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Petrography and Petrogenesis of Basalt exposed at Kyaukka, Kyiwin and Taungtalone Taung Area, Ayardaw and Monywa Townships, Sagaing Region
- The three localities of basalt exposed in the study areas is underlied by the Peguans and Irrawaddians. The ratio of CaO/Al2O3 (0.873 for samples KK 1-3; 0.965 for samples TT 1-3; 1.048 for samples KW 1-3) suggests that the basalts from the study areas are produced by the smallest extents and lowest pressure of melting. Laboratory data and field works reveal that Kyaukka and Taungtalone basalts would be considered alkaline, approximately whereas the Kyiwin basalt would be subalkaline more or less. This is pointed out that there are two distinct sources of magmas. Therefore, it may be concluded all basalt samples from the study areas are not produced at the same source. It is likely that the Kyaukka, Taungtalone and Kyiwin basalts are products of transitional condition from alkali olivine basalt to tholeiitic basalt type.
Aung Khin Soe
Soe Moe Aung
- Monywa University Research Journal