Description
On offer: a 15.74g endcut.
Dimensions: ~43 x 23 mm
What you get: this 15.74g endcut, a label and signed Certificate of Authenticity.
Type: Polymict diogenite
Country: Oman, Dhofar
Date of find: 2011
Total mass: 49.72 g
Dhofar 1768 (Dho 1768) 19.038°N, 54.906°E
Zufar, Oman
Found: 2011 Mar
Classification: HED achondrite (Diogenite, polymict)
History: Found by an anonymous prospector in March 2011.
Petrography: (A. Irving and S. Kuehner, UWS) Angular mineral grains of orthopyroxene, olivine, calcic plagioclase, exsolved pigeonite, silica polymorph, ilmenite, chromite, troilite and minor pentlandite are set in a sparse, finer grained matrix.
Geochemistry: Olivine (Fa43.3-44.6, FeO/MnO = 46-48), diogenitic orthopyroxene (Fs21.6-23.4Wo0.4-1.7, FeO/MnO = 34-36), orthopyroxene host (Fs58.7Wo5.6, FeO/MnO = 32), clinopyroxene exsolution lamellae (Fs27.2-30.5Wo42.6-39.9, FeO/MnO = 30-33), ferropigeonite (Fs45.5Wo25.4).
Classification: Diogenite (polymict).
Specimens: Type specimen plus one polished thin section at PSF; main mass with anonymous collector.
