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Northwest Africa 10297
Basic information Name: Northwest Africa 10297
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10297
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 900 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  L3
Recommended:  L3    [explanation]

This is 1 of 709 approved meteorites classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 8 Sep 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 10297 (NWA 10297)

(Northwest Africa)

Purchased: 2015 Jan

Classification: Ordinary chondrite (L3)

History: Purchased by Marcin Cimała in Zagora, January 2015.

Physical characteristics: Single stone with weathered exterior. A saw cuts shows many densely packed chondrules set in orange-brown matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous porphyritic chondrules, most with mesostasis or glass. Scattered opaque matrix. Apparent mean chondrule diameter 714±303 μm, n=20.

Geochemistry: (C. Agee and N. Muttik, UNM) Chondrule olivine Fa22.1±10.4, Cr2O3=0.05±0.04 (wt%), n=30; chondrule low-Ca pyroxene Fs19.2±12.9Wo1.6±1.6, n=12.

Classification: Ordinary chondrite (L3), estimated subtype L3.5 based on mean value of Fa and 1-sigma standard deviation, and on the ferroan olivine mean value of Cr2O3 and 1-sigma standard deviation, similar to Chainpur L3.4 and Tieschitz L3.6 (Grossman and Brearley, 2005).

Specimens: 20.6 g including a probe mount on deposit at UNM, Marcin Cimała holds the main mass.

Bibliography:
  • Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)
Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2015 Jan
Mass (g):900
Pieces:1
Class:L3
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):22.1±10.4
Ferrosilite (mol%):19.2±12.9
Wollastonite (mol%):1.6±1.6
Classifier:C. Agee, UNM
Type spec mass (g):20.6
Type spec location:UNM
Main mass:Marcin Cimala
Comments:Field name MC 131; submitted by C. Agee, UNM
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
John A. Shea   
Woreczko Jan & Wadi      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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