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PREDICTIVE DISCOVERY LIMITED — Regulatory Filings 2021
Jul 18, 2021
65537_rns_2021-07-18_1a3aaa2a-802f-460c-b411-8f229882e740.pdf
Regulatory Filings
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ASX: PDI | 19[th] July 2021
BONANZA GOLD GRADES AS HIGH-GRADE ZONE REVEALED AT BANKAN
Predictive Discovery Limited (ASX: PDI) is pleased to announce new results from 4 Diamond Drill (DD) holes (totalling 1,033m) and ongoing regional exploration programs at its Bankan Project, located in Guinea.
HIGHLIGHTS
Drilling at NE Bankan intersected high to bonanza gold grades over broad widths with gold grade and consistency increasing with depth (Figures 1-2):
-
BNEDD0088: 49.7m @ 11.7g/t Au from 301m, including:
-
17.0m @ 31.9g/t Au from 313m (including 7.0m @ 50.3g/t Au )
-
BNEDD0087: 55.6m @ 5.7g/t Au from 237m, including:
-
40m @ 7.3g/t Au from 239m
These new results have revealed a high-grade gold core zone, outlined by nine high-grade intercepts, which is already 100-200m long, extends down-dip for over 250m and is open at depth.
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Figure 1 – Bankan Project, NE Bankan Longitudinal Projection illustrating emerging high-grade gold zone (red stipple), widening at depth.
ASX: PDI | 19[th] July 2021
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Figure 2 - NE Bankan Cross section 1175100N showing new high-grade DD holes BNEDD0087 and BNEDD0088 (red result labels).
Managing Director Paul Roberts said - “Following up our recent, previous best-ever intercept of 44m at 8g/t Au[1] with a significantly broader and higher-grade gold intercept 100m to its north is simply remarkable. Added to that, on the new drill section reported here, we can see a clear progression of both increasing grade and grade consistency as we drill deeper. Furthermore, with these new results, we now have a high-grade gold zone which is 100-200m long, extends down-dip for over 250m and, very promisingly, is open at depth.
Until now, NE Bankan has been shaping up as a large gold deposit with excellent geometry for a large-scale open pit mine. These new results have added a whole new dimension to the project as it now appears that the core of the deposit contains consistently higher grades in a zone which is expanding at depth. This offers clear justification for drilling deeper on this deposit.
Our immediate task is to define the new high-grade zone by infill and extension drilling. To this end, the multipurpose drill rig currently on site will be focused on further defining and extending this zone over the next few months.
1 ASX release 1 July 2021 - 44M @ 8G/T GOLD – HIGHEST IMPACT GOLD INTERCEPT AT BANKAN PROJECT https://www.investi.com.au/api/announcements/pdi/6d60141c-a60.pdf
ASX: PDI | 19[th] July 2021
Elsewhere, we continue to obtain broad, good-grade shallow gold intercepts at Bankan Creek and are continuing to obtain encouraging gold results in our regional auger program, adding to our inventory of regional drill targets on the Bankan Project.”
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Figure 1 - NE Bankan plan view showing West-East drilled RC/DD holes overlain on the power auger gold anomaly.
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Figure 4 - Representative high grade drill core from hole BNEDD0088 (324-326m) – intense pink feldspar alteration of tonalite with abundant pyrite (iron sulphide) veins. 1m gold grades are shown as annotations on the core.
ASX: PDI | 19[th] July 2021
BANKAN CREEK
Results from two further shallow DD holes have been received (Figure 5), with gold mineralisation intersected from 6m in DD-hole BCKDD0007, while BCKDD0009 intersected a broad width of good-grade gold from 72m (downhole). Better results included:
-
BCKDD0007: 18m @ 2.3g/t Au from 6m, and
-
26m @ 2.9g/t Au from 39m, including:
-
8m @ 6.3g/t Au from 50m
-
BCKDD0009: 58m @ 1.4g/t Au from 72m, including:
-
14m @ 2.1g/t Au from 91m, and
-
6.4m @ 4.6g/t Au from 114m
-
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Figure 5 - Bankan Creek plan view with new DD holes BCKDD0007 and BCKDD0009 overlain on previous west to east RC/DD holes and gold auger footprint.
The new Bankan Creek results are from the ongoing resource drilling program. Two DD-holes are reported, both of which intersected broad zones of good to high-grade gold from shallow depths.
ASX: PDI | 19[th] July 2021
Drilling has been carried out on 40m spaced lines with a 40-80m hole spacing along lines. The drilling planned for the Maiden Resource estimate is now complete.
Mineralisation at Bankan Creek currently extends for approximately 300m along strike and remains open to depth and to the south Figures (5-7).
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Figure 6 -- Bankan Creek Cross section showing new DD hole BCKDD0007 (red result labels).
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ASX: PDI | 19 [th] July 2021
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Figure 7 - Bankan Creek Cross section showing new DD hole BCKDD0009 (red result labels).
Details of the drilling carried out at both NE Bankan and Bankan Creek are provided in Tables 1 and 3.
