Major and Trace Element Characteristics of Apatites in Granitoids from Central Kazakhstan: Implications for Petrogenesis and Mineralization

摘要: This paper presents abundances of major and trace elements apatites in granitic rocks associated with different types ore deposits Central Kazakhstan on the basis electron probe microanalysis laser ablation inductively coupled plasma mass spectrometry. Our results demonstrate that concentrations ratios from granitoid show distinct features, are sensitive to magma evolution, petrogenetic metallogenetic processes. Apatites Mo-W have high content F MnO, low Cl, which may be indicative sedimentary sources, while a Pb-Zn deposit relatively Cl content, possibly suggest water content. In these apatites, Sr contents decrease, Mn Y increase evolution. relationship reflects related degree magmatic differentiation. Four REE patterns identified. Type 1 character highest (La/Yb)N Aktogai porphyry Cu-Mo deposit, Sayak-I skarn Cu Akzhal depposit is likely produced by crystallization heavy REE-enriched minerals. 2 upward-convex light apatite porphyries La-enriched mineral crystallization. 3 feature Nd depletion East Kounrad Zhanet both primarily inherits host-rock. 4 Akshatau W-Mo wide range crystallize under temperature range. Three redox states identified based Eu anomaly. The slight negative anomaly displays most oxidized state magma, other samples at Aktogai, moderate oxidizing condition rocks, remaining strong En indicate reductive rocks.