Ivanhoe Mines reports Independent Mineral Resource estimate
January 27, 2016
Ivanhoe Mines reports Independent Mineral Resource estimate for its historic Kipushi Mine in the Democratic Republic of Congo
Big Zinc Zone estimated to contain Measured and Indicated Mineral Resources of 10.2 million tonnes at 34.89% zinc, containing 7.8 billion pounds of zinc
In addition, adjacent zones contain copper-rich Measured and Indicated Mineral Resources of 1.6 million tonnes at 4.01% copper, containing 144 million pounds of copper
KIPUSHI, DEMOCRATIC REPUBLIC OF CONGO — Robert Friedland, Executive Chairman of Ivanhoe Mines (TSX: IVN), and Lars-Eric Johansson, Chief Executive Officer, today announced the receipt of a new, independent, Mineral Resource estimate for the company’s historic, high-grade, Kipushi zinc-copper-germanium-lead-silver mine. Kipushi is a joint venture between Ivanhoe Mines and Gécamines, the state- owned mining company.
Highlights of this initial estimate, prepared by the MSA Group, of Johannesburg, South Africa, in compliance with CIM definition standards, are:
- Measured and Indicated Mineral Resources in the Big Zinc Zone of 10.2 million
tonnes at grades of 34.89% zinc, 0.65% copper, 19 grams per tonne (g/t) silver and 51 g/t germanium, at a 7% zinc cut-off, containing an estimated 7.8 billion pounds of zinc.
- The zinc grade of Kipushi’s Measured and Indicated Mineral Resources in the Big
Zinc Zone is more than twice as high as the world’s next-highest-grade zinc project, independently ranked by Wood Mackenzie, an international industry research and consulting group, based on contained zinc (Figure 1).
- Zinc-rich Inferred Mineral Resources total an additional 1.9 million tonnes at grades
of 28.24% zinc, 1.18% copper, 10 g/t silver and 53 g/t germanium. The Inferred Mineral Resources are contained partially in the Big Zinc Zone and partially in the Southern Zinc Zone.
- Kipushi’s copper-rich Measured and Indicated Mineral Resources contained in the
adjacent Fault Zone, Fault Zone Splay and Série Récurrente Zone total an additional 1.63 million tonnes at grades of 4.01% copper, 2.87% zinc and 22 g/t silver, at a 1.5% copper cut-off, containing 144 million pounds of copper. Copper-rich Inferred Mineral Resources in these zones total an additional 1.64 million tonnes at grades of 3.30% copper, 6.97% zinc and 19 g/t silver.
- Ivanhoe’s exploration program has demonstrated that zinc and copper
mineralization of the Kipushi system remains open laterally and at depth. Results recently received from hole KPU081, drilled on section line 6S, confirm high- grade copper-zinc mineralization at depth. KPU081 intersected 60.5 metres (21.7 metres true thickness) grading 2.6% copper, 36.2% zinc, 19 g/t silver and 204 g/t germanium to a depth of 1,763 metres. Included in this interval was an intersection from 580.9 metres to 591.3 metres (3.8 metres true thickness) grading 56.3% zinc, 0.5% copper, 12 g/t silver and 397 g/t germanium.
“This independent estimate of Kipushi’s Mineral Resources has exceeded our expectations. We are convinced that significant additional Mineral Resources can be delineated at Kipushi,” said Mr. Friedland.
“With a current resource now established, we are evaluating technical and infrastructure options to best advance the project. The exceptionally high grades that consistently are being discovered at Kipushi are unique in the international mining industry and provide further confirmation that this project has the potential to benefit the people of the Democratic Republic of Congo for decades to come when it returns to production.”
The Kipushi Mine is on the Central African Copperbelt in the Democratic Republic of Congo’s (DRC) southern Haut-Katanga province, one of Africa’s major mining hubs. The mine, which began operations in 1924, is located approximately 30 kilometres southwest of the provincial capital, Lubumbashi, and less than one kilometre from the DRC-Zambia border. Ivanhoe holds a 68% interest in Kipushi and the state-owned mining company, Gécamines, holds the remaining 32% interest.
