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Northwest Africa 7303
Basic information Name: Northwest Africa 7303
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7303
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 18.3 g
Meteoritical Bulletin:  MB 101  (2012)  R3-5
Recommended:  R3-5    [explanation]

This is 1 of 23 approved meteorites classified as R3-5.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 23 Aug 2012
Writeup from MB 101:

Northwest Africa 7303 (NWA 7303)

(Northwest Africa)

Purchased: 2011 Dec 1

Classification: Rumuruti chondrite (R3-5)

History: The two halves of the stone were bought on e-bay from Michael Cottingham.

Physical characteristics: An 18.3 g fully crusted stone.

Petrography: Cut surfaces show a greyish interior with light clasts (up to 1 cm, mostly rounded) and dark clasts (up to 1 cm, more angular) in a gray matrix. Brecciated and heavily fractured. The meteorite is dominated by well-delineated chondrules, chondrules fragments, mineral fragments and sulfides. Olivine is abundant. Minor orthopyroxene and Ca pyroxene. Matrix and chondrules are found in similar proportions. Some clasts are shock darkened.

Geochemistry: Olivine composition is equilibrated at Fa38.3±1.4 (n=12), but two outliers are Fa5.6 and Fa6.4. Olivine Fe/Mn=84. Olivine NiO = 0.17 wt%. Rare orthopyroxene (Fs9-16 Wo0.7-1.7, n=2) and Ca Pyroxene (Fs7-17Wo38-47, n=4). Plagioclase An21Or1.0.

Classification: Rumuruti chondrite (R3-5). Minimal weathering.

Specimens: 4 g and a polished section at CEREGE

Data from:
  Table 0
  Line 0:
Date:P 2011 Dec 1
Mass (g):18.3
Weathering grade:minimal
Fayalite (mol%):38.3±1.4 (n=12)
Ferrosilite (mol%):5.7 (n=1)
Wollastonite (mol%):0.7 (n=1)
Magnetic suscept.:2.99
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):4.1
Type spec location:CEREGE
Main mass:R. Lenssen
Comments:Submitted by J. Gattacceca
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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     This is 1 of 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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