Siliqua

Porphyry copper prospect in Sardegna, Italy

Names and other identifiers

GMRAP ID 3172
Tract name Western Peri-Mediterranean Region (150pCu6005)
Site status prospect

Geographic location

Country Italy
State or province Sardegna
Geographic location 8.85, 39.32
Geologic map unit 8.85, 39.32
Nearby data

Geologic information

Deposit type Porphyry copper
Age determination method Geologic inference
Age range Oligocene–Miocene
Age reference geologic inference
Minerals albite, barite, biotite, calcite, chalcopyrite, chlorite, epidote, gold, kaolinite, magnetite, marcasite, molybdenum, pyrite
Associated rocks calc-alkaline volcanic rocks
Tectonic setting postconvergence
Stratigraphic age Oligocene–Miocene

Commodity and development information

Development status Prospect
Major commodities Cu, Au, Mo
Gold-Moly ratio -9999

Reference information

Comments In 2000, this was speculated as a porphyry Cu-Au-Mo system. The area has acid drainage from the unmined deposit and surface waters and soils have indicated high heavy-metal concentrations. Stock-like structures in the andesite with a potassic alteration zone where identified.
Study area name Europe
References Fiori and others (1998); Fiori and others (2000)
Site reference Sutphin and others (2013)
Fiori, M., Granizio F., and Grillo, S.M., 1998, Porphyry copper occurrence of the Siliqua subvolcanic complex, south-western Sardinia, Italy, in International Platinum Symposium, 8th, Rustenburg, South Africa, June 28–July 3,1998, Proceedings: The Geological Society of South Africa and The South African Institute of Mining and Metallurgy Symposium Series S18, p. 111–114.
Fiori, Maddalena, Granitzio, Fabio, and Grillo, S.M., 2000, Preliminary results on heavy metals content in soils and water in an area with unexplored epithermal porphyry occurrences: International Mine Water Association Congress, 7th, Ustron, Poland, 2000 [Proceedings], p. 127–136.