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Northwest Africa 4522
Basic information Name: Northwest Africa 4522
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4522
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 949 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  LL3
Recommended:  LL3    [explanation]

This is 1 of 418 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 27 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 4522 (NWA 4522)

Northwest Africa

Purchased: Oct 2006

Classification: Ordinary chondrite (LL3)

Petrography: (K.Metzler, IfP) Genomict breccia, dominated by chondrules and chondrule fragments set in a fine-grained clastic matrix. Dark chondritic lithic clasts of petrologic type 3 (various subtypes) occur with sizes up to several cm. Many of these clasts show only small amounts of matrix. One fragment-rich melt clast found.

Geochemistry: (R. Pickard, BathO; K.Metzler, IfP) Olivine and pyroxene compositions were measured in two dark chondritic lithic clasts. One clast is of petrologic type <3.5 (Fa12.9±8.1, n=21; Fs9.8±8.3, n=31) the other is of petrologic type 3.5 (Fa19.7±8.8, n=26; Fs13.1±8.8, n=27). The olivine and pyroxene statistics for the bulk sample (Fa28.4±4.7; n=44 and Fs17.0±6.7 ; n=37, respectively) indicate that the clastic matrix of this meteorite contains components of petrologic type >3.5. Oxygen isotopes (A. Pack, UGött): acid-washed bulk sample analyzed by laser fluorination gave δ18O=5.55, δ17O=3.84, Δ17O=0.92

Specimens: 71.2 g IfP; 20 g BathO.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P Oct 2006
Mass (g):949
Pieces:7
Class:LL3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):28.4±4.7 (7-33; n=44)
Ferrosilite (mol%):17.0±6.7 (3-26; n=37)
Classifier:R. Pickard, BathO, and K. Metzler, IfP
Type spec mass (g):71.2
Type spec location:IfP
Main mass:C. Giessler, Germany
Comments:Submitted by Ray Pickard, Knut Metzler
Plots: O isotopes:  
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
BathO: Bathurst Observatory Research Facility, 624 Limekilns Road, Kelso NSW 2795, Australia (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Gipo Meteorites   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Anthony James   
aranemac Photo added 19 Apr 2022
Auricular Photo added 19 Apr 2022
Corey Kuo Photo added 19 Apr 2022
Dirk Hohmann   
Gerald Armstrong Photo added 19 Apr 2022
Photo added 19 Apr 2022
Gregor H.         
Jean-Michel Masson Photo added 19 Apr 2022
John Lutzon            
Konrad Andrä Photo added 19 Apr 2022
Photo added 19 Apr 2022
Photo added 19 Apr 2022
Photo added 19 Apr 2022
Mark Crawford   
Woreczko Jan & Wadi Photo added 19 Apr 2022
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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