Mumbwa Project: Kitumba Infill Drilling Assay Results
SYDNEY, AUSTRALIA--(Marketwired - Dec. 15, 2014) - Intrepid Mines Limited (IAU.AX)
KEY POINTS
Assay results received for 11 holes from the Phase 8 drilling program
Highlights include:
KITDD_055: 339m @ 2.47% Cu from 197 - 536m, including:
17m @ 9.22% Cu from 333 - 350m
KITDD_045: 181m @ 2.8% Cu from 230 - 411m, including
10m @ 10.37% Cu from 251 - 261m
19m @ 6.07% Cu from 350 - 369m
KITDD_046: 214m @ 1.76% Cu from 233 - 447m, including:
15m @ 6.32% Cu from 264 - 279m
KITDD_042A: 82m @ 2.29% Cu from 342 - 424m.
2014 soil geochemical sampling complete
Two IP surveys complete with a third underway to be finished before the end of the year
Phase 8 drilling for metallurgical samples, resource definition, and geotechnical and hydrological analysis is now complete with the camp to move to care and maintenance during the wet season
A full interpretation of new geochemical and geophysical data to be integrated and ranked against existing targets during the wet season
Intrepid Mines Limited (IAU.AX) ("Intrepid", or the "Company") has received assay results for the following drill holes from the Phase 8 drilling program:
KITDD_042A
KITDD_043
KITDD_044
KITDD_045
KITDD_046
KITDD_047
KITDD_048
KITDD_049
KITDD_050
KITDD_051
KITDD_055
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: http://media3.marketwire.com/docs/983956Fig1.jpg.
Table 1. Completed Phase 8 drill holes
ID | Easting | Northing | Elevation | Azimuth | Dip | EOH (m) |
KAKDD_004 | 474960 | 8375409 | 1,267 | 90 | -70 | 548 |
KAKDD_005 | 476000 | 8375000 | 1,278 | 90 | -60 | 550 |
KAKDD_006 | 476247 | 8374300 | 1,272 | 90 | -57 | 341 |
KITDD_041A | 479091 | 8373991 | 1,405 | 90 | -75 | 599 |
KITDD_042A | 479092 | 8373797 | 1,417 | 90 | -70 | 539 |
KITDD_043 | 479044 | 8373908 | 1,409 | 90 | -78 | 468 |
KITDD_044 | 479160 | 8373797 | 1,431 | 90 | -70 | 459 |
KITDD_045 | 479189 | 8373921 | 1,408 | 90 | -75 | 543 |
KITDD_046 | 479160 | 8373950 | 1,409 | 90 | -70 | 455 |
KITDD_047 | 479212 | 8374067 | 1,420 | 90 | -66 | 358 |
KITDD_048 | 479200 | 8373742 | 1,447 | 0 | -90 | 542 |
KITDD_049 | 479217 | 8374017 | 1,427 | 90 | -70 | 500 |
KITDD_050 | 479087 | 8373702 | 1,424 | 90 | -70 | 468 |
KITDD_051 | 479215 | 8374098 | 1,424 | 85 | -70 | 423 |
KITDD_052 | 479140 | 8374113 | 1,415 | 90 | -70 | 444 |
KITDD_053 | 479172 | 8374024 | 1,415 | 0 | -90 | 497 |
KITDD_054 | 479127 | 8374068 | 1,410 | 90 | -70 | 551 |
KITDD_055 | 479256 | 8373862 | 1,450 | 0 | -90 | 603 |
KITDD_056 | 478777 | 8373870 | 1,386 | 0 | -90 | 196 |
KITDD_057 | 478777 | 8373921 | 1,384 | 0 | -90 | 196 |
KITDD_058 | 478777 | 8374034 | 1,396 | 0 | -90 | 329 |
KITDD_059 | 478777 | 8374284 | 1,389 | 0 | -90 | 214 |
KITDD_060 | 478905 | 8374127 | 1,408 | 115 | -70 | 522 |
KITDD_061 | 478572 | 8373954 | 1,380 | 239 | -70 | 141 |
KITDD_062 | 478902 | 8373946 | 1,393 | 115 | -70 | 500 |
KITDD_063 | 478363 | 8373829 | 1,359 | 0 | -90 | 85 |
KITDD_064 | 478167 | 8373714 | 1,373 | 59 | -70 | 71 |
KITDD_065 | 478090 | 8373664 | 1,378 | 239 | -70 | 61 |
KITDD_066 | 477998 | 8373604 | 1,379 | 239 | -70 | 46 |
KITDD_067 | 479275 | 8374000 | 1,439 | 88 | -65 | 402 |
KITDD_068 | 478690 | 8374000 | 1,387 | 87 | -55 | 539 |
KITDD_069 | 478800 | 8373910 | 1,390 | 90 | -70 | 249 |
KITDD_070 | 479300 | 8373900 | 1,433 | 88 | -65 | 414 |
12,849 |
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: http://media3.marketwire.com/docs/983956Fig2.jpg.
