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TRUE NORTH COPPER LIMITED Capital/Financing Update 2021

Feb 10, 2021

65934_rns_2021-02-10_e440dc50-6d08-4f3b-aa03-c40e2388465c.pdf

Capital/Financing Update

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ASX Announcement Media Release

==> picture [87 x 88] intentionally omitted <==

==> picture [595 x 106] intentionally omitted <==

AREA OF COPPER AND SILVER MINERALISATION AT MT FLORA MORE THAN DOUBLES IN SIZE

FEBRUARY 11, 2021

Duke Exploration (ASX Code: DEX) is pleased to announce that the first assays have been received from the first completed line of resource drilling at Mt Flora. These are the first assay results from the ongoing resource drilling program at Mt Flora, which follow on from the positive widths and grades of copper and silver mineralisation at the Quarry Anomaly announced on 22 December 2020.

Highlights

  • The first phase of resource RC drilling at Mt Flora has restarted after the Christmas period, with 34 holes completed since the start of the RC drilling programme for a total of 6,271m from a budget of 43 holes for 7,040m,

  • Better intersections from the drilling to date include:

  • 6m at 1.39% Cu, 29.4 g/t Ag and 0.03 g/t Au in MFRC011 from 51m (the Mt Flora underground mine lode),

  • 3m at 2.71% Cu, 11.9 g/t Ag and 0.31 g/t Au in MFRC011 from 100m,

  • 17m at 1.12% Cu, 11.4 g/t Ag and 0.13 g/t Au in MFRC012 from 55m,

  • 16m at 1.17% Cu, 10.5 g/t Ag and 0.08 g/t Au in MFRC014 from 84m,

  • 8m at 2.99% Cu, 69.0 g/t Ag and 0.24 g/t Au in MFRC019 from 61m

  • 6m at 2.18% Cu, 23.8 g/t Ag and 0.10 g/t Au in MFRC020 from 20m.

  • There are 73 intersections of copper, silver and gold mineralisation above a 0.2% Cu cut off from assays to date that will contribute to the maiden resource estimate. Mineralisation is consistent in width, copper grade and orientation between drill holes, which will increase the confidence in future resource estimates and mining studies,

  • Three lines of holes have been completed over the known mineralised area covering a strike of 200m a width of 250m and to a vertical depth of 280m. The holes are on a 60m by 60m drill

Duke Exploration Limited ABN 28 119 421 868 PO Box 765 Kenmore Q 4069 AUSTRALIA www.duke-exploration.com.au

2

spacing. A total of 7,000 samples have been sent to the laboratory in Townsville and 4,222 assay results have been returned to date,

  • The geometry of the massive sulphide copper and silver veins and their spatial relationship to the granodiorite are now better understood and the mineralised area has more than doubled,

  • The mineralised area at Mt Flora is now 500m wide when the Quarry mineralisation and western mineralised veins are included compared to the original interpretation of a 100m wide zone of copper, silver and gold mineralisation,

  • Three holes will be drilled to complete the Phase One drilling to test the conductive anomaly to the north of the main historic underground workings at Mt Flora,

  • Results from the next line to the south are expected to be finalised for announcing in late February and the results of the line to the north by mid-March,

  • Follow up resource drill planning has been finalised at Mt Flora and based on the positive results will commence immediately after the first phase holes have been completed,

  • Electrical geophysical surveys and pXRF soil sampling to follow up and test the extensions of the anomalies discovered at Quorn have started, with results expected by the end of March.

Details of the work reported in this announcement are outlined in Appendix 1 - JORC Code , 2012 Edition, Checklist of Assessment and Reporting Criteria.

Commenting on progress - Toko Kapea, Chairman:

“We are very happy with the results from the first line of resource drilling at Mt Flora, which have not only confirmed our initial interpretations based on the historic data but have more than doubled the mineralised area both down dip and to the west. We are particularly excited that the newly discovered Quarry mineralisation returned the highest grades of copper, silver and gold intersected in our drilling to date and we believe this new discovery will contribute to the growing resource potential at Mt Flora. The next phase of resource drilling, which has been planned, will start immediately after the first phase of drilling is completed with a focus on the Quarry mineralisation. We are also confident that based on results to date we will meet our Exploration Target for Mt Flora as reported in our recent prospectus (5,500,000-12,000,000 tonnes at 0.5-0.7% Cu for 27,000-84,000 tonnes of copper, 5-15g/t Ag for 884,000-5,780,000 ounces of silver and 0.10.1g/t Au for 17,000-38,000 ounces of gold. See www.duke-exploration.com.au to download the Independent Geologists Report for the details of the Exploration Target). The amount of silver and gold associated with the copper mineralisation at Mt Flora also gives us exposure to these valuable metals, which if similar results are confirmed in the next phase of drilling should add significant value for shareholders. Mining and processing studies will start as soon as the scale of the copper, silver and gold resource is defined at Mt Flora. ”

Duke Exploration Limited

www.duke-exploration.com.au

3

Future Work Programme

  • Complete phase one RC drilling at Mt Flora,

  • Start the next phase of infill drilling at Mt Flora guided by the results from the phase one drilling,

  • Start pattern resource drilling at the Quarry Anomaly focussing on the higher grade northern strike extension,

  • Complete follow up geophysics surveys at Quorn to allow planning of a drilling programme to test the results from this work,

  • Extend the gradient array and pXRF soil sampling to cover anomalous areas from the Quorn surveys that are open,

  • Complete gradient array and pXRF soil surveys over the Isens Underground mine area, with the aim of starting drill testing by the second quarter of 2021,

  • Finalise land access and drill planning at the Prairie Creek gold target,

  • Source a second rig to fast-track resource and exploration drilling over Mt Flora, Quorn and the Quarry prospects.

This announcement has been authorised for release by the Board.