ARGO/BOKORO POWER AUGER DRILLING AND SAMPLING
Power auger and sampling programs at Argo and Bokoro continue to identify evidence of widespread gold in saprolite beneath shallow lateritic cover (Figure 8). Encouraging rock chip results were also returned with multiple high-grade samples collected on both the Argo and Bokoro permits.
ASX: PDI | 19[th] July 2021
Better power auger results included:
-
BKAU0584: 20m @ 0.7g/t Au from 4m, including 4m @ 3.3g/t Au from 4m
-
BKAU0520: 20m @ 1.3g/t Au from 4m, including 4m @ 6.0g/t Au from 4m
-
BKAU0389: 24m @ 0.8g/t Au from 4m, including 4m @ 3.6g/t Au from 8m
-
BKAU0467: 15m @ 1.0g/t Au from 4m, including 4m @ 1.4g/t Au from 8m
-
BKAU0518: 21m @ 0.5g/t Au from 4m, including 4m @ 1.2g/t Au from 4m
-
BKAU0361: 21m @ 0.6g/t Au from 4m
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Figure 8 - Bankan Project, Argo and Bokoro Prospects showing new power auger and rock chip sample results.
Rock chip sampling on new target AG3 (Figure 8) has identified consistently encouraging gold values, ranging up to 14.1 g/t Au, from selective sampling of quartz-tourmaline vein material obtained from artisanal mine pits over a strike length of approximately 1km. Power auger drilling in this area has also returned encouraging results and more auger results are awaited.
Details of the power auger and rock chip sampling are provided in Tables 2 and 4.
ASX: PDI | 19[th] July 2021
The recently completed aeromagnetic survey identified nine high priority regional gold drill targets along a major 35km-long NNW structural corridor, all located within the Bankan Project. The Company is using power auger drilling to test each area, targeting shallow oxide gold mineralisation in deeply weathered bedrock. Such zones can extend down into fresh rock with thick widths and good continuity, as demonstrated at the NE Bankan and Bankan Creek prospects.
Power auger drilling is carried out with a 4WD mounted auger rig capable of drilling vertical holes up to 30m deep. The target depth on this drill program was up to 24m. Up to 6 samples are collected in 4m intervals and assayed for gold.
Next Steps
The resource drill program has now finished. In addition to the drilling reported to date, included within the maiden resource drilling program is one additional deep DD drill hole to the south of the known deep gold zone, testing the inferred southerly plunge position of the plus 100g*m gold mineralised contour (Figure 2). Assay results for this hole have not yet been received.
At present, one multipurpose RC-DD rig is on site and has already commenced drilling a deeper hole beneath hole BNEDD0086 (12m @ 6.7g/t Au – Figure 1). This rig will be employed to drill both deeper holes and infill drill holes within the inferred high-grade zone reported in this ASX release.
The Company is currently working with a Senegal-based drill contractor to bring a truck mounted air core rig on to site. This rig will be employed during the rainy season to test the accumulating number of new targets defined by power auger drilling on the Bankan Project over the past 9 months.
-END-
Predictive advises that it is not aware of any new information or data that materially affects the exploration results contained in this announcement.
This announcement is authorised for release by Predictive Managing Director, Paul Roberts.
For further information please contact:
Paul Roberts Managing Director
Tel: +61 402 857 249 Email: [email protected]
ASX: PDI | 19[th] July 2021
COMPETENT PERSONS STATEMENT
The exploration results reported herein are based on information compiled by Mr Paul Roberts (Fellow of the Australian Institute of Geoscientists). Mr Roberts is a full-time employee of the company and has sufficient experience relevant to the style of mineralisation and type of deposits being considered to qualify as a Competent Person as defined by the 2012 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves. Mr Roberts consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
ABOUT PREDICTIVE
The Company’s primary focus is the 100%-owned Bankan Project, located in Guinea’s Siguiri Basin, which hosts AngloGold’s large Siguiri Mine (+10Moz). In April 2020, the Company made a greenfields gold discovery on its Kaninko permit, now known as the Bankan Project.
Bankan comprises 4 tenements - Kaninko, Saman, Argo and Bokoro – a 358km[2 ] land package with no previous drilling undertaken. A 25,000-meter drilling program is currently underway with the aim of delivering an initial resource in the September Quarter, 2021.