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 @ 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)
From | To | Interval | Cu % |
60 | 94 | 34 | 0.44 |
98 | 104 | 6 | 0.34 |
110 | 112 | 2 | 0.27 |
116 | 118 | 2 | 0.26 |
124 | 126 | 2 | 0.29 |
132 | 138 | 6 | 0.48 |
148 | 173 | 25 | 0.40 |
176 | 189 | 13 | 0.33 |
200 | 202 | 2 | 1.40 |
207 | 211 | 4 | 0.40 |
221 | 224 | 3 | 0.87 |
240 | 248 | 8 | 0.66 |
258 | 267 | 9 | 1.10 |
275 | 296 | 21 | 0.67 |
302 | 307 | 5 | 0.82 |
310 | 338 | 28 | 0.56 |
342 | 424 | 82 | 2.29 |
426 | 437 | 11 | 0.37 |
453 | 469 | 16 | 0.50 |
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 @ 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)
From | To | Interval | Cu % |
189 | 193 | 4 | 0.34 |
195 | 203 | 8 | 0.41 |
203 | 346 | 143 | 0.85 |
350 | 352 | 2 | 0.25 |
380 | 403 | 23 | 0.60 |
416 | 418 | 2 | 0.34 |
421 | 444 | 23 | 0.49 |
464 | 466 | 2 | 0.39 |
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 @ 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)
From | To | Interval | Cu % |
146 | 158 | 12 | 0.76 |
162 | 179 | 17 | 1.90 |
183 | 185 | 2 | 2.67 |
192 | 200 | 8 | 0.99 |
214 | 232 | 18 | 1.06 |
241 | 248 | 7 | 1.41 |
253 | 313 | 60 | 1.17 |
316 | 328 | 12 | 1.34 |
334 | 400 | 66 | 0.63 |
406 | 408 | 2 | 0.38 |
412 | 418 | 6 | 0.33 |
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 @ 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)
From | To | Interval | Cu % |
98 | 144 | 46 | 0.41 |
181 | 223 | 42 | 0.82 |
230 | 411 | 181 | 2.80 |
Including | |||
251 | 261 | 10 | 10.37 |
350 | 369 | 19 | 6.07 |
420 | 454 | 34 | 1.29 |
457 | 469 | 12 | 0.46 |
474 | 480 | 6 | 0.37 |
486 | 515 | 29 | 2.93 |
526 | 538 | 12 | 0.30 |
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 @ 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)
From | To | Interval | Cu % |
103 | 180 | 77 | 1.15 |
Including | |||
117 | 128 | 11 | 3.90 |
185 | 188 | 3 | 0.33 |
192 | 203 | 11 | 0.31 |
206 | 231 | 25 | 0.41 |
233 | 447 | 214 | 1.76 |
Including | |||
264 | 279 | 15 | 6.32 |
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)
From | To | Interval | Cu % |
128 | 130 | 2 | 0.57 |
134 | 138 | 4 | 0.31 |
144 | 148 | 4 | 0.40 |
178 | 180 | 2 | 0.36 |
335 | 338 | 3 | 1.89 |
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 @ 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)
From | To | Interval | Cu % |
70 | 72 | 2 | 0.43 |
76 | 78 | 2 | 0.29 |
84 | 112 | 28 | 0.33 |
118 | 140 | 22 | 1.33 |
154 | 161 | 7 | 0.38 |
181 | 187 | 6 | 0.29 |
198 | 221 | 23 | 0.70 |
227 | 229 | 2 | 0.32 |
232 | 241 | 9 | 1.37 |
255 | 263 | 8 | 0.75 |
270 | 273 | 3 | 0.86 |
276 | 281 | 5 | 0.75 |
286 | 293 | 7 | 0.50 |
298 | 300 | 2 | 1.08 |
323 | 330 | 7 | 0.70 |
336 | 382 | 46 | 1.61 |
394 | 411 | 17 | 1.08 |
417 | 431 | 14 | 1.83 |
438 | 442 | 4 | 0.99 |
445 | 454 | 9 | 0.86 |
457 | 529 | 72 | 0.58 |
538 | 542.44 | 4.44 | 0.39 |
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 @ 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)
From | To | Interval | Cu % |
78 | 84 | 6 | 0.25 |
90 | 92 | 2 | 0.34 |
104 | 108 | 4 | 0.37 |
118 | 158 | 40 | 0.34 |
170 | 174 | 4 | 0.28 |
263 | 345 | 82 | 1.37 |
349 | 354 | 5 | 0.46 |
364 | 380 | 16 | 0.47 |
384 | 386 | 2 | 0.49 |
451 | 458 | 7 | 1.08 |
464 | 480 | 16 | 0.92 |
493 | 495 | 2 | 0.47 |
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)
From | To | Interval | Cu % |
60 | 68 | 8 | 0.28 |
72 | 74 | 2 | 0.37 |
180 | 182 | 2 | 0.36 |
220 | 225 | 5 | 0.32 |
230 | 235 | 5 | 0.91 |
272 | 274 | 2 | 0.58 |
307 | 311 | 4 | 0.55 |
314 | 318 | 4 | 0.30 |
321 | 333 | 12 | 0.53 |
341 | 344 | 3 | 0.50 |
349 | 353 | 4 | 0.87 |
359 | 366 | 7 | 0.58 |
386 | 392 | 6 | 0.75 |
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)
From | To | Interval | Cu % |
76 | 102 | 26 | 0.45 |
156 | 158 | 2 | 0.28 |
162 | 164 | 2 | 0.33 |
170 | 212 | 42 | 0.42 |
258 | 262 | 4 | 0.31 |
312 | 318 | 6 | 0.80 |
360 | 398 | 38 | 1.01 |
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 @ 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)
From | To | Interval | Cu % |
48 | 90 | 42 | 0.45 |
96 | 102 | 6 | 0.31 |
112 | 150 | 38 | 0.45 |
156 | 184 | 28 | 1.19 |
197 | 536 | 339 | 2.47 |
Including | |||
333 | 350 | 17 | 9.22 |
560 | 566 | 6 | 0.58 |
572 | 578 | 6 | 0.29 |
584 | 594 | 10 | 0.50 |
598 | 600 | 2 | 0.32 |