Toko Kapea Chairman - t.kapea@duke exploration.com.au Ph+64 27 534 2886

Eugene Iliescu Managing Director - md@duke exploration.com.au Ph +61 418 757 364

Duke Exploration Limited www.duke-exploration.com.au

4

Technical Information

Mt Flora Phase One RC Drilling Results to Date

The Mt Flora prospect is the first high priority target for development in the Bundarra Project area (see www.dukeexploration.com.au for project details). The first phase of resource RC drilling at Mt Flora has restarted after the Christmas period, with 34 holes completed since the start of the RC drilling programme for a total of 6,271m from a budget of 43 holes for 7,040m (Table 1). A total of 7,000 samples have been sent to the laboratory in Townsville and 4,222 assay results have been returned to date, with the next batch of results for the line to the south (Section 7572030 mN) expected to be reported by the end of February and the line to the north on (Section 7572120 mN) by mid-March (Table 1). The next phase of resource drilling, which has been planned, will start immediately after the first phase of drilling is completed, so drilling will continue until the end of June and longer if results are positive.

A phased approach is being taken to the drilling, which initially in Phase One aims to deliver sufficient drilling to estimate an Inferred resource over the known area of mineralisation at Mt Flora (Figure 1). The Phase One drill plan comprises 43 holes for 7,040m and are spaced 60m down dip and along strike of the known mineralisation that was mined historically and intersected in the historic drilling (Figure 1). All drill holes are planned to drill west at between 70-50° to intersect the mineralised lodes dipping 40° to the east. Several planned hole locations are in topographically challenging areas (gorges and shafts), and the hole locations were adjusted for safety and the azimuth and dip of the holes have been amended to account for the changed hole location and still target the mineralised pierce points at 60m drill trace distance. The drill depths have been adjusted based on pXRF copper and silver results as the holes are drilled, with many holes extended as the mineralisation has been intersected deeper than originally interpreted.

Three lines of holes have been completed over the known mineralised area covering a strike of 200m a width of 250m and to a vertical depth of 280m. The holes are on a 60m by 60m drill spacing, which will allow an Inferred resource to be estimated once two additional lines are completed to the south and one additional line to the north. This will provide the required coverage and should close off the known mineralised area that includes all the historic underground workings and historic drill holes (Figure 1 and Figure 2).

The geometry of the massive sulphide copper and silver veins and their spatial relationship to the granodiorite are now better understood and the mineralised area has more than doubled due to the granodiorite contact dipping steeper to the east than originally interpreted, due to the mineralised veins continuing into the granodiorite and due to the mineralised zone being wider than first thought, particularly to the west (compare Figure 3 and Figure 4). The veins have been closed off to the east down-dip, with a down-dip length of 320m, which is more than double than was mapped originally. The mineralisation has also been closed off to the south past the granodiorite contact, although the contact area is mineralised (compare Figure 3 and Figure 4). The mineralisation also plunges to the north parallel to the dip of the granodiorite contact, which means the veins have a greater vertical extent to the north and remain open with the historic hole MFD6 intersecting (Figure 1):

  • 3.1m at 0.76 % Cu, 2 g/t Ag and 0.10 g/t Au from 39.9m,

  • 6.4m at 0.58 % Cu, 5 g/t Ag and 0.07 g/t Au from 60.2m,

  • 4.3m at 1.57 % Cu, 31 g/t Ag and 0.12 g/t Au from 106.5m and

  • 4.1m at 0.35 % Cu, 6 g/t Ag and 0.04 g/t Au from 117.8m.

Duke Exploration Limited

www.duke-exploration.com.au

5

Mineralisation intersected in MFD5 (Figure 1):

  • 35.5m at 0.51 % Cu, 5 g/t Ag and 0.01 g/t Au from 74.6m,

is interpreted to be the most southern intersection of the next vein system that is mapped by the electrical geophysics (Figure 1). The mineralisation remains open to the west and holes are being drilled to test the extensions to mineralisation in that direction. The resource drilling has also been extended to the east to cover the new Quarry mineralisation and pattern resource drilling is planned to include this mineralisation in the maiden resource estimate for Mt Flora. The mineralised area at Mt Flora is now 500m wide when the Quarry

mineralisation and western mineralised veins are included compared to the original interpretation of a 100m wide zone of copper, silver and gold mineralisation (compare Figure 3 and Figure 4).

==> picture [434 x 487] intentionally omitted <==

----- Start of picture text -----

Section 7572090 mN
----- End of picture text -----

Figure 1. Interpretation of potential new zones of copper, silver and gold mineralisation to the north of the Mt Flora underground mines mapped by conductivity in ground EM and GAIP surveys.

Duke Exploration Limited

www.duke-exploration.com.au

6

Figure 2. Mt Flora drill location plan for the holes completed to date at the Quarry Anomaly and Mt Flora relative to the granodiorite contact, showing the historic drill holes, assayed holes and holes with assays pending.

The assay results for the first line of drilling at Mt Flora (Section 7572090 mN) have been returned from the holes that tested the known historic underground workings (MFRC10-MFRC20, not including MFRC017), which comprises 10 holes for 2,057m (Figure 1, Figure 2 and Table 1). New mineralised lodes have been intersected at depth to the west and a hole was completed to test the up-dip continuation of this mineralisation to the west (MFRC 27), which intersected visible copper mineralisation as interpreted from the holes at depth, with the assays still to be returned. The results for all holes assayed have been entered into the drill databases and a quality control review completed. All check samples, blanks and sample weights have been reviewed as part of an ongoing quality control process and returned results within accepted expected statistical ranges, which confirms the validity of the assay results. Better intersections from the drilling on Section 7572090mN to date include:

  • 6m at 1.39% Cu, 29.4 g/t Ag and 0.03 g/t Au in MFRC011 from 51m (the Mt Flora underground mine lode),

  • 3m at 2.71% Cu, 11.9 g/t Ag and 0.31 g/t Au in MFRC011 from 100m,

  • 17m at 1.12% Cu, 11.4 g/t Ag and 0.13 g/t Au in MFRC012 from 55m,

  • 2m at 1.04% Cu, 17.0 g/t Ag and 0.04 g/t Au in MFRC012 from 201m,

  • 24m at 0.36% Cu, 3.6 g/t Ag and 0.03 g/t Au in MFRC013 from 101m,

  • 14m at 0.50% Cu, 4.6 g/t Ag and 0.04 g/t Au in MFRC013 from 129m,

  • 2m at 2.08% Cu, 27.1 g/t Ag and 0.03 g/t Au in MFRC014 from 66m,

Duke Exploration Limited www.duke-exploration.com.au

7

  • 16m at 1.17% Cu, 10.5 g/t Ag and 0.08 g/t Au in MFRC014 from 84m,

  • 8m at 2.99% Cu, 69.0 g/t Ag and 0.24 g/t Au in MFRC019 from 61m,

  • 14m at 0.50% Cu, 6.9 g/t Ag and 0.02 g/t Au in MFRC019 from 73m and

  • 6m at 2.18% Cu, 23.8 g/t Ag and 0.10 g/t Au in MFRC020 from 20m (Figure 4 and Table 2).

