gray appearance in its interior. The chondrules are well defined and of large variation in the textural types. Olivine and pyroxene are unequilibrated. Mean chondrule size ~0.8 mm; meteorite has a high chondrule/matrix ratio and low metal content.

Geochemistry: Olivine Fa8.7-26.1; pyroxene Fs2.5-20.2.

Classification: Ordinary chondrite L(LL)3, S2, W1.

Specimens: 12.8 g plus one polished thin section are on deposit at MNB.

Data from:
  MB100
  Table 1
  Line 1202:
Place of purchase:Erfoud, Morocco
Date:P 2006
Mass (g):56.6
Pieces:1
Class:L(LL)3
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):17.1±6.8 (8.7-26.1, n=15)
Ferrosilite (mol%):10.5±7.7 (2.5-20.2, n=10)
Classifier:Ansgar Greshake, MNB
Type spec mass (g):12.8
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6781 approved meteorites from (Northwest Africa) (plus 2061 unapproved names)

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