Robust Resources (ASX: ROL) has two large multi-commodity projects in Indonesia on Romang Island, both concentrated on volcanic centres. Robust is exploring prospective ground previously owned by Billiton during the 1990s, and the Ashton Mining Group using owner-operated drilling rigs.
Lakuwahi, in the south of Romang, has near-surface gold and silver, while a significant poly metallic base metal discovery also exists with thick intersections of economic base metals underlying the gold and silver deposit. At the North Romang Project, initial exploration has demonstrated a porphyry system with a focus on gold and silver.
Robust Resources shares spike on record 82.5M gold-silver zone
Robust Resources (ASX: ROL), the Indonesian-based gold and base metal explorer, has announced final assay results for a further four diamond drill holes at its Lakuwahi Caldera Project on Romang Island.
All four holes encountered precious metal and/or base metal mineralisation of potentially economic grades and widths, significantly extending the identified zones of mineralisation.
The outstanding result came from hole LWD 062 in the Batu Mas Prospect area. This hole intersected gold and silver mineralisation over a drilled width of 82.5 metres which is the widest intersection encountered by Robust in sixteen months of drilling to date.
The location of this hole is significant in that it demonstrates increasing strength of mineralisation moving south and east from previous successful drill holes and indicates a large area of untested potential.
Final assay results received from hole LWD 062 include: 82.5 metres at 1.59 g/t Au equivalent (1.05 g/t Au and 34 g/t Ag) from 1.5 metres, including 11.5 metres at 3.07 g/t Au equivalent (1.35 g/t Au and 114 g/t Ag) from 22.5 metres, and 13 metres at 3.72 g/t Au equivalent (2.99 g/t Au and 44 g/t Ag) from 59 metres.
Managing Director Gary Lewis said, "the results of the four drill holes released today continue the near perfect hit rate for Robust’s drilling at both Batu Mas and Batu Hitam. The record result at Batu Mas in hole LWD 062 provides the Company with a good indication as to additional areas of untested potential in this outstanding prospect."
"The results of the 3D IP/Resistivity programme will become available progressively over the next 3 months and will guide us in identifying new areas for further exploration, assisting us greatly in unlocking the true potential of the giant 6Km x 4Km Lakuwahi Project," he added.
The company also said at Batu Mas, diamond drill hole LWD 058 intersected a thick zone of zinc (Zn), lead (Pb), copper (Cu), gold and silver mineralised breccia where a relatively rich gold and silver zone overlies a thick accumulation of base metals.
This hole is situated in the north-eastern most extremity of the Batu Mas drilling and the results are consistent with nearby holes, including previously reported LWD 055, indicating that the mineralising system remains strong and open in this direction.
A summary of LWD 058 is as follows: 13 metres at 1.00 g/t Au Equivalent (0.60 g/t Au and 24 g/t Ag) from 11 metres, 86 metres at 1.6% combined Zn + Pb + Cu from 31 metres, including 8 metres at 5.0% combined Zn + Pb + Cu from 36 metres.
Drilling continues at Batu Mas with 2 diamond drill rigs on site to further extend the defined mineralisation, while the company’s fourth rig is in commissioning stage and is expected to be active on site next month.
Five additional holes from Batu Mas are in various stages of preparation and sample transport.
At Batu Hitam drilling continues to encounter thick zones of polymetallic breccia mineralisation. The latest results include hole LWD 063 which intersected a broad zone of base metal-rich breccia grading 2.0% combined Zn + Pb + Cu over 72 metres, containing higher grade intervals such as 9 metres at 4.3% combined Zn + Pb + Cu.
Hole LWD 063 also intersected precious metals grading 1.72 g/t Au Equivalent over 9.5 metres and an upper, lead-rich zone, associated with intensely manganese-replaced limestone which grades 5.1% combined Zn + Pb + Cu over 3.2 metres.
Hole LWD 063 is situated 50 metres to the north of hole LWD 042 which intersected 41 metres at 2.8% combined Zn + Pb + Cu and 51 metres at 1.57 g/t Au Equivalent.
Summary results from LWD 063 are as follows: 3.2 metres at 5.1% combined Zn + Pb + Cu from surface, 9.5 metres at 1.72 g/t Au Equivalent (0.48 g/t Au and 75 g/t Ag) from 8 metres, 72 metres at 2.0% combined Zn + Pb + Cu from 19.5 metres, including 26 metres at 3.1% combined Zn + Pb + Cu from 31.5 metres, including 9 metres at 4.4% combined Zn + Pb + Cu from 41.5 metres.
Hole LWD 059, also in the north eastern extremity of the Batu Hitam drilling intersected two zones of polymetallic breccia; details are as follows: 4.5 metres at 2.8% combined Zn + Pb + Cu from 3 metres, 18 metres at 2.8% combined Zn + Pb + Cu from 50.5 metres, including 8 metres at 3.9% combined Zn + Pb + Cu from 56.5 metres.
The lead-rich intersection in hole LWD 059 is associated with intensely manganese-replaced limestone.
The results from LWD 059 and LWD 063 indicate that mineralisation in the north and east of Batu Hitam remains very strong. Further exploration of the potential in these directions is planned with one diamond drill rig operating continuously on this prospect.
Gary Lewis continued, “the second quarter is shaping up to be an exciting one for Robust as we continue to accelerate the exploration programme on Romang Island."
"The recently purchased company boat has now commenced regular operation, which greatly enhances logistic and personnel movements to and from the Island.
In addition, Golder Associates, will be arriving on Romang next month to work alongside the company’s technical team to audit field procedures and Quality Assurance Quality Control (QAQC) systems as a precursor to mineral resource estimation work," he said.
"Combined with our continuing efforts in the north of Romang in the Solat Caldera, we look forward to providing shareholders regular updates from this exciting Project."
Robust Resources shares were trading 20% higher in early trading.
