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The role of the fluid composition in the formation of hydrothermal Cu-Au ores: Insights from in situ analyses of fluid inclusions and Cu-Zn isotope compositions of sulfides by Femto second LA-(MC)-ICP-MS

Leitung:Prof. Dr. Weyer, PD Dr. Horn, PD Dr. Melcher (BGR)
Bearbeitung:Moritz Albrecht
Laufzeit:3 Jahre
Förderung durch:Ministry for Science and Culture of Lower Saxony

A deep understanding in the processes that lead to enrichment of metals in ore deposits is essential in our technical-oriented civilization. Hydrothermal Cu ore deposits are among the most important sources for many metals and fluids play an essential role for the transport and enrichment of these metals. In this project, we want to investigate the composition of fluid inclusions from ore deposits in situ to improve our understanding on the parameters that led to metal enrichment, e.g. salinity or pH-Eh conditions. Trace element abundances of the fluid inclusions will be measured with femtosecond Laser ablation ICP-MS by using a heating freezing ablation cell. Further, we want to analyse the stable metal (Cu and Zn) isotope composition of ores in situ to get additional information on the temperature and the processes that lead to ore formation. Samples from important ore deposits will be provided by the Bundesanstalt für Geowissenschaften und Rohstoffe (BGR). With this study we aim to substantially enhance our knowledge on transport mechanisms of metals and the formation of hydrothermal ore deposits.

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