Isotope geology of the bakircay porphyry copper prospect,northern turkey |
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| Authors: | R P Taylor |
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| Institution: | (1) Department of Geology, Memorial University of Newfoundland, St. John's, Newfoundland, Canada |
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| Abstract: | Isotopic data for the Bakircay granodiorite porphyry, give a Late Eocene age for the development of the porphyry copper system. They suggest a close temporal and genetic relationship between igneous and hydrothermal activity, and indicate that magmatic-hydrothermal fluids produced potassic alteration and that meteoric fluids enriched in radiogenic87Sr were responsible for propylitic alteration. The granodiorite porphyry is petrologically similar to porphyry copper-related intrusions from island arc and continental margin settings, which form a group with initial87Sr/86Sr ratios of less than 0. 7043, representing magmas produced in tectonic environments lacking any important component of old (i. e. Precambrian) continental material. |
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