Mineral chemistry and thermobarometry of Eocene monzogabbroic stocks from the Bafra (Samsun) area in Turkey: implications for disequilibrium crystallization and emplacement conditions
作者： İrfan Temizel , Mehmet Arslan , Emel Abdioğlu , Cem Yücel
DOI: 10.1080/00206814.2014.933363
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摘要: Monzogabbro stocks including felsic enclaves (monzosyenite) around the Bafra (Samsun) area at western edge of Eastern Pontides cut Eocene-aged volcanic and sedimentary units. The monzogabbros contain plagioclase, alkali feldspar, clinopyroxene, olivine, hornblende, biotite, apatite, iron-titanium oxides, whereas oxides. Mineral chemistry data suggest that magmas experienced hydrous anhydrous crystallization in deep shallow crustal magma chambers. Several thermobarometers were used to estimate temperatures emplacement for mafic magmas. Clinopyroxene thermobarometry yielded 1100–1232 C 5.9–8.1 kbar monzogabbros, 931–1109 1.8–6.9 enclaves. Hornblende oxygen fugacity estimates reveal 739–971°C, 7.0–9.2 10−9.71 681–928°C, 3.0–6.1 10−11.34 en...
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