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Zolala, Foroogh, Sadeghian, Mahmood, Alipour-Asll, Masood, Papadopoulou, Lambrini, Mingguo, Zhai, Aravani, Foteini, Zhu, Xiyan. (1404). Petrography, mineral chemistry and geothermobarometry of monzogabbro-monzodiorite intrusions of N-NE Bafq: An approach to understanding of the Ediacaran-Cambrian intracontinental rift in the central part of Iran. , (), -. doi: 10.22059/geope.2025.393863.648816
Foroogh Zolala; Mahmood Sadeghian; Masood Alipour-Asll; Lambrini Papadopoulou; Zhai Mingguo; Foteini Aravani; Xiyan Zhu. "Petrography, mineral chemistry and geothermobarometry of monzogabbro-monzodiorite intrusions of N-NE Bafq: An approach to understanding of the Ediacaran-Cambrian intracontinental rift in the central part of Iran". , , , 1404, -. doi: 10.22059/geope.2025.393863.648816
Zolala, Foroogh, Sadeghian, Mahmood, Alipour-Asll, Masood, Papadopoulou, Lambrini, Mingguo, Zhai, Aravani, Foteini, Zhu, Xiyan. (1404). 'Petrography, mineral chemistry and geothermobarometry of monzogabbro-monzodiorite intrusions of N-NE Bafq: An approach to understanding of the Ediacaran-Cambrian intracontinental rift in the central part of Iran', , (), pp. -. doi: 10.22059/geope.2025.393863.648816
Zolala, Foroogh, Sadeghian, Mahmood, Alipour-Asll, Masood, Papadopoulou, Lambrini, Mingguo, Zhai, Aravani, Foteini, Zhu, Xiyan. Petrography, mineral chemistry and geothermobarometry of monzogabbro-monzodiorite intrusions of N-NE Bafq: An approach to understanding of the Ediacaran-Cambrian intracontinental rift in the central part of Iran. , 1404; (): -. doi: 10.22059/geope.2025.393863.648816

Petrography, mineral chemistry and geothermobarometry of monzogabbro-monzodiorite intrusions of N-NE Bafq: An approach to understanding of the Ediacaran-Cambrian intracontinental rift in the central part of Iran

Geopersia
مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 23 تیر 1404    اصل مقاله (4.18 M)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22059/geope.2025.393863.648816
نویسندگان
Foroogh Zolala1؛ Mahmood Sadeghian* 1؛ Masood Alipour-Asll1؛ Lambrini Papadopoulou2؛ Zhai Mingguo3؛ Foteini Aravani2؛ Xiyan Zhu3
1Petrology and Economic Geology Department, Shahrood University of Technology, Shahrood, Iran
2Department of Mineralogy-Petrology-Economic Geology, School of Geology, Aristotle University, Greece
3Institute of Geology and Geophysics, Chinese Academy of Sciences (CAS), China
چکیده
The study area is located in the N-NE Bafq and the central Iran structural zone. The Rizu-Desu volcano-sedimentary sequence is crosscut by bimodal (basic and felsic) intrusions and dikes, with compositions ranging from monzogabbro to leucogranite. In the monzogabbro-monzodiorite intrusions (540 to 520 Ma) of the investigated region, plagioclase (with a dominant albite-oligoclase composition), pyroxene (diopside and augite), Ca-Fe-Ti-rich amphiboles (magnesiohornblende, tschermakite, Kaersutite, and ferrokaersutite), and biotite (Fe-biotite and Mg-biotite, and also Ti-rich (0.38-1)) are the essential minerals. Apatite, monazite, magnetite, titanomagnetite, titanite (sphene), and zircon are also accessory minerals. Geothermobarometry investigations based on the mineral chemistry of pyroxene, amphibole, and biotite indicate the temperatures of cessation of exchange and final equilibrium of the minerals, mainly covering a temperature range of 1270 to 1140 °C (pyroxenes), 890-790 °C (amphiboles) and 780-745 °C (biotites) (in respectively) and the pressure mainly cover range of 12.33 to 0.5 kbar. Petrological features of the studied rocks are very similar to those of appinite rocks. The parental magmas of monzogabbro-monzodiorite intrusions have mostly an alkaline nature and originated from partial melting of the metasomatized mantle source in an intracontinental rift tectonic setting. The resulting magmas evolved by fractional crystallization, and possibly crustal contamination, then emplaced in the continental crust around the Ediacaran-Cambrian boundary.
کلیدواژه‌ها
Monzogabbro-monzodiorite؛ Mineral chemistry؛ Geothermobarometry؛ Intracontinental rift؛ Bafq
آمار
تعداد مشاهده مقاله: 206
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