There are 73 intersections of copper, silver and gold mineralisation above a 0.2% Cu cut off on the section that will contribute to the planned resource estimate. The mineralisation is consistent in width, copper grade and orientation between drill holes that will increase the confidence in future resource estimates and mining studies.

The assay results from the first line of drilling at Mt Flora have been used to update the geological interpretation of the mineralisation at Mt Flora in relation to the underground workings and granodiorite contact, and the new interpretation can be compared with the original interpretation in Figure 3 and Figure 4. The four historically mined copper lodes have been intersected and nine new massive sulphide veins confirmed by the assay results, taking the total number of veins mapped to thirteen that covers a true width of 345m from the hanging wall vein in the Quarry mineralisation to the footwall vein in the western-most veins (Figure 4). The continuity of the veins is excellent down dip forming a continuous zone of mineralisation from the surface to 310m down dip or a vertical depth of 260m. The veins are less well developed to the east, but a new vein system has been intersected in two holes to the north of the Quarry Anomaly that is interpreted to be the continuation of the Quarry Anomaly to the north into the hornfels, which intersected the highest copper, silver and gold grades intersected in drilling to date, including 10.85% Cu, 261 g/t Ag and 0.89 g/t Au in the intersection for hole MFRC019 listed in Table 2. These holes could extend the strike of the Quarry Anomaly mineralisation by an additional 100m. This mineralisation remains open at depth to the east. This mineralisation also has the highest sulphide content recorded to date with 4.2% S assayed over the 8m wide intersection. This style of sulphide rich mineralisation may be responsible for the electrical geophysical anomalies to the north of Mt Flora (Figure 1) and provide additional evidence that the mineralisation at Mt Flora will extend to the north from the zone drilled to date (Figure 1).

Three holes will be drilled to complete the Phase One drilling to test the conductive anomaly to the north of the main underground workings at Mt Flora (Figure 1). The anomaly has been identified in all VTEM, 3D IP, FLEM and GAIP surveys, and is along strike of the known mineralisation. The pXRF soil geochemistry survey described above in the Mt Flora Soil Sampling section has also identified a copper anomaly with the same orientation as the geophysical trends (Figure 1).

Electrical geophysical surveys to follow up the main anomalies at Quorn and Absolon at depth with 3D IP and EM and test the extensions of the soil anomalies discovered at Quorn using pXRF have started, with results expected by the end of March.

Duke Exploration Limited

www.duke-exploration.com.au

8

==> picture [679 x 415] intentionally omitted <==

Figure 3. Drill section on 7,572,090mN of the original interpretation of the geology of the main copper lodes at Mt Flora constrained by the historic drilling, Mt Flora underground mine workings and the granodiorite contact.

Duke Exploration Limited

www.duke-exploration.com.au

9

==> picture [680 x 416] intentionally omitted <==

----- Start of picture text -----

Quarry Mineralisation
----- End of picture text -----

Figure 4. Drill section on 7,572,090mN of the new interpretation of the geology of the main copper lodes at Mt Flora based on the new resource RC drilling in relation to the historic drilling, Mt Flora underground mine workings and the re-interpreted granodiorite contact. Some of the 73 intersections listed in Table 2 have been left off for clarity.

Duke Exploration Limited

www.duke-exploration.com.au

10

Prospect Hole Type Easting Northing RL Depth Az Dip Status
Quarry
Quarry
Quarry
Quarry
Quarry
Quarry
Quarry
Quarry
Quarry
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Quarry
Quarry
Quarry
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
MFRC001
MFRC002
MFRC003
MFRC004
MFRC005
MFRC006
MFRC007
MFRC008
MFRC009
MFRC010
MFRC011
MFRC012
MFRC013
MFRC014
MFRC015
MFRC016
MFRC017
MFRC018
MFRC019
MFRC020
MFRC021
MFRC022
MFRC023
MFRC024
MFRC025
MFRC026
MFRC027
MFRC028
MFRC029
MFRC030
MFRC031
MFRC032
MFRC033
MFRC034
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
RC
662,722
662,746
662,708
662,779
662,776
662,698
662,861
662,941
662,777
662,185
662,189
662,304
662,374
662,362
662,502
662,554
662,495
662,726
662,729
662,659
662,280
662,349
662,392
662,225
662,302
662,319
662,077
662,322
662,360
662,523
662,518
662,466
662,220
662,182
7,571,851
7,571,842
7,571,968
7,571,969
7,572,027
7,572,014
7,571,966
7,571,970
7,571,925
7,572,106
7,572,107
7,572,086
7,572,092
7,572,091
7,572,082
7,572,079
7,572,030
7,572,089
7,572,089
7,572,090
7,572,032
7,572,029
7,572,035
7,571,730
7,571,730
7,571,850
7,572,090
7,572,144
7,572,150
7,572,144
7,572,144
7,572,142
7,572,144
7,572,030
222
221
230
224
236
233
223
219
222
285
285
305
300
301
278
265
263
264
265
261
283
283
274
218
217
229
261
327
314
296
296
304
305
254
78
79
61
121
137
76
158
206
98
46
182
212
269
284
302
249
249
15
189
309
171
189
225
79
103
103
133
258
309
338
333
333
255
104
288
283
266
270
270
280
270
270
250
250
250
268
265
270
270
280
270
270
270
270
270
270
264
270
270
270
0
274
270
270
270
275
280
270
-60
-80
-50
-50
-60
-60
-50
-50
-50
-60
-70
-50
-80
-55
-55
-55
-55
-55
-55
-55
-55
-55
-65
-55
-55
-55
-90
-55
-60
-72
-55
-55
-55
-55
Unmineralised
Mineralised
Mineralised
Mineralised
Mineralised
Mineralised
Unmineralised
Mineralised
Mineralised
Mineralised
Mineralised
Mineralised
Mineralised
Mineralised
Mineralised
Mineralised
Assays Pending
Abandoned
Mineralised
Mineralised
Assays Pending
Assays Pending
Assays Pending
Assays Pending
Assays Pending
Assays Pending
Assays Pending
Assays Pending
Assays Pending
Assays Pending
Assays Pending
Assays Pending
Assays Pending
Assays Pending

Table 1. Drill collar details of Mt Flora Resource RC holes (MGA94 Zone 55).

