Abstract

• The research area is situated 9.6 km to the Southwest of Ye. The structural trend of research area is generally N-S to NNW-SSE. It is mainly composed of igneous rocks such as diorite, porphyritic biotite granite, biotite granite, biotitemicrogranite, microdiorite dyke and pegmatite dykes. Hypidiomorphic granular texture is found in all units of the research area. In granitic rocks, quartz, orthoclase, biotite and plagioclase are major constituents. Zircon, sphene, apatite and opaque are minor constituents. Feldspar occurs as phenocrysts. Biotite was altered to chlorite along the cleavage planes and some are bent due to deformationin porphyritic biotite granite. Hornblende is the chief mafic mineral in diorite. In microdiorite dyke, biotite is main mafic mineral and altered to chlorite. In IUGS classification, biotite granite and porphyritic biotite granite fall in syeno granite and diorite falls in quartz monzodiorite fields. Igneous rocks can be used as construction and road materials and decorative stones.