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Northwest Africa 3250
Basic information Name: Northwest Africa 3250
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 3250
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 916 g
Meteoritical Bulletin:  MB 97  (2010)  Primitive achon, ungrouped
Recommended:  Achondrite-prim    [explanation]

This is 1 of 16 approved meteorites classified as Achondrite-prim.   [show all]
Search for other: Primitive achondrites
Comments: Approved 3 Nov 2009
Writeup from MB 97:

Northwest Africa 3250

Northwest Africa

Found: 2005

Classification: Primitive achondrite (ungrouped)

Physical characteristics: (E. Haiderer, Haiderer, and R. Bartoschewitz): One olive green stone of 916 g covered by about 20% of black fusion crust was found in 2005 and sold at a mineral show in Germany. Magnetic susceptibility log χ = 4.74 · 109 m3⁄kg.

Petrography: (R. Bartoschewitz): Fine- to medium-grained unbrecciated rock (0.05–1 mm) with primarily protogranular texture composed of (in vol%) olivine (58%), low-Ca pyroxene (38%), and accessory plagioclase (1%), taenite (2%), troilite (1%), and chromite (<1%). Metal inclusions do not show any rust halos.

Geochemistry: (R. Bartoschewitz, P. Appel⁄B. Mader Kiel, E. Haiderer, J. Atard, La Valetta): Olivine Fa37.4–38.1, Fe⁄Mn 87 (atomic); low-Ca pyroxenes Fs29.6–30.6, Wo3.2–2.8, Fe⁄Mn 56 (atomic); plagioclase An46.4–49.4Or1.1–1.5. Taenite Ni 17.6–21.2, Co 1.0–1.2; chromite TiO2 1.3–1.5, Al2O3 13.3–13.5, MgO 3.0–3.4 (all wt%). O-isotopes (I. A. Franchi and R. C. Greenwood, OU): δ17O = -0.03, δ18O = 3.25, Δ17O = -1.72.

Classification: (R. Bartoschewitz and E. Haiderer): Primitive achondrite (ungrouped).

Specimens: A total of 20 g is on deposit at Kiel, Bart holds 9.7 g and one thin section, Haiderer holds the main mass.

Data from:
  Table 1
  Line 104:
Place of purchase:Germany
Mass (g):916
Class:Primitive achon, ungrouped
Fayalite (mol%):37.4-38.1
Ferrosilite (mol%):29.6-30.6
Magnetic suscept.:4.74
Classifier:R. Bartoschewitz, P. Appel, B. Made, Kiel; O-isotopes: I. A. Franchi and R. C. Greenwood, OU
Type spec mass (g):20.0
Type spec location:Kiel
Main mass:Haiderer
Plots: O isotopes:  
   and collections
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
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)
Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019)
Haiderer: Erich Haiderer Laboratory, P.O. Box 88, A-1140 Vienna, Austria (private address; updated 7 Jan 2015)
References: Published in Meteoritical Bulletin, no. 97, MAPS 45, 449-493 (2010)
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     This is 1 of 9746 approved meteorites from (Northwest Africa) (plus 1855 unapproved names)

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