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KINGSTON RESOURCES LIMITED — Capital/Financing Update 2021
May 9, 2021
65206_rns_2021-05-09_6461d43a-e0f8-4ad4-b712-015ec8a7a37a.pdf
Capital/Financing Update
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ASX/Media Announcement 10 May 2021
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Further Gold and High Grade Silver Mineralisation Intersected at Kulumalia
Mineral Resource and Ore Reserve update on-track for delivery in September Quarter
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Resource in-fill drilling at Kulumalia, located at the southern end of the main Umuna orebody, has returned further positive assay results, outside the Reserve pit shell with highlights including:
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GDD101 20.7m @ 2.52g/t Au & 86.1g/t Ag from 99.3m
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GDD104 17.5m @ 2.28g/t Au & 2.5g/t Ag from 221.9m
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GDD104 8m @ 1.39g/t Au & 3.6g/t Ag from 210.2m
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Significant high-grade silver assays returned within and immediately adjacent to the gold mineralisation, enhancing the potential economics of the central Kulumalia area: • GDD101 2m @ 192g/t Ag & 0.68g/t Au from 87m
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GDD101 37.4m @ 90.9g/t Ag & 1.5g/t Au from 91.6m
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Drilling has confirmed and extended mineralised intervals within and below the current life-ofmine plan, increasing confidence in the existing Resource and potentially highlighting additional mineable material in this area of the Umuna Pit.
Kingston Resources Limited (ASX: KSN ) ( Kingston or the Company ) is pleased to report significant new results from ongoing Resource drilling at Kulumalia, located at the southern end of the main Umuna orebody at its flagship 3.6Moz Misima Gold Project in PNG.
Recent drilling has returned multiple wide mineralised intercepts outside of the Reserve pit shell, increasing geological confidence in the existing Resource and Reserve models while also delineating new mineralisation beneath the current life-of-mine plan.
These strong results follow on from previously-reported drill results at Kulumalia (see ASX announcement 8[th] March 2021), which included shallow, high-grade mineralised intercepts. Best intercepts from the previouslyreported results included:
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GDD093 10.7m @ 1.34g/t Au & 8.1g/t Ag from 44m
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14.2m @ 1.61g/t Au & 4.0g/t Ag from 146.8m
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• GDD095 7m @ 1.14g/t Au & 15.7g/t Ag from 54.7m
9.8m @ 0.76g/t Au & 0.4g/t Ag from 170m
3.8m @ 2.42g/t Au & 1.5g/t Ag from 183.8m
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GDD096 9.1m @ 1.6g/t Au & 10.5g/t Ag from 194.9m
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22.4m @ 0.99g/t Au & 27.8g/t Ag from 212m
ASX: KSN Shares on Issue: 284M Market Cap: A$60M Cash: A$13.5M (31 Mar 2021)
201/110 Pacific Hwy, North Sydney, NSW 2060 +61 2 8021 7492 [email protected] www.kingstonresources.com.au
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@KSNResources
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- GDD099 6m @ 1.57g/t Au & 42.3g/t Ag from 119m
The drilling results from Kulumalia are part of an ongoing 8,000m drilling campaign designed to in-fill and upgrade the existing Inferred Resource as well as test depth extensions and confirm historical drill intercepts.
Encouragingly, the results have continued to deliver some particularly high silver grades in the central Kulumalia area, within the current mine plan. These results are expected to enhance the potential economic contribution of mining the Kulumalia area within the Umuna Pit.
Significantly, mineralisation at Kulumalia has also been identified below the current life-of-mine plans but still at relatively shallow depths (see GDD104 in figure 4). These results are encouraging as they point to the potential for additional mineable material in this area of the Umuna Pit, which would have potential positive implications for the economics of the project.
Following completion of the drill program, assay results will feed into an updated Ore Reserve estimate for the Misima Gold Project, which is expected to be delivered during Q3 this year.
Kingston Resources Managing Director, Andrew Corbett, said: “This latest round of assay results at Kulumalia builds on the encouraging results released in March. This area is shaping up to be an important component of Kingston’s development strategy for Misima.
“It is particularly pleasing to see some of the deeper holes drilled at Kulumalia to date returning high-grade mineralised intervals. This shows that gold mineralisation continues at depth in fresh rock and confirms that Kulumalia is more than just a source of shallow oxide ore – it is an extremely well-mineralised component of the main Umuna trend.
“Kingston’s geology team is doing a great job de-risking the project and adding value to the proposed mine production plan, which will ultimately help to strengthen Misima’s credentials as a long-life, low-cost gold operation.”
The drilling at Kulumalia was undertaken within the existing Inferred Resource envelope, with best gold intercepts from the latest results including:
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GDD101 16.8m @ 0.82g/t Au & 16.0g/t Ag from 34m, including
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1m @ 3.63g/t Au & 23.4g/t Ag from 37m; and
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2.4m @ 1.55g/t Au & 31.2g/t Ag from 41.1m.
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GDD101 20.7m @ 2.52g/t Au & 86.1g/t Ag from 99.3m, including
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1m @ 1.62g/t Au & 62.3g/t Ag from 100.5m; and
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1.9m @ 15g/t Au & 22.3g/t Ag from 105m; and
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1m @ 5.24g/t Au & 72.9g/t Ag from 111m.
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GDD102 16m @ 0.61g/t Au & 15.2g/t Ag from 256m.
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GDD104 8m @ 1.39g/t Au & 3.6g/t Ag from 210.2m.
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GDD104 17.5m @ 2.28g/t Au & 2.5g/t Ag from 221.9m, including
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10.8m @ 3.4g/t Au & 2.6g/t Ag from 226.7m;
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Rock units hosting the gold mineralisation at Kulumalia include quartz-chlorite and graphitic schists, greenstone (meta-basalts), feldspar porphyry and diorite and a series of structurally-controlled breccia units, with the breccia units being the preferred host of the mineralisation. The gold mineralisation appears not to be lithologically controlled.
