High grade copper at Lipi zone, Central Jampang project: Augur
Tuesday, September 28 2010 - 04:28 AM WIB
Holes JADD16 to JADD24 were drilled in the main Lipi mineralised zone. Each of these holes with the exception of JADD22 intersected a number of gold bearing hydrothermal breccia zones and/or quartz veins.
Importantly, holes JADD24 and JADD19 intersected significant copper mineralisation.
The results from hole JADD24 included three zones of significant mineralisation including a very shallow intersect of 8.1 metres at 1.05 g/t gold, 6.04 g/t silver and 0.39% copper from 9.0 metres depth. Two zones of high grade copper mineralisation were intersected deeper in the hole:
15.0 metres at 0.90 g/t gold, 18.64 g/t silver and 2.01% copper from 84.0 metres, including:- 7.1 metres at 1.40 g/t gold, 41.23 g/t silver and 3.91% copper from 85.9 metres
13.6 metres at 0.97 g/t gold, 14.88 g/t silver and 2.26% copper from 103.9 metres, including:- 5.1 metres at 1.04 g/t gold, 33.76 g/t.silver and 5.79% copper from 103.9 metres.
The higher grade copper zones are associated with quartz veins and breccia zones.
The results from JADD19 included 14.5 metres at 1.46 g/t gold, 8.11 g/t silver and 0.52% copper from 142 metres. Mineralisation is logged as being within a steeply dipping zone of intense silicification with extensive quartz veining. The host rock is altered andesite with copper and base metals occurring as disseminations in the andesite or within quartz veining. A furtherzone of 3.0 metres at 1.66 g/t gold, 18.0 g/t silver, 0.92% copper and 1.13% zinc from 171.0 metres is associated with an intensely altered hydrothermal breccia and a fault zone.
Hole JADD18 was drilled approximately 50.0 metres to the west of hole JADD19. This hole intersected two zones of mineralisation which consisted of 8.8 metres at 1.48 g/t gold, 1.77 g/t silver from 11.5 metres depth and 6.3 metres at 0.75 g/t gold,
3.34 g/t silver and 0.19% copper from 59.8 metres. Again these mineralised zones are thought to be hosted within a steeply dipping andesite host. Zones of hydrothermal altered breccias were also noted.
Holes JADD18 and JADD19 are indicating continuity of the mineralised zone with depth. This is consistent with the historical drilling in this zone. Increasing copper with depth of the mineralised zones is significant as this maybe indicating further significant gold and copper mineralisation at depth.
Hole JADD20 intersected four shallow gold zones which included 4.3 metres at 4.46 g/t gold from 22.8 metres depth and 8.8 metres at 1.34 g/t gold from 62.8 metres depth.
Holes JADD16 and JADD17 were drilled on the eastern side ot the known Lipi deposit. Hole JADDI6 intersected three zones of mineralisation supporting the interpretation of multiple gold bearing zones at Lipi.
Significant intersections in JADD16 included 7.0 metres at 1.18 g/t gold and 1.54 g/t silver from 6.5 metres, a further 5.0 metres at 1.02 g/t gold and 1.56 g/t silver from 57.8 metres and a further 5.8 metres at 1.16 g/t gold and 1.98 g/t silver from 123.0 metres.
Hole JADD17 intersected multiple narrow gold bearing zones including 1.5 metres at 2.31 g/t gold and 5.53 g/t silver from 31.0 metres, 1.0 metre at 3.98 g/t gold from 120.0 metres and 2.2 metres at 1.00 g/t gold, 14.36 g/t silver and 0.75% copper from 140.6 metres.
Hole JADD23 intersected three zones of anomalous gold and weakly anomalous copper. A 19.5 metre interval from 31.0 metres depth returned 0.68 g/t gold and 0.15% copper. A zone of 5.1 metres returned 0.68 g/t gold and 3.44 g/t silver from 109.0 metres and a further zone of 17.0 metres at 0.58 g/t gold, 5.77 g/t silver and 0.35% copper were intersected from 139.0 metres.
The drilling results continue to support the notion of extensive gold mineralisation at Lipi. The steeply dipping gold and gold-copper mineralised zones have generally not been closed off at depth and results are indicating that grade and in some cases width are increasing with depth. Copper mineralisation continues to appear to be increasing both in a southward direction and with depth.
Due to the nature and style of the mineralisation and the extent of alteration further zones of mineralisation to the east and west of the Lipi deposit may exist beneath the shallow ash cover.
Current Activities
Drilling continues at Lipi. Four shallow holes between Lipi and Lipi North have been drilled and are awaiting analysis.
An induced polarisation survey has commenced with the aim of identifying unexposed silicified zones. Silicified zones are potential targets for gold mineralisation.
The current drilling program is part of a detailed drill program, which is aimed at defining an initial JORC compliant resource by late 2010. The resource is expected to include mineralisation within the Lipi and Puteran-Simpang prospects.
In addition, the planning of initial metallurgical testing has commenced. (end of edited release)