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 >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.
ATTRIBUTION | The information in this report which relates to exploration results at the Mumbwa Project in Zambia is based on information compiled by Mr Michael J Robertson, MSc, Pr.Sci.Nat., MSAIMM who is a member of the South African Institute of Mining and Metallurgy, which is a Recognised Professional Organisation ('RPO'). Mr Robertson has more than 22 years' experience in mineral exploration and is a full-time employee of the MSA Group. Mr Robertson has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which is being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the 'Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves' and a Qualified Person as defined in the Canadian National Instrument 43-101 (Standards of Disclosure for Mineral Projects). Mr Robertson has consented to the inclusion in this report of the matters based on his information in the form and context in which it appears. |
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.)
Criteria | JORC Code explanation | Commentary | ||
Sampling techniques | - Nature and quality of sampling (eg, cut channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc). These examples should not be taken as limiting the broad meaning of sampling. | - All holes were diamond drilled. A total of 33 drill holes were drilled in phase 8 for a total of 12,849 m. 11 are presented here. Holes were drilled at various inclinations from vertical through to 55 degrees, predominantly angled towards 090 at between 60 and 115 degrees. Select geotechnical drill holes were drilled at 239 degrees. | ||
Drilling techniques | - Drill type (eg, core, reverse circulation, open-hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (eg core diameter, triple or standard tube, depth of diamond tails, face-sampling bit or other type, whether core is oriented and if so, by what method, etc). | - Diamond core only, HQ predominant with PQ pre-collars. Core was oriented using a Reflex ACT II. | ||
Drill sample recovery | - Method of recording and assessing core and chip sample recoveries and results assessed. | - Core recoveries are logged, core recoveries for phases 1-7 were 96%. | ||
Logging | - Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies. | - All core has been logged for geological (lithology, mineralisation, alteration) and geotechnical (alpha/beta angles, RQD, defect count) information, all data is stored in a database. | ||
Sub-sampling techniques and sample preparation | - If core, whether cut or sawn and whether quarter, half or all core taken. | - All core is cut with purpose built core saws onsite, with half core (HQ and NQ size) collected for sampling, ensuring the same side of the core is consistently sampled. In the case of PQ size core, quarter core was cut and sampled. Field duplicates were submitted to monitor QC of sample preparation and laboratory assay precision. | ||
Quality of assay data and laboratory tests | - The nature, quality and appropriateness of the assaying and laboratory procedures used and whether the technique is considered partial or total. | - Samples were submitted to a four acid digest (sulphuric, nitric, perchloric and hydrofluoric) and cold acid leach. | ||
Verification of sampling and assaying | - The verification of significant intersections by either independent or alternative company personnel. | - Significant intersections are reported by The MSA Group which is an independent contractor providing geological services to the company. | ||
Location of data points | - Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation. | - Hole collars have been surveyed by differential GPS, down hole surveys were collected every 6m (inclined holes) and 12m (vertical holes) using Reflex and Gyro instruments during different phases of the project. Appropriate QC procedures were applied to verify down hole surveys. | ||
Data spacing and distribution | - Data spacing for reporting of Exploration Results. | - The nominal drill hole spacing varied between 20m and 40m in the high grade portion to between approximately 80m and 200m outside of this extending out to 200m x 200m on the margins. | ||