Gold mineralisation is associated with limonite and quartz veinlets and limonitic fractures in the oxide zone and brecciated units with fine sulphides in fresh material. Structures are characterised by a high grade central zone with a halo of lower grade gold mineralisation.
Silver Mineralisation
Silver is a common precious metal associated with carbonate base metal-style mineral systems that characterise the gold-rich mineralisation at Misima. At Kulumalia, high-grade silver mineralisation occurs both coincident with and peripheral to the main gold-rich mineralised structures targeted by the drilling. High silver grades have the potential to improve the economics of mining at Kulumalia due to the silver credits gained offsetting the gold production costs.
Historical silver production by Placer totalled 22.6Moz, at an average of 1.4Mozpa with an average recovery of 52.6%. For the Pre-Feasibility Study (PFS) completed by Kingston (see ASX Announcement 24 November 2020), silver recoveries were conservatively estimated at 35%.
High-grade silver intercepts were calculated independently of gold. A silver cut-off grade of 24g/t was calculated using commodity price assumptions, mining assumptions, operating costs and recoveries as published in the Misima PFS and Resource and Reserve Statement released on 24 November 2020.
Best silver intercepts from the latest results include:
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GDD101 3.4m @ 31.4g/t Ag & 1.32g/t Au from 41.1m
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GDD101 1.3m @ 29.5g/t Ag &0.1g/t Au from 62.6m
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GDD101 2m @ 193g/t Ag & 0.68g/t Au from 87m
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GDD101 37.4m @ 90.9g/t Ag & 1.5g/t Au from 91.6m
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GDD102 1.5m @ 53.4g/t Ag & 0g/t Au from 0m
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GDD102 4m @ 25.2g/t Ag & 0.48g/t Au from 263m
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GDD102 2.8m @ 35.1g/t Ag & 0.44g/t Au from 269.18m
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Figure 1: Kulumalia plan map showing drill hole collars in Resource, Production Target and Reserve pit shells
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Figure 2: Kulumalia section showing new shallow mineralisation
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Figure 3: Kulumalia section showing mineralised intervals in Production Target and Resource pit shells
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Figure 4: Kulumalia section showing mineralised intervals beneath Production Target pit shell
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Figure 5: Regional Misima map showing location of Kulumalia
Next Steps
Drilling of the Cooktown stockpile has now been completed and both drill rigs are moving back to Kulumalia to continue the Resource definition program that builds on the updated geological interpretation to include drill testing of near-surface gold mineralisation in structures in the hanging wall of the main gold-rich zone, strike extensions to the east and west, and in-fill of existing and intermediate sections.
The Resource definition program will be followed by a program of geotechnical drilling in the second half of 2021, which will contribute to the ongoing Definitive Feasibility Study (DFS).
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| Table 1: Drill Hole | Table 1: Drill Hole | Collar Information | Collar Information | ||||
|---|---|---|---|---|---|---|---|
| Hole ID | Easting | Northing | RL | Depth | Dip | Azimuth | Prospect |
| GDD100* | 479805 | 8819917 | 212 | 18.9 | -79 | 10.8 | Kulumalia |
| GDD101 | 479801 | 8819923 | 232 | 208.2 | -79 | 10.8 | Kulumalia |
| GDD102 | 479981 | 8819716 | 256 | 300.6 | -50 | 8 | Kulumalia |
| GDD103 | 480194 | 8819780 | 166 | 253 | -70 | 12.3 | Kulumalia |
| GDD104 | 480126 | 8819791 | 184 | 251.4 | -70 | 14.3 | Kulumalia |
- Hole abandoned and redrilled
Table 2: Table of Significant Intervals*
*maximum internal dilution of 2m, lower cut-off of 0.3g/t Au. This has changed from 0.4g/t Au to reflect the cut-off grade determined by PFS mining studies and the 2020 Umuna Resource of 0.3g/t Au, both of which align with the geostatistical distribution of gold at Umuna
| HOLEID | Incl_te xt |
From | To | Inter val |
Au (ppm) |
Ag (ppm) |
Cu (ppm) |
Pb (ppm) |
Zn (ppm) |
Au COG |
|---|---|---|---|---|---|---|---|---|---|---|
