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Regional Geology

 

The Jampang Prospect is dominated by sediments of Tertiary age in the western half of the property and Tertiary "old volcanics" in the east. The tertiary age sediments are composed of limestones, marls, calcareous tuffs, sandstones and conglomerates and minor intercaleted tuffs and lavas. The "Old Volacanics" consist of Palaeocene ages andesites and decites. A report prepared by PT Aneka Tambang also notes the occurrence of argillic and propylitic alteration. This type of hydrothermal alteration is often associated with epithermal gold and base metal mineralisation. The presence of quartz veins and silification within the KP application may be associated with epithermal style gold and base metal mineralisation.

 

Geological Map Jampang Area

 

The above geology map of Jampang shows major north and west-north-west structure. At the prospect scale the major structure in the western part of the property is an anticlinal fold with the fold axis trending east-west. Brittle structures generally trending north to north-east and east-west are found in the western part of the property. Any structures in the eastern part of the KP would tend to be obscured by Quarternary volcanic activity.

 

Location, Access, Topography, Vegetation and Climate

 

The property is located about 185 km south of Jakarta on the western side of Java, a journey of between 3 and 4 hours. Access to the property is via sealed roads and the property is served by grid electric power, land-line and fax communication. More inaccessible areas can be reached on dirt road by motorcycle, walking tracks and four wheel drive where the tracks are wide enough. River valleys offer resonable walking access and good rock outcrop exposure. (See Location of the Kp application on the picture 3).

 

The property is situated on the southern edge of the Jate-Miocene to Pliocene-aged Sunda-Banda arc. Gold has been or is being mined at numerous sites within this volcanic arc. There are a number of gold mines within a 100 km radius of Jampang (Cikotok, Cikidang, Cikondang, Gunung Ponkor) but there has been no formal, organised mining at Jampang. However, prior to 1950 the Dutch explored parts of this property by underground edit development and in recent years local miners have been actively mining shallow, soft oxidised mineralisation via a maze of small shafts and tunnels. Their mining is restricted to the ground above the water table.

 

Most of the property has been cleared for agricultural purposes with secondary forest growth predominant in the areas not being utilised. Minor primary rainforest can be found in the northern part of the property. Tea plantations and pine forest plantations can also be found in the area.

 

Annual rainfall is approximately 2500mm per year with the "dry" season from April to October and the "wet" season from November to March. The weather is characterized by hot, humid days and cool to warm nights, depending on height above sea level. The dry season is the best time for fieldwork as creeks tend to be at lower levels and roads are in better state of repair making access easier. Mapping and sampling is also less likely to be disputed by tropical thunderstorms.