New mapping and sampling by Arc Exploration at Jerambah prospect of the Trenggalek project in East Java, Indonesia, have identified two drill targets. The company has started a scout drilling program at the prospect.
The Trenggalek Exploration IUP tenement is held by Arc’s Indonesian partner, PT Sumber Mineral Nusantara (SMN). The tenement, covering an area of 29,969 hectares, is valid until November 2018. Acr is in the process of renewing a forestry permit affecting 3393 hectares within the tenement area.
PT Danusa Tambang Nusantara, a subsidiary of one of the largest contract miners in Indonesia, is managing and funding exploration work at Trenggalek.
Trenggalek lies in the prospective Southern Mountains Province of East Java, which contains the large Tumpangpitu porphyry copper-gold deposit in the Tujuh Bukit district.
Jerambah is about 5km west of Singgahan prospect. It is an extensive 2km by 1.5km silica-clay-pyrite alteration zone centred on igneous intrusions mapped at surface.
Jerambah was tested by a single drill hole during the Anglo-American Joint Venture. The hole was drilled to a depth of 1022 metres and Arc believes that it was drilled on the margin of an anticipated copper-gold system.
Subsequent soil sampling and spectral analyses showed a new cluster of overlapping spotty copper-gold-molybdenum anomalies reporting up to 348 ppm copper, 0.095 ppm gold and 59 ppm molybdenum to the north of the drill hole.
In recent months this area was re-mapped and resampled on a more detailed basis with Induced Polarisation (IP) and ground magnetic surveys conducted. This work identified outcrops of diorite with quartz-sericite-(chlorite) alteration and quartz stockworks.
The IP and magnetic results combined with re-interpretation of aeromagnetic data, spectral analyses, re-mapping and re-sampling of the area have identified two drill targets.