| GDD100 | No Intervals |
|||||||||
| GDD101 | 22.30 | 23.20 | 0.9 | 0.41 | 8.70 | 29 | 104 | 239 | 0.30 | |
| GDD101 | 29.00 | 31.00 | 2 | 0.39 | 5.80 | 86 | 185 | 505 | 0.30 | |
| GDD101 | 34.00 | 50.80 | 16.8 | 0.82 | 16.03 | 104 | 429 | 636 | 0.30 | |
| GDD101 | Incl | 41.10 | 43.50 | 2.4 | 1.55 | 31.21 | 91 | 322 | 619 | 1.00 |
| GDD101 | & | 37.00 | 38.00 | 1 | 3.63 | 23.40 | 230 | 2165 | 730 | 2.50 |
| GDD101 | 81.00 | 89.00 | 8 | 0.35 | 53.80 | 60 | 272 | 984 | 0.30 | |
| GDD101 | 92.30 | 97.00 | 4.7 | 0.33 | 84.39 | 55 | 160 | 1508 | 0.30 | |
| GDD101 | 99.30 | 120.00 | 20.7 | 2.52 | 86.09 | 245 | 1404 | 1558 | 0.30 | |
| GDD101 | Incl | 100.50 | 101.50 | 1 | 1.62 | 62.30 | 87 | 182 | 1534 | 1.00 |
| GDD101 | & | 105.00 | 117.00 | 12 | 3.90 | 87.29 | 324 | 1585 | 1628 | 1.00 |
| GDD101 | Incl | 105.00 | 106.90 | 1.9 | 15.00 | 22.30 | 165 | 584 | 1739 | 2.50 |
| GDD101 | & incl | 111.00 | 112.00 | 1 | 5.24 | 72.90 | 337 | 1082 | 1874 | 2.50 |
| GDD101 | 123.20 | 124.20 | 1 | 0.76 | 312.00 | 177 | 1955 | 1500 | 0.30 | |
| GDD101 | 171.20 | 175.50 | 4.3 | 0.39 | 6.15 | 130 | 928 | 755 | 0.30 | |
| GDD102 | 245.90 | 248.40 | 2.5 | 0.80 | 4.78 | 223 | 1282 | 1024 | 0.30 | |
| GDD102 | 256.00 | 272.00 | 16 | 0.61 | 15.20 | 179 | 370 | 1082 | 0.30 | |
| GDD102 | Incl | 263.00 | 263.90 | 0.9 | 1.01 | 25.80 | 503 | 1106 | 1502 | 1.00 |
| GDD102 | & | 268.00 | 269.18 | 1.18 | 2.34 | 9.10 | 222 | 326 | 1200 | 1.00 |
| GDD102 | 280.00 | 281.00 | 1 | 0.43 | 1.30 | 55 | 361 | 408 | 0.30 | |
| GDD102 | 289.50 | 291.00 | 1.5 | 0.72 | 4.10 | 43 | 905 | 292 | 0.30 | |
| GDD103 | 24.00 | 25.40 | 1.4 | 0.32 | 2.80 | 48 | 15 | 109 | 0.30 | |
| GDD103 | 142.50 | 144.50 | 2 | 0.96 | 2.00 | 63 | 326 | 959 | 0.30 | |
| GDD103 | 168.00 | 169.00 | 1 | 0.65 | 3.50 | 140 | 123 | 407 | 0.30 | |
| GDD103 | 194.00 | 195.00 | 1 | 0.40 | 1.90 | 26 | 120 | 126 | 0.30 | |
| GDD103 | 227.20 | 230.20 | 3 | 0.60 | 2.47 | 93 | 388 | 797 | 0.30 | |
| GDD103 | 236.40 | 238.70 | 2.3 | 0.50 | 0.69 | 33 | 186 | 717 | 0.30 | |
| GDD104 | 51.00 | 52.00 | 1 | 0.39 | 0.80 | 30 | 10 | 106 | 0.30 |
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| 73.50 | 78.70 | 5.2 | 0.52 | 4.11 | 51 | 27 | 231 | 0.30 | |
|---|---|---|---|---|---|---|---|---|---|
| 92.50 | 95.20 | 2.7 | 0.53 | 10.41 | 46 | 113 | 354 | 0.30 | |
| 106.40 | 108.40 | 2 | 0.34 | 4.20 | 76 | 72 | 625 | 0.30 | |
| 114.30 | 114.80 | 0.5 | 0.57 | 1.80 | 135 | 2060 | 1302 | 0.30 | |
| 146.30 | 147.10 | 0.8 | 0.35 | 7.90 | 392 | 554 | 1602 | 0.30 | |
| 183.50 | 189.50 | 6 | 0.46 | 5.38 | 341 | 569 | 1906 | 0.30 | |
| 192.70 | 195.70 | 3 | 0.40 | 2.57 | 339 | 2614 | 997 | 0.30 | |
| 210.20 | 218.20 | 8 | 1.39 | 3.64 | 204 | 1150 | 3655 | 0.30 | |
| Incl | 210.20 | 216.20 | 6 | 1.69 | 4.25 | 236 | 1459 | 4607 | 1.00 |
| Incl | 210.20 | 213.20 | 3 | 2.24 | 3.77 | 203 | 2526 | 3579 | 2.50 |
| 221.90 | 239.40 | 17.5 | 2.28 | 2.46 | 241 | 901 | 1500 | 0.30 | |
| Incl | 226.70 | 237.50 | 10.8 | 3.40 | 2.58 | 342 | 1245 | 1951 | 1.00 |
| Incl | 230.20 | 237.50 | 7.3 | 4.36 | 2.29 | 478 | 1456 | 2264 | 2.50 |
Table 2: Table of Significant Silver Intervals Maximum internal dilution of 2m at 24g/t Ag cut-off; Ag cut-off has been calculated based on a PFS processing costs of A$13.23/t, Ag process recovery range of 35% to 55%, USD$1500/oz Au and USD$25/oz Ag commodity price
| HOLEID | Incl_text | From | To | Interval | Au (ppm) |
Ag (ppm) |
Cu (ppm) |
Pb (ppm) |
Zn (ppm) |
Ag COG |
|---|---|---|---|---|---|---|---|---|---|---|
| GDD100 | ||||||||||
| GDD101 | 15.30 | 15.90 | 0.6 | 0.03 | 28.00 | 70 | 16 | 461 | 24.00 | |
| GDD101 | 26.00 | 27.00 | 1 | 0.22 | 37.80 | 129 | 159 | 381 | 24.00 | |
| GDD101 | 41.10 | 44.50 | 3.4 | 1.32 | 31.38 | 95 | 402 | 648 | 24.00 | |
| GDD101 | 71.00 | 72.30 | 1.3 | 0.11 | 29.50 | 24 | 116 | 681 | 24.00 | |
| GDD101 | 87.00 | 89.00 | 2 | 0.68 | 192.50 | 112 | 181 | 1755 | 24.00 | |
| GDD101 | 91.60 | 129.00 | 37.4 | 1.51 | 90.85 | 204 | 1583 | 1501 | 24.00 | |
| GDD102 | 0.00 | 1.50 | 1.50 | 0.00 | 53.40 | 158 | 8 | 127 | 24.00 | |
| GDD102 | 263 | 267 | 4 | 0.48 | 25.19 | 251 | 745 | 1407 | 24.00 | |
| GDD102 | 269.18 | 272.00 | 2.82 | 0.44 | 35.06 | 165 | 464 | 1388 | 24.00 | |
| GDD103 | No SI | |||||||||
| GDD104 | No SI |
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This release has been authorised by the Kingston Resources Limited Board. For all enquiries please contact Managing Director, Andrew Corbett, on +61 2 8021 7492.
