Carbonate-Hosted Base Metal Deposits

Kamona, Fred

doi:10.5772/25885

Cited by 2 publications

(1 citation statement)

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“…Fluid inclusion studies by Voudouris () on ore minerals yield formation temperatures between 250 and 360 °C. These temperatures place the deposit outside the accepted temperature range for MVT (Mississippi Valley Type) and SEDEX (sedimentary exhalative deposits) deposits, and classify the Lavrion district as a high‐temperature (> 200 °C) carbonate‐replacement deposit (Megaw et al ., ; Bonsall et al ., ; Kamona, ). The age of the deposit is broadly Miocene, but the only geochronology that has been conducted in the region includes U–Pb ages from the granodiorite and related intrusions and a few regional K–Ar and fission track cooling ages (e.g.…”

Section: Introductionmentioning

confidence: 98%

Footwall mineralization during Late Miocene extension along the West Cycladic Detachment System, Lavrion, Greece

et al. 2012

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The West Cycladic Detachment System (WCDS) has been mapped from the western Cycladic islands to Lavrion (mainland Greece), where several top-to-SSW low-angle normal faults at different structural levels are observed. Near the detachment horizon, hydrothermal fluid flow originating from Miocene intrusions lead to high-temperature carbonate strata-bound Pb-Ag-Zn ore deposits. Zircon (U-Th)/He cooling ages from the mineralized footwall are 7.1 AE 0.6 to 7.9 AE 0.6 Ma. Carbon-and O-isotope analyses of the carbonate host indicate high water-to-rock ratios during brittle deformation-induced metasomatism, and that this interaction, unrelated to proximity of the intrusions, plays the dominant role in the mineralization. The Late Miocene geology of Lavrion is strikingly similar to Serifos island on the SE termination of the WCDS, both characterized by strong localization of detachment faulting and the interaction of brittle deformation with the injection of fluids related to granitoid intrusions.

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Section: Introductionmentioning

confidence: 98%