Mumbwa Project: Kitumba Infill Drilling Assay Results
(firmenpresse) - SYDNEY, AUSTRALIA -- (Marketwired) -- 12/15/14 -- Intrepid Mines Limited (ASX: IAU)
KEY POINTS
Intrepid Mines Limited (ASX: IAU) ("Intrepid", or the "Company") has received assay results for the following drill holes from the Phase 8 drilling program:
The location of these drill holes is shown in Figure 1 below.
CEO, Mr Mark Mitchell said:
"We are pleased to report on the first batch of assay results from our recently completed Phase 8 drilling program on our Kitumba Project. The Phase 8 drilling campaign was completed on schedule and within budget and has provided the necessary samples for key datasets to be used in the DFS. This includes approximately 4 tonnes of material to be used for metallurgical studies.
We are also pleased to advise that in parallel to work on Kitumba we have been advancing targets on our wider Mumbwa Project and are encouraged about results from our recent geophysical and soil geochemical surveys. The results of which will be assessed in detail over the current wet season to identify targets for our 2015 drilling season."
Phase 8 Drilling Program Update
Drilling restarted at Kitumba in June 2014 and was completed in November 2014. A total of 33 diamond holes were completed for a total of 12,849 meters. The drill pattern was designed to focus on the collection of material for metallurgical analysis including; a series of variability samples representative of ore-feed (and gangue) from a conceptual mining schedule, comminution samples and feed for a pilot plant.
Figure 1 - Phase 8 drill hole location plan, showing collar locations and planned development as presented in the Optimised PFS. Drillholes presented here are shown with green circles: .
Table 1. Completed Phase 8 drill holes
Metallurgical holes were also designed to fill gaps in the existing resource and to inform an updated Mineral Resource Estimate. It is expected the Company will be in a position to report this to the market in Q2 2015.
Select metallurgical/infill holes were also used for geotechnical and hydrological purposes.
Drilling that was specifically designed for geotechnical purposes only (no mineralisation expected), was also completed. These holes were drilled into areas of planned development (box cut, decline, air shafts). Geotechnical holes have been probed with an Acoustic Televiewer (ATV) for the collection of detailed-high resolution structural and engineering data. Geotechnical samples for laboratory analysis have been collected and planned testwork includes; unconfined compressive strength, direct shear, triaxial, cherchar abrasivity index, slake durability and petrographic analysis.
Additional drilling outside the Kitumba resource has included sterilisation drilling on areas slated for planned infrastructure (KAKDD_04, 05 and 06 on Table 1) and percussion (PCD) and reverse circulation (RC) drilling of groundwater monitoring bores.
Other Mumbwa Project Area Activities
Targets generated during 2014 are shown against the exploration licences in Figure 2.
Limited RC drilling on Induced Polarisation (IP) targets at Target F and Target H was completed prior to the onset of the wet season, results on these are pending. Further drilling on a range of targets including Kakozhi will be conducted during the next field season.
The Company plans to use the break in field operations to conduct a full target review and ranking exercise incorporating all new data including IP surveys at Kakozhi, Target H and Kantonga (currently underway) as well as over 2,500 soil geochemical samples collected over all five Mumbwa Project tenements.
Figure 2 - 2014 soil geochemistry and IP survey locations: .
KITDD_042A - Assay Results
KITDD_042A was drilled on an azimuth of 090, inclined 70 degrees to a depth of 539 meters. This hole was drilled to collect metallurgical samples as well as for resource definition. Intercepts of note include 82 m (at) 2.29% Cu from 342 - 424 meters.
A series of 459 samples, including quality control samples, were submitted to the laboratory for analysis.
Final results having passed QA/QC are summarised here.
Table 2. Summary of assay results for drill hole KITDD_042A (azi 090, dip 70 EOH 539 m)
KITDD_043 - Assay Results
KITDD_043 was drilled on an azimuth of 090, inclined 78 degrees to a depth of 468 meters. This hole was drilled to collect metallurgical samples as well as for resource definition. Intercepts of note include 143 m (at) 0.85% Cu from 203-346 meters.
