Mineralogical and fluid inclusion studies of low-sulfidation epithermal veins at Osilo (Sardinia), Italy

Autor:	R. Simeone, S. F. Simmons
Rok vydání:	1999
Předmět:	Arsenopyrite Geochemistry Mineralogy engineering.material Geophysics Sphalerite Geochemistry and Petrology visual_art Argentite engineering visual_art.visual_art_medium Marcasite Economic Geology Fluid inclusions Pyrite Stibnite Quartz Geology
Zdroj:	Mineralium Deposita. 34:705-717
ISSN:	1432-1866 0026-4598
DOI:	10.1007/s001260050229
Popis:	Several precious metal-bearing, low sulfidation epithermal veins occur in the rolling topography of the Osilo area, northern Sardinia. The Sa Pala de Sa Fae and the Sa Pedra Bianca veins were subject to intense diamond drilling exploration in the mid 1990 s. The veins extend for 1–3 km, dip steeply, and range from 1 to 10 m in width. High K-calc-alkaline volcanic deposits containing plagioclase phenocrysts (along with lesser pyroxene, amphibole, magnetite, olivine and sanidine) form the main host rocks. Gold grades in drill intersections range from 50 m from the vein, the assemblage albite + Fe-chlorite + illite + pyrite (± montmorillonite ± calcite ± K-feldspar) prevails regionally, and its formation is attributed to minor metasomatism of the country rock involving the addition of water, carbon dioxide and hydrogen sulfide. At distances
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::15f09a65413b0d705efd0aa7f6d1f51d https://doi.org/10.1007/s001260050229 Zobrazit plný text záznamu Full text from SpringerLink