Duke Exploration Limited

www.duke-exploration.com.au

11

Hole Prospect Easting Northing RL From To Width Cu % Ag g/t Au g/t
MFRC010
MFRC010
MFRC011
MFRC011
including
MFRC011
MFRC011
including
MFRC011
MFRC011
MFRC011
MFRC012
MFRC012
MFRC012
MFRC012
MFRC012
including
MFRC012
MFRC012
MFRC012
MFRC012
MFRC012
MFRC012
MFRC012
MFRC012
MFRC013
MFRC013
MFRC013
MFRC013
MFRC013
MFRC013
MFRC013
MFRC013
MFRC013
MFRC013
MFRC013
MFRC014
MFRC014
MFRC014
MFRC014
MFRC014
MFRC014
including
MFRC014
MFRC014
MFRC014
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
662,185
662,164
662,175
662,171
662,160
662,154
662,146
662,141
662,135
662,302
662,290
662,282
662,275
662,263
662,250
662,240
662,230
662,216
662,211
662,195
662,179
662,174
662,370
662,365
662,363
662,360
662,359
662,357
662,354
662,350
662,347
662,346
662,344
662,361
662,356
662,347
662,342
662,332
662,323
662,317
662,309
662,293
7,572,106
7,572,099
7,572,102
7,572,100
7,572,097
7,572,096
7,572,093
7,572,092
7,572,090
7,572,086
7,572,086
7,572,085
7,572,085
7,572,084
7,572,084
7,572,083
7,572,083
7,572,083
7,572,083
7,572,082
7,572,082
7,572,082
7,572,092
7,572,091
7,572,091
7,572,091
7,572,090
7,572,090
7,572,090
7,572,090
7,572,090
7,572,089
7,572,089
7,572,091
7,572,091
7,572,091
7,572,091
7,572,091
7,572,091
7,572,091
7,572,091
7,572,091
284
246
244
235
206
191
171
157
142
302
288
279
271
257
242
232
221
206
201
185
169
164
281
252
241
227
217
206
189
166
143
136
129
301
293
280
274
258
246
238
226
203
0.0
45.0
43.0
51.0
55.0
84.0
100.0
101.0
121.0
137.0
153.0
0.0
21.0
33.0
40.0
55.0
55.0
82.0
97.0
109.0
132.0
139.0
161.0
184.0
191.0
18.0
44.0
60.0
70.0
83.0
94.0
101.0
129.0
157.0
166.0
173.0
0.0
10.0
24.0
32.0
52.0
66.0
66.0
77.0
84.0
118.0
1.0
46.0
44.0
57.0
56.0
85.0
103.0
102.0
125.0
138.0
155.0
8.0
24.0
34.0
50.0
72.0
56.0
84.0
98.0
115.0
133.0
141.0
163.0
185.0
192.0
21.0
54.0
61.0
79.0
86.0
97.0
125.0
143.0
161.0
167.0
174.0
1.0
11.0
27.0
35.0
53.0
68.0
67.0
78.0
100.0
121.0
1.0
1.0
1.0
6.0
1.0
1.0
3.0
1.0
4.0
1.0
2.0
8.0
3.0
1.0
10.0
17.0
1.0
2.0
1.0
6.0
1.0
2.0
2.0
1.0
1.0
3.0
10.0
1.0
9.0
3.0
3.0
24.0
14.0
4.0
1.0
1.0
1.0
1.0
3.0
3.0
1.0
2.0
1.0
1.0
16.0
3.0
0.24
0.80
0.35
1.39
5.69
0.40
2.71
6.74
0.56
0.40
0.47
0.26
0.41
0.31
0.90
1.12
7.14
0.33
0.56
0.52
0.92
1.04
0.38
0.34
0.46
0.45
0.28
0.42
0.23
0.70
0.32
0.36
0.50
0.43
0.26
0.41
0.24
0.35
0.27
0.44
0.95
2.08
3.79
0.20
1.17
0.21
0.5
13.5
3.2
29.4
134.0
9.7
11.9
28.9
4.5
4.6
6.7
2.0
5.5
7.9
11.8
11.4
58.1
4.9
11.3
6.2
6.3
17.0
8.5
3.2
3.9
6.8
3.3
9.2
3.5
8.1
3.4
3.6
4.6
7.2
5.5
4.0
0.3
1.9
5.2
4.8
15.8
27.1
49.3
3.9
10.5
3.3
0.007
0.011
0.039
0.030
0.120
0.009
0.309
0.740
0.063
0.014
0.016
0.015
0.016
0.011
0.048
0.127
1.610
0.012
0.015
0.024
0.080
0.040
0.018
0.011
0.019
0.015
0.014
0.008
0.008
0.037
0.024
0.033
0.039
0.013
0.009
0.012
0.008
0.013
0.008
0.031
0.047
0.033
0.060
0.003
0.084
0.012

