Abstract

• The research area is situated in Madaya Township, Mandalay Region which lies on one inch topographic map No.93-B/3. This area is bounded between latitude 22° 11′ N to 22° 14′ N and longitude 96° 33′ E to 96° 35′ E. Pin-le-in and Nyaung-ok area is located between the Shan massif in the east and Tertiary sediment in the west. The regional trends of metamorphic rocks in present area are nearly north-south in direction. Yatkanzin Taung is occupied by metamorphic units, especially marble and calc-silicate rocks. Igneous rocks and metasedimentary rocks mainly distributed in the research area and granitic rocks partly intruded into metasedimentary rocks. Metasedimentary rocks are marbles, calc-silicate rocks and gneisses. Biotite granite is highly weathered in the research area. Hornblende granite is mainly occupied at the eastern part of Bodawgyi Taung range. Marbles can be subdivided into diopside marble, phlogopite marble and white marble. Calc-silicate rocks are interbedded with white marble at Yatkanzin Taung range and it is also interbedded with biotite-hornblende gneiss at Bodawgyi Taung range. Biotite-hornblende gneiss is well exposed at Bodawgyi Taung and it is partly in contact with hornblende granite. Minerals occurred the research area consist of calcite, alkali feldspar, plagioclase, quartz, hornblende, biotite, diopside, phlogopite, sphene, spinel, garnet and scapolite. Contact and regional metamorphism can be observed in this area. According to the mineral assemblages, the regional metamorphism of the research area took place under “amphibolite facies”. The limited occurrences of some gems and industrial minerals can be encountered in the research area. The rough stones of spinel, garnet are found in some marble and pegmatite.