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Figure 9 - Predictive Discovery’s 100%-owned Guinea Portfolio of gold projects
ASX: PDI | 19[th] July 2021
TABLE 1 – NE BANKAN & BANKAN CREEK DIAMOND DRILL RESULTS
| Hole No. | Prospect | UTM 29N East |
UTM 29N North |
RL (GPS) |
Hole azimuth |
Hole dip |
Hole depth |
0.25g/t gold cut-off | 0.25g/t gold cut-off | 0.25g/t gold cut-off | Comments |
|---|---|---|---|---|---|---|---|---|---|---|---|
| From | Interval (true width in brackets) |
Au g/t |
|||||||||
| BNEDD0087 | Bankan NE | 396470 | 1175104 | 424 | 90 | -55 | 386.1 | 237.4 | 55.6 | 5.67 | Incl. 40m @ 7.29g/t Au from 239m with |
| (55.6) | higher-grade zones of 4.8m @ 20.55g/t Au | ||||||||||
| from 250.2m & 17m @ 7.62g/t Au from | |||||||||||
| 259m | |||||||||||
| 301.0 | 5.05 (5.0) | 0.60 | |||||||||
| 320.0 | 2.02 (2.0) | 0.60 | |||||||||
| 330.0 | 13.0 (13.0) |
0.70 | |||||||||
| 346.6 | 6.4 (6.4) | 0.72 | |||||||||
| BNEDD0088 | Bankan NE | 396371 | 1175105 | 421 | 90 | -55 | 407 | 301.4 | 49.7 | 11.70 | Incl. 36.65m @ 15.75g/t Au from 301.35m |
| (49.7) | with a higher-grade zone of 17.0m @ | ||||||||||
| 31.87g/t Au from 312m, including an even | |||||||||||
| higher grade zone of 7m at 50.3g/t Au | |||||||||||
| from 322m. | |||||||||||
| 354.0 | 2.0 (1.8) | 0.60 | |||||||||
| 360.0 | 1.0 (0.9) | 2.92 | |||||||||
| 367.0 | 4.0 (3.6) | 0.40 | |||||||||
| 378.0 | 4.0 (3.6) | 2.81 | Incl. 1m @ 10.30g/t Au | ||||||||
| BCKDD0007 | Bankan Creek |
393526 | 1174054 | 373 | 60 | -55 | 90.00 | 6.0 | 18.0 | 2.33 | Incl. 4.5m of core loss (9-10.5m and 12- |
| 15m), core loss zone grade assumed to be | |||||||||||
| zero. | |||||||||||
| 41.0 | 26.0 | 2.95 | Incl. 8m @ 6.3g/t Au from 50m | ||||||||
| BCKDD0009 | Bankan Creek |
393511 | 1173998 | 374 | 60 | -55 | 150.00 | 35.0 | 2.0 | 0.77 | |
| 48.0 | 4.0 | 0.41 | |||||||||
| 63.0 | 6.0 | 0.59 | |||||||||
| 72.0 | 58.0 | 1.40 | Incl. 14m @ 2.15g/t Au from 91m & 6.4m | ||||||||
| @ 4.65g/t Au from 114.6 within a wider | |||||||||||
| interval of 18m @ 2.32g/t Au from 112m | |||||||||||
| 140.5 | 0.5 | 2.25 |
TABLE 2 – ARGO POWER AUGER DRILL RESULTS
| Hole numbers | Northing (WGS84- 29N) |
Easting (WGS84 – 29N) |
RL | Hole dips | Azimuth | Hole Depth | From | Interval | Au (ppb) |
|---|---|---|---|---|---|---|---|---|---|
| Augers |
ASX: PDI | 19[th] July 2021
| BKAU0299 – 0300, BKAU0303 - 670 & BKAU0681 - 689 372 holes totalling 7739m Significant holes with all of whole assay composites > 250ppb Au are shown below. |
Refer to Figure 7 for most sample locations |
Refer to Figure 7 for most sample locations |
378- 488 See notes |
All vertical | Not relevant to vertical holes |
The holes were 7-30m deep with an average depth of 20m. Some holes stopped short of the target depth because they encountered wet samples at shallow depths |
Not relevant to the samples described in this report |
Not relevant to the samples described in this report |
See notes and Figure 7 for colour-coded composite gold value intervals |
|---|---|---|---|---|---|---|---|---|---|
| BKAU0300 | 393820 | 1189839 | 407 | -90 | 0 | 20 | 0 | 20 | 427 |
| BKAU0321 | 393901 | 1189839 | 422 | -90 | 0 | 22 | 0 | 22 | 274 |
| BKAU0361 | 394542 | 1189280 | 411 | -90 | 0 | 21 | 0 | 21 | 643 |
| BKAU0364 | 394300 | 1189281 | 410 | -90 | 0 | 24 | 0 | 24 | 388 |
| BKAU0389 | 394142 | 1189600 | 398 | -90 | 0 | 24 | 0 | 24 | 807 Incl.4m @3.60g/t Aufrom 8m |
| BKAU0390 | 394062 | 1189599 | 396 | -90 | 0 | 25 | 0 | 25 | 262 |
| BKAU0426 | 396302 | 1194040 | 406 | -90 | 0 | 25 | 0 | 25 | 263 |
| BKAU0467 | 394541 | 1187441 | 389 | -90 | 0 | 15 | 0 | 15 | 965 Incl.4m @1.39g/t Aufrom 8m |
| BKAU0492 | 396063 | 1194121 | 390 | -90 | 0 | 24 | 0 | 24 | 294 |
| BKAU0518 | 394623 | 1187598 | 397 | -90 | 0 | 21 | 0 | 21 | 521 |
| BKAU0520 | 396462 | 1194520 | 411 | -90 | 0 | 20 | 0 | 20 | 1344 Incl.4m @6.01g/t Aufrom 0m |
| BKAU0584 | 395822 | 1194523 | 392 | -90 | 0 | 20 | 0 | 20 | 738 Incl.4m @3.27g/t Aufrom 4m |
| BKAU0587 | 395583 | 1194525 | 391 | -90 | 0 | 11 | 0 | 11 | 345 |
| BKAU0658 | 394381 | 1187681 | 405 | -90 | 0 | 23 | 0 | 23 | 401 |