About Kingston Resources
Kingston Resources is a metals exploration company which is focused on exploring and developing the worldclass Misima Gold Project in PNG. Misima hosts a JORC Resource of 3.6Moz Au and an Ore Reserve of 1.35Moz. Misima was operated as a profitable open pit mine by Placer Pacific between 1989 and 2001, producing over 3.7Moz before it was closed when the gold price was below US$300/oz. Kingston has concluded a Pre-Feasibility Study for Misima and is continuing to advance development activities. The Misima Project also offers outstanding potential for additional resource growth through exploration success targeting extensions and additions to the current Resource base. Kingston’s interest in Misima is held through its PNG subsidiary Gallipoli Exploration (PNG) Limited.
In addition, Kingston owns 75% of the high-grade Livingstone Gold Project in Western Australia where active exploration programs are also in progress.
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The Misima Mineral Resource estimate outlined below was released in an ASX announcement on 24 November 2020. Further information relating to the resource is included within the original announcement.
| Resource Category | Cut-off (g/t Au) | Tonnes (Mt) | Gold Grade (g/t Au) | Silver Grade (g/t Ag) | Au (Moz) | Ag (Moz) |
|---|---|---|---|---|---|---|
| Indicated | 0.3 | 68.3 | 0.80 | 4.5 | 1.8 | 9.8 |
| Inferred | 0.3 & 0.8 | 76.1 | 0.76 | 5.9 | 1.9 | 14.4 |
| Total | 0.3 | 144 | 0.78 | 5.2 | 3.6 | 24.2 |
| Reserve | Cut-off (g/t Au) | Tonnes (Mt) | Gold Grade (g/t Au) | Silver Grade (g/t Ag) | Au (Moz) | Ag (Moz) |
| Probable | 0.3 | 48.3 | 0.87 | 4.2 | 1.35 | 6.48 |
Misima JORC 2012 Mineral Resource & Ore Reserve summary table
Competent Persons Statement and Disclaimer
The information in this report that relates to Exploration Results and Mineral Resources is based on information compiled by Mr. Stuart Hayward BAppSc (Geology) MAIG, a Competent Person who is a member of the Australian Institute of Geoscientists. Mr. Hayward is an employee of the Company. Mr. Hayward has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the “Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves”. Mr. Hayward consents to the inclusion in this report of the matters based upon the information in the form and context in which it appears.
The Competent Person signing off on the overall Ore Reserves Estimate is Mr John Wyche BE (Min Hon), of Australian Mine Design and Development Pty Ltd, who is a Fellow of the Australasian Institute of Mining and Metallurgy and who has sufficient relevant experience in operations and consulting for open pit metalliferous mines. Mr Wyche consents to the inclusion in this report of the matters based upon the information in the form and context in which it appears.
Kingston confirms that it is not aware of any new information or data that materially affects the information included in all ASX announcements referenced in this release, and that all material assumptions and technical parameters underpinning the estimates in these announcements continue to apply and have not materially changed.
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ASX/Media Announcement 10 May 2021
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- JORC CODE 2012 EDITION, TABLE 1 Umuna Gold Deposit, Misima Island
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
| Criteria | JORC Code explanation | Commentary | ||
|---|---|---|---|---|
| Sampling techniques | • Nature and quality of sampling (e.g. cut channels, random | • |
The project was historically sampled by Misima Mines Pty Ltd (Placer) between | |
| chips, or specific specialised industry standard measurement | 1998-2000 using HQ, PQ and NQ triple tube diamond drill holes (DD) | |||
| tools appropriate to the minerals under investigation, such as | • |
Kingston are completing an exploration and resource definition drilling program | ||
| down hole gamma sondes, or handheld XRF instruments, | in 2020-2021 to test geological continuity and resource extensions at Kulumalia | |||
| etc.). These examples should not be taken as limiting the | • |
Kingston (2020-2021): | ||
| broad meaning of sampling. | • | DD samples were logged, photographed, and marked up in lithological and | ||
| • Include reference to measures taken to ensure sample | structural units and sampled in 0.5 to 2.0m lengths. | |||
| representivity and the appropriate calibration of any | • | Drill core is logged and sample intervals selected based on lithology, | ||
| measurement tools or systems used. | alteration, structure, mineralisation style, and oxidation state. Non | |||
| • Aspects of the determination of mineralisation that are Material | mineralised material is sampled to a minimum of 1.0m, and maximum 2.0m | |||
| to the Public Report. | length along the core axis. Intervals assessed as potentially mineralised | |||
| • In cases where ‘industry standard’ work has been done this | are sampled to a minimum 0.5m and maximum 1.0m axial length. | |||
| would be relatively simple (e.g. ‘reverse circulation drilling was | • | Drill core sample intervals are marked up and core is cut in half using | ||
| used to obtain 1 m samples from which 3 kg was pulverised to | diamond blade core saw. Half core samples are placed in calico bags and | |||
| produce a 30 g charge for fire assay’). In other cases more | remaining half returned to the core tray for storage. | |||
| explanation may be required, such as where there is coarse | • | Drill core geochemical analysis are carried out at Intertek Lae | ||
| gold that has inherent sampling problems. Unusual |
• | Samples are transported to Intertek in Lae where they are dried and | ||
| commodities or mineralisation types (e.g. submarine nodules) | crushed to 95% passing 3mm. The crushed sample is then pulverised and | |||
| may warrant disclosure of detailed information. | a 50g charge is taken for gold analysis by fire assay by method FA50-AA. | |||
| • | A 100g pulp from each sample is flown to Townsville where they are | |||
| analysed using Intertek’s Four Acid 33 Element package. An optical | ||||
| emission spectroscopy (OES) finish (4A/OE33) is provided for Ag, Pb, Zn | ||||
| and Cu values that report over-range assays. | ||||
| Drilling techniques | • Drill type (e.g. core, reverse circulation, open-hole hammer, | • |
Kingston drilling is 100% triple tube diamond drill core in either PQ3 and HQ3 | |
| rotary air blast, auger, Bangka, sonic, etc.) and details (e.g. | core size. PQ3 is used at the top of hole to ensure high recovery rates in oxide | |||
| core diameter, triple or standard tube, depth of diamond tails, | and transitional oxide zones. | |||
| face-sampling bit or other type, whether core is oriented and if |
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| Criteria | JORC Code explanation | Commentary | |
|---|---|---|---|
| so, by what method, etc.). | • | All Kingston holes are orientated using the Reflex ACTIII tool on every core run | |
