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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
MB 113  (2024)  CVox3
Recommended:  CVox3    [explanation]

This is 1 of 57 approved meteorites classified as CVox3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 18 Oct 2012
Revised 28 Mar 2024: Revised class based on metbull text
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
Data from:
  MB113
  Table 0
  Line 0:
Classifier:M. Sapah, ANU, and A. Krot, UHaw
Type spec location:NAU* type specimen is at ASU. 2.9 kg at ANU, 284.6 g at ASU; 26 g including one polished thin section at UWB; remainder with Aaronson and Mr. E. Olson.
Comments:Work names 930 and M563, thin section SNM1
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*: Collection discontinued. Specimens redistributed as shown in individual meteorite records, United States (institutional address; updated 24 Jun 2024)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
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)
SNM: Natural History Museum of Slovak National Museum, Vajanského nábr. 2, P.O.BOX 13, 810 06 Bratislava, Slovakia; Website (institutional address; updated 24 Dec 2018)
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)
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States (institutional address; updated 12 Apr 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
Published in Meteoritical Bulletin, no. 113, in preparation (2024)
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)
chen wang   
David L. Ribeca   
Dominik Stoeckli   
Francois Pacaud   
Mike Markowitz   
Qi Lv         
Ryan Upchurch   
Ziyao Wang      
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1399 approved meteorites from Algeria (plus 33 unapproved names) (plus 4 impact craters)

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