TY  - BOOK
AU  - Aye Khaing.
TI  - Geology and lead mineralization of Theingon area, Ywangan township, Shan State (South)
U1  - T-11 M.Sc.  23rd edition,
PY  - 2018///
CY  - Yangon
PB  - University of Yangon
KW  - Geology
KW  - Lead mineralization
KW  - Theingon area
KW  - Ywangan township
KW  - Shan State (South)
N1  - Includes list of figures, list of tables, summary, conclusions, appendices; ASTRACT ___ 
Theingon area is located about 10 kilometres northeast of Ywangon Township Taunggyi District, Shan State (South), and covers approximately 20 square kilometres. It is located in the northwestern part of Pindaya Range that lies in the southwestern part of the Shan Plateau. 
    The sedimentary rocks of the Pindaya Group (Lokepyin Formation, Wunbye Formation, Nan-on Formation) of Ordovician age, and Mibayataung Group (Linwe Formation) of Silurian age cropped out in the study area. Structurally, the Ingyi-Ingaung fault is trending nearly NW-SE. The present research work involves the carbonate rocks of the Wunbye Formation (Middle Ordovicain age ) which hosts the lead ore mineralization, and has seven microfacies, namely, oolitic -dolomitized grainstone, dolomitic limestone, dolostone, crystalline limestone, oolitic-peloidal grainstone, and peloidal-bioclastic wackestone.
     It is found at two localities. Peik Chinganaing Taung and Nwalabot Taung lead prospects are associated with the dolomitic limestone of Wunbye Formation. The lead sulfide mineralization is confined to the carbonate rocks of Wunbye Formation of Middle Ordovician age. Absence of igneous rocks is conspicuous. The wallrock alteration zones are narrow, with dolomitization as the main alteration, and silicification as subordinate, which happen after the ore mineralization. The one mineralogy is relatively simple where galena and barite form major constituents with minor amounts of sphalerite, pyrite, chalcopyrite, covellite and anglesite.The gangue minerals are calcite, dolomite and quartz. Both open-space fillings (veniclets, streaks,disseminations and fracture fillings) and replacement (irregular patches to massive aggregates) nature of ore mineralization are present. The lead sulphide mineralization is localized by both structural and lithostratigraphical controls. 
    Lead values range from 0.108% to 34.22% in Peik Chinganaing Taung and Nwalabot Taung near Theingon village. The contents of zinc range from 0.004% to 0.937% copper ranges from 0% to 0.2250% and barite ranges from 0% to 30.960% .
    Based on the geological, geochemical and mineralogical characteristics, the lead sulphide mineralizations in the study area are carbonate-hosted, stratabound, and epigenetic in origin and may be regarded as one of the sub-type of the Mississippi Valley-Type (MVT) deposits
; Includes references; CONTENTS_ 
ABSTRACT 
ACKNOWLEDGEMENTS 
CONTENTS 
LIST OF FIGURES 
LIST OF TABLES 
ABBREVIATIONS 
CHAPTER 
CHAPTER I : INTRODUCTON 
  1.1 Location, Size and Accessibility 
  1.2 Physiography 
  1.3 Drainage Pattern 
  1.4 Climate and Vegetation 
  1.5 Purposes of Study 
  1.6 Methods of Study 
    1.6.1 Preliminary Investigations 
    1.6.2 Field Methods
    1.6.3 Laboratory Methods 
  1.7 Previous Work 
CHAPTER II : REGIONAL GEOLOGY 
  2.1 Regional Geological Setting 
  2.2 Regional Stratigraphy 
    2.2.1 Chaungmagyi Group 
    2.2.2 Molonhein Group 
    2.2.3 Pindaya Group 
    2.2.4 Mibayataung Group 
    2.2.5 Plateau Limestone Group 
  2.3 Regional Geological Structures 
    2.3.1 Faults 
    2.3.1.1 Sagaing Fault 
    2.3.1.2 Shan scrap Fault 
    2.3.1.3 Kyaukkyan Fault 
   2.3.2 Folds 
   2.3.3 Unconformity 
  2.4 The Structure of Pindaya Range 
CHAPTER III : GEOLOGY OF THE STUDY AREA 
  3.1 Stratigraphy of the Study Area 
    3.1.1 Pindaya Group 
      3.1.1.1 Lokepyin Formation 
      3.1.1.2 Wunbye Formation 
      3.1.1.3 Nan-on Formation 
    3.1.2 Mibayataung Group 
      3.1.2.1 Linwe Formation 
  3.2 Geological Structures 
   3.2.1 Fault 
CHAPTER IV : PETROGRAPHY 
  4.1 General Statement 
  4.2 Lokepyin Formation 
   4.2.1 Siltstone 
  4.3 Wunbye Formation 
   4.3.1 Oolitic-dolomitized Grainstone 
   4.3.2 Dolomitic Limestone
   4.3.3 Dolostone 
   4.3.4 Calcareous Crystalline Limestone 
   4.3.5 Oollitic-peloidal Grainstone 
   4.3.6 Peloidal-bioclastic Wackestone 
   4.3.7 Micrite or Lime Mudstone 
  4.4 Linwe Formation 
   4.4.1 Ferruginous Lime Mudstone 
CHAPTER V : ALTERATION 
  5.1 Alteration in the Study Area 
  5.2 Dolomitization
  5.3 Silicification 
CHAPTER VI : MINERALIZATION 
  6.1 General Statements 
  6.2 Prospects of Lead Mineralization 
  6.3 Relations of Lead ore Mineralization and Host Rock 
  6.4 Ore Mineralogy 
   6.4.1 Galena 
   6.4.2 Anglesite 
   6.4.3 Barite 
   6.4.4 Sphalerite 
   6.4.5 Pyrite 
   6.4.6 Chalcopyrite 
   6.4.7 Covellite 
   6.4.8 Calcite 
   6.4.9 Dolomite 
  6.5 Nature of Mineralization 
  6.6 Ore Controls 
  6.7 Paragenesis 
CHAPTER VII : GEOCHEMICAL INVESTIGATION 
  7.1 General Statements 
  7.2 Statistical Treatment of Geochemical Data in the Lead Prospects - 1 and 2 
  7.3 Distribution of Element Forms from Ore Sample Results in the Study Area 
  7.4 Regression Analysis 
  7.5 Cluster Analysis of Ore Samples (Element Forms) 
  7.6 Distribution Contour Map of Element Forms in the Study area 
CHAPTER VIII : ORE GENESIS AND ORE DEPOSIT TYPE 
  8.1 Ore Genesis on Lead Mineralization
  8.2 Mississippi Valley-Type Deposit 
  8.3 Ore Deposit Type of Theingon Area 
  8.4 Comparison of Ore Characteristics between the Lead Mineralization of the Study Area and Mississippi Valley-Type lead deposits 
  8.5 Recommendation
CHAPTER IX : SUMMARY AND CONCLUSIONS 
REFERENCES 
APPENDICES
; Aye Khaing; Geology and lead mineralization of Theingon area, Ywangan township, Shan State (South)
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