| in both PQ3 and HQ3, maximising the opportunity for orientated structure data | |||
| whenground conditions allow. | |||
| Drill sample recovery | • Method of recording and assessing core and chip sample | • |
Kingston (2019-2020) |
| recoveries and results assessed. | • Core recovery is measured as the difference between core recovered in a |
||
| • Measures taken to maximise sample recovery and ensure | drill run and the down-hole run shown on the driller’s core blocks. | ||
| representative nature of the samples. | • The driller modifies drilling pressure and drilling fluid mix to optimise core |
||
| • Whether a relationship exists between sample recovery and | recovery as much as possible, particularly in areas of softer lithologies. | ||
| grade and whether sample bias may have occurred due to | • |
Core recovery is also determined at the core shed as a cross reference with | |
| preferential loss/gain of fine/coarse material. | data recorded in digital format and stored in acQuire database. | ||
| Logging | • Whether core and chip samples have been geologically and | • |
All drill core has been logged to an industry standard and the logging is |
| geotechnically logged to a level of detail to support appropriate | appropriate to support resource estimation. | ||
| Mineral Resource estimation, mining studies and metallurgical | • |
Diamond core has been qualitatively logged for lithology, size, colour, texture, | |
| studies. | alteration, structure, weathering, and a mixture of qualitative and quantitatively | ||
| • Whether logging is qualitative or quantitative in nature. Core | logged for mineralisation, structure orientation, geotechnical and veining. RC | ||
| (or costean, channel, etc.) photography. | chips were qualitatively logged for colour, weathering, lithology, alteration and | ||
| • The total length and percentage of the relevant intersections | mineralisation quantitatively logged. Magnetic susceptibility was logged for all | ||
| logged. | drill holes. All core was photographed wet and dry. Digital photography is | ||
| available for DD core. | |||
| • | Logging data is captured in a digital data capture system (OCRIS) to ensure | ||
| data validation and application of standardised work flow and coding. | |||
| Sub-sampling | • If core, whether cut or sawn and whether quarter, half or all | • |
PQ3 and HQ3 core is cut as half core. The orientation line is used as a cutting |
| techniques and sample | core taken. | guide to ensure consistency in sampling. | |
| preparation | • If non-core, whether riffled, tube sampled, rotary split, etc. and | • |
The sampling interval and technique is considered appropriate for the style of |
| whether sampled wet or dry. | mineralisation and is consistent with the techniques used by Misima Mines Ltd | ||
| • For all sample types, the nature, quality and appropriateness | (Placer) and WCB during previous exploration and mining of the project. | ||
| of the sample preparation technique. | • | The sample size is appropriate to the observed mineralisation style and | |
| • Quality control procedures adopted for all sub-sampling stages | historical geostatistical distribution of gold values. | ||
| to maximise representivity of samples. | • | Duplicate samples of primary crush material (<2mm) are collected during | |
| • Measures taken to ensure that the sampling is representative | sample preparation at the laboratory. | ||
| of the in situ material collected, including for instance results | • |
Diameter of core sizes employed are considered appropriate to the grain size | |
| for field duplicate/second-half sampling. | of the gold and in line with general industry practice for epithermal style gold | ||
| • Whether sample sizes are appropriate to thegrain size of the | deposits. Laboratory primarycrush duplicates were routinelychecked to |
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| Criteria | JORC Code explanation | Commentary | ||
|---|---|---|---|---|
| material being sampled. | ensure that they reported within acceptable limits. Sample preparation for all | |||
| samples followed Placer standard methodologies and modified and updated | ||||
| by Kingston where appropriate. | ||||
| • | ||||
| Quality of assay data | • The nature, quality and appropriateness of the assaying and | • |
All assay techniques are appropriate. The technique is total. | |
| and laboratory tests | laboratory procedures used and whether the technique is | • |
No geophysical tools were used to determine any element concentrations. | |
| considered partial or total. | Grind size checks were performed by the labs and reported as part of their due | |||
| • For geophysical tools, spectrometers, |
handheld XRF |
diligence. | ||
| instruments, etc., the parameters used in | determining the | • |
Standard reference materials are inserted at a frequency of one per 20 | |
| analysis including instrument make and model, reading times, | samples. | |||
| calibrations factors applied and their derivation, etc. | • | Laboratory duplicates as primary crush samples were inserted at a frequency | ||
| • Nature of quality control procedures adopted (e.g. standards, | of one per 20 samples. | |||
| blanks, duplicates, external laboratory checks) and whether | • |
Blanks are inserted at a frequency of one per 50 samples. | ||
| acceptable levels of accuracy (i.e. lack of bias) and precision | • |
For smaller batches, additional reference materials are inserted to ensure | ||
| have been established. | adequate QAQC control. | |||
| • | QA/QC performance is tracked using acQuire database software. | |||
| • | Acceptable levels of accuracy have been achieved using these techniques. | |||
| • | Intertek conducts periodic laboratory QA/QC including sizing tests and | |||
| crushate / pulp duplicate tests. Laboratory QA/QC also shows acceptable | ||||
| levels of accuracy. | ||||
| Verification of | • The verification of significant intersections by either | • |
All Data, data entry procedures, data verification and data storage has been | |
| sampling and assaying | independent or alternative company personnel. | carried out in accordance with Kingston SOPS. Historical Placer records are | ||
| • The use of twinned holes. | currently stored at a facility in Townsville whilst WCB records have been | |||
| • Documentation of primary data, data entry procedures, data | transferred to KSN. Digital records are stored in various electronic formats. | |||
| verification, data storage (physical and electronic) protocols. | • | No independent data verification procedures haven been undertaken to date | ||
| • Discuss any adjustment to assay data. | undertaken other than the QA/QC mentioned above due to early stage of the | |||
| program. | ||||
| • | No twinned drill holes have been completed thus far. | |||
| • | Primary data is recorded on site digitally using an OCRIS digital data capture | |||
| tool. Data is exported to a standard format and transferred to Perth for loading | ||||
| into an acQuire database. Assay data is provided digitally as CSV and PDF | ||||
