2026-06-25T05:38:43Z https://meral.edu.mm/oai

oai:meral.edu.mm:recid/00012773 2026-06-01T07:07:54Z 1704332280616 1704332280616:1704445069427

Provenance Study of the Miocene Rock Units in the Letpanbya-Taungni Area, Kyaukpadaung Township, Mandalay Region Wai Wai Thin Nay Win Aung Thae Su Win The study area lies in the Letpanbya village, Kyaukpadaung Township, Mandalay Region. It is bounded by North latitude 20° 45ˈ 00" and 20° 50' 00" and East longitude 95°15ˈ00" and 95° 26ˈ 53" in the one-inch topographic map,84P/5. This area is located in the Centeral Volcanic Line (CVL) and the northern continuation of the Bago Yoma. In the study area,Moza and Khabo Formations (Miocene age) are well exposed. They are occurred as Miocene age of Moza and Khabo Formations (Miocene age) (Upper Pegu Group). Moza Formation is composed of the thin to medium-bedded, fine to medium-grained, blueshgrey to buff colour sandstone are interbedded with greenish grey shale and clay. Medium scale planer type cross beddings sometimes with reactivation surface and mud drapes, hummocky cross stratifications are important sedimendary structures. Therefore, the sediments of the formation primary consist of alternating layer of sand and fluid mud, characteristic of tidal flat deposits. Fluid muds are more common in estuarine circulation. Khabo Formation fine to medium-grained and darkgrey to buff color and fairly consolidated sandstone. The Khabo Formation is easily recognizable due to the development of alkaline salts (efflorescence) which can be easily removed with a finger in the stream section. Some of the sandstones are show small cross-lamination, ripple drift cross-lamination, and seasonal bedding. The stratigraphic contact between the Khabo Formation and the Irrawaddy Formation is arbitrarily placed. Moza Formation are composed of 65% to 85 % detrital fragment and 15% to 35% chemical cement. The detrital garins are packed together with the calcite or iron oxide cement. Khabo Formation, about 69 % detrital elements are embedded in the calcite cement having about 30%. Heavy minerals consist of about 1% to 3% in sandstone of Khabo Formation. These are tourmaline, hornblende, pyrite, olivine, diopside and opque minerals. 2025-12-01 https://meral.edu.mm/records/12773