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Stratigraphy and petrographic investigation of the rock units exposed along Banmaw-Shwegu car road (Zinbon Range), Shwegu Township, Kachin State
- This area is located around ZinbonTaung between Shwegu and Banmaw in the southern Kachin state. Regionally, this area is mainly composed of Quaternary sediments, Irrawaddy Formation and equivalents, flysch-types sediments and limestones, ultrabasic rocks (peridotite and sepertinite). Stratigraphically, four main rocks units were occurred in this research area. These units are; ultramafic and associated rocks, Cretaceous rocks, Tertiary sediments, and Quaternary sediments. Samples are collected from conglomerate rocks (Irrawaddy Formation) on road side at ZinbonTaung located between Shwegu and Banmaw motor road. Selected samples are analyzed to know their mineral composition and to identify their ages from crystallization processes of apatite and zircon minerals. Selected samples are analyzed to identify their ages using zircon and apatite minerals via apatite fission-track (AFT) analysis, (U-Th/He) (AHe and ZHe). Based on the dating processes from apatite and zircon minerals, most of samples are between 7 Ma and 16 Ma in ages. Pebbles of the Irrawaddy Formation of NE-Myanmar, likely Late Miocene-Pliocene coarse fluvial deposits of the Paleo-Irrawaddy, cooled 5-10 Ma later through 60-100°C than the adjacent Mogok belt rocks.
Khin Khin Lin
- Universities Research Journal