| files. |
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| Criteria | JORC Code explanation | Commentary | ||
|---|---|---|---|---|
| • | OCRIS logger facilitates data capture in a standardised work flow, data | |||
| structure with embedded data codes ensuring data validation at point of data | ||||
| entry. | ||||
| Location of data | • | Accuracy and quality of surveys used to locate drill holes | • |
Drill hole collars are preliminary within the accuracy of a handheld GPS. +/-3- |
| points | (collar and down-hole surveys), trenches, mine workings and | 5m in X-Y-Z. | ||
| other locations used in Mineral Resource estimation. | • | Down hole surveying was conducted with a collar setup check survey at | ||
| • | Specification of the grid system used. | 15metres down hole, and on intervals approximating every 30 metres as the | ||
| • | Quality and adequacy of topographic control. | hole is advanced using Reflex downhole survey equipment. Downhole surveys | ||
| and hole path are reviewed and surveys identified as being or potentially being | ||||
| in error, repeated as the hole is drilled. | ||||
| • | All spatial data sets and the 2020 resource estimate are located with respect | |||
| to GDA94 datum (Zone 56). | ||||
| • | Historical data is provided in either GDA94, AGD66, Truncated AGD or Placer | |||
| local mine grid. | ||||
| Topographic control was checked during 2015 by a new topographic | ||||
| survey conducted by WCB. | ||||
| Kingston converted all historical spatial data sets to GDA94 Zone 56 | ||||
| using a 2-point planar conversion derived from a detailed land survey | ||||
| and rigorous review of geographic and spatial data sets against | ||||
| LiDAR topography and resurvey of relocated collars. All data | ||||
| translations are checked and verified at the time. The location of | ||||
| spatial data sets has been assessed as appropriate and logical with | ||||
| respect to the 3D topography and logical geographic features such | ||||
| as flat drill pads. | ||||
| • | AMC during the 2015 report reviewed the control with drill hole collars and end | |||
| of mine surveys and found it was sufficient to support measured or indicated | ||||
| mineral resource estimates. An as-mined surface to deplete the resource was | ||||
| created from blast-hole collars. | ||||
| • | All Kingston 2019-2020 drill holes have been surveyed by PNG Land Surveys | |||
| using high accuracy RTK GPS in PNG94 zone 56, with XYZ locations updated | ||||
| in the database. PNG94 is the same datum as GDA94. PNG Land surveys will | ||||
| pickup drill collars on a campaign basis as access to the project allows. |
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| Criteria | JORC Code explanation | Commentary | |
|---|---|---|---|
| Data spacing and | • Data spacing for reporting of Exploration Results. | • | Drill hole spacing is approximately 50m by 50m with downhole sampling |
| distribution | • Whether the data spacing and distribution is sufficient to | predominantly at 1 to 2m intervals. There are areas that have a 25m x 25m drill | |
| establish the degree of geological and grade continuity | hole spacing. Most of the Placer RC and diamond holes were angled holes at | ||
| appropriate for the Mineral Resource and Ore Reserve | a variety of dips and orientation, predominantly normal to a structure of interest. | ||
| estimation procedure(s) and classifications applied. | Some historical and recent drilling was vertical until orientation of target | ||
| • Whether sample compositing has been applied. | structures were well known. | ||
| • | The geological uncertainty associated with interpretation at Kulumalia is being | ||
| assessed as the geology interpretation and model evolves. | |||
| • | For the size of the deposit and expected mining block (and historical mining | ||
| block), the spacing gives good coverage of the mineralised zone and at a | |||
| suitable spacingto estimate blocks. | |||
| Orientation of data in | • Whether the orientation of sampling achieves unbiased | • |
Review of historical data from mine bench maps and reports, combined with |
| relation to geological | sampling of possible structures and the extent to which this is | orientated drill core data, concludes that the Kingston drill holes are orientated | |
| structure | known, considering the deposit type. | to minimise sampling bias. | |
| • If the relationship between the drilling orientation and the | • |
Historical drilling by Placer comprised a number of vertical holes and angled | |
| orientation of key mineralised structures is considered to have | holes that are interpreted to have tested the steep dipping mineralisation. The | ||
| introduced a sampling bias, this should be assessed and | evolving geology interpretation will provide feedback with respect to potential | ||
| reported if material. | bias of drilling direction. | ||
| • | It is assessed that an adequate number of angled holes have and will be drilled | ||
| into the Kulumalia structures/deposit to minimise this risk. | |||
| Sample security | • The measures taken to ensure sample security. | • | Kingston samples are placed in large polyweave bags that are sealed with |
| either a plastic zip tie or wire twist fastener. The contents of each bag and | |||
| makeup of each batch is recorded in a ledger and digital and hard copy sample | |||
| submission forms. Samples are submitted by air or sea freight from Misima to | |||
| Lae and collected from Nadzab airport or Lae shipping wharf by Intertek staff. | |||
| Samples are tracked via regular inspections and checks/counts along the | |||
| logistics management chain. Sample submission forms and master sample | |||
| register are used to track samples by batch submitted. Intertek provide sample | |||
| receipt notices once received and checked in Lae. There were no other specific | |||
| sample security protocols inplace. | |||
| Audits or reviews | • The results of any audits or reviews of sampling techniques | • |
Historical and Placer: |
| and data. | • Skandus (2017), has reviewed sampling memos and a report by Pitard that |
||
| audited and reviewed the Placer sampling in 1990. Pitard identified some |
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| Criteria | JORC Code explanation | Commentary | ||
|---|---|---|---|---|
| issues and made recommendations to improve sampling, most of the | ||||
| drilling at Ewatinona was completed after this review. Documentation | ||||
| shows that these recommendations where put into practise by Placer. | ||||
| WCB sampling and data was reviewed by AMC during a 2013 technical | ||||
| report. AMC found that the core handling, logging and sampling was | ||||
| carried out to industry standards. Kingston has continued and improved | ||||
| the process and procedures where applicable as part of continuous | ||||
| improvement programs. | ||||
| • | • | No new audits and reviews have been completed for this resource estimation. |
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section).
