(Cave di San Priamo, Monte Idda, Muravera, Cagliari, Sardegna, Italia)
Granite quarries on Mt. Idda, which represents the most extended batholith of Northern Sarrabus. Actually, it represents a so called "Inselberg" (island mountain) due to erosive processes which have disclosed the most ancient nucleus of relief, made of leucogranites. These batholites set in place during Hercynian orogenesis as end of magmatic events. These leucogranites are rich in quartz, K-feldspars and plagioclases, and very poor in biotite or other Fe-Mg minerals. They are crossed by pematitic veins, rich in crystallized minerals, even if other minerals can be found in miarolitic cavities of pink K-feldspar.
Refs.:
- Bralia A., Ghezo G., Guasparri G., Sabatini G. (1982): Aspetti genetici del batolite Sardo-Corso. Rendic. Soc. Ital. Mineral. e Petrol., 38, pp. 701-764
- Guasparri G., Riccobono F., Sabatini G. (1984): Leucogranites of Sardinian batholith: petrologic aspects and their relevance to metallogenesis. Periodico di Mineralogia, 53, pp. 17-52
- Stara P., Astolfi M. (1990): San Priamo. Rivista Mineralogica Italiana, fasc. 1, pp. 51-63
