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Northwest Africa 4969
Basic information Name: Northwest Africa 4969
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4969
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 180 g
Classification
  history:
Meteoritical Bulletin:  MB 93  (2008)  Brachinite
Recommended:  Brachinite    [explanation]

This is 1 of 43 approved meteorites classified as Brachinite.   [show all]
Search for other: Brachinites, Primitive achondrites
Comments: Approved 14 Jan 2008
Revised 4 Aug 2008: final writeup
Writeuphelp
Writeup from MB 93:

Northwest Africa 4969

Northwest Africa

Find: 2007

Achondrite (brachinite)

History and Physical characteristics: A 180 g incomplete stone was purchased in Erfoud, Morocco, by M. Cimala in 2007. It is partially covered by a thin transparent ablation crust.

Petrography: (J. Wittke and T. Bunch, NAU) Fine- to medium-grained (0.1 to 1.2 mm; mean = 0.75 mm) with protogranular texture. Mineral modes (in vol%): olivine = 89, Ca-pyroxene = 6, plagioclase = 2.5, chromite = 1.5; metal and FeS = 1.

Mineral compositions: Olivine is Fa34.7, FeO/MnO = 72-75; diopside is Fs10.0Wo46.4 (Cr2O3 = 0.88-1.2 wt%; Al2O3 = 1.24 wt%), FeO/MnO = 42; plagioclase is An34.6 and chromite Cr/(Cr + Al) = 0.71. Metal is predominantly taenite (Ni = 20.1 wt%).

Classification: Achondrite (brachinite); moderate shock and minimal weathering.

Type specimens: A total of 20.6 g are on deposit at NAU. Cimala holds the main mass.

Submitted by: T. Bunch, NAU.

Data from:
  MB93
  Table 2
  Line 157:
Place of purchase:Erfoud, Morocco
Date:2007
Mass (g):180
Pieces:1
Class:Brach
Type spec mass (g):20.6
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6325 approved meteorites from (Northwest Africa) (plus 2026 unapproved names)

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