A large number of samples containing sulfides, sulfosalts and cassiterite from the Corvo volcanogenic massive sulfide deposit, exploited at the Neves-Corvo mine, southern Portugal, were analyzed using electron and proton microprobes after a detailed examination by reflected-light ore microscopy. The samples are representative of the main four types of ore: cupriferous rubane ore, rubane ore with tin, cupriferous massive sulfide ore and cupriferous massive sulfide ore with tin. The trace-element distribution among the minerals from the four ores, and particularly the high Sri and In contents as well as the Se/S values of pyrite, provide evidence of a magmatic signature for this complex and unique deposit. With respect to cassiterite, which is a characteristic major ore mineral at the Corvo deposit, both chemical composition and textural relationships to sulfides suggest that the high-temperature reduced fluids that deposited sulfides also deposited cassiterite. The mineralogical and geochemical data support the field hypothesis of an allochthonous origin for rubane ores, inferred to be a part of the stockwork of massive mineralization, thrust on the top of massive ores during the Late Hercynian.

Trace-element distribution in cassiterite and sulfides from rubané and massive ores of the Corvo deposit, Portugal / Serranti, Silvia; Ferrini, Vincenzo; Masi, Umberto; L. J., Cabri. - In: CANADIAN MINERALOGIST. - ISSN 0008-4476. - STAMPA. - 40:3(2002), pp. 815-835. [10.2113/gscanmin.40.3.815]

Trace-element distribution in cassiterite and sulfides from rubané and massive ores of the Corvo deposit, Portugal

SERRANTI, Silvia;FERRINI, Vincenzo;MASI, Umberto;
2002

Abstract

A large number of samples containing sulfides, sulfosalts and cassiterite from the Corvo volcanogenic massive sulfide deposit, exploited at the Neves-Corvo mine, southern Portugal, were analyzed using electron and proton microprobes after a detailed examination by reflected-light ore microscopy. The samples are representative of the main four types of ore: cupriferous rubane ore, rubane ore with tin, cupriferous massive sulfide ore and cupriferous massive sulfide ore with tin. The trace-element distribution among the minerals from the four ores, and particularly the high Sri and In contents as well as the Se/S values of pyrite, provide evidence of a magmatic signature for this complex and unique deposit. With respect to cassiterite, which is a characteristic major ore mineral at the Corvo deposit, both chemical composition and textural relationships to sulfides suggest that the high-temperature reduced fluids that deposited sulfides also deposited cassiterite. The mineralogical and geochemical data support the field hypothesis of an allochthonous origin for rubane ores, inferred to be a part of the stockwork of massive mineralization, thrust on the top of massive ores during the Late Hercynian.
2002
applied geochemistry; cassiterite; geochemistry; iberian pyrite belt; neves-corvo; neves-corvo mine portugal; ore deposits; ore genesis; portugal; proton microprobe; sulfide minerals; trace element; volcanogenic massive sulfide
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Trace-element distribution in cassiterite and sulfides from rubané and massive ores of the Corvo deposit, Portugal / Serranti, Silvia; Ferrini, Vincenzo; Masi, Umberto; L. J., Cabri. - In: CANADIAN MINERALOGIST. - ISSN 0008-4476. - STAMPA. - 40:3(2002), pp. 815-835. [10.2113/gscanmin.40.3.815]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/251581
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