Journal Paper

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Journal: علوم زمین
Year:1390 | Volume:20 | Issue:79
Start Page:47 | End Page:54

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Title

THE SURVEY OF PHYSICAL-CHEMICAL ENVIRONMENT IN SUNGUN COPPER PORPHYRY DEPOSIT WITH THE USING OF MINERAL PROPERTIES IN THE COPPER PORPHYRY DEPOSITS (NORTH EAST OF TABRIZ)

Pages

 Start Page 47 | End Page 54

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Abstract

SUNGUN PORPHYRY COPPER Deposit is located about 130 km to the northeast of Tabriz, northeast IRAN. This deposit contains 796 million tons of ore with 0.61% Cu, 0.01% Mo, 0.016 ppm Au, 9.75 ppm Bi and Re (0.09 wt% of molybdenite). This research studies the physico-chemical environment using the chemical properties of minerals of this deposit. This deposit is related to granodiorite-diorite dikes and granodiorite stock that intruded into sedimentary and volcanic rocks of Cretaceous and Eocene. Dominant alterations are potassic, phyllic, argillic and propylitic from center outward which are characteristics of continental margin PORPHYRY COPPER deposits. Simultaneously with the supergene mineralization, an iron cap of iron oxides, iron hydroxides, COPPER oxides, sulfates, carbonates and COPPER phosphates were developed on top of the deposit and along the fractures. In conclusion, based on mineral chemistry, in 450ºC and 0.5 kb pressure (PT condition of potassic zone), sulfur fugacity and pH is determined to be as: logƒS2=-18 to -24 an pH=2.5 to 7.5. In 350ºC and 0.5 kb pressure (PT condition of phyllic zone), oxygen and sulfur fugacities are: logƒO2=-20 to -33 and logƒS2=-6 to -15.

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