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Hole Prospect Easting Northing RL From To Width Cu % Ag g/t Au g/t
MFRC014
MFRC014
MFRC014
MFRC014
MFRC014
MFRC014
MFRC015
MFRC015
MFRC015
MFRC015
MFRC015
MFRC015
MFRC015
MFRC015
MFRC015
MFRC015
MFRC015
MFRC015
MFRC016
MFRC016
MFRC016
MFRC016
MFRC016
MFRC016
MFRC016
MFRC019
MFRC019
including
including
including
MFRC019
MFRC020
MFRC020
MFRC020
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Mt Flora
Quarry
Quarry
Quarry
Quarry
Quarry
Quarry
662,280
662,273
662,267
662,241
662,237
662,236
662,495
662,477
662,455
662,451
662,443
662,424
662,409
662,399
662,394
662,386
662,367
662,358
662,543
662,515
662,491
662,471
662,462
662,435
662,419
662,720
662,691
662,683
662,652
662,646
662,586
7,572,091
7,572,091
7,572,091
7,572,091
7,572,091
7,572,091
7,572,082
7,572,082
7,572,082
7,572,082
7,572,082
7,572,082
7,572,082
7,572,082
7,572,082
7,572,082
7,572,082
7,572,082
7,572,081
7,572,086
7,572,090
7,572,094
7,572,095
7,572,100
7,572,103
7,572,089
7,572,089
7,572,089
7,572,090
7,572,090
7,572,090
184
175
166
128
124
121
268
242
211
205
194
166
146
131
124
112
86
72
250
209
174
145
132
93
70
253
211
199
252
242
157
140.0
151.0
163.0
210.0
216.0
219.0
12.0
43.0
80.0
89.0
102.0
136.0
154.0
179.0
188.0
200.0
234.0
251.0
18.0
68.0
111.0
146.0
162.0
208.0
238.0
14.0
61.0
63.0
64.0
65.0
73.0
11.0
20.0
127.0
146.0
158.0
166.0
212.0
217.0
220.0
13.0
44.0
83.0
90.0
104.0
137.0
169.0
181.0
189.0
205.0
235.0
252.0
19.0
69.0
112.0
147.0
163.0
211.0
239.0
15.0
69.0
64.0
65.0
66.0
87.0
12.0
26.0
128.0
6.0
7.0
3.0
2.0
1.0
1.0
1.0
1.0
3.0
1.0
2.0
1.0
15.0
2.0
1.0
5.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
3.0
1.0
1.0
8.0
1.0
1.0
1.0
14.0
1.0
6.0
1.0
0.46
0.25
0.77
0.65
0.24
0.26
0.25
0.25
0.34
0.29
0.27
0.21
0.26
0.29
0.30
0.31
0.27
0.65
0.37
0.44
0.22
0.91
0.46
0.29
0.20
0.36
2.99
10.85
5.70
4.41
0.50
0.38
2.18
0.25
3.5
3.9
8.3
6.2
3.7
5.2
2.0
4.4
3.5
2.1
2.1
1.8
2.1
2.1
2.9
3.6
2.8
11.2
6.2
10.4
1.2
12.3
6.7
3.5
4.1
6.5
69.0
261.0
206.0
91.5
6.9
16.8
23.8
2.4
0.037
0.008
0.008
0.025
0.003
0.003
0.043
0.003
0.036
0.014
0.019
0.013
0.023
0.058
0.010
0.007
0.005
0.016
0.006
0.008
0.027
0.036
0.009
0.015
0.006
0.064
0.244
0.481
0.887
0.148
0.017
0.031
0.102
0.022

Table 2. Drill intersections from the scout RC drilling of the Quarry Anomaly using a 0.2% Cu cut off, with a minimum width of 1 metre and including 3 metres of internal waste (MGA94 Zone 55).

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About Duke Exploration

Duke is an Australian exploration company with majority interests in three granted exploration tenements for copper, gold and silver exploration areas located in Queensland and New South Wales, Australia.

Duke’s key assets comprise:

  • EPM26499 and EPM2747 – Bundarra Project (100% owned copper exploration project near Mackay, Queensland);

  • EPM 26852 – Prairie Creek Project (91% owned (9% Capgold) gold exploration project near Rockhampton, Queensland); and

  • EL 8568 – Red Hill Project (100% owned copper exploration project near Red Hill, New South Wales).

In addition, there is one application for an EPM in progress in Queensland (the Waitara Application, EPMA 27069) to extend the area of the Bundarra Project. Duke also has an interest in four New South Wales Cu-Au porphyry tenements currently operated by Lachlan Resources Pty Ltd, a wholly owned subsidiary of ASX listed Emmerson Resources (ASX:ERM). Duke holds a 5% interest in two of these tenements and a 10% interest in the other two tenements.

The highest priority target for the Company is the Mt Flora Prospect in the Bundarra Project, one of the numerous Bundarra Project’s prospects, which has resource development potential for copper, silver and gold. All historic data from the mine at the Mt Flora Prospect has been checked in the field by diamond drilling and ground geophysics, which have confirmed the tenor and scale of copper, silver and gold mineralisation mined previously. There are five other areas with similar development potential on the Bundarra Project as defined by historic mining, geology and geophysics.

Our aim in the next two years is to develop an Indicated Mineral Resource at the Mt Flora Prospect to allow feasibility studies to be undertaken and o delineate additional Inferred Mineral Resources from the current known exploration target areas. The Company also intends to drill the more conceptual exploration targets on the Prairie Creek Project and Red Hill Project (see www.duke-exploration.com.au for more project details).

Competent person statement

The information in the ASX announcement is based on information compiled by Dr Gregor Partington, who is a Member of The Australasian Institute of Mining and Metallurgy and a Member of the Australian Institute of Geoscientists. Dr Gregor Partington has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking 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’ (the JORC Code).

Dr Gregor Partington is engaged by Duke Exploration as Operations Manager and consents to the inclusion of the information in the ASX announcement in the form and context in which it appears.

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14

Appendix 1 - JORC Code, 2012 Edition, Checklist of Assessment and Reporting Criteria

Section 1 Sampling Techniques and Data

(Criteria in this section apply to all succeeding sections.)

