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Northwest Africa 7033
Basic information Name: Northwest Africa 7033
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7033
Observed fall: No
Year found: 2011
Country: Morocco
Mass:help 468 g
Meteoritical Bulletin:  MB 100  (2012)  H4-melt breccia 
Recommended:  H4-melt breccia    [explanation]

This is 1 of 8 approved meteorites (plus 1 unapproved name) classified as H4-melt breccia.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 16 Dec 2011
Writeup from MB 100:

Northwest Africa 7033 (NWA 7033)


Found: 2011

Classification: H4-melt breccia

History: Purchased by Matt Morgan at the Denver Gem and Mineral Show, 2011.

Physical characteristics: Cut surface shows numerous small metallic globules set in dark matrix.

Petrography: (C. Agee, UNM) Microprobe examination shows clast-poor melt possessing a diffuse contact boundary with shocked remnant host chondrite. Globules of Fe-Ni metal+sulfide (to 500 μm) are dispersed in the quenched melt. Chondrite host contains chondrules, clasts, and shocked H4 silicates.

Geochemistry: (C. Agee and N. Wilson, UNM) Olivine and pyroxene geochemistry is from the chondrite portion. Olivine Fa19.6±1.2, Fe/Mn=41±4, n=6. Orthopyroxene Fs18.0±2.1Wo1.5±0.2, Fe/Mn=25±5, n=9.

Classification: H4-melt breccia, mean and standard deviation of Fa and Fs contents of mafic silicates in host rock consistent with type 4. Weathering grade W2.

Specimens: 24.1 g on deposit at UNM. MtMorgan holds the main mass.

Data from:
  Table 1
  Line 1583:
Place of purchase:Denver Gem and Mineral Show
Mass (g):468
Class:H4-melt breccia
Shock stage:S6
Weathering grade:W2
Fayalite (mol%):19.6±1.2
Ferrosilite (mol%):18.0±2.1
Wollastonite (mol%):1.5±0.2
Classifier:C. Agee, UNM
Type spec mass (g):24.1
Type spec location:UNM
Main mass:MtMorgan
Comments:Submitted by C. Agee
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
MtMorgan: Matt Morgan, Mile High Meteorites, P.O. Box 151293, Lakewood, CO 80215-9293, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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     This is 1 of 1743 approved meteorites from Morocco (plus 26 unapproved names) (plus 1 impact crater)

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