Application of biotite mineral chemistry in estimating of physicochemical conditions of crystallization and emplacement of the Mardehak granitoids, southeast of Jiroft (Jebal-e-Barez)
The Mardehak granitoids within the southeastern part of the Urmieh-Dokhtar magmatic arc, consist of diorite, quartzdiorite, granodiorite, and granite. The biotite composition falls within the annite and siderophyllite fields, plagioclases range from oligoclase to bytownite, and alkali feldspars are classified as orthoclase. The biotites in these rocks vary from Mg-rich (Mg-biotite) to Fe-rich (Fe-biotite) in composition. The biotite composition indicates that these granitoids are calc-alkaline I-type granitoids associated with active continental margin subduction zones. Crystallization and final equilibration conditions of biotites, based on their Ti contents, reveal temperatures and pressures of 545-785°C and 0.30-2.62 kbar, respectively. Thermometry based on feldspar compositions also indicates a temperature range of 650-750°C for the final emplacement of the Mardehak granitoids. Chlorite thermometry, based on the Aliv contents in its structural formula, reveals temperatures of 412-527C with a mean of 470°C, suggesting the formation of this mineral during the later alteration of biotite.
Ghasemi, H., Moradi, R., Saccani, E., Mobasheri, M., & Papadopoulou, L. (2025). Application of biotite mineral chemistry in estimating of physicochemical conditions of crystallization and emplacement of the Mardehak granitoids, southeast of Jiroft (Jebal-e-Barez). Iranian Journal of Crystallography and Mineralogy, (), -. doi: 10.22128/ijcm.2025.2987.0
MLA
Habibollah Ghasemi; Razieh Moradi; Emilio Saccani; Mohsen Mobasheri; Lambrini Papadopoulou. "Application of biotite mineral chemistry in estimating of physicochemical conditions of crystallization and emplacement of the Mardehak granitoids, southeast of Jiroft (Jebal-e-Barez)", Iranian Journal of Crystallography and Mineralogy, , , 2025, -. doi: 10.22128/ijcm.2025.2987.0
HARVARD
Ghasemi, H., Moradi, R., Saccani, E., Mobasheri, M., Papadopoulou, L. (2025). 'Application of biotite mineral chemistry in estimating of physicochemical conditions of crystallization and emplacement of the Mardehak granitoids, southeast of Jiroft (Jebal-e-Barez)', Iranian Journal of Crystallography and Mineralogy, (), pp. -. doi: 10.22128/ijcm.2025.2987.0
VANCOUVER
Ghasemi, H., Moradi, R., Saccani, E., Mobasheri, M., Papadopoulou, L. Application of biotite mineral chemistry in estimating of physicochemical conditions of crystallization and emplacement of the Mardehak granitoids, southeast of Jiroft (Jebal-e-Barez). Iranian Journal of Crystallography and Mineralogy, 2025; (): -. doi: 10.22128/ijcm.2025.2987.0
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