Lodranites
Name
*click on the Name for more information
Structure Class
Primitive achondrites
Chemical Class
Lodranite
Country
(Northwest Africa)
Year found
2013
Mass
955 g
[Museum Collection]
(1) 82.8g
History: Purchased in September 2013 by Sergey Vasiliev and Marc Jost from a dealer in Ouarzazate, Morocco. Physical characteristics: A single breccia stone (955 g) containing prominent green clinopyroxene grains and stained kamacite. Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed of mineral clasts (up to 2.8 mm) of olivine, orthopyroxene, polysynthetically-twinned clinopyroxene, troilite, stained metal, Cr-rich chromite, rare merrillite, and some composite metal grains consisting of finely intergrown kamacite+taenite+plessite). Geochemistry: Olivine (Fa11.6-11.8; FeO/MnO = 22-27), orthopyroxene (Fs10.4-12.0Wo2.7-1.7; FeO/MnO = 14-15), clinopyroxene (Fs4.4-5.1Wo44.3-43.1; FeO/MnO = 10-12). Classification: Lodranite breccia. Specimens: 27 g including a polished thin section at UWB. The remainder is held jointly by Mr. S. Vasiliev and Mr. M. Jost.
*click on the Name for more information
Structure Class
Primitive achondrites
Chemical Class
Lodranite
Country
(Northwest Africa)
Year found
2015
Mass
352 g
[Museum Collection]
(1) 16.4g
History: Purchased by Marc Jost in October 2015 from a Moroccan dealer at the Munich Show. Petrography: (A. Irving and S. Kuehner, UWS) Heterogeneous, highly recrystallized and partly annealed breccia composed of polymineralic clasts and related mineral debris. Some deformed orthopyroxene grains are up to 4 mm in size, but most mineral grains are much smaller and variable in size. Minerals are olivine, orthopyroxene, clinopyroxene, chromite, altered Ni-poor kamacite and troilite. Geochemistry: Olivine (Fa10.6-10.9, FeO/MnO = 33-35, N = 3), orthopyroxene (Fs9.9-10.0Wo1.0-2.2, FeO/MnO = 18-19, N = 2), clinopyroxene (Fs3.6-4.4Wo46.3-43.5, FeO/MnO = 10-13, N = 2). Classification: Lodranite (recrystallized breccia). Specimens: 20.1 g including one polished thin section at UWB; remainder with SJS.