Geothermometry of Zirconium in Rutil- bearing Quartz Veins, Surian Volcano-Sedimentary Complex

Authors

Department of Earth Sciences, College of Sciences, Shiraz University, Shiraz

Abstract

    Temperature sensitive elements such as high field strength elements (HFSEs) are valuable for calculation of temperature in the particular geologic systems. Experiments show that the metamorphic temperature is significantly correlated with the concentration of Zr in the rutile mineral. Based on Electron Probe Micro-Analysis (EPMA), this research focuses on the rutile geothermometry in quartz veins during the metamorphism process (ca. 187 Ma) in the Mazayjan and Dideh-Banki regions within the Surian volcano-sedimentary complex. The Zr-in-rutile geothermometer calculated with three different equations. Calculations indicate that the maximum metamorphic temperature occurred in the range of 640 to 690°C at the pressure of 9.5 kbar. These values are consistent with the prograde metamorphic event during the early Cimmerian discordance recorded the onset of the compression and related to the peak of metamorphism (amphibolite facies) in the southern margin of Sanandaj–Sirjan metamorphic belt. The results reveal that the thermal gradient decrease gradually from southeast (Mazayjan) toward northwest (Dideh-Banki) of the surian complex.
 

Keywords


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