| Note 1: Power auger drilling is carried out with a 4WD mounted auger rig capable of drilling vertical holes up to 30m deep. The target depth on this drill program was 24m. Up to 6 samples were collected in 4m intervals and assayed for gold. The prepared drill samples were sent to the SGS laboratory in Bamako, Mali for pulverisation and fire assay gold analysis. Reported (colour coded) results are for a calculated length- weighted composite starting from a depth of 0m to the end of each hole. The RL range for the power auger grid in the project areas are shown above in metres. Individual RLs are not reported in this announcement because they are not relevant to interpreting auger drill data of this type. |
|||||||||
| Trenches | |||||||||
| Hole numbers | Northing (WGS84- 29N) |
Easting (WGS84 – 29N) |
RL | Hole dips | Azimuth | Hole Depth | From | Interval | Au (ppb) |
| BKTR003 | 394518 | 1187446 | 388 | 153 | 0 | 24 | 0 | 24 | NSR |
| BKTR004 | 394524 | 1187426 | 388 | 114 | 0 | 10 | 6 | 4 | 456 |
| BKTR005 | 394564 | 1187414 | 388 | 295 | 0 | 7 | 0 | 2 | 433 |
| BKTR006 | 394555 | 1187412 | 388 | 295 | 0 | 15 | 0 | 15 | NSR |
| BKTR007 | 394536 | 1187414 | 389 | 275 | 0 | 15 | 0 | 15 | NSR |
ASX: PDI | 19[th] July 2021
| BKTR008 | 394579 | 394579 | 1187405 | 1187405 | 389 | 285 | 285 | 0 | 0 | 7 | 7 | 0 | 0 | 7 | NSR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Note 2: Trenches - a backhoe was used to dig trenches 2.5m deep by 2m wide. The floor of the trenches were sampled using a chisel and hammer to create ~2.5kg composite samples over 2m intervals that were assayed for gold. Trenches are treated as horizontal holes. |
|||||||||||||||
| Surface Samples - Rocks | |||||||||||||||
| Note 3: Significant results only greater than 1g/t Au Other reconnaissance rock sample locations are shown onplans. SampleID Northing (WGS84- 29N) Easting (WGS84 – 29N) RL Au g/t Licence PDG0012799 1187445 394480 417 7.06 Bokoro PDG0013159 1193800 395860 412 1.49 Argo PDG0013163 1193900 395955 412 1.62 Argo PDG0013165 1194000 395880 412 2.76 Argo PDG0013166 1194000 395836 413 2.53 Argo PDG0013167 1194100 395820 414 7.17 Argo PDG0013169 1194100 395900 412 2.02 Argo PDG0013173 1194200 395800 414 1.17 Argo PDG0013181 1194400 395800 416 14.1 Argo PDG0013182 1194400 395775 415 1.16 Argo PDG0013183 1194400 395750 415 8.08 Argo PDG0013188 1194490 395750 415 8.24 Argo PDG0013191 1194520 395840 415 7.19 Argo PDG0013199 1193636 395857 409 1.71 Argo PDG0013206 1193210 395770 411 2.94 Argo |
SampleID | Northing (WGS84- 29N) |
Easting (WGS84 – 29N) |
RL | Au g/t | Licence | |||||||||
| PDG0012799 | 1187445 | 394480 | 417 | 7.06 | Bokoro | ||||||||||
| PDG0013159 | 1193800 | 395860 | 412 | 1.49 | Argo | ||||||||||
| PDG0013163 | 1193900 | 395955 | 412 | 1.62 | Argo | ||||||||||
| PDG0013165 | 1194000 | 395880 | 412 | 2.76 | Argo | ||||||||||
| PDG0013166 | 1194000 | 395836 | 413 | 2.53 | Argo | ||||||||||
| PDG0013167 | 1194100 | 395820 | 414 | 7.17 | Argo | ||||||||||
| PDG0013169 | 1194100 | 395900 | 412 | 2.02 | Argo | ||||||||||
| PDG0013173 | 1194200 | 395800 | 414 | 1.17 | Argo | ||||||||||
| PDG0013181 | 1194400 | 395800 | 416 | 14.1 | Argo | ||||||||||
| PDG0013182 | 1194400 | 395775 | 415 | 1.16 | Argo | ||||||||||
| PDG0013183 | 1194400 | 395750 | 415 | 8.08 | Argo | ||||||||||
| PDG0013188 | 1194490 | 395750 | 415 | 8.24 | Argo | ||||||||||
| PDG0013191 | 1194520 | 395840 | 415 | 7.19 | Argo | ||||||||||
| PDG0013199 | 1193636 | 395857 | 409 | 1.71 | Argo | ||||||||||
| PDG0013206 | 1193210 | 395770 | 411 | 2.94 | Argo |
TABLE 3 - JORC CODE – DIAMOND DRILLING
Section 1: Sampling Techniques and Data
JORC Code Criteria Commentary Explanation
Sampling Nature and quality of sampling (eg cut Technique channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as downhole gamma sondes, or handheld XRF instruments, etc). These examples should not be taken as limiting the broad meaning of sampling Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used. Aspects of the determination of mineralisation that are Material to the Public Report.
