Contrasting apatite geochemistry between ore-bearing and ore-barren intrusions of the giant Kalmakyr gold-rich porphyry Cu deposit, Tien Shan, Uzbekistan

The Kalmakyr deposit in Uzbekistan is one of the world’s largest gold-rich porphyry Cu deposits, and mineralization was proposed to be closely associated with emplacement latest intrusive phases, that is, granodiorite porphyry. However, it still unclear which features these ore-bearing intrusions are crucial for enormous metal enrichment how they correlate magmatic fertility. In this study, we address questions by comparing petrological situ major trace element geochemistry apatite ore-barren intrusions. Magmatic from has higher Eu/Eu* (0.50–0.58), Sr/Y (1.09–1.64), La/Yb (36.19–53.42) ratios than quartz (0.01–0.02, 0.02–0.03, 2.01–3.75, respectively) monzonite (0.20–0.11, 0.36–1.12, 19.71–56.32, respectively). Moreover, granodioritic magma S (average 111 ppm) Cl 8602 contents (S average 9 ppm; 2652 8483 ppm). These collectively suggest relatively high oxygen fugacity, H 2 O, Cl, compared those By our data published dataset Cu–Mo Mo-only deposits world, content low F/Cl ratio might an important indicator prospect deposits.