Modal analysis using scanning X-ray analytical microscope and image processing and analyzing softwares

Ueki, Tadamasa; Niwa, Masakazu   

Conventional point counting method for modal analysis is time-consuming, and often affected by measurer's skill and subjective view on the determination of minerals. We introduce the alternate method using scanning X-ray analytical microscope and image processing and analyzing softwares. This method is simple and not affected by measurer's skill and subjective view. By using this method for thin sections or polished slabs of granitic rocks, we provided clear images showing mineral distributions and obtained objective data of modal compositions efficiently and quickly.