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  1. University of Yangon
  2. Department of Geology

Evaluating the Geochemical Characteristics, Fluid Evolution and Ore Genesis of Gold and Associated Mineralization at Legyin Gold Deposit, Southern Bamauk, Sagaing Region, Myanmar

https://meral.edu.mm/records/9418
https://meral.edu.mm/records/9418
0e40ed44-2041-4ca3-9d39-eb2633e4b3bd
9174c076-b97a-4a31-af9e-2ee34264ca41
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Journal article
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Publication
Title
Title Evaluating the Geochemical Characteristics, Fluid Evolution and Ore Genesis of Gold and Associated Mineralization at Legyin Gold Deposit, Southern Bamauk, Sagaing Region, Myanmar
Language en
Authors
May Thwe Aye
Day Wa Aung
Wai Yan Lei Aung
Kyi Nwe Nwe Aung
Description
Abstract
Several primary gold deposits are found in Sagaing Region, northern Myanmar. Legyin gold deposit is located in Kawlin-Wuntho Block of the Central Magmatic Volcanic Belt (CMVB). The exposed rock units are andesite (Mawgyi Andesite) of Cretaceous age, mudstone and phyllite (Shwedaung Formation, Upper Triassic), sandstone (Wabochaung Formation) of Miocene age and granodiorite of Mesozoic and Paleogene age. The gold mineralization is mainly hosted by Mawgyi andesite. The aim of this study is to evaluate the geochemical characterisitcs, fluid evolution, ore genesis of gold and associated mineralization at Legyin gold deposit. Based on the mineral assemblages and cross-cutting relationship, two types of veins are recognized. Sericite, epidote, calcite and chlorite are the main alteration minerals. Atomic Absorption Spectrum (AAS) results show the potential of gold range from 0.1 to 2.6ppm. Three types of fluids inclusions were identified. The measured fluid inclusions are 185◦C and 28 bars, 170 ◦C and 26 bars, and 150 ◦C and 20 bars with correspondence to the depth of 300 m, 280 m, and 210 m, respectively. Based on the geological investigation, ore mineralogy, the alteration mineral assemblages, the nature of mineralization and the ore forming fluids, the gold and associated mineralization from the Legyin gold deposit can be recommended as epithermal type deposit.
Keywords: Epithermal deposit, Mawgyi andesite, fluid inclusion, Legyin
Keywords
Epithermal deposit, Mawgyi andesite, fluid inclusion, Legyin prospect, Sagaing Region
Journal articles
2023
Journal of the Asia Research Centre, University of Yangon
39-46
Vol.9, No.1 & 2, 2023
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