Abstract: Based on the thin-section identification and the heavy mineral analysis, including the clastic component observation and relative percent content estimation as well as the ZTR index feature, it is suggested that the sediments (clastic rocks) of the Eocene in Shwebo basin in Myanmar are seldom affected by the volcanic facies provenance from Shan plateau in eastern Shwebo basin, which are characterized by a short-distance transportation. Based on the types of clastics and heavy mineral associations, the parent rocks of Block X are of two types: mica schist and mica quartz schist of metamorphic rocks, intermediate-acid hypabyssal intrusive rocks.

Key words: Myanmar, Shwebo basin, Eocene, heavy mineral, provenance analysis