Avala Resources Ltd. (TSX VENTURE:AVZ) has presented an update on drill results from the Korkan-Bigar target area, part of the sediment-hosted gold belt within the Cretaceous magmatic arc bordering the Timok Magmatic Complex in Eastern Serbia.
GEOLOGY AND MINERALIZATION STYLE
DRILLING AT KORKAN
SAMPLING AND ANALYSIS
The majority of soil samples have been assayed at the ALS Chemex laboratory, Perth, Australia. More recent programs have been assayed at the SGS managed laboratory at Chelopech in Bulgaria using a combination of ICP-OES and ICP-MS whereas gold has been assayed by low level detection fire assay method with an AAS finish. Trench samples were prepared at the SGS managed laboratory facility at Bor, Eastern Serbia and the samples have been assayed at the SGS managed laboratory at Chelopech in Bulgaria or the SGS managed laboratory facility at Bor, Eastern Serbia. Diamond drill core has been prepared at the SGS managed laboratory facility at Bor, Eastern Serbia and assayed at either the SGS managed laboratory at Chelopech in Bulgaria or the SGS managed assay laboratory at Bor, Eastern Serbia. A one metre sampling interval has been used where possible for the Sediment-Hosted Gold Belt diamond drilling program. Following Avala standard quality assurance procedures, a full suite of field and laboratory duplicates and replicates along with internationally accredited standards have been submitted with each batch of samples.
Trench sampling was carried out as channels in the wall just above the trench floor on 2m intervals. Except where extensive soil cover is encountered, trenches were sampled in their entirety. The samples were routinely weighed prior to final bagging to maintain an even sample size and to avoid sampling bias in harder rock types. An average channel sample weight was maintained at 3kg/m, which produces a consistent sample weight approximating half HQ core samples. Field duplicate samples were taken every 20 samples and known standards were inserted into the sample stream after every 20th sample. A geological and structural log was completed as for diamond drilling. All data collected in the field was routinely entered into geology and structural geology spread sheets using Field Marshal software for subsequent entry to an acQuire database and validation.
Dr Julian F. H. Barnes, a qualified person under National Instrument 43-101, a Director and the Company's Special Consultant, has supervised the preparation of the technical data in this press release.
Source: Avala Resources Ltd.
- Wide-spaced 'step out' drilling on the Korkan-Bigar target area continues to intersect gold mineralization within the target stratigraphy, a sequence of intensely altered and decarbonatized conglomerates and sandstones with interbedded fine grained sandstone and clay-rich siltstones.
- Drilling of the Korkan-Bigar target area returned the following wide, near surface, gold intercepts (0.4g/t cut-off grade):
- KODD009 (located 80 meters east from discovery drill hole KODD001):
- 21m @ 1.68g/t (from 34m)
- Including: 18m @ 1.88g/t (from 34m)
- 24m @ 1.56g/t (from 63m)
- Including: 22m @ 1.65g/t (from 63m)
- KODD016 (located 650 meters southeast from discovery drill hole KODD001):
- 16.8m @ 2.07g/t (from 20.2m)
- Including: 10m @ 3.22g/t (from 27m)
- To date Avala has outlined gold mineralization over an approximate area of 700 meters by 300 meters surrounding the original discovery hole (KODD001). Avala intends to continue the wide-spaced drilling program to test the prospective 'target stratigraphy' which covers an area of approximately 3.5 square kilometers within the Korkan-Bigar target area so as to effectively scale the size of the newly defined sediment-hosted gold system.
- Avala currently has six diamond drill rigs allocated to the Korkan-Bigar target area. One diamond drill rig has been allocated to the southern portion of the sediment-hosted gold belt on the Umka-Strnjak target area where scout drill holes are being drilled on nominal 1,000 meter centers within the target stratigraphy.
- The combined Korkan-Bigar target area is over 10 kilometres long and 2.5 kilometers wide and represents the northern portion of the sediment-hosted gold belt.
- Sediment-hosted gold, located along the western margin of the Timok Magmatic Complex, represents a previously unrecognized style of gold mineralization within the Timok region.
- The Korkan-Bigar target area is underlain by massive Jurassic limestone, unconformably overlain by a polymict conglomerate and sandstone sequence with a carbonate matrix component which is the host to the strongly mineralized interval intersected by the initial drill hole KODD001 which returned 52 meters at 4.30g/t gold (previously reported in a news release dated Nov. 10, 2010).
- Drilling has defined an interbedded fine grained sandstone and clay-rich siltstone unit which Avala believes represents an aquitard unit within the larger sedimentary package that defines the 'target stratigraphy'. This unit effectively outcrops in the Korkan-Bigar target area and is responsible for the lack of a gold geochemical response from soil sampling over the target area. The aquitard unit has also been outlined within the overall sedimentary package where it is generally not mineralized.
- The 'target stratigraphy' is overlain by an unmineralized marl unit which in turn appears to be conformably overlain by andesitic volcanics and volcaniclastics. Avala believes that these overlying volcano-sedimentary units represent a barren 'cover' or 'capping' sequence. The polymict conglomerate and sandstone unit together with the aquitard unit, constitute the 'target stratigraphy'; which hosts the gold mineralization intersected to date and appears to have been very gently folded under the cover sequence and 'daylights' again at the northern part of the Bigar target area.
- The Korkan-Bigar target area represents possible stratabound and fault-controlled sediment-hosted gold mineralization within a favourable sedimentary unit; the polymict conglomerate and sandstone.
- Avala continues the 'step out' drilling at the Korkan-Bigar target area, on a nominal 160 meter by 160 meter spacing. The results of diamond drill holes KODD008 to KODD018 are discussed in this release.
- Strong gold mineralization is hosted within polymict conglomerate and sandstone intervals which have been strongly decarbonatized with intense, sooty, fine grained pyrite matrix infill. The target stratigraphy unconformably overlies massive Jurassic limestone. To date gold mineralization within the footwall massive limestone has been of an overall low tenor and is generally associated with brittle deformation i.e. brecciation.
- A major sediment-hosted gold belt bordering the western boundary of the Timok Magmatic Complex, identified by soil and trench samples, extends over 20 kilometers along strike and is up to 8 kilometers wide.
- The geology, geochemistry and available drill intersections suggest a strong similarity to the style of gold mineralization typified by the North Carlin Trend, Nevada, USA.
- At Korkan, initial diamond drilling and at Bigar, trenching, have outlined significant gold mineralization over a north-south length in excess of 4 kilometers, associated with polymict conglomerate and sandstone which have been variably decarbonatized and mineralized with sooty, fine grained pyrite which contains significant gold values.
- The recognition that the majority of the significant trench and diamond drill intercepts returned to date occur within the same flat lying or shallow dipping lithological and stratigraphic unit has significant implications for the gold potential of the Korkan-Bigar target area and the entire sediment-hosted gold belt.
- Drill testing of the Korkan-Bigar sediment-hosted gold target area will continue with wide spaced (nominal 160 meter by 160 meter) diamond drill holes to allow Avala to effectively scale the potential size of the sediment-hosted gold system which appears to cover an area of approximately 3.5 square kilometers.
- In addition, the Jurassic limestone package has strongly anomalous gold in soil geochemistry where it is exposed in the Korkan-Bigar target area and numerous gold mineralized trench intercepts have been returned to date, hosted in limestone, which require drill follow-up in due course.
- Avala controls 100% of the newly identified sediment hosted gold belt which totals approximately 250 square kilometers and intends to systematically drill test all currently defined priority target areas.