GEOLOGY AN PETROGRAPHY OF IGNEOS ROCKS IN ANIN AREA, YE TOWNSHIP
Abstract
- The study area is located in the northwestern part of Ye Township, Mon State. The area coverage is about 35.84 square kilometres in one inch topographic map No. 95 E/15. The igneous rock units are generally trending NNW-SSE. Diorite is found along the shore-line. Porphyritic biotite granite is the most abundant rock type and well exposed in the central part. Biotite granite is second abundant rock type. It occurs in the southern part of the study area. Biotite microgranite exposed at the Phalaing Taung. Microdiorite is found as dyke which intruding the porphyritic biotite granite. Lamprophyre dyke is intruding porphyritic biotite granite and biotite microgranite. Quartzofeldspathic vein and quartz vein are also intruding older rock units. Hypidiomorphic granular texture is found occurs in diorite, porphyritic biotite granite, biotite granite and biotite microgranite. Panidiomorphic granular texture is observed in lamprophyre. Quartz, orthoclase, microcline and biotite are major components in granitic rocks. Muscovite, zircon, apatite, epidote, sphene and magnetite are found as accessory minerals. According to modal analysis of I.U.G.S classification diagram, diorite falls in the quartz-monzodiorite field. Porphyritic biotite granite, and biotite granite, and biotite microgranite falls in the syenogranite and monzo-granite fields. Igneous rocks can be used as decorative stones, construction and road materials.
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Year
- 2018
Author
-
Su Latt Mon
Subject
- Geog Geol
Publisher
- Myanmar Academy of Arts and Science (MAAS)