Forsterite from the Itkul hyperbasite massif, Southern Urals or once again about glinkite

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Marco E. Ciriotti
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Forsterite from the Itkul hyperbasite massif, Southern Urals or once again about glinkite

Messaggio da Marco E. Ciriotti » lun 14 nov, 2022 17:30

Referenza:
▪ Erokhin, Yu.V., Zakharov, A.V., Ponomarev, V.S., Petrov, D.A., Kropantsev, S.Yu. (2022): Forsterite from the Itkul hyperbasite massif, Southern Urals or once again about glinkite. Zapiski RMO, 151(5), 87-101.

Abstract:
The mineralogy of olivine veins from the Itkul hyperbasite massif, Southern Urals has been studied. These veins are composed of forsterite with minor talc, magnetite, and magnesite. Secondary minerals are iron hydroxides. Itkul olivine, which was discovered in 1847 as a new mineral – glinkite, is forsterite with a fayalite content of 16.5%. It has been shown that the rock formed the veins is metasomatic olivinite which occurred due to recrystallization of host serpentinite under influence of a nearby granite intrusion. It has been suggested that because of visual similarity of Itkul forsterite with Ural demantoid, the latter for a long time began to be called “chrysolites” or “Ural chrysolites”.
Marco E. Ciriotti

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