Criteria JORC Code explanation JORC Code explanation Commentary Commentary
Sampling Nature and quality of sampling (e.g. cut channels, random
One-metre primary samples were collected using a
techniques chips, or specific specialised industry standard reverse circulation drill rig, which when split is
measurement tools appropriate to the minerals under approximately 10% of the total meter sample. The quality
investigation, such as down hole gamma sondes, or of the sample has been being actively measured using
handheld XRF instruments, etc). These examples should various quality control techniques, focusing on keeping
not be taken as limiting the broad meaning of sampling. holes dry, reducing dust loss and optimising sample
Include reference to measures taken to ensure sample delimitation. The quality of the sampling has been
representivity and the appropriate calibration of any independently reviewed and is deemed to be high, and
measurement tools or systems used. fit-for-purpose to be used in mineral resource
Aspects of the determination of mineralisation that are estimations. Various quality control metrics are actively
Material to the Public Report. monitored to ensure the quality of samples collected.
In cases where ‘industry standard’ work has been done Such measures include:
this would be relatively simple (e.g. ‘reverse circulation
Every effort is made to ensure all samples are drilled
drilling was used to obtain 1 m samples from which 3 kg dry and when this is not possible samples are logged
was pulverised to produce a 30 g charge for fire assay’). In as wet, and the quality designation ranking lowered
other cases more explanation may be required, such as and taken into account in the resource estimation.
where there is coarse gold that has inherent sampling
The measuring and monitoring of total RC sample
problems. Unusual commodities or mineralisation types weights to measure total recovery and metre
(e.g. submarine nodules) may warrant disclosure of delineation of the drilling (after correcting for
detailed information. density based on lithology averages and volume
differences based on bit size)
pXRF analysis for some alteration and common rock-
forming elements was carried out on every metre by
taking a small ~25g sample from the bulk RC sample and
analysing using an Olympus Vanta M series XRF Analyser
with all three beams enabled with each beam set to 10
seconds each.
Calibration checks were performed by the handheld XRF
analysers at least once fortnightly to ensure that the
analyser was operating within factory specifications
Drilling Drill type (e.g. core, reverse circulation, open-hole Reverse circulation drilling equipment with face
techniques hammer, rotary air blast, auger, Bangka, sonic, etc) and sampling hammers were used to collect samples. The
details (e.g. core diameter, triple or standard tube, depth drilling was conducted by a McCulloch DR 800 drill rig
of diamond tails, face-sampling bit or other type, whether with Sullair 350/1100 compressor, a Mercedes powered
core is oriented and if so, by what method, etc). 350/1100 Sullair compressor. Boosters is a Detroit 8V92
type 650 psi to a maximum of 900psi. All drill bits used
were face sampling Schramm 650 series 143 mm, had a
shroud size of 141 mm, and they were sized to suit as
they wore. Teeth are 8 PCD outer and 9 tungsten inner
teeth. All rods wereManutech Rods which are 6 metres
long 4 inch outside diameter. All sample hoses are 3 inch
Inside diameter.
Drill sample Method of recording and assessing core and chip sample All sample recovery information was digitally recorded on
recovery recoveries and results assessed. the rig using locked auto-validating excel spreadsheets.
Measures taken to maximise sample recovery and ensure Samples were weighed using digital scales and recoveries
representative nature of the samples. were estimated based on average density of logged
Whether a relationship exists between sample recovery lithology, bit diameter (indicating volume of sample) and
and grade and whether sample bias may have occurred total sample weight. The recovery was constantly
due to preferential loss/gain of fine/coarse material. monitored using live-updating graphs indicating when
recoveries were out of control or showing unfavourable
trends.
An auxiliary booster was used to maximise air pressure to
improve sample recovery, which allowed holes to be
drilled dry. Where samples were drilled wet they have
been logged as such. Furthermore, constant monitoring
of recoveries via measurement and evaluation of total
sample weights on the rig enable recoveries to be
maximised.

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Criteria JORC Code explanation JORC Code explanation Commentary Commentary
There is no relationship between sample recovery and
grade and no correction or weighting factors were
required.
Logging Whether core and chip samples have been geologically Chip samples have been geologically and geotechnically
and geotechnically logged to a level of detail to support logged to a level of detail to support mineral resource
appropriate Mineral Resource estimation, mining studies estimation, mining studies and metallurgical studies. All
and metallurgical studies. chip samples have been geologically logged to 1m
Whether logging is qualitative or quantitative in nature. resolution on the rig recording information on rock type,
Core (or costean, channel, etc) photography. mineralogy, mineralisation, fabrics, and textures. This
The total length and percentage of the relevant logging is paired with logging conducted using the
intersections logged. downhole Televiewer information which can log to at
least 10cm resolution and records structural information
for contacts, foliation, banding, veining etc. in the form
of dip and dip direction measurements., resistivity,
natural gamma and density measurements are also used
to assist this logging.
The logging for the RC drilling was qualitative for the
geological data collection and quantitative for structural,
geotechnical and geochemical data. A hand held XRF
was used to collect continuous geochemical data and
Televiewer optical and acoustic data collection allows
the measurement of structural and geotechnical data.
All one metre samples from the drilling have been
geologically logged and the geological data recorded in
the drill database. Subsamples were also collected and
stored in chip trays for future reference.
Sub- If core, whether cut or sawn and whether quarter, half or All other samples were split using a cone splitter fixed to
sampling all core taken. the side of the drill rig, a device aimed at reducing
techniques
and sample

If non-core, whether riffled, tube sampled, rotary split, etc
and whether sampled wet or dry.
For all sample types, the nature, quality and
splitting variance. Holes were kept dry wherever
possible using an auxiliary booster. The cone Splitter is
able to deal with wet samples without introducing bias.
preparation appropriateness of the sample preparation technique. This has been independently reviewed and is considered
Quality control procedures adopted for all sub-sampling an appropriate technique to collect large-volume
stages to maximise representivity of samples. samples when extractor, delimitation and preparation
Measures taken to ensure that the sampling is errors are well managed.
representative of the in situ material collected, including For this project, the quality assurance and quality
for instance results for field duplicate/second-half control on the primary calico sample were excellent,
sampling. resulting in good metre delineation, minimal sample loss
Whether sample sizes are appropriate to the grain size of and good water management.
the material being sampled. RC drill chips were delivered to a cone splitter, then
weighed on receipt at the laboratory and dried in an LPG
oven for 24hrs @ 95° C. Samples to 3kg are full
pulverised to 85% passing 75µm in a FLSmidth LM5 mill.
Samples >3kg are spilt 50:50 using a 25mm aperture
riffle splitter prior to pulverising. Samples were then
scooped from the LM5 bowl and put into brown paper
bags, after which the final charge weight was prepared
by scooping from the bag using a spoon.
The quality of the sampling preparation has been
discussed in the announcement text and is considered of
very good quality, supported by sufficient quality control
data (duplicates). The techniques have all been
independently reviewed and are all considered
appropriate and fit for purpose.
The sample size is considered appropriate for the
mineralisation style.
Quality of The nature, quality and appropriateness of the assaying The nature of the laboratory processes has been
assay data and laboratory procedures used and whether the discussed in the announcement text in more detail. The
and
laboratory
technique is considered partial or total.
For geophysical tools, spectrometers, handheld XRF
instruments, etc, the parameters used in determining the
total 50g fire assay technique with aqua regia digest and
AAS finish is considered appropriate for Au analysis. ME-
ICP was used to analyse a total of 33 elements, including
tests analysis including instrument make and model, reading Cu and Ag. When a sample returned a value exceeding
times, calibrations factors applied and their derivation, the analysis limit of Cu or Ag, the sample was re-
etc. analysed using an ore grade analysis method to
Nature of quality control procedures adopted (e.g. accurately define the final analysis grade. The quality
standards, blanks, duplicates, external laboratory checks) was carefully controlled by both Duke and ALS.
and whether acceptable levels of accuracy (i.e. lack of A pXRF Vanta m-series analysed each sample using 3
bias) andprecision have been established. beams ingeochemistrymode. Each beam was set to 10