Samples assayed were cut drill core.
Core was cut in half with a core saw where competent and with a knife in soft saprolite in the upper sections of the diamond drill holes.
Sampling was supervised by qualified geologists.
Samples were dried, crushed and pulverised at the SGS laboratory in Bamako to produce a 50g fire assay charge.
In cases where ‘industry standard’ work has been done this would be relatively simple (eg ‘reverse circulation drilling was used to obtain 1 m samples from which 3 kg was pulverised to produce a 30 g charge for fire assay’). In other cases more explanation may be required, such as
ASX: PDI | 19[th] July 2021
|||ASX: PDI | 19thJuly 2|
|---|---|---|
||where there is coarse gold that has
inherent sampling problems. Unusual
commodities or mineralisation types
(eg submarine nodules) may warrant
disclosure of detailed information.||
|Drilling|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).|Drill types were 2 multipurpose drill rigs and one dedicated diamond
drill rig, all of which are capable of collecting PQ, HQ and NQ core. One
of the multipurpose rigs was being used for RC drilling using a 118mm
diameter reverse circulation hammer but is now only drilling NQ
diameter core. All core is orientated using Reflex digital system.|
|Drill Sample
Recovery|Method of recording and assessing
core and chip sample recoveries
and results assessed.
Measures taken to maximise
sample recovery and ensure
representative nature of the
samples.
Whether a relationship exists
between sample recovery and grade
and whether sample bias may have
occurred due to preferential
loss/gain of fine/coarse material.|Drill core:
Sample recoveries were measured in the normal way for diamond drill
core. Core recoveries were generally excellent except for the saprolite
where some core loss was experienced owing to clayey core being washed
out in the diamond drilling process. Given that most of these saprolite
core loss zones were obtained in mineralised intervals, grade is probably
underestimated in those sections as zones of core loss are assumed to
contain no gold.
Significant sample bias is not expected with cut core.|
|Logging|Whether core and chip samples
have been geologically and
geotechnical logged to a level of
detail to support appropriate
Mineral Resource estimation,
mining studies and metallurgical
studies.
Whether logging is qualitative
or quantitative in nature. Core
(or costean/Trench, channel,
etc) photography.
The total length and percentage of
the relevant intersections logged.|All drill samples were logged systematically for lithology, weathering,
alteration, veining, structure and minor minerals. Minor minerals were
estimated quantitively. A core orientation device was employed enabling
orientated structural measurements to be taken.|
|Sub-Sampling
Technique and
Sample
Preparation|If core, whether cut or sawn and
whether quarter, half or all core
taken. If non-core, whether riffled,
tube sampled, rotary split, etc and
whether sampled wet or dry.
For all sample types, the nature,
quality and appropriateness of the
sample preparation technique.
Quality control procedures adopted
for all sub-sampling stages to
maximise representivity of samples.
Measures taken to ensure that the
sampling is representative of the in situ
material collected, including for
instance results for field
duplicate/second-half sampling.
Whether sample sizes are appropriate
to the grain size of the material being
sampled.|The diamond drill samples were collected by longitudinally splitting
core using a core saw or a knife where core was very soft and clayey.
