Geology and mineralisation of the Mewet Vein, Jelai Gold Project ...

PT GMT Indonesia
Mewet Vein : Jelai Gold Project
TABLE OF CONTENTS
1 SUMMARY ......................................................................................................................... 7
2 INTRODUCTION ................................................................................................................ 8
3 PROPERTY DESCRIPTION ............................................................................................ 10
3.1 Location .....................................................................................................................10
3.2 Tenure .......................................................................................................................10
4 PROJECT ENVIRONMENT ............................................................................................. 12
4.1 Access .......................................................................................................................12
4.2 Climate ......................................................................................................................12
4.3 Existing Infrastructure ................................................................................................12
4.4 Physiography .............................................................................................................14
5 HISTORY ......................................................................................................................... 15
5.1 Pre-Indochina Exploration..........................................................................................15
5.2 Indochina Goldfields Exploration................................................................................15
6 GEOLOGICAL SETTING ................................................................................................. 17
6.1 Regional Geology ......................................................................................................17
6.1.1 Tectonic History .....................................................................................................17
6.2 Stratigraphy ...............................................................................................................17
6.2.1 Late Cretaceous - Early Eocene ............................................................................17
6.2.2 Late Oligocene-Early Miocene ...............................................................................18
6.3 Regional Structure .....................................................................................................18
6.4 Description of Lithologies in the Project Area .............................................................18
6.4.1 Andesitic Lava .......................................................................................................18
6.4.2 Andesite Intrusives ................................................................................................19
6.4.3 Andesitic Basalt .....................................................................................................19
6.4.4 Lithic Tuffs .............................................................................................................19
6.4.5 Dacite Porphyry .....................................................................................................19
6.4.6 Rhyolite .................................................................................................................19
6.4.7 Menterang Formation Sediments ...........................................................................21
7 MINERALIZATION ........................................................................................................... 22
7.1 Deposit Types............................................................................................................22
7.2 Mewet Vein Geology..................................................................................................22
7.2.1 General Geology ....................................................................................................22
7.2.2 Mineralisation ........................................................................................................22
7.2.3 Alteration ...............................................................................................................23
7.3 Interpreted Genesis of the Epithermal Veins ..............................................................23
8 EXPLORATION ................................................................................................................ 25
8.1 PT Jelai Cahaya Minerals Exploration .......................................................................25
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