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Northwest Africa 4502
Basic information Name: Northwest Africa 4502
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4502
Observed fall: No
Year found: 2005
Country: Algeria
Mass:help 100 kg
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  CV3
Recommended:  CV3    [explanation]

This is 1 of 491 approved meteorites classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 18 Oct 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 4502 (NWA 4502)

Algeria

Found: Dec 2005

Classification: Carbonaceous chondrite (CV3)

History: Purchased In 2006 by A. Aaronson.

Physical characteristics: More than 100 kg of dark stones with smooth, desert-polished surfaces. The largest piece is 22.75 kg

Petrography: (T. Bunch and J. Wittke, NAU) Well-defined chondrules, chondrule fragments, and refractory inclusions set in a slightly weathered matrix. CAIs are represented by Type A (a few are very large, up to 32 mm in diameter) and Type C are common, as are AOAs. Type B CAIs are low in abundance however, melilite mantled (Type B1) and fosterite bearing type B CAIs are present. Modal analyses (vol. %): chondrules = 48; CAIs and AOAs = 14; matrix = 38.

Geochemistry: (M. S. Sapah, ANU, and A. N. Krot, UHaw) The meteorite matrix consists of small crystals of ferroan olivine, sulfides, magnetite, Ni-rich metal, tiny nepheline crystals, and small irregularly shaped regions of Ca,Fe-rich silicates (pyroxenes ± andradite). Matrix olivine has Fa48-54 and ferrosillite and wollastonite contents of matrix pyroxenes are 11-19% and 46-49% respectively. Fayalite content of chondrule olivine is Fa2-39, and ferrosillite and wollasonite contents of chondrule pyroxenes are 1-2%.

Classification: (M. S. Sapah and A. N. Krot) Carbonaceous chondrite (CV3). The sample is CV oxidized. The degree of shock is S2 and the weathering degree is W1.

Specimens: >83 kg Aaronson, 35 kg Eric Olson, 2.9 kg ANU, 284.6 g ASU, and 26 g NAU.

Data from:
  MB101
  Table 0
  Line 0:
Date:Dec 2005
Mass (g):>100000
Pieces:Many
Class:CV3
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):12.4 (1.6-50.7, N=45)
Ferrosilite (mol%):3.5 (0.7-19.3, N=33)
Wollastonite (mol%):9.3 (0.7-50.9, N=33)
Classifier:M. Sapah, ANU, and A. Krot, UHaw
Type spec mass (g):284.6
Type spec location:ASU
Main mass:Eric Olsen meteorites
Comments:Submitted by Marian S. Sapah
Institutions
   and collections
ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012)
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
ANU: Research School of Earth Sciences, Australian National University, ACT 0200 Canberra, Australia (institutional address; updated 18 Oct 2012)
Olsen: Unknown person (private address; updated 17 Apr 2009)
UHaw: Hawai'i Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai'i, 2525 Correa Road, Honolulu, HI 96822, United States (institutional address; updated 25 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
abibou   
Aeroliths Collection Theodossiou   
AJS Cosmic Treasures         
Bruno Caspirro   
Chris Osborn   
David L. Ribeca      
Dominik Stoeckli   
Edward Krikorian   
Francois Pacaud   
Gerald Armstrong   
Hayssam Elbaba      
Jean-Michel Masson      
Konrad Andrä      
Krzysztof Nowak   
Liam02   
max   
Michael S. Scherman      
Mike Markowitz   
Pepe Roca   
Piotr gural100         
Robert Zdancewicz   
The Wilcox Collection of Meteorites   
Wang Ziyao      
xeqtr   
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 961 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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