The Smilyan granite (43 Ma) is situated in the southeastern part of the Central Rhodope massif in the metamorphic rocks of the Madan unit from the southern part of the Central Rhodope. Struc, tures of magmatic foliation and imposed ductile de, formation in the Smilyan granite in vertical zones with parallel arrangement of rock forming minerals suggest a presence of a shear zone controlling gran, ite intrusion. This study gives information about chemical composition of rock forming minerals and ductile deformation microstructures in selected sam, ples from the Smilyan granite. The results show nor, mal magmatic trend of plagioclase (decreasing An) and potassium feldspar (decreasing Ab) crystalliza, tion both in not deformed and deformed granite sam, ples. The ductile deformation re, crystallization con, tinues the same trend direction. Two, feldspar ther, mometry estimates give~ 600 С/5 kbar in not de, formed granites and~ 550 С/5 kbar in deformed ones for feldspar pairs including large grain cores. Per, thite exolution in potassium feldspar causes clear trend of Ab, composition lowering and low crystalli, zation temperature of small feldspar grains (370–400 С/3–5 kbar). The results suggest thermal re, equi, libriation at subsolidus conditions.