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Criteria JORC Code explanation JORC Code explanation Commentary Commentary
seconds for a total of 30 seconds and targeting 39
elements, specifically anomalous copper. The pXRF
Vanta m-series was calibrated once a week and the
prolene pXRF windows were changed upon noticing any
imperfection on the surface. A blank standard was
analysed once a week or following the prolene window
change.
QC samples were inserted in the form of Certified
Reference Materials, blanks, crush duplicates and pulp
duplicates. The results showed the laboratory delivered
consistent results throughout the campaign. Bias and
variance acceptance testing showed positive results,
with the only issue noted the elevated variability in
pulps.
Verification The verification of significant intersections by either All significant intersections were inspected and verified
of sampling independent or alternative company personnel. by the Competent Person.
and The use of twinned holes. The data is collected via Duke Exploration Ltd's auto-
assaying Documentation of primary data, data entry procedures,
data verification, data storage (physical and electronic)
validating, controlled spreadsheets with drop down
menu entry. These sheets are loaded into an Access
protocols. database using automatic scripting and are then
Discuss any adjustment to assay data. subjected to a range of further tests for errors. Any
issues were communicated to site within 24 hours and
resolved before the data was accepted. The data is then
validated within the database and brought into
Micromine and further visual checks conducted. One
database administrator conducts all data merging and
storage into the database to ensure the integrity of the
data.
No data has been adjusted.
Location of Accuracy and quality of surveys used to locate drill holes The drill holes have been accurately surveyed using a
data points (collar and down-hole surveys), trenches, mine workings mmGPS in MGA 94/Zone 54.
and other locations used in Mineral Resource estimation. Downhole survey data was collected using a North
Specification of the grid system used. seeking solid state gyro during the downhole data
Quality and adequacy of topographic control. acquisition. The gyro results were checked by the down
hole surveyor by comparing them with the deviation
data obtained with other down hole tools (OPTV and
ATV) and by duplicating a total of three surveys. The
location accuracy of sample data points is considered by
the Competent person to be highly accurate and
properly quality controlled.
Topographic control has been adopted from a recent
aerial geophysical programme and has been corrected
to height values from the DGPS survey. The topographic
control is considered to be highly accurate.
Data Data spacing for reporting of Exploration Results. The drilling reported has been carried out on a
spacing and Whether the data spacing and distribution is sufficient to 60mx60m grid. The holes are drilled to an average depth
distribution establish the degree of geological and grade continuity of around180m.
appropriate for the Mineral Resource and Ore Reserve Geological and grade continuity has been confirmed
estimation procedure(s) and classifications applied. across the 60m drill spacing.
Whether sample compositing has been applied. No physical compositing of samples has occurred in this
drilling.
Orientation Whether the orientation of sampling achieves unbiased The drilling orientation has been determined via
of data in sampling of possible structures and the extent to which Televiewer structural interpretation and hole are
relation to
geological
this is known, considering the deposit type.
If the relationship between the drilling orientation and the
orientation of key mineralised structures is considered to
oriented perpendicular to the main banding and
foliation surface. Where the terrain is challenging the
drill pads were moved along the line and the drill dip
structure have introduced a sampling bias, this should be assessed was steepened to intersect the drill target at depth. In
and reported if material. these circumstances the drill intersection is not
perpendicular to the geological structures or
mineralisation.
There is no apparent bias in any of the drilling
orientations used.
Sample The measures taken to ensure sample security. All samples were removed from site on the day of drilling
security and stored inside a secure warehouse facility. The
samples were transported by a certified freight company
to ALS Laboratories. The samples are not left unattended

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Criteria JORC Code explanation JORC Code explanation Commentary Commentary
and a chain of custody is maintained throughout the
shipping process.
Audits or The results of any audits or reviews of sampling No audits have been conducted by external parties at this
reviews techniques and data. stage. Internal review by various company personnel has
occurred.

Section 2 Reporting of Exploration Results

(Criteria listed in the preceding section also apply to this section.)

Criteria JORC Code explanation JORC Code explanation Commentary Commentary
Mineral Type, reference name/number, location and EPM 26499 ‘Bundarra’ is located south of Nebo, QLD,
tenement and ownership including agreements or material issues and is held 100% by Duke Exploration Ltd. Parts of
land tenure with third parties such as joint ventures, partnerships,
overriding royalties, native title interests, historical
the tenement have native title interests with the
Barada Barna people.
status sites, wilderness or national park and environmental No known impediments.
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.
Exploration Acknowledgment and appraisal of exploration by Production at Mt Flora began in the 1880s. Numerous
done by other other parties. shafts, to a maximum depth of 38 m, adits and
parties surface workings were developed. Mining continued
during the 1970s. Exploration since the 1960s
included geological mapping (Endeavour Oil 1974-75)
soil surveys (CRA Exploration 1962, Endeavour Oil
1974-75, Regency Resources 2005), rock chip
sampling (Endeavour Oil 1974-75, Chesterfield
Mining and Exploration 1983, Elliot Exploration 1987,
Dominion Gold Operations 1991, Queensland Metals
Corporation 1994), Geophysics (magnetics by Planet
Metals in 1967 and Elliot Exploration 1987, gravity by
Carpentaria Gold in 1984, IP by Endeavour Oil in
1975, and VTEM by Regency in 2014). Endeavour Oil
drilled six diamond drillholes in 1975, and
Queensland Metals Corporation drilled two
percussion holes in 1994. Endeavour Oil 1974-75
carried out trial underground mining, metallurgical
test work and resource estimation. Endeavour Oil did
extensive work at Mt Flora from 1974-76, including
detailed 1:500 scale mapping, rock chip sampling,
geophysics, drilling and extending adits and shaft
sinking. Petrology was done on ore material taken
from the base of a shaft sunk on the Flora lode in
1972 (Endeavour Oil, 1974). Near surface narrow lode
mineralisation was detected in the Mt Flora area
using IP geophysics, and Endeavour Oil considered IP
to be a useful reconnaissance tool. Six diamond holes
were drilled to successfully test IP anomalies at
depth. In 1974-75 Endeavour Oil undertook a mining
exploration programme and used this work to
complete a resource estimate for the Mt Flora lodes.
Elliot Exploration re-assayed the Endeavour Oil core
for gold in 1987. In 1994 Normandy drilled two holes:
MFP 01 and MFP 02 near the top of Mt Flora, and
Regency Mines 2001-2013 did mapping and soil
sampling, and apparently drilled RC holes in 2001,
although no data were reported.
Geology Deposit type, geological setting and style of Copper, gold, silver and molybdenum mineralisation
mineralisation. at Mt Flora is located within 300 m of the contact
zone between the Bundarra Granodiorite and Back
Creek Groupsediments. In the Mt Flora area,shale,