A series of 304 samples, including quality control samples, were submitted to the laboratory for analysis.
Final results having passed QA/QC are summarised here.
Table 3. Summary of assay results for drill hole KITDD_043 (azi 090, dip 78 EOH 468 m)
KITDD_044 - Assay Results
KITDD_044 was drilled on an azimuth of 090, inclined 70 degrees to a depth of 459 meters. This hole was drilled to collect metallurgical samples as well as for resource definition. Intercepts of note include 60 m (at) 1.17% Cu from 253 - 313 meters.
A series of 283 samples, including quality control samples, were submitted to the laboratory for analysis.
Final results having passed QA/QC are summarised here.
Table 4. Summary of assay results for drill hole KITDD_044 (azi 090, dip 70 EOH 459 m)
KITDD_045 - Assay Results
KITDD_045 was drilled on an azimuth of 090, inclined 75 degrees to a depth of 543 meters. This hole was drilled to collect metallurgical samples as well as for resource definition.
Intercepts of note include 181 m (at) 2.8% Cu from 230 - 411 meters.
A series of 449 samples, including quality control samples, were submitted to the laboratory for analysis.
Final results having passed QA/QC are summarised here.
Table 5. Summary of assay results for drill hole KITDD_045 (azi 090, dip 75 EOH 543 m)
KITDD_046 - Assay Results
KITDD_046 was drilled on an azimuth of 090, inclined 70 degrees to a depth of 455 meters. This hole was drilled to collect metallurgical samples as well as for resource definition. Intercepts of note include 214 m (at) 1.76% Cu from 233 - 447 meters.
A series of 412 samples, including quality control samples, were submitted to the laboratory for analysis.
Final results having passed QA/QC are summarised here.
Table 6. Summary of assay results for drill hole KITDD_046 (azi 090, dip 70 EOH 455 m)
KITDD_047 - Assay Results
KITDD_047 was drilled on an azimuth of 090, inclined 66 degrees to a depth of 358 meters. This hole was drilled on the extremities of the resource for any potential resource extension as well as to collect metallurgical samples.
A series of 149 samples, including quality control samples, were submitted to the laboratory for analysis.
Final results having passed QA/QC are summarised here.
Table 7. Summary of assay results for drill hole KITDD_047 (azi 090, dip 66 EOH 358 m)
KITDD_048 - Assay Results
KITDD_048 was drilled vertically to a depth of 542 meters. This hole was drilled to collect metallurgical samples as well as for resource definition. Intercepts of note include 42 m (at) 1.73% Cu from 340 - 382 meters.
A series of 502 samples, including quality control samples, were submitted to the laboratory for analysis.
Final results having passed QA/QC are summarised here.
Table 8. Summary of assay results for drill hole KITDD_048 (vertical, EOH 542 m)
KITDD_049 - Assay Results
KITDD_049 was drilled on an azimuth of 090, inclined 70 degrees to a depth of 500 meters. This hole was drilled to collect metallurgical samples as well as for resource definition. Intercepts of note include 82 m (at) 1.37% Cu from 263 - 345 meters.
A series of 92 samples, including quality control samples, were submitted to the laboratory for analysis.
Final results having passed QA/QC are summarised here.
Table 9. Summary of assay results for drill hole KITDD_049 (azi 090, dip 70 EOH 500 m)
KITDD_050 - Assay Results
KITDD_050 was drilled on an azimuth of 090, inclined 70 degrees to a depth of 468 meters. This hole was drilled on the extremities of the resource for any potential resource extension as well as to collect metallurgical samples.
A series of 291 samples, including quality control samples, were submitted to the laboratory for analysis.
Final results having passed QA/QC are summarised here.
Table 10. Summary of assay results for drill hole KITDD_050 (azi 090, dip 70 EOH 468 m)
KITDD_051 - Assay Results
KITDD_051 was drilled on an azimuth of 085, inclined 70 degrees to a depth of 423 meters. This hole was drilled on the extremities of the resource for any potential resource extension as well as to collect metallurgical samples.