| Criteria | JORC Code explanation | Commentary | |
|---|---|---|---|
| Mineral tenement and | • Type, reference name/number, location and ownership | • |
Misima Island is part of the Louisiade Archipelago within Milne Bay Province of |
| land tenure status | including agreements or material issues with third parties such | PNG. It is situated in the Solomon Sea about 625 km east of Port Moresby, the | |
| as joint ventures, partnerships, overriding royalties, native title | capital of PNG. The site is located at an approximate latitude of 10° 40’ South | ||
| interests, historical sites, wilderness or national park and | and longitude of 152° 47’ E. | ||
| environmental settings. | • | The Property is located on the eastern portion of the island and includes the | |
| • The security of the tenure held at the time of reporting along | historic mining areas of Umuna and Quartz Mountain. There are no known | ||
| with any known impediments to obtaining a licence to operate | impediments. | ||
| in the area. | • | The Property consists of a single Exploration Licence, (EL) 1747, comprising | |
| 53 sub blocks, covering a total area of 180 km2. This EL is valid up until the 20th | |||
| March 2021. A two-year renewal has been applied for prior to this date, in line | |||
| with Mineral resources Authority (MRA) PNG tenement and statutory | |||
| requirements. All conditions pertaining to compliance of the title have been met. | |||
| • | Kingston and its subsidiary WCB Pacific Pty Ltd are in a JV with Pan Pacific | ||
| Copper Ltd, Gallipoli Exploration (PNG) Pty Ltd, a subsidiary of WCB Pacific | |||
| Pty Ltd, is the legal entity and tenement holder and is responsible for performing | |||
| its obligations under the MiningAct 1992. |
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Exploration done by other parties
-
Acknowledgment and appraisal of exploration by other parties.
-
1958–1964 Oceanic Mineral Development Pty Ltd, taken over by Pacific Island Mines (PIM) - Diamond drilling / adit development.
-
1964–1967 Oceanic/Cultus Joint Venture (JV) - Trenching, diamond drilling 5 holes for 1,383m in 1965, IP survey, U/G sampling new adit, steam sediment sampling.
-
1967 CRA Exploration Pty Ltd (CRAE) - Stream sediment sampling at point of entry of all rivers and streams into the ocean.
-
1967–1969 PIM/Cultus Joint Venture (JV) - Stream sediment sampling over whole island, ridge and spur soil sampling, percussion drilling, diamond drilling.
-
1969–1972 Noranda/PIM/Cultus JV - Noranda was operator diamond drilling 15 holes for 3,568 m at Mount Sisa copper anomaly, minor trenching at Umuna
-
1973 Claims not renewed. No work carried out.
-
1975–1976 Meneses Explorations Pty Ltd - Grid Mapping, Sampling of old trenches.
-
1977–1987 Placer/Meneses - JV, Placer was operator. Deep trenching, and channel sampling, mapping, RC and diamond drilling.
-
1978– 1985 CRAE - Also in JV, withdrew in 1985.
-
1982 - Meneses bought out of JV.
-
1987 - Placer forms Placer, Government of PNG becomes 20% shareholder Mining development agreement signed.
-
2012 Barrick Gold - Relinquishment of Mining Lease (SML 1)
-
2012 – 2017 WCB Resource Ltd - Collection and collation of sampling information, historical documentation, sourcing and reconciling production blast hole data to drilled data and 2015 resource estimate, topographic surveys to tie in topographic control, water levels, as mined surfaces and collar locations, converting Geolog drill hole data into a modern format, and carrying out QA/QC on the data and conversion with checking against analogue documents and photographs. Reviews of historical assay QA/QC. Work on validating and verifying historical data so it could be reliably used in a modern code compliant context. Compiling of historical information into NAT-INST 43-101 format for modern reporting. 3,669 auger ridge and spur soil samples, helimagnetic aeromagnetic survey with processing and interpretation (2,035 line kms of survey), 658 channel samples and geological mapping, analysis of structural measurements, comparative analysis of WCB channel sampling and Placer
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- channel sampling to confirm validity of Placer data and drilling of 5 diamond holes into the Mt Sisa area.
