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Northwest Africa 5151 | |||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 5151 This is an OFFICIAL meteorite name. Abbreviation: NWA 5151 Observed fall: No Year found: 2007 Country: Algeria Mass: ![]() | ||||||||||||||||||||||||
Classification history: |
This is 1 of 92 approved meteorites classified as Lunar. [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||
Comments: | Approved 3 Sep 2008 | ||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 94:
Northwest Africa 5151 Algeria Find: 2007 Achondrite (lunar, feldspathic breccia) History and physical characteristics: A 289 g stone was purchased in Rissani, Morocco, in 2007. The exterior is reddish-brown to dark gray with minor, translucent residual fusion crust. Petrography: (J. Wittke and T. Bunch, NAU) The fragmental to melt matrix contains abundant breccia-within-breccia clasts together with typical highlands lithic components that mostly include anorthosites, noritic and troctolitic anorthosites, troctolites (olivine >40 vol%), gabbros, granulites, cataclastic breccias, shock melt clasts, in addition to mare basalt clasts and mineral fragments. Several small to mm-size metal globules are scattered throughout the matrix. Numerous dark brown, shock-melt veins are present along large clast margins. Interior weathering grade is very low with no apparent alteration veins. Mineral compositions: Noritic anorthosite orthopyroxene is Fs24.4Wo3.8 (FeO/MnO = 60), plagioclase = An94.2. Gabbro olivine is Fa34.1 (FeO/MnO = 97), plagioclase is An88.1, pigeonite is Fs27.9Wo9.2 (FeO/MnO = 55), chromite Cr/ (Cr + Al) = 0.65 and Ni in metal is 5.8 to 6.6 wt%. Bulk chemistry (R. Korotev, WUSL): Na2O = 0.478 wt%; Sc = 16.7 ppm, Cr = 1440 ppm; FeO = 8.52 wt%; Ni = 171 ppm; Ba = 183 ppm; Th = 1.76 ppm. Classification: Achondrite (lunar feldspathic breccia). Type specimen: A total of 20.3 g is on deposit at NAU. The main mass holder is anonymous. | ||||||||||||||||||||||||
Data from: MB94 Table 2 Line 92: |
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Institutions 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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
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Geography:![]() |
Statistics: This is 1 of 1073 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters) |