Stable (C-O) and radiogenic (Sr) isotope geochemistry of the Luiswishi and Kamoto Cu-Co ore deposits, Katanga Copperbelt, Democratic Republic of Congo

Stable and radiogenic isotope geochemistry on carbonates allowed better understanding of the genesis of two main hypogene Cu-Co phases in the Katanga Copperbelt. δ13C and δ18O of dolomites associated with stratiform, early diagenetic, sulphides, belong to the first Cu-Co phase, provide evidence for carbonate precipitation during BSR just before mineralization. Whereas δ13C and δ18O of dolomites associated with stratiform/stratabound, syn-orogenic, sulphides belong to the second Cu-Co phase, indicate carbonate precipitation from a high temperature, host-rock buffered, fluid, possibly under the influence of TSR. Sr isotopes indicate that the mineralizing fluid of the first Cu-Co phase has leached radiogenic Sr and possibly metals by interaction with the granitic basement. However, the fluid responsible for the second Cu-Co phase is most likely a remobilizing fluid that has significantly interacted with the sediments of the Roan Group and possibly did not mobilize additional metals from the granitic basement.

ISBN:9780980558685

Jaar van publicatie:2009

BOF-keylabel:ja

IOF-keylabel:ja

Authors from:Higher Education

Toegankelijkheid:Closed