-
2018-2020 Kingston Resources Limited: Focused exploration on Umuna, Umuna East, Misima North, and Quartz Mountain project areas. Building on compilation work by WCB, Kingston completed field mapping and sampling (rock chips, channels, auger) developing drilling targets. Kulumalia is the south eastern extent of the Umuna Deposit with work completed by Kingston focused on increasing confidence in surface and subsurface geology as a key input to a mineral resource estimation.
-
Geology • Deposit type, geological setting and style of mineralisation.
| 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: | ||
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 |
| mineral resource estimation. | ||||
|---|---|---|---|---|
| • | Misima Island forms part of the Louisiade Archipelago which is | a continuation | ||
| of the Papuan Fold Belt of the Papuan Peninsula offshore eastwards through | ||||
| the Papuan Plateau. The oldest rocks on Misima are Cretaceous to Paleogene | ||||
| metamorphic rocks, which can be subdivided into the western Awaibi | ||||
| Association and the younger overthrust eastern Sisa Association that is host to | ||||
| the gold and copper mineralization. The two associations are separated by an | ||||
| original thrust fault with later extensional activation. | ||||
| • | Mineralisation deposit style on Misima Island is best described as | Low | ||
| Sulphidation Epithermal due to the veining and characteristics, the dominance | ||||
| of Ag Zn Pb Au Cu Mn geochemistry as well as complex alteration styles and | ||||
| geometry, and strong association with precursor porphyry Cu Au style alteration. | ||||
| • | Styles of mineralisation observed across Misima Island include multiphase | |||
| hydrothermal breccia, stockworks both sheeted and three-dimensional, skarn, | ||||
| jasperoidal replacement, and poorly banded vein infill of quartz | and carbonate | |||
| with associated pyrite, galena, sphalerite, barite and minor tetrahedrite. | ||||
| Combining all data sets with orientated drill core data for | ||||
| mineralised veins and breccias defines the predominant structure | ||||
| trends in the deposit and will provide the foundation for the | ||||
| resource model. The Current interpretation is that Kulumalia | ||||
| mineralisation is open along strike and at depth, with the potential | ||||
| for hangingwall splays and mineralised structures. | ||||
| Table of Collars | ||||
| Hole ID Easting Northing RL Depth Dip Azimuth |
Prospect | |||
| GDD092 479740 8819887 211 29.6 -69.0 013.8 |
Kulumalia | |||
| GDD093 479736 8819891 217 272.7 -70.0 010.8 |
Kulumalia | |||
| GDD094* 479737 8819875 217 29.1 -81.0 013.8 |
Kulumalia |
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- _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.
-
Data aggregation • In reporting Exploration Results, weighting averaging methods techniques, maximum and/or minimum grade truncations (e.g. 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 clearly stated.
| GDD095 | 479737 | 8819887 | 217 | 305 | -81.0 | 011.3 | Kulumalia |
|---|---|---|---|---|---|---|---|
| GDD096 | 479878 | 8819836 | 295 | 291.2 | -73.0 | 010.8 | Kulumalia |
| GDD097* | 479704 | 8819909 | 221 | 8.8 | 79.5 | 008.3 | Kulumalia |
| GDD098 | 479704 | 8819911 | 221 | 280.2 | -79.5 | 008.3 | Kulumalia |
| GDD099 | 479878 | 8819836 | 295 | 228.6 | -83.0 | 010.8 | Kulumalia |
No new drill hole data has been excluded.
-
Significant intervals are calculated based on length weighted grade with maximum internal dilution of 2m at a cut-off of 0.3g/t Au.
-
Gold cut off for reporting significant intervals has reduced from 0.4g/t Au to 0.3g/t Au to reflect the potentially feasible mineable gold cut-off grade determined by PFS mining studies, and the 2020 Umuna Resource of 0.3g/t Au, both of which align with the geostatistical distribution of gold at Umuna.
-
See table 2 of release
-
- Reporting of Silver mineralised intercepts is made at a maximum internal dilution of 2m at 24g/t Ag cut-off using commodity price assumptions, mining assumptions, operating costs and recoveries as published in the Misima Prefeasibility and Resource and Reserve Statement released on 24 November 2020.
-
Ag cut-off has been calculated based on a PFS processing costs of A$13.23/t, Ag process recovery range of 35% to 55%, USD$1500/oz Au and USD$25/oz Ag commodity price.
-
Relationship between • These relationships are particularly important in the reporting • mineralisation widths of Exploration Results. and intercept lengths • 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 (e.g. ‘down hole length, true width not known’).
-
Drill holes are orientated to intersect interpreted mineralised structures as close to normal as possible. Angle of incidence is determined by physical location of the drill pads in steep terrain and restrictions in impacting the local community. True width of structures and mineralisation is still being determined by this drilling program and true widths are not reported. Structure true width across Umuna is highly variable.
-
Diagrams • Appropriate maps and sections (with scales) and tabulations • See release. 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.
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| Balanced reporting | • Where comprehensive reporting of all Exploration Results is | • | See release. | |
|---|---|---|---|---|
| not practicable, representative reporting of both low and high | ||||
| grades and/or widths should be practiced to avoid misleading | ||||
| reporting of Exploration Results. | ||||
| Other substantive | • Other exploration data, if meaningful and material, should be | • | No additional substantive data collected and analysed to date. | |
| exploration data | 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. | ||||
| Further work | • The nature and scale of planned further work (e.g. tests for | • | Diamond drilling is planned to continue at Kulumalia testing down dip and strike | |
| lateral extensions or depth extensions or large-scale step-out | extensions of interpreted structures, and geological continuity within and | |||
| drilling). | between drill sections. | |||
| • Diagrams clearly highlighting the areas of possible extensions, | • | The drilling program scope and design will be modified as required, as and when | ||
| including the main geological interpretations and future drilling | new analytical data becomes available and geological interpretation is | |||
| areas, provided this information is not commercially sensitive. | completed to ensure drilling coverage is suitable to support Resource | |||
| Estimation and classification. |
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