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Porphyry deposits distribution along the western Tethyan suture : insights from a paleogeographic approach

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Résumé

In order to better understand the relationships between ore deposit distribution and their tectonic context, and help identifying geodynamic-related criteria of favorability, we propose a paleogeographic approach. We use this approach to study the distribution of porphyry copper deposits along the western Tethyan suture. Spatial and temporal distribution of the deposits is not random and show that they were emplaced in five distinct clusters. Two clusters, in the Aegean-Balkan-Carpathian area, that were emplaced in Upper Cretaceous and Oligo-Miocene, are associated with a specific polyphased kinematic context, within the framework of the Africa-Eurasia convergence. This context is characterized by 1) a fast subduction rate, shortly followed by 2) a drastic decrease of this rate. Although preliminary, these results highlight the control of the geodynamic context, and especially the subduction kinematics, on the genesis of porphyry deposits. This study also confirms that the paleogeographic approach is a promising tool that could help identifying geodynamic and tectonic criteria favoring the genesis of various ore deposit types.
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Dates et versions

hal-00745220 , version 1 (25-04-2013)

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  • HAL Id : hal-00745220 , version 1

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Guillaume Bertrand. Porphyry deposits distribution along the western Tethyan suture : insights from a paleogeographic approach. Mineral Resources Potential Maps : A Tool for Discovering Future Deposits, Mar 2012, Nancy, France. ⟨hal-00745220⟩

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