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Northwest Africa 5153
Basic information Name: Northwest Africa 5153
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5153
Observed fall: No
Year found: 2007
Country: Morocco
Mass:help 50.4 g
Meteoritical Bulletin:  MB 94  (2008)  Lunar feldspathic breccia
Recommended:  Lunar    [explanation]

This is 1 of 102 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 3 Sep 2008
Writeup from MB 94:

Northwest Africa 5153


Find: 2007

Achondrite (lunar, feldspathic breccia)

History and physical characteristics: A 50.4 g nearly complete stone was purchased in Erfoud, Morocco, in January 2008. The aeolian-modified fusion crust is dark gray to reddish-brown.

Petrography: (T. Bunch and J. Wittke, NAU; Dolores Hill, UA) Fragmental to melt-matrix breccia that contains an assortment of lunar highland lithologies and Mare basalts and glasses. Highland components include cataclastic gabbro, troctolite, fragments of granophyric intergrowths of K-feldspar, felsic glasses and silica. Mare components include ophitic pigeonite and olivine basalts. Interior is very fresh and lacks alteration veins.

Mineral/phase compositions: Gabbro olivine is Fa31.7 (FeO/MnO = 99) and pigeonite is Fs25.7Wo9.3 (FeO/MnO = 53). Troctolite olivine is Fa22.3 (FeO/MnO = 80), Ca-pyroxene is Fs22.1Wo17, chromite Cr/(Cr + Al) = 0.63, and granophyric K-feldspar is An14.5Or54.3 with BaO = 2.6 wt%. Mare ophitic pigeonite basalt olivine is Fa36.7 (FeO/MnO = 106), pigeonite is Fs7.1Wo13.3(FeO/MnO = 65) and ilmenite MgO = 5.2 wt%. Olivine basalt olivine is Fa36.2 (FeO/MnO = 94) and Ca-poor pyroxene is Fs32.1Wo13.3 (FeO/MnO = 62).

Bulk chemistry: (R. Korotev, WUSL): Na2O = 0.476 wt%; Sc = 25.6 ppm; Cr = 1963 ppm; FeO = 12.72 wt%; Ni = 150 ppm; Co = 42.4 ppm and Sr = 132 ppm.

Classification: Achondrite (lunar feldspathic breccia).

Type specimen: 5 g and one thin section are on deposit at NAU and one thin section and 0.3 g are on deposit at UA. DPitt holds the main mass.

Data from:
  Table 2
  Line 94:
Mass (g):50
Class:Lunar feldspathic breccia
Fayalite (mol%):31.7, 22.3,36.7
Ferrosilite (mol%):25.7, 22.1, 7.1
Wollastonite (mol%):9.3, 17, 13.3
Classifier:T. Bunch and J. Wittke, NAU
Type spec mass (g):5
Type spec location:NAU
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
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     This is 1 of 1967 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater)

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