Orientation of data in relation to geological structure | - Whether the orientation of sampling achieves unbiased sampling of possible structures and the extent to which this is known, considering the deposit type. | - Holes are predominantly drilled towards 090 at a 60-80 degrees dip to intersect sub vertical N-S oriented mineralisation. Holes have been drilled towards 180 and 270 confirming the sub-vertical nature of the deposit. | ||
Sample security | - The measures taken to ensure sample security. | - An unbroken sample chain of custody was implemented, as follows: | ||
Audits or reviews | - The results of any audits or reviews of sampling techniques and data. | - Audits of the sample preparation laboratories at AH Knight in Kitwe and Intertek Genalysis in Chingola and an audit of the Intertek Genalysis laboratory in Johannesburg were conducted by the CP. |
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
Criteria | JORC Code explanation | Commentary | ||
Mineral tenement and land tenure status | - Type, reference name/number, location and ownership including agreements or material issues with third parties such as joint ventures, partnerships, overriding royalties, native title interests, historical sites, wilderness or national park and environmental settings. | - Kitumba is located entirely within the 100% owned Kitumba Mining licence 19820-HQ-LML. | ||
Exploration done by other parties | - Acknowledgment and appraisal of exploration by other parties. | - The Mumbwa Project operated under joint venture with BHP Billiton from 2008-2011. | ||
Geology | - Deposit type, geological setting and style of mineralisation. | - The Kitumba deposit is recognised as having IOCG type characteristics; it is hosted in a hematite breccia complex within intrusives of the Hook Granitoid suite (Early Cambrian to Neoproterozoic). Mineralisation is supergene in nature (chalcocite, malachite, chalcosiderite, native copper) to 400+m, hypogene mineralisation consists primarily of chalcopyrite and pyrite. | ||
Drill hole Information | - A summary of all information material to the understanding of the exploration results including a tabulation of the following information for all Material drill holes: | - See Table 1. | ||
Data aggregation methods | - In reporting Exploration Results, weighting averaging techniques, maximum and/or minimum grade truncations (eg, cutting of high grades) and cut-off grades are usually Material and should be stated. | - Length-weighted average grades reported. No upper limit has been applied to copper grades in these exploration results. | ||
Relationship between mineralisation widths and intercept lengths | - These relationships are particularly important in the reporting of Exploration Results. | - True-widths are not quoted, as the mineralised zone is associated with a sub-vertical north-south oriented zone of brecciation. | ||
Diagrams | - Appropriate maps and sections (with scales) and tabulations of intercepts should be included for any significant discovery being reported These should include, but not be limited to a plan view of drill hole collar locations and appropriate sectional views. | - A plan map (Figure 1), is contained within this announcement. | ||
Balanced reporting | - Where comprehensive reporting of all Exploration Results is not practicable, representative reporting of both low and high grades and/or widths should be practiced to avoid misleading reporting of Exploration Results. | - All results are reported. | ||
Other substantive exploration data | - Other exploration data, if meaningful and material, should be reported including (but not limited to): geological observations; geophysical survey results; geochemical survey results; bulk samples - size and method of treatment; metallurgical test results; bulk density, groundwater, geotechnical and rock characteristics; potential deleterious or contaminating substances. | - There is no outstanding exploration data considered material that has not been previously reported or is not contained within this report. | ||
Further work | - The nature and scale of planned further work (eg, tests for lateral extensions or depth extensions or large-scale step-out drilling). | - Future drilling at Kitumba will focus on sample collection for metallurgy, sterilisation and geotechnical drilling to satisfy requirements for a "DFS" and project development. Exploration work will concentrate on satellite prospects surrounding Kitumba within the Mumbwa Project area. |