It can be concluded that the studiedplutons were emplaced at mid to shallow crustal depths (~4-15 km).
📌 3 Key Takeaways
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Objective & Hypothesis:In this study, the petrography, mineral chemistry and crystallization conditions were reported forthe Alemdar and Işıkdere plutons located in limited areas in the south of the Eastern Pontides.These plutons, which trend mostly in NE-SW directions, were emplaced by cutting the EarlyMiddle Carboniferous-aged Gümüşhane Granitoid and Early-Middle Jurassic Şenköy formation.Petrographically, the studied plutons are compositionally fine to medium grained quartz-diorite,quartz monzodiorite and tonalite.
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Key Findings & Data:The rocks in the plutons have granular, poikilitic, monzonitic,graphic and rare porphyritic textures with consist of plagioclase, (An05-92), hornblende (Mg# = 0.52-0.81), biotite (Mg# = 0.32-0.67), orthoclase, quartz and Fe-Ti oxide.
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Conclusion & Impact:It can be concluded that the studiedplutons were emplaced at mid to shallow crustal depths (~4-15 km).
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters
Abstract
In this study, the petrography, mineral chemistry and crystallization conditions were reported forthe Alemdar and Işıkdere plutons located in limited areas in the south of the Eastern Pontides.These plutons, which trend mostly in NE-SW directions, were emplaced by cutting the EarlyMiddle Carboniferous-aged Gümüşhane Granitoid and Early-Middle Jurassic Şenköy formation.Petrographically, the studied plutons are compositionally fine to medium grained quartz-diorite,quartz monzodiorite and tonalite. The rocks in the plutons have granular, poikilitic, monzonitic,graphic and rare porphyritic textures with consist of plagioclase, (An05-92), hornblende (Mg# = 0.52-0.81), biotite (Mg# = 0.32-0.67), orthoclase, quartz and Fe-Ti oxide. According to thermobarometriccalculations, plutons have crystallization temperatures, pressures and oxygen fugacity valuesranging from 541°C to 938°C, 0.1 to 4.4 kbar, and -23 to-12, respectively. The estimated watercontent calculated from amphibole is between 4.4 to 7.8%. It can be concluded that the studiedplutons were emplaced at mid to shallow crustal depths (~4-15 km).
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Cite This Article
AYDINÇAKIR, E., GÜNDÜZ, R., YÜCEL, C. (2022). Emplacement conditions of magma(s) forming Jurassic plutonic rocks in Gümüşhane (Eastern Pontides, Turkey). Bulletin of the mineral research and exploration, Cilt: 0 - Sayı: 162, 175–196. https://ajindex.com/articles/469380
Ague, J.J. 1997. Thermodynamic calculation of emplacement pressures for batholithic rocks, California: implications for the aluminum-inhornblende barometer. Geology 25, 563-566.
Ağar, U. 1977. Demirözü (Bayburt) ve Köse (Kelkit) Bölgesinin Jeolojisi. Doktora Tezi, İstanbul Üniversitesi, İstanbul (unpublished). Altherr, R., Topuz, G., Siebel, W., Şen, C., Meyer, H.P., Satır, M. 2008. Geochemical and Sr-Nd-Pb isotopic characteristics of Paleocene plagioleucitites from the Eastern Pontides (NE Turkey). Lithos 105, 149-161.
Anderson, J.L. 1996. Status of thermobarometry in granitic batholiths. Trans Royal Society Edinburgh, Earth Sciences 87, 125–138.
Anderson, J.L., Smith, D.R. 1995. The effects of temperature and ƒO2 on the Al-inhornblende barometer. American Mineralogist 80, 549–559.
Arslan, M., Aslan, Z. 2006. Mineralogy, petrography and whole-rock geochemistry of the Tertiary granitic intrusions in the eastern Pontides, Turkey. Journal of Asian Earth Sciences 27, 177-193.
Arslan, M., Temizel, İ., Abdioğlu, E., Kolaylı, H., Yücel, C., Boztuğ, D., Şen, C. 2013. 40Ar-Ar dating, whole-rock and Sr-Nd-Pb isotope geochemistry of post-collisional Eocene volcanic rocks in the southern part of the Eastern Pontides (NE Turkey): Implications for magma evolution in extension induced origin. Contribution to Mineralogy and Petrology 166, 113-142.
Aslan, Z. 2010. U-Pb zircon SHRIMP age, geochemical and petrographical characteristics of tuffs within calcalkaline Eocene volcanics around Gümüşhane (NE Turkey), Eastern Pontides. Neues Jahrbuch für Mineralogie Abhandlungen 187, 329-346.
Aslan, Z., Arslan, M., Temizel, İ., Kaygusuz, A. 2014. K-Ar dating, whole-rock and Sr-Nd isotope geochemistry of calc-alkaline volcanic rocks around the Gümüşhane area: implications for post-collisional volcanism in the Eastern Pontides, Northeast Turkey. Mineralogy and Petrology 108, 245-267.
Aydın, F. 2014. Geochronology, geochemistry, and petrogenesis of the Maçka subvolcanic intrusions: implications for the late Cretaceous magmatic and geodynamic evolution of the eastern part of the Sakarya zone, northeastern Turkey. International Geology Review 56, 1246-1275.
Aydın, F., Karslı, O., Chen, B. 2008. Petrogenesis of the Neogene alkaline volcanics with implications for post collisional lithospheric thinning of the Eastern Pontides, NE Turkey. Lithos 104, 249-266.
Aydınçakır, E. 2014. The Petrogenesis of Early-Eocene non adakitic volcanism in NE Turkey: Constraints on geodynamic implications. L