Half of the core was sent off to the laboratory for assay. The sampling
method is considered adequate for a diamond drilling program of this
type.|
ASX: PDI | 19[th] July 2021
| 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. For geophysical tools, spectrometers, handheld XRF instruments, etc, the parameters used in determining the analysis including instrument make and model, reading times, calibrations factors applied and their derivation, etc. Nature of quality control procedures adopted (eg standards, blanks, duplicates, external laboratory checks) and whether acceptable levels of accuracy (ie lack of bias) and precision have been established. |
All samples were assayed by SGS technique FAA505 for gold with a detection limit of 5ppb Au. All samples with gold values exceeding 10g/t Au were re-assayed using SGS method FAA515 with a detection limit of 0.01g/t Au. Field duplicates, standards and blank samples were each submitted for every 15 samples on a rotating basis. Diamond core field duplicates were obtained by cutting the half core sample into two quarter core samples. As samples are not homogenised some variation is expected. Duplicate and standards analyses were all returned were within acceptable limits of expected values. |
|---|---|---|
| Verification of Sampling and Assaying |
The verification of significant intersections by either independent or alternative company personnel. The use of twinned holes The verification of significant intersections by either independent or alternative company personnel. Discuss any adjustment to assay data |
At this stage, the intersections have not been verified independently. Some partial twin holes have been reported previously, specifically where initial RC precollars (named BNERC*) were not able to be re-entered by the diamond rig resulting in a second hole being drilled within 5m and named BNERDA. Both BNERC and the completed BNERD*A holes therefore have the same hole number (eg. BNERC0005 and BNERD0005A). These holes are sufficiently close to a previously drilled holes to provide confirmation of the location of mineralisation. In addition, KKODD002 was drilled close to aircore hole KKOAC001 and demonstrated that similar, consistent gold mineralisation was present in the near surface. |
| Location of Data points |
Accuracy and quality of surveysused tolocate drill holes (collar and down- hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation. Specification of the grid system used Quality and adequacy of topographic control |
Drill hole collar locations were recorded at the completion of each hole by hand-held GPS. Positional data was recorded in projection WGS84 Zone 29N. Hole locations will be re-surveyed using a digital GPS system at completion of program. |
| Data Spacing and Distribution |
Data spacing for reporting of Exploration Results Whether the data spacing and distribution is sufficient to establish the degree of geological and grade continuity appropriate for the Mineral Resource and Ore Reserve estimation procedure(s) and classifications applied. Whether sample compositing has been applied |
The diamond drill holes were designed to explore the gold mineralised system in fresh rock. A series of DD and RC holes have been drilled on 80m spaced sections at NE Bankan on 40m spaced sections at Bankan Creek. The Company believes that the drill hole spacings being employed at NE Bankan and Bankan Creek will be sufficient for Mineral Resource estimation however this will be determined by the independent Competent Person who will assess if a sufficient understanding of mineralisation continuity has been established. |
| 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. If the relationship between the drilling orientation and the orientation of key mineralised structures is considered to have introduced a sampling bias, this should be assessed and reported if material. |
There is very limited outcrop in the immediate area but based on the small number of geological observations and the overall strike of the anomaly, an east west line orientation with holes inclined to the west was considered most likely to test the target mineralised zone. Results from earlier drilling has now determined that the overall dip of the gold mineralised envelope is to the west at NE Bankan and to the west-south- west at Bankan Creek. All drill holes reported in this release were drilled from west to east (at NE Bankan) or from west-south-west to east-north- east (at Bankan Creek) to obtain near-true widths through the intersected gold mineralisation. |
| Sample Security | The measures taken to ensure sample security |
Core trays are stored in a guarded location close to the nearby Bankan Village. Coarse rejects and pulps will be eventually recovered from SGS in Bamako and stored at Predictive’s field office in Kouroussa. |
ASX: PDI | 19[th] July 2021
| Audits or Reviews | The results of any audits or reviews of sampling techniques and data |
No reviews or audits of sampling techniques were conducted. |
|---|---|---|
| Section 2 Reporting of Exploration Results | ||
| Mineral Tenement and Land Tenure Status |
Type, reference name/number, location and ownership including agreements or material issues with third partiessuch asjoint ventures, partnerships, overriding royalties, native title interests, historical sites, wilderness or national park and environmental settings. The security of the tenure held at the time of reporting along with any known impediments to obtaining a licence to operate in the area. |
The Bankan Gold Project comprises 4 exploration permits, Kaninko (PDI 100%), Saman (PDI 100%), Bokoro (PDI 100%) and Argo JV (right to earn 100% in JV with local partner). Licences are held by Predictive subsidiaries in Guinea or in a joint venture structure. |
| Exploration Done by Other Parties |
Acknowledgment and appraisal of exploration by other parties. |
Predictive is not aware of any significant previous gold exploration over the permits. |
| Geology | Deposit type, geological setting and style of mineralisation. |
The geology of the Bankan Project consists of felsic intrusives including granite and tonalite, with mafic to intermediate volcanics and intrusives. Metasediments including marble, chert and schists have also been observed. |
| 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: • easting and northing of the drill hole collar • elevation or RL (Reduced Level – elevation above sea level in metres) of the drill hole collar • dip and azimuth of the hole • down hole length and interception depth • hole length • If the exclusion of this information is justified on the basis that the information is not Material and this exclusion does not detract from the understanding of the report, the Competent Person should clearly explain why this is the case. |
See Table 1 and the accompanying notes in this table. |
| 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. Where aggregate intercepts incorporate short lengths of high grade results and longer lengths of low grade results, the procedure used for such aggregation should be stated and some typical examples of such aggregations should be shown in detail. The assumptions used for any reporting of metal equivalent values should be clearlystated. |
Diamond drill sampling was generally in one metre intervals. Up to 2m (down-hole) of internal waste is included for results reported at the 0.25g/t Au cut-off grades. Mineralised intervals are reported on a weighted average basis. |
| Relationship Between Mineralisation Widths and Intercept Lengths |
These relationships are particularly important in the reporting of Exploration Results If the geometry of the mineralisation with respect to the drill hole angle is known, its nature should be reported. If it is not known and only the down hole lengths are reported, there should be a clear statement to this effect (eg ‘down hole length, true width not known’). |
True widths have been estimated for intercepts where mineralisation orientation is reasonably clear. |
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|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.|Appropriate maps, cross sections and a longitudinal projection
are included in this release (Figures 1-3, 5-7).|
|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.|Comprehensive reporting of the drill results is provided in Table 1.|
|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.|All other exploration data on this area has been reported previously by
PDI.|
|Further Work|The nature and scale of planned
further work (eg tests for lateral
extensions or large scale step out
drilling.
