220m Wide Gold Zone With Infill Drilling at Namdini
Perth, May 31, 2016 AEST (ABN Newswire) - Cardinal Resources Limited (
ASX:CDV) announces the results of a further two diamond drill holes, NMDD374-721 and NMDD372-741, recently completed on the Namdini Project ("Namdini") (Figure 1, see link below).
Highlights:
- Wide gold mineralised zone of 220m with infill diamond drilling
- Significant gold mineralised intersections within this section include:
-- 59m @ 1.42 g/t
-- 30m @ 1.20 g/t
-- 15.5m @ 1.70 g/t
-- 9m @ 3.44 g/t
-- 4m @ 3.97 g/t
The gold potential of the Namdini Project continues to be confirmed by the intersection of long mineralised zones, including 59m @ 1.42 g/t and 30m @ 1.20 g/t, as well as high grade gold zones of 9m @ 3.44 g/t and 4m @ 3.97 g/t within these two diamond drill holes.
Infill diamond drill holes NMDD374-721 and NMDD372-741 have enabled Section D to be compiled with a 220m wide gold mineralised zone (Figure 2, see link below). This mineralised section confirms the continuation of wide gold mineralisation both at depth and along strike within the Namdini Project.
The volcaniclastics intersected in both diamond drill holes are mineralised throughout which confirm that gold mineralisation is consistently being intersected along strike and at depth.
Infill diamond drilling is being done at 50m spacings between previous 100m spaced diamond drill sections to confirm and enhance the gold mineralisation previously intersected within the volcaniclastics, granitoids and diorites (Figure 1).
Currently the Cardinal drill rig and two contract drill rigs are on site drilling holes NMDD489-779, NMDD346-715 and NMDD346-733. Assay results are pending from 14 drill holes, which should shortly provide a constant flow of results (Figure 1).
NMDD374-721 intersected 208m of gold mineralisation within hydrothermally altered volcaniclastics from 48m to 256m vertical depths with multiple zones of mineralisation down the drill hole, including 4m @ 3.97 g/t, 30m @ 1.20 g/t and 59m @ 1.42 g/t, confirming continuity of mineralisation with depth (Figures 2 and 3, see link below).
NMDD372-741 intersected 161m of mineralisation within hydrothermally altered volcaniclastics from 5m to 166m vertical depths, including 15.5m @ 1.70 g/t and 9m @ 3.44 g/t confirming continuity of mineralisation with depth (Figures 2 and 4, see link below).
Drill holes NMDD374-721 and NMDD372-741 were cored from surface. The soft near surface materials were drilled with a Triple Tube core barrel to reduce core losses. Once harder rock was encountered, then HW steel casing was inserted for stability of each hole and HQ size core was drilled to their final depths of 411.90m and 312.30m respectively.
The drill rigs were aligned for both drill holes at -65DEG dip drilling east which allows for the shallowing of the drill holes with depth. The azimuth was set at 095DEG instead of 100DEG (normal to the strike of the formations) as the borehole traces usually deflects to the right with depth due to the clockwise rotation of the drill rods.
The drill holes were surveyed near the top of each drill hole, then every 30m down the hole to determine the dip and azimuth of the drill holes with depth.
The core was orientated at each drill run using a digital instrument. The core was marked showing the base of the drill hole, then the core from each drill run was laid in a length of angle iron to fit the core together so that the orientation line could be drawn along the length of the core at the drill site. Geotechnical parameters were measured using this orientation line as the datum line.
The core was photographed then cut in half and then cut in half again. One quarter of the core was consistently sampled, with the remaining three quarters stored in metal core trays and placed on metal racks under cover in the core shed at Bolgatanga. The quarter core samples were sent to the SGS Laboratory in Burkina Faso for sample preparation and fire assay.
Planned Diamond Drilling Program
A further two infill diamond drill holes along Section R at 50m spacing from Section Q will complete the initial 50m spaced infill diamond drilling programme designed to evaluate the NNE trending gold mineralised corridor (marked in black circles on Figure 1). All of the completed infill diamond drill holes were orientated to drill across this mineralised corridor to confirm the continuation of gold mineralisation along strike and at depth.
Namdini Geology
The Namdini Project is located within a Paleo-Proterozoic Greenstone Belt comprising Birimian metavolcanics, volcaniclastics and metasediments located in close proximity to a major 30 km ~N-S regional shear zone with splays. These rock units are intruded by felsic monzonite granitoids and quartz diorites.
The gold mineralisation is developed within foliated, sheared and highly altered volcaniclastic rocks containing sulphides (pyrite and arsenopyrite). The host rocks dip approximately 60DEG W and strike 010DEG .
Hydrothermal alteration of the volcaniclastics is comprised of silica, iron carbonate (ankerite), sericite, epidote and chlorite. The highly altered rocks contain disseminated gold-bearing sulphides and are distinguished from the grey, unaltered, unmineralised host rocks by characteristic pale to medium green colours.
The monzonite granitoids are medium to coarse grained with quartz vein stockworks and are usually altered to pale green epidote with patches of pink to reddish albite (alkali feldspar). Sulphides of pyrite and arsenopyrite are contained within these granitoids.
The monzonite granitoid intrusive is considered to have been the "heat engine" which remobilised gold bearing sulphide rich fluids which altered the host rocks and precipitated the gold mineralisation within them.
The NNE-SSW trending corridor containing the gold mineralisation is bounded on both east and west sides by foliated metasediments of varying compositions, also dipping 60DEG W and striking 010DEG .
The quartz diorites contain primary pyrite sulphides which are weakly mineralised when unaltered. However, the diorites become partly mineralised when they are hydrothermally altered or sheared with quartz veining, or when some mineralised zones of altered volcaniclastics or granitoids occur within them.
Monitoring Of Drilling Programs
Cardinal's technical and management team evaluates all of the available data on a daily basis with the main focus being the expansion of the gold potential.
Cardinal, together with the two contract drill rigs, are providing the samples for express assaying services from SGS Laboratory, Ouagadougou, Burkina Faso. This enables the Company to continuously improve its drill plan strategy as new information becomes available.
To view tables and figures, please visit:
http://abnnewswire.net/lnk/7SE42899
About Cardinal Resources Ltd
Cardinal Resources Ltd (ASX:CDV) (TSE:CDV) (OTCMKTS:CRDNF) is a West African gold exploration and development Company that holds interests in tenements within Ghana, West Africa.
The Company is focused on the development of the Namdini Project with a gold Ore Reserve of 5.1Moz (0.4 Moz Proved and 4.7 Moz Probable) and a soon to be completed Feasibility Study.
Exploration programmes are also underway at the Company's Bolgatanga (Northern Ghana) and Subranum (Southern Ghana) Projects.
Cardinal confirms that it is not aware of any new information or data that materially affects the information included in its announcement of the Ore Reserve of 3 April 2019. All material assumptions and technical parameters underpinning this estimate continue to apply and have not materially changed.
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