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• W4311622257 endingPage "485" @default.
• W4311622257 startingPage "469" @default.
• W4311622257 abstract "The Habo deposit is a typical porphyry Cu–Mo deposit in the Ailaoshan–Red River metallogenic belt. Ore minerals in the Habo deposit typically occur as veins in the monzonite porphyry. Zircon U–Pb dating suggests the monzonite porphyry formed at 35.07 ± 0.38 Ma. The monzonite porphyry is characterized by high SiO2, Al2O3, K2O and Na2O contents, with A/CNK ratios ranging from 0.97 to 1.02. All samples exhibit fractionated REE patterns characterized by high (La/Yb)N ratios (9.4–13.6, average of 11.2). They show adakite–like geochemical features, high Sr concentrations (627–751 ppm, average of 700 ppm), low Y concentrations (15.13–16.86 ppm, average of 15.81 ppm), and high Sr/Y values (39.5–47.4, average of 44.3). These samples have high initial 87Sr/86Sr ratios (0.7074–0.7076) and negative ɛNd(t) values (-5.1 to -3.7), whereas the zircon ɛHf(t) values range from -2.2 to +0.4, suggesting that the monzonite porphyry was derived from the partial melting of a thickened juvenile lower crust. The oxygen fugacity calculated based on the chemical composition of amphiboles shows ∆NNO values ranging from +1.65 to +2.16 (average of 1.94), and the log(fO2) ranging from -12.72 to -11.99 (average of -12.25), indicating that the monzonite porphyry has high oxygen fugacity. Zircons have high Ce4+/Ce3+ ratios (29.29–164.24, average of 84.92), with high ΔFMQ values ranging from +0.50 to +1.51 (average of 0.87), and high log(fO2) values ranging from -14.72 to -12.85 (average of -14.07), which also indicates the oxygen fugacity of magma is high. The dissolved water content of the Habo monzonite porphyry is 9.5–11.5 wt.%, according to geochemistry characteristics, zircon-saturation thermometry (692–794 °C), and the mineral phases (amphibole, no plagioclase) in the deep magma chamber. Combined with previous studies, we propose that the high oxygen fugacity and high water content of magma played key roles in controlling the formation of the Habo and other Cu–Mo–Au deposits in the Ailaoshan–Red River metallogenic belt." @default.
• W4311622257 created "2022-12-27" @default.
• W4311622257 creator A5014215034 @default.
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• W4311622257 creator A5042209009 @default.
• W4311622257 creator A5051208099 @default.
• W4311622257 creator A5056221694 @default.
• W4311622257 date "2023-04-01" @default.
• W4311622257 modified "2023-10-01" @default.
• W4311622257 title "Petrogenesis and Physicochemical Conditions of Fertile Porphyry in Non‐arc Porphyry Mineralization: A Case from Habo Porphyry Cu‐Mo Deposits, SW China" @default.
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