Diagrams clearly highlighting the areas
of possible extensions, including the
main geological interpretations and
future drilling areas, provided this
information is not commercially
sensitive.|These results form part of a large ongoing program of RC and diamond
drilling. Geological studies will continue to be conducted to
characterise the gold mineralisation going forward.|
TABLE 4 - JORC CODE – POWER AUGER & GEOCHEMICAL RESULTS
Section 1: Sampling Techniques and Data JORC Code Criteria Commentary Explanation Sampling Technique Nature and quality of sampling (eg The sampling described in this report refers to power auger drill cut channels, random chips, or samples, as well as surface geochemical samples which includes specific specialised industry standard measurement tools trenching and rock sampling. appropriate to the minerals under In all the power auger drill holes reported here, 2kg composite samples investigation, such as downhole gamma sondes, or handheld XRF were collected for every composite downhole, nominally 4m. instruments, etc). These examples should not be taken as limiting the In all the trench sampling reported here, ~2.5 kg composite samples broad meaning of sampling were collected for every 2m along the trench. Include reference to measures taken to ensure sample representivity and the appropriate All samples including individual reconnaissance rock chips were calibration of any measurement submitted for fire assay Au (FAA515) analysis at the SGS laboratory in tools or systems used. Aspects of Bamako. the determination of mineralisation that are Material to the Public Report. In cases where ‘industry standard’ work has been done this would be relatively simple (eg ‘reverse circulation drilling was used to obtain 1 m samples from which 3 kg was pulverised to produce a 30 g charge for fire assay’). In other cases more explanation may be required, such as where there is coarse gold that has inherent sampling problems. Unusual commodities or mineralisation
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||types (eg submarine nodules) may
warrant disclosure of detailed
information.||
|Drilling|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,
bywhat method,etc).|The power drilling was carried out using 4WD-mounted power auger rigs.
Trenches of 2.5m deep by 2m wide were dug using a backhoe. The floor of
the trench was then channel sampled using hammer and chisel.|
|Drill Sample Recovery|Method of recording and
assessing core and chip sample
recoveries and results assessed.
Measures taken to maximise
sample recovery and ensure
representative nature of the
samples.
Whether a relationship exists
between sample recovery and
grade and whether sample bias
may have occurred due to
preferential loss/gain of
fine/coarse material.|Sample recovery is not assessed for power auger drilling as it is a
geochemical method. In general, however, recoveries are good because
the hole has to be cleared by the screw-type rods in order for the drill rods
to advance downwards.
Trench sample recovery is good as floor of the trench is cleaned and then
sampled.|
|Logging|Whether core and chip samples
have been geologically and
geotechnical logged to a level of
detail to support appropriate
Mineral Resource estimation,
mining studies and metallurgical
studies.
Whether logging is
qualitative or quantitative
in nature. Core (or
costean/Trench, channel,
etc) photography.
The total length and percentage
of the relevant intersections
logged.|None of these samples will be used in a Mineral Resource estimation.
Nonetheless, all power auger holes, trenches and geochem samples were
geologically logged in a qualitative fashion.|
|Sub-Sampling
Technique and
Sample Preparation|If core, whether cut or sawn and
whether quarter, half or all core
taken. If non-core, whether
riffled, tube sampled, rotary
split, etc and whether sampled
wet or dry.
For all sample types, the nature,
quality and appropriateness of the
sample preparation technique.
Quality control procedures
adopted for all sub-sampling
stages to maximise representivity
of samples.
Measures taken to ensure that the
sampling is representative of the in
situ material collected, including for
instance results for field
duplicate/second-half sampling.
Whether sample sizes are
appropriate to the grain size of the
material beingsampled.|Auger -Each 4 m to 5 m interval in the composite interval was
subsampled using a scoop.
Trench -Each 2m interval in the trench composite was channel sampled by
hammer and chisel onto a tarp along the base of the trench. This was then
collected into each sample bag.
All samples are considered sufficiently representative of the drilled and
trenched material in a geochemical program.
