The study area? The Massif Central, and more specifically the Haut-Allier region. This region is historically known for its intense mining activity, particularly for Sb and Pb-Zn (e.g., the Pinols district).

The objective? While Sb mineralization has been the subject of numerous studies (most recently in Florent Cheval-Garabedian’s 2019 PhD thesis), this is not the case for Pb-Zn deposits. The latter have been described and studied in less detail. As a result, several elements that are required for the establishment of a complete metallogenic model remain poorly defined: age, structural controls, zoning, driving forces, source(s), etc.

Having this comprehensive understanding of the metallogenic system is an essential first step in considering the study of the (re)mobilization of trace elements contained in parageneses. The Haut-Allier deposits include metals considered critical, such as In, Ge, Ga, and REEs. These elements, whose supply is becoming increasingly problematic, are essential for the successful development of energy transition policies. This is why studying their mobilization, even at trace levels, is important.

This will enable geologists to propose new exploration guides, aimed at optimizing the time needed to discover (or rediscover) new ore deposits.

This post-doctoral project, which addresses current scientific and energy issues, will be carried out within the framework of the ANR CMiO and the PEPR Sous Sol Massif Central program, under the supervision of Bénédicte Cenki (University of Montpellier).