Arc: Scout drilling commences at Jerambah prospect
Thursday, October 19 2017 - 02:30 AM WIB
ASX-listed Arc Exploration Limited (ARX) announced Thursday that scout drilling has commenced at the Jerambah prospect within its Trenggalek gold project in Indonesia?s East Java Province.
The company said in an update statement that the scout drilling follows completion of induced polarization and ground magnetic survey at the Jerambah prospect.
These results, combined with re-interpretation of aeromagnetic data, spectral analyses, re-mapping and re-sampling of the area have identified two drill targets.
?Danusa has advised that scout drilling has commenced to test these targets,? Arc said, referring to PT Danusa Tambang Nusantara, a subsidiary of one of the largest contract miners in Indonesia, which is currently managing and funding exploration work at Trenggalek.
The Trenggalek project lies in the prospective Southern Mountains Province of East Java, which contains the large Tumpangpitu porphyry copper-gold deposit in the Tujuh Bukit district.
The Trenggalek Exploration IUP tenement is held by Arc?s Indonesian partner, PT Sumber Mineral Nusantara. The tenement, covering an area of 29,969 ha or about 300 km2, is valid until November 2018.
The company is in the process of renewing a forestry permit affecting 3,393 ha within the tenement area.
The Jerambah prospect is located about 5 km west of Singgahan prospect. It is an extensive 2km by 1.5km silica-clay-pyrite alteration zone centered on igneous intrusions mapped at surface. Jerambah was tested by a single drill hole during the Anglo-American Joint Venture.
In more recent months this area was re-mapped and resampled on a more detailed basis and a combined Induced Polarization (IP) and ground magnetic surveys were conducted.
Detailed re-mapping and re-sampling of the Jerambah Prospect was conducted from early July 2017 during which time outcrops of diorite with quartz-sericite-(chlorite) alteration and quartz stockworks were identified (assaying 0.15% Cu and 0.15g/t Au).
Alteration zones were mapped with the aid of Terraspec machine. An Induced Polarisation survey conducted undertaken in July and August 2017 along 10 lines using a 50m dipole spacing with 2 additional lines using a 200m dipole spacing to obtain a deeper profile. IP pseudo-sections show continuous chargeability anomaly of > 30 ms with medium resistivity of 150 ohm-m covered by what is interpreted to be advanced argillic volcaniclastic unit.
The Ground magnetic survey confirmed the mapping results that the area is dominated by dioritic rocks with a strong NW-SE structural control.
The Induced Polarisation and Ground Magnetic results combined with re-interpretation of aeromagnetic data, spectral analyses, re-mapping and re-sampling of the area have identified two drill targets.
Editing by Reiner Simanjuntak