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Northwest Africa 4024
Basic information Name: Northwest Africa 4024
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4024
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 38.1 g
Classification
  history:
Meteoritical Bulletin:  MB 91  (2007)  Winonaite
Recommended:  Winonaite    [explanation]

This is 1 of 90 approved meteorites classified as Winonaite.   [show all]
Search for other: Primitive achondrites, Winonaites
Comments: Approved 28 Mar 2007
Writeuphelp
Writeup from MB 91:

Northwest Africa 4024

Northwest Africa

Find: August 2005

Achondrite (winonaite)

History: The meteorite was found by an anonymous finder in the western part of the Sahara and bought by the main mass holder in Erfoud, Morocco.

Physical characteristics: A single stone of 38.1 g was recovered.

Petrography: (A. Greshake, MNB) The meteorite exhibits an equilibrium texture of low-Ca pyroxene, Ca-pyroxene, olivine, plagioclase, Fe,Ni-rich metal, and troilite with low-Ca pyroxene being the dominant silicate phase. Fe,Ni metal and troilite are dominant in several regions and no relict chondrules were found.

Mineral compositions and geochemistry: Olivine (Fa4.2), low-Ca pyroxene (Fs6.1), plagioclase (An11), determined by EMP. Oxygen isotopes: (I. A. Franchi and R. C. Greenwood, OU) δ17O = 3.01, δ18O = 6.60, Δ17O = −0.42 (mean of 2; all ‰).

Classification: Primitive achondrite (winonaite); minimal shock, minimal weathering.

Type specimen: A total of 8 g plus one polished thin section are on deposit at MNB. HSSH holds the main mass.

Data from:
  MB91
  Table 2
  Line 166:
Place of purchase:Erfoud, Morocco
Date:2005 Aug
Mass (g):38.1
Pieces:1
Class:Win
Shock stage:minimal
Weathering grade:extensive
Fayalite (mol%):4.2
Ferrosilite (mol%):6.1
Classifier:A. Greshake, MNB
Type spec mass (g):8
Type spec location:MNB
Main mass:HSSH
Plots: O isotopes:  
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
HSSH: Hanno Strufe, Langenbergstr. 32, 66954 Pirmasens, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Aeroliths Collection Theodossiou   
Antonello Petriccione   
Dominik Stoeckli   
eraserhead   
Gregor H.   
Space Jewels      
Ziyao Wang      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9921 approved meteorites from (Northwest Africa) (plus 1838 unapproved names)

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