A series of 257 samples, including quality control samples, were submitted to the laboratory for analysis.
Final results having passed QA/QC are summarised here.
Table 11. Summary of assay results for drill hole KITDD_051 (azi 085, dip 70 EOH 423 m)
KITDD_055 - Assay Results
KITDD_055 was drilled vertically to a depth of 603 meters. This hole was drilled to collect metallurgical samples as well as for resource definition. Intercepts of note include 339 m (at) 2.47% Cu from 197 - 536 meters.
A series of 543 samples, including quality control samples, were submitted to the laboratory for analysis.
Final results having passed QA/QC are summarised here.
Table 12. Summary of assay results for drill hole KITDD_055 (vertical, EOH 603 m)
Notes:
Sampling and assaying of the drill core collected follows a standard site protocol with samples of half core being submitted to the Intertek Genalysis Laboratory preparation facility in Chingola, Zambia before being shipped to the Intertek Genalysis Laboratory in Perth, Australia for analysis (4-acid digest with an ICP finish).
A cut-off grade of 0.25% Cu, a maximum internal dilution of 2m (drilled thickness) and a drilled thickness of greater than 1m are used as a guideline when delineating the drilled thickness intervals of mineralisation, with length-weighted average grades reported. True-widths are not quoted, as the mineralised zone is associated with a sub-vertical "pipe" shaped zone of brecciation. No upper limit has been applied to copper grades in these exploration results.
A total of 8 elements were analysed. Multi-element analyses (including copper) were performed using Inductively Coupled Plasma - Mass Spectrometry (ICP-MS) and Inductively Coupled Plasma - Optical Emission Spectroscopy (ICP-OES) analyses by the fully NATA accredited Intertek Genalysis Laboratory in Perth, Australia. Samples were analysed for total copper and Ca, Fe, K, Mn and S by 4-acid digest with an ICP-OES finish, U by 4-acid digest with an ICP-MS finish, and acid-soluble copper (ASCu) by cold acid leach with an AAS finish.
A Quality Assurance/Quality Control (QA/QC) program includes chain of custody protocol, a systematic submittal of 20% QA/QC samples including field duplicates, field blanks and certified reference samples into the flow of samples submitted to the laboratory and submission of samples for umpire analysis by a second accredited laboratory.
Forward-looking statement.
This announcement contains certain forward-looking statements, relating to, but not limited to Intrepid's expectations, intentions, plans and beliefs. Forward-looking information can often be identified by forward-looking words such as 'anticipate', 'believe', 'expect', 'goal', 'plan', 'intend', 'estimate', 'may' and 'will' or similar words suggesting future outcomes, or other expectations, beliefs, plans, objectives, assumptions, intentions or statements about future outcomes, or statements about future events or performance. Forward-looking information may include reserve and resource estimates, estimates of future production, unit costs, costs of capital projects, and timing of commencement of operations and is based on current expectations that involve a number of business risks and uncertainties. Factors that could cause actual results to differ materially from any forward-looking statement include, but are not limited to, failure to establish estimated resources and reserves, the grade and recovery of ore which is mined varying from estimates, capital and operating costs varying significantly from estimates, delays in obtaining or failures to obtain required governmental, environmental or other project approvals, inflation, changes in exchange rates, fluctuations in commodity prices, delays in the development of projects and other factors. Forward-looking statements are subject to a variety of known and unknown risks, uncertainties and other factors that could cause actual events or results to differ materially from those expressed or implied.
Shareholders and potential investors are cautioned not to place undue reliance on forward-looking information. By its nature, forward-looking information involves numerous assumptions, inherent risks and uncertainties, both general and specific, that contribute to the possibility that the predictions, forecasts, projections and various future events will not occur. Intrepid undertakes no obligation to update publicly or otherwise revise any forward-looking information whether as a result of new information, future events or other such factors which affect this information, except as required by law.
Appendix1: JORC Code, 2012 Edition
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
Contacts:
Intrepid Mines Limited
Mark Mitchell
Chief Executive Officer
+ 61 2 9357 9000
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Datum: 15.12.2014 - 13:00 Uhr
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