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Northwest Africa 4419
Basic information Name: Northwest Africa 4419
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4419
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 103.1 g
Meteoritical Bulletin:  MB 94  (2008)  R4
Recommended:  R4    [explanation]

This is 1 of 68 approved meteorites classified as R4.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 8 Sep 2008
Writeup from MB 94:

Northwest Africa 4419

Northwest Africa

Find: 2006

Rumuruti chondrite (R4)

History: A complete stone was recovered in northwest Africa and sold in Erfoud to an anonymous buyer.

Physical characteristics: The sample is a single stone, weighing 103.15 g, partially covered with a black fusion crust.

Petrography: (V. Moggi Cecchi, G. Pratesi, MSP) The section consists of well-defined, chondrules (up to 1 mm), accounting for ~50% of the section by area, as well as chondrule and mineral fragments set in a slightly recrystallized matrix of silicates and sulfides (both troilite and pentlandite). Various textural types of chondrules are visible. Main phases are olivine, augite and plagioclase. The meteorite appears unbrecciated in the thin section studied.

Geochemistry: Mineralogy: Olivine Fa39.8, low-Ca pyroxene mean Fs22.8; range Fs13.9–29.1. Oxygen isotopes (I. Franchi, R. Greenwood, OU): δ17O = 5.469‰, δ18O = 6.031‰, Δ17O = +2.333‰.

Classification: Rumuruti chondrite (R4): S2; moderate weathering.

Type specimens: A total of 20.8 g and one thin section are on deposit at MSP. An anonymous dealer holds the main mass.

Data from:
  Table 2
  Line 20:
State/Prov/County:Northwest Africa
Mass (g):103.1
Fayalite (mol%):39.8
Ferrosilite (mol%):13.9-29.1
Classifier:V. Moggi Cecchi, G. Pratesi, Museo di Scienze Planetarie
Type spec mass (g):20.8
Type spec location:MSP
Main mass:anonymous
Comments:δ17O = 5.469‰, δ18O = 6.031‰, Δ17O = +2.333‰.
Plots: O isotopes:  
   and collections
MSP: Museo di Scienze Planetarie, Via Galcianese 20/H, 59100 Prato, Italy, Italy; Website (institutional address; updated 22 Oct 2022)
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)
References: Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
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Photos from the Encyclopedia of Meteorites:
Don Edwards   
Matteo Chinellato   

     This is 1 of 9689 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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