ALT RESOURCES LIMITED The Company has completed a revised Resource Estimation for the Emu, Southwark, VB and Boags areas based on revised block model and density data from all drilling programs across the Bottle Creek project area.
The current Resource upgrade at Bottle Creek further strengthens the Company's development strategy for the Mt Ida and Bottle Creek Gold Projects. Importantly, the resource upgrade provides a significant increase in the Measured and Indicated JORC categories of approximately 14%. The Company'ssuccessful growth strategy and commitment to undertake and deliver quality resource and exploration drilling results demonstrate a continued commitment to the development and expansion of the
BOTTLE CREEK RESOURCE ESTIMATION UPGRADE
The current updated Mineral Resource has been completed by Mr
The Mineral Resource Estimate contained in this report is an upgrade to the current gold and silver Resource for
LOCATION, GEOLOGY AND GEOLOGICAL INTERPRETATION
Below the base of weathering and oxidation, a massive pyrite-pyrrhotite zone up to 6m thick occurs within the sheared black shale in a variable gangue of quartz and white mica, coarse grained quartz, siliceous graphitic schist, grunerite-chlorite schist, garnet pods and ankerite-calcite-biotite-hornblende-quartz schist. Silver occurs within tetrahedrite, arsenical pyrite, pyrrhotite, sphalerite, arsenopyrite, chalcopyrite and electrum within the massive sulphides.
The geological interpretations for the Bottle Creek Emu Formation deposits being the Emu, Southwark, Cascade, VB, Boags and VB North resource estimates are based on the currently known models of ore genesis, geological history and structural deformation which has been previously described in project reporting. The geological models have been developed with continuous improvements made in data quality by the Company with the addition of new exploration and drilling. HGMC has utilised this geological data as the basis to develop updated 3D mineralisation models used for current resource estimation and reporting.
DRILLING TECHNIQUES
Industry standard drilling techniques have been used at all deposits discussed in this announcement. RC drilling techniques have been undertaken using a face sampling hammer and cone splitter. The drill rigs used was a KWL350 (RC) with on-board 1100 CFM/350 PSI air system complemented with 2400 CFM/ 850 PSI auxiliary air. The drill rigs used were set up to drill 143mm diameter holes and a KW380 utilising 114mm rods and 143mm bit (RC) using an onboard compressor and auxiliary air rated at 1000psi and 2400cfm. No diamond drill hole data has been utilised in the preparation of this Resource Upgrade. Historical drilling techniques were reported as using industry standard RC drilling rigs however information relating to the type of rigs used is unavailable. The Company, during all phases of drilling programs, has twinned multiple historical holes drilled by North and
SAMPLING AND SUBSAMPLING TECHNIQUES
Reverse Circulation (RC) drill chips were collected directly from a cone splitter on the drilling rig and automatically fed into pre-numbered calico bags. All sample utilised 1m intervals, and the sample weight averaged 2kg. The splitter and cyclone are cleaned and levelled at the beginning of every hole and cleaned at regular intervals (minimum of 2 rods or 12m) during drilling. Observations of sample size and quality are made whilst logging. A combination of certified reference materials, coarse blanks and duplicates are included in the sample stream at a rate of 9 in 100. No umpire assays have been undertaken to date. The standard practice employed is to drill dry and for reported drilling all samples recorded were classed as dry or occasionally damp. The sample is dropped on metre intervals from the cyclone through a cone splitter for sampling. The sample preparation technique is judged appropriate for the sample type and mineralisation style being tested.
The cyclone and cone splitter are regularly cleaned to prevent contamination. Field duplicates are taken and to date show excellent correlation and repeatability, suggesting the samples are representative of in situ material. Further work such as twinning historical holes has been undertaken at all deposits. The sample size is judged appropriate for the grain size of the material being sampled, and the repeatability of the field duplicates supports this. Samples were assayed by ALS Kalgoorlie where the delivered sample is pulverised to -75-microm, where a 30g sub-sample was then analysed by AAS fire assay technique. Analyses was completed for gold only with a detection limit of 0.01 ppm. Samples are collected whilst drilling and grouped in labelled poly-weave bags, which are cable tied closed then transported by Alt personnel directly to the laboratory.
Certified reference materials were inserted into the sample series at set intervals. Every 100 samples drilled includes 3 blank samples, 2 duplicate samples and 6 certified reference standards. No umpire assays have been undertaken to date. To date an acceptable level of precision and accuracy has been observed.
Contact:
Peter Nesveda
Tel: +61 (0) 412 357 375
Email: peter@intuitiveaustralia.com.au
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