STUDY OF MINERALIZING FLUIDS CHARACTERIZATION BY USE OF FLUID INCLUSION AND OXYGEN-HYDROGEN ISOTOPES IN BONDAR HANZA PORPHYRY COPPER DEPOSIT (SOUTHEAST OF KERMAN)

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MOHEBI A.; HEZARKHANI A.; BEHZADI M.; MIRNEJAD H.; TAGHIZADEH H.

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Journal: GEOSCIENCES Year:2015 | Volume:24 | Issue:96 Page(s): 53-64

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Title

STUDY OF MINERALIZING FLUIDS CHARACTERIZATION BY USE OF FLUID INCLUSION AND OXYGEN-HYDROGEN ISOTOPES IN BONDAR HANZA PORPHYRY COPPER DEPOSIT (SOUTHEAST OF KERMAN)

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Keywords

URMIA-DOKHTAR ZONEQ2

BONDAR HANZAQ2

PORPHYRY COPPER DEPOSITQ2

FLUID INCLUSIONQ1

OXYGEN-HYDROGEN ISOTOPESQ2

Abstract

Bondar Hanza PORPHYRY COPPER DEPOSIT occurs 150 km southeast of Kerman, in Dehaj-Sardoiyeh zone in southern part of the Urmia-Dokhtar belt. The deposit is hosted in dioritic to granodioritic rocks. The present paper deals with the study of FLUID INCLUSIONs on quartz and hornblende samples as well as the measurement of isotopic ratio of oxygen and hydrogen with the aim to recognize characterization of hydrothermal fluids effective in mineralization. The studied veinlets are divided into five groups. Veinlet I: fluid of high pressure (>300 MPa) and medium to high temperature (250°C-300°C) with salinity of 38-45 Wt%NaCl that includes molybdenum mineralization. This veinlet contains halite and anhydrite and has resulted in potassic and sodic-calcic mineralization in deeper parts of the ore deposit. Veinlet II: high pressure (>300 MPa), high salinity (33-47 Wt%NaCl) and high temperature (250oC-420oC), containing copper and molybdenum mineralization as well as potassic alteration. Veinlet III: high salinity (40-56 Wt%NaCl), high pressure (>300 MPa) and high temperature (200oC-500oC), containing copper mineralization. Veinlet IV: medium to low salinity (6-7 Wt%NaCl), medium temperature (approximately 170oC), low pressure (0.7-0.8 MPa), containing no mineralization. The study performed indicate that the boiling occurred in the initial magma, as a result of pressure and temperature changes and mixing with meteoric waters, caused copper and molybdenum mineralization. Results obtained from oxygen and hydrogen isotopic analysis in quartz show δ18O to vary from 3.9 to 6.3 per mil. Considering its formation temperature and based on thermometric study (130-400oC), the amount of δ18o in mineralizing fluid is from 5.26 to 6.19 per mil, being indicative of magmatic origin of mineralization fluids like the other PORPHYRY COPPER DEPOSITs of Iran and the world. While results of hydrogen analysis existed in FLUID INCLUSIONs of quartz mineral illustrate a range between -88 to -90 per mil, being indicative of a decrease in the amount of mineralizing fluid deuterium. These values are traceable to the effect of meteoric waters, given the propylithic and sodic alterations accompanied with potassic alteration in mentioned veinlet.

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APA: Copy

MOHEBI, A., HEZARKHANI, A., BEHZADI, M., MIRNEJAD, H., & TAGHIZADEH, H.. (2015). STUDY OF MINERALIZING FLUIDS CHARACTERIZATION BY USE OF FLUID INCLUSION AND OXYGEN-HYDROGEN ISOTOPES IN BONDAR HANZA PORPHYRY COPPER DEPOSIT (SOUTHEAST OF KERMAN). GEOSCIENCES, 24(96), 53-64. SID. https://sid.ir/paper/32476/en

Vancouver: Copy

MOHEBI A., HEZARKHANI A., BEHZADI M., MIRNEJAD H., TAGHIZADEH H.. STUDY OF MINERALIZING FLUIDS CHARACTERIZATION BY USE OF FLUID INCLUSION AND OXYGEN-HYDROGEN ISOTOPES IN BONDAR HANZA PORPHYRY COPPER DEPOSIT (SOUTHEAST OF KERMAN). GEOSCIENCES[Internet]. 2015;24(96):53-64. Available from: https://sid.ir/paper/32476/en

IEEE: Copy

A. MOHEBI, A. HEZARKHANI, M. BEHZADI, H. MIRNEJAD, and H. TAGHIZADEH, “STUDY OF MINERALIZING FLUIDS CHARACTERIZATION BY USE OF FLUID INCLUSION AND OXYGEN-HYDROGEN ISOTOPES IN BONDAR HANZA PORPHYRY COPPER DEPOSIT (SOUTHEAST OF KERMAN),” GEOSCIENCES, vol. 24, no. 96, pp. 53–64, 2015, [Online]. Available: https://sid.ir/paper/32476/en

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