Energy Drive for the Kiruna Mining District Mineral System(s): Insights from U-Pb Zircon Geochronology

The Kiruna mining district, Sweden, known for the type locality of Kiruna-type iron oxide–apatite (IOA) deposits, also hosts several Cu-mineralized deposits including oxide–copper–gold (IOCG), exhalative stratiform Cu-(Fe-Zn), and structurally controlled to stratabound Cu ± Au. However relationship between IOA Cu-systems has not been contextualized within regional tectonic evolution. A broader mineral systems approach is taken assess timing energy drive(s) a framework by conducting U-Pb zircon geochronology on intrusions from areas where Cu-mineralization spatially proximal. Results unanimously yield ages early Svecokarelian orogeny (ca. 1923–1867 Ma age uncertainties), except one sample Archean basement (2698 3 Ma), indicating that distinct thermal drive magmatic activity was prominent orogenic phase. weighted average 207Pb/206Pb 1877 10 an iron-oxide-enriched gabbroic pluton overlaps in with Kiirunavaara deposit suggested as candidate contributing mafic signatures ore. results leave role late (and subsequent and/or remobilization) ambiguous, despite evidence showing magmatic-style hydrothermal alteration present district.