Both company standards and blanks were included in the sample
batches for auger and trenching at a ratio of 1:20. No field duplicates
were collected.|
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| 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. For geophysical tools, spectrometers, handheld XRF instruments, etc, the parameters used in determining the analysis including instrument make and model, reading times, calibrations factors applied and their derivation, etc. Nature of quality control procedures adopted (eg standards, blanks, duplicates, external laboratory checks) and whether acceptable levels of accuracy (ie lack of bias) and precision have been established. |
The analytical method used was a fire assay method (FA515) with a 5ppb Au detection limit which is appropriate for a geochemical drilling program. Company standards and blanks were inserted in batches at a ratio of 1:20. The results of these QC check as well as the laboratory standards, blanks, duplicates and checks indicate the analytical results are suitable for a geochemical drilling program and indicate no bias. |
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| Verification of Sampling and Assaying |
The verification of significant intersections by either independent or alternative company personnel. The use of twinned holes The verification of significant intersections by either independent or alternative company personnel. Discuss any adjustment to assay data |
Hole twinning is not normally practised with power auger drilling. |
| Location of Data points |
Accuracy and quality of surveys used tolocate drill holes (collar and down- hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation. Specification of the grid system used Quality and adequacy of topographic control |
Collar and sample locations were located using a hand held GPS with a location error of +/-3m.All co-ordinates are recorded in Universal Transverse Mercator (UTM), Datum WGS 84, Zone 29 - Northern Hemisphere. |
| Data Spacing and Distribution |
Data spacing for reporting of Exploration Results Whether the data spacing and distribution is sufficient to establish the degree of geological and grade continuity appropriate for the Mineral Resource and Ore Reserve estimation procedure(s) and classifications applied. Whether sample compositing has been applied |
Power auger holes were located on 320m x 80m, 160m x 80m or 80m x 80m grids as required. Trench spacing was ~40m apart This type of drilling and trenching is not appropriate for the calculation of any Mineral Resource estimate. |
| 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. If the relationship between the drilling orientation and the orientation of key mineralised structures is considered to have introduced a sampling bias, this should be assessed and reported if material. |
Most of the reported power auger holes are located on east-west lines 80m to 320m apart based on regional geophysical trends and the known N-S orientation of the NE Bankan mineralisation and the NNW-SSE orientation of the Bankan Creek mineralisation. |
| Sample Security | The measures taken to ensure sample security |
Reference samples are stored at PDI’s sample store in Kouroussa, Guinea. |
| Section 2 Reporting of Exploration Results |
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|Mineral Tenement
and Land Tenure
Status|Type, reference name/number,
location and ownership including
agreements or material issues
with third partiessuch asjoint
ventures, partnerships, overriding
royalties, native title interests,
historical sites, wilderness or
national park and environmental
settings.
The security of the tenure held at
the time of reporting along with
any known impediments to
obtaining a licence to operate in
the area.|The auger drilling was conducted over the Bankan Gold Project which
comprises 4 exploration and reconnaissance permits, Kaninko (100%),
Saman (100%), Bokoro (100%) and Argo JV (right to earn 100%). Permits
are held by Predictive subsidiaries in Guinea or, in the case of Argo, in a
joint venture structure.|
|Exploration Done
by Other Parties|Acknowledgment and
appraisal of exploration by
otherparties.|Predictive is not aware of any significant previous gold exploration over
the permit.|
|Geology|Deposit type, geological
setting and style of
mineralisation.|The geology of the Bankan project permits consists of mafic volcanics
and intrusives, granitic rocks and metasediments.|
|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:
•
easting and northing of
the drill hole collar
•
elevation or RL (Reduced
Level – elevation above sea
level in metres) of the drill
hole collar
•
dip and azimuth of the hole
•
down hole length and
interception depth
•
hole length
•
If the exclusion of this
information is justified on
the basis that the
information is not Material
and this exclusion does not
detract from the
understanding of the
report, the Competent
Person should clearly
explain whythis is the case.|The required information is provided in Table 2.|
|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.
Where aggregate intercepts
incorporate short lengths of high
grade results and longer lengths of
low grade results, the procedure
used for such aggregation should
be stated and some typical
examples of such aggregations
should be shown in detail.
The assumptions used for any
reporting of metal equivalent
values should be clearlystated.|No weighted average or truncation methods were used for the power
auger results, sample composites were only used from 4m depth.
No cut-off grade was applied in the average grade calculation.|
|Relationship Between
Mineralisation Widths
and Intercept Lengths|These relationships are
particularly important in the
reporting of Exploration Results
If the geometry of the
mineralisation with respect to|True widths cannot be estimated for the power auger drill results as
the orientation of the underlying weathered rocks is not known.|
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||the drill hole angle is known, its
nature should be reported. If it
is not known and only the down
hole lengths are reported, there
should be a clear statement to
this effect (eg ‘down hole length,
truewidth notknown’).||
|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.|An appropriate map is provided in Figure 8.|
|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 significant results are reported in Table 2.|
|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.|Apart from the previously reported surface soil samples and the
AC/RC/DD drill results, there are no other exploration data which are
relevant to the results reported in this release.|
|Further Work|The nature and scale of planned
further work (eg tests for lateral
extensions or large scale step out
drilling.
Diagrams clearly highlighting the
areas of possible extensions,
including the main geological
interpretations and future drilling
areas, provided this information is
not commercially sensitive.|Power auger and AC drilling will be carried out to follow up the results
reported in this release.|