TY - JOUR T1 - Geochemistry and tectonic setting of granite-gneisses from Abadchi, north of Shahrekord TT - زمین‌شیمی و محیط زمین‌ساختی گرانیت گنایس‌های آبادچی، شمال شهرکرد JF - ijcmir JO - ijcmir VL - 26 IS - 1 UR - http://ijcm.ir/article-1-1060-en.html Y1 - 2018 SP - 195 EP - 208 KW - Granite-gneiss KW - A-Type granite KW - geochemistry KW - Abadchi KW - Sanandaj-Sirjan Zone. N2 - The granite-gneiss body of Abadchi area (vicinity of Zayandeh-Rud dam) is a part of Sanandaj-Sirjan tectonic zone. The mineralogical composition of the granite- gneisses contains quartz, K-feldspar, plagioclase, biotite and muscovite and minor minerals of opaque, zircon, amphibole and allanite. The granite-gneiss rocks have been influenced by deformation dynamics and weakly Na-metazomatism. Geochemically, these rocks are calcic to calc-alkali, ferroan to magnesian, peraluminous to slightly metaluminous and are A to I-type granitoid. On the bases of chondrite-normalized REE diagram, they show a relatively enrichment in LREES rather than HREES with negative Eu anomalies. On primitive-mantle normalized spider diagrams, the rocks display relatively enrichment in LILE and LREE rather than HFSE which represent the magmatic rocks depending on arc and collision setting. This granite-gneiss is formed in post-collisional tectonic setting. M3 10.29252/ijcm.26.1.195 ER -