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Northwest Africa 5247
Basic information Name: Northwest Africa 5247
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5247
Observed fall: No
Year found: 2005
Country: Morocco
Mass:help 15.2 g
Classification
  history:
Meteoritical Bulletin:  MB 94  (2008)  CO3
Recommended:  CO3    [explanation]

This is 1 of 635 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 8 Sep 2008
Writeuphelp
Writeup from MB 94:

Northwest Africa 5247

Morocco

Find: 2005

Carbonaceous chondrite (CO3)

History: One black stone was purchased by an anonymous buyer in Munich, October 2005.

Physical characteristics: The single piece weighing 15.2 g is black and covered with black fusion crust.

Petrography: (M. A. Ivanova, Vernad) meteorite consists of chondrules, CAIs, matrix, mineral and chondrules fragments. Average chondrule size is 0.2 mm. The main minerals are olivine, pyroxene, plagioclase. Chondrules contain feldspathic glass. The minor phases are melilite, spinel, chromite, ilmenite, sulfides, kamacite, and tetrataenite. Hydroxides present around metal grains.

Mineral chemistry and geochemistry: Olivine (EMPA) is Fa0.3–49, Cr2O3 0.17, CaO 0.20; MnO 0.21 (wt%); orthopyroxene Fs0.9 Wo1.1 En98, augite Fs2.3 Wo39.8 En57.9, diopside Fs0.6 Wo47.9 En51.5, plagioclase An71.5 Ab28.2 Or0.3; spinel contains 21.8 wt% FeO and 12.0 wt% MgO: Oxygen isotopic compositions (I. A Franchi and R. C Greenwood, OU, by laser fluorination,): δ18O = 1.54‰; δ17O = -2.89‰; Δ17O = -3.69‰.

Classification: Carbonaceous chondrite (CO3). The meteorite shows moderate weathering features.

Type specimens: A total of 3.72 g sample and one thin section are on deposit at Vernad. The anonymous buyer holds the main mass.

Data from:
  MB94
  Table 2
  Line 98:
State/Prov/County:Morocco
Date:2005
Mass (g):15.2
Pieces:1
Class:CO3
Fayalite (mol%):0.3-49
Ferrosilite (mol%):0.9
Wollastonite (mol%):1.1
Classifier:M.A. Ivanova, Vernad
Type spec mass (g):3.7
Type spec location:Vernad
Main mass:anonymous
Comments:δ18O = 1.54‰; δ17O = -2.89‰; Δ17O = -3.69‰.
Plots: O isotopes:  
Institutions
   and collections		 OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
Catalogs:
References: Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1973 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater)

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