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Northwest Africa 7024
Basic information Name: Northwest Africa 7024
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7024
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 78 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  H7
Recommended:  H7    [explanation]

This is 1 of 21 approved meteorites classified as H7.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 30 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7024 (NWA 7024)

(Northwest Africa)

Purchased: 2011 Apr

Classification: Ordinary chondrite (H7)

History: Purchased by Stefan Ralew from a dealer in Erfoud, Morocco, in 2011 April.

Petrography: (A. Irving and S. Kuehner, UWS) Metamorphic texture with triple grain junctions among olivine, orthopyroxene, sodic plagioclase, altered kamacite, chromite and troilite. No clinopyroxene or phosphates were found.

Geochemistry: Olivine (Fa17.9-18.0), orthopyroxene (Fs16.0±0.0Wo3.0-3.2). Oxygen isotopes (R. Tanaka, OkaU): analyses of acid-washed subsamples by laser fluorination gave δ17O 2.796, 2.874; δ18O 4.191, 4.294; Δ17O 0.588, 0.612 per mil.

Classification: Ordinary chondrite H7. This specimen has affinities with H chondrites, but recrystallization has been so extensive that all minerals have triple grain junctions.

Specimens: 16 g of type material and one polished thin section are on deposit at UWB. The remaining material is held by Ralew.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2011 Apr
Mass (g):78
Pieces:1
Class:H7
Shock stage:low
Weathering grade:low
Fayalite (mol%):17.9-18.0
Ferrosilite (mol%):16.0±0.0
Wollastonite (mol%):3.0-3.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):16
Type spec location:UWB
Main mass:S. Ralew
Comments:SR11-5; submitted by A. Irving
Plots: O isotopes:  
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
OkaU: Institute for Study of the Earth's Interior, Okayama University, Misasa Tottori 682-0193, Japan (institutional address)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
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 uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
John Lutzon   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

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