Tremolite and anthophyllite occurs as an asbestiform envelope around pegmatitic intrusion into the ultrabasic rocks. It is these pegmatitic veins that hosts the corundum, and the gem …

The intrusion has produced two areas of contact-metamorphic rock, separated) a zone of relatively unmetamorphosed limestone. The first of these (called in paper the inner area) …

Tremolite coloured green by chrome (Cr 3+) is often called chrome-tremolite, whereas the purple variety, coloured by manganese, is called hexagonite. The amphibole varieties byssolite (hair …

Intrusion of the Adamello granite (Tertiary) in the southern Alps (northern Italy) caused a distinct mineralogical and chemical zonation within the country rock dolomites. The

Mobile elements extracted from supra-subduction dykes temporarily enriched the circulating fluids and generated tremolite, antigorite, Mg-chlorite and magnetite instead of antigorite and …

grandodiorite intrusion. Alteration of the non-calcareous rocks resulted in the formation of an outer zone characterised by muscovite ± albite, and an inner zone characterised by microcline and …

2011年10月19日 · Distinct tremolite veins are documented in the dolomitic limestone rafts within the Bergell intrusion (Bucher-Nurminen 1981; Bucher 1998). These veins formed by reaction …