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Criteria JORC Code explanation JORC Code explanation Commentary Commentary
siltstone and sandstone has been contact
metamorphosed to an andalusite hornfels.
Mineralisation at Mt Flora occurs in structurally
controlled lodes, which crosscut the granodiorite-
sediment contact, with mineralisation occurring on
both sides of the contact. Mineralisation is hosted by
faults and fractures, associated with sheeted quartz
veins, hematite, limonite and pyrite. The lodes have
massive sulphides with high copper percentages
(>10%). Silver and zinc are present, as well as
molybdenum and gold.
Drill hole A summary of all information material to the See Table 1 and Table 2 in the main text.
Information understanding of the exploration results including a
tabulation of the following information for all
Material drill holes:
o
easting and northing of the drill hole collar
o
elevation or RL (Reduced Level – elevation above
sea level in metres) of the drill hole collar
o
dip and azimuth of the hole
o
down hole length and interception depth
o
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.
Data In reporting Exploration Results, weighting averaging Intervals were composited in Micromine, using a
aggregation techniques, maximum and/or minimum grade weighted average technique at a 0.2% Cu cut off,
methods truncations (e.g. cutting of high grades) and cut-off
grades are usually Material and should be stated.
allowing 3 m of internal dilution and a 1 m minimum
width.
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 clearly stated.
Relationship These relationships are particularly important in the The mean copper-mineralised vein direction is
between reporting of Exploration Results. 40/099, while the drillholes were 55/270. This means
mineralisation
widths and
If the geometry of the mineralisation with respect to
the drill hole angle is known, its nature should be
reported.
the drillholes are close to perpendicular to the mean
vein direction, and true widths are close to intercept
lengths. This will vary on an individual basis. Where
intercept If it is not known and only the down hole lengths are the terrain is challenging the drill pads where moved
lengths reported, there should be a clear statement to this along the line and the drill dip was steepened to
effect (e.g. ‘down hole length, true width not known’). intersect the drill target at depth. In these
circumstances the drill intersection is not
perpendicular to the geological structures or
mineralisation.
Diagrams Appropriate maps and sections (with scales) and See Table 1 and Table 2 and Figure 1, Figure 2, Figure
tabulations of intercepts should be included for any 3 and Figure 4 in the main text.
significant discovery being reported These should
include, but not be limited to a plan view of drill hole
collar locations and
appropriate sectional views.
Balanced Where comprehensive reporting of all Exploration All drill holes assays returned to date from the
reporting Results is not practicable, representative reporting of current drill programme have been reported.
both low and high grades and/or widths should be
practiced to avoid misleading reporting of Exploration
Results.
Other Other exploration data, if meaningful and material, A desktop study was completed by Core Metallurgy
substantive should be reported including (but not limited to): Pty Ltd, using the most recent drill data and
exploration data geological observations; geophysical survey results;
geochemical survey results; bulk samples – size and
method of treatment; metallurgical test results; bulk
density, groundwater, geotechnical and rock
flotation test work results to perform an order-of
magnitude assessment of processing and operating
options for a mine at Mt Flora. The goal of the study
characteristics; potential deleterious or contaminating was to produce indicative flowsheets and the
substances. associated capital and operating costs to
subsequently evaluate the feasibility and economic

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19

Criteria JORC Code explanation JORC Code explanation Commentary Commentary
viability of producing a copper concentrate via
conventional open pit mining and processing
methods from deposits in the Bundarra project
area.
The cost estimates provided within the review are of
a preliminary nature and should have an expected
accuracy range of 25% to 45%. Scoping test work to
assess metallurgical processing options was
conducted by Core in May and June 2019 and these
data were used to constrain the review.
Key assumptions include all mining will be from an
open-pit, throughput rate will be 500,000 tonnes
per annum of sulphide ore, a concentrate grade for
copper of 24% and silver of 398 g/t Ag, concentrate
filter cake delivered to Mt Isa by road transport and
a locally based drive in/out workforce is available at
Mackay or in the surrounding area.
The study considered twelve processing options
with the Base Case capital cost estimate for the
supply and construction of a concentrator with a
nominal capacity of 500,000 dry tonnes per annum
to produce a saleable rougher copper concentrate is
estimated at approximately A$56.3 million.
Order of magnitude operating costs for a greenfield
EPCM and second-hand process plant, at A$31-34
per tonne, were significantly lower compared to
Builder Owner Operator (A$47-51 per tonne) and
Contract Crushing / Direct Shipped Ore (A$65-89 per
tonne) options.
A copper cut-off grade of 0.2% Cu represents the
economic cut-off grade for the project using the
current copper price and cost estimates above.
Further work The nature and scale of planned further work (e.g. Further work will include drilling other prospects
tests for lateral extensions or depth extensions or (Quorn) around the Bundarra Pluton to test results
large-scale step-out drilling). returned from GAIP, MLEM and 3D IP geophysical
Diagrams clearly highlighting the areas of possible surveys and pXRF soil surveys.
extensions, including the main geological
interpretations and future drilling areas, provided this
information is not commercially sensitive.

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