SSBU

Includes list of figures, list of tables, economic aspects, summary, conclusion, appendices.

ABSTRACT __The research area, the environs of Bawphyutaung is situated about 17 miles from north of Heho and 2 miles from Bawsaing village, Kalaw Township, Shan State (South). The area is covering about 32 kilometers. The Bawsaing- Heho area is characterized by the rocks of the Molohein Group (Upper Cambrian), Pindaya Group (Ordovician), Mibayataung Group (Silurian) and Plateau Limestone Group (Permocarboniferous). The research area consists mainly two rocks type of Pindaya Group (Ordovician), namely Wunbye Formation and Nan-on Formation. Most of the area is covered by the rocks of the Wunbye Formation. It covers about 95% exposure-wise.Attitude of the rocks are generally trending N-S and dipping to the East. Petrographically,Wunbye Formation can be grouped as (1) Laminated Mudstone, (2) Pelloidal Wackestone, (3) Oolitic Packstone (4) Dolostone. The six elements were analyzed by AAS. They are As, Ag, Cu,Pb, Zn and Fe. There is a good positive correlation all of the pairs. From among the pairs of elements with lead, in rock samples, silver shows a strong positive correlation (+0.873). According to the cluster analysis, Lead is strongly associated with silver and zinc. Lead mineralization in the present study area is restricted to the Ordovician rocks and specially related to the Wunbye formation. Ore minerals are ; Galena, cerrusite, sphalerite, pyrite, chalcopyrite and covellite Gangue minerals are calcite, dolomite and quartz. Disseminated galena occuring in the limestones are also parallel to the bedding. Sphalerite is usually found in association with galena and pyrite. Pyrite and chalcopyrite are occured as small irregular masses. Galena is constantly associated with barite. By the petrographic examination and field observation.alternations are dolomitization, silicification, sericitisation and pyritization. In the study area, lead sulphide mainly occur in Thaungdwin and Phayataung worksites. Lead carbonate are also excavated at the Bawphytaung hill. The veins are trending NNW, NW and EW. Most of the mine site are using square-set stoping and shafting method. The Bawsaing area is famous for its richness in lead mineralization. Nowadays, only lead and barite deposits are extracted commercially. Local villagers are also working in this mine site.










Master. University of Yangon, 2016.

Includes references.

CONTENTS _
ABSTRACT
ACKNOWLEDGEMENTS
LIST OF FIGURES
LIST OF TABLES
CHAPTER-I : INTRODUCTION
1.1 Location, Size and Accessibility
1.2 Scope Objective of the study
1.3 Methods of Study
1.4 Previous Work
1.5 Physiography
1.6 Soil and Vegetation
1.7 Climate
1.8 Drainage Pattern
CHAPTER II : REGIONAL GEOLOGY
2.1 Regional Geologic Setting
2.2 Structure
CHAPTER III : GENERAL GEOLOGY
3.1 General Geology
3.2 Stratigraphic Succession
3.3 Pindaya Group
3.3.1 Wunbye Formation
3.3.2 Nan-on Formation
CHAPTER IV : PETROGRAPHY
4.1 Thin Section Study
4.2 Petrography of Wunbye Formation
4.2.1 Laminated Mudstone (Micritic limestone)
4.2.2 Pelloidal Wackestone ( Pelmicrite)
4.2.3 Oolitic Packstone (Oolitic dolomitic limestone)
4.2.4 Dolostone (Crystalline Carbonate )
4.3 Petrography of Nan-on siltstone
CHAPTER V : GEOCHEMICAL STUDY
5.1 General Statement
5.2 Interpretations of Geochemical Data
5.2.1 Arsenic (As)
5.2.2 Silver (Ag)
5.2.3 Copper (Cu)
5.2.4 Lead (Pb)
5.2.5 Zinc (Zn)
5.2.6 Iron (Fe)
5.3 Geochemical Anomaly
5.3.1 Threshold
5.4 Correlation Coefficients
5.5 Cluster Analysis
5.6 Regression Analysis
CHAPTER VI : MINERALIZATION AND ALTERATION
6.1 Mineralization
6.2 Ore Controls
6.2.1 Lithologic Control
6.2.2 Structural Control
6.3 Lead and its associated ore minerals
6.3.1 Galena
6.3.2 Cerrusite
6.3.3 Sphalerite
6.3.4 Pyrite
6.3.5 Chalcopyrite
6.3.6 Covellite
6.3.7 Barite
6.4 Alteration
6.4.1 Dolomitization
6.4.2 Silicification
6.4.3 Sericitisation
6.4.4 Pyritization
6.5 Paragenesis
CHAPTER VII : MINING METHOD
7.1 Mining Method
7.2 Operating Mines
7.2.1 Lead Sulphide (Galena)
(A) Thaungdwin worksite
(B) Phayataung worksite
7.2.2 Lead Carbonate (Cerrusite)
(A) Thapyapin mine site
(B) Linekyel mine site
(C) Open-pit mine site
7.2.3 Barite
7.3 New Lead Private Companies
7.4 Dressing Factory
CHAPTER VIII : ECONOMIC ASPECTS
CHAPTER IX : SUMMARY AND CONCLUSION
REFERENCES
APPENDICES.
Theingi Moe Pwint. Lead mineralization at Bawphyutaung and Phayataung area, Bawsaing village, Kalaw Township, Southern Shan State /