The mineralization at Kipushi comprises sulphide replacement bodies within the Kakontwe Sub-Group dolomites and Série Récurrente Sub-Group dolomitic shales of the Nguba Group. Two zones of zinc-rich mineralization occur (the Big Zinc Zone and the Southern Zinc Zone) adjacent to the copper-rich Fault Zone mineralization. The Fault Zone strikes north-northeast to south-southwest and dips approximately 70° to the west. The Big Zinc forms an irregular, steeply-dipping pipe-like body in the immediate footwall to the Fault Zone, the Southern Zinc runs along the footwall of the Fault Zone between -1,150-metre and -1,300-metre levels. A second zone of copper-rich mineralization occurs in the Série Récurrente, which strikes from east to west, is sub-vertical and plunges steeply to the west. Where the Fault Zone and Série Récurrente meet, mineralization tends to be enhanced in a sub-zone known as the Nord Riche. A sub-vertical, copper-zinc-germanium-rich sulphide zone occurs as a splay from the Fault Zone at depth toward the southwest, and has been named the Fault Zone Splay.
Significant concentrations of lead, silver, cobalt and germanium occur in variable amounts in all zones.
Germanium is a high-tech metal used in light-emitting diodes (LED), fibre-optic networks, infrared night vision systems and solar cell applications. The metal currently is trading at approximately US$1,200 a kilogram.
The new Mineral Resource estimate was prepared in accordance with the 2014 CIM definition standards, incorporated by reference into Canadian National Instrument 43-101 – Standards of Disclosure for Mineral Projects. Ivanhoe is preparing a NI 43-101-compliant Preliminary Economic Assessment for Kipushi.
The MSA Mineral Resource estimate was based on the results of 84 drill holes completed at Kipushi by Ivanhoe Mines and an additional 107 historical holes drilled by Gécamines. Mineral Resource estimates were completed below the -1,150-metre-level on the Big Zinc Zone, Southern Zinc Zone, Fault Zone and Série Récurrente Zone. The Mineral Resources were categorized either as zinc-rich resources or copper-rich resources, depending on the most abundant metal. The Big Zinc and Southern Zinc zones have been tabulated using zinc cutoffs and are shown in Table 1; the Fault Zone, the Fault Zone Splay and Série Récurrente Zone have been tabulated using copper cut-offs and are shown in Table 2.
For the zinc-rich zones, the Mineral Resource is reported at a base-case cut-off grade of 7.0% zinc and the copper-rich zones at a base-case cut-off grade of 1.5% copper. Given the considerable revenue that could be obtained from the additional metals in each zone, MSA considers that mineralization at these cut-off grades will satisfy reasonable prospects for economic extraction.
Figure 1: Top 20 zinc projects by contained zinc.
Source: Wood Mackenzie. Note: All tonnes and metal grades of individual metals used in the equivalency calculation of the above mentioned projects (except for Kipushi) are based on public disclosure and have been compiled by Wood Mackenzie. All metal grades have been converted by Wood Mackenzie to a zinc equivalent grade at price assumptions of US$1.01/lb zinc, US$2.86/lb copper, US$0.91/lb lead, US$12.37/lb cobalt, US$1,201/oz gold, US$17/oz silver and US$2,000/kg germanium.
| Table 1: Kipushi Zinc-Rich Mineral Resource at 7% Zn Cut-Off Grade, 23 January 2016 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Tonnes | Zn | Cu | Pb | Ag | Co | Ge | |||
| Zone | Category | ||||||||
| (Millions) | % | % | % | g/t | ppm | g/t | |||
| Measured | 3.59 | 38.39 | 0.67 | 0.36 | 18 | 17 | 54 | ||
| Big Zinc | Indicated | 6.60 | 32.99 | 0.63 | 1.29 | 20 | 14 | 50 | |
| Inferred | 0.98 | 36.96 | 0.79 | 0.14 | 7 | 16 | 62 | ||
| Indicated | 0.00 | - | - | - | - | - | - | ||
| Southern | |||||||||
| Zinc Zone | |||||||||
| Inferred | 0.89 | 18.70 | 1.61 | 1.70 | 13 | 15 | 43 | ||
| Measured | 3.59 | 38.39 | 0.67 | 0.36 | 18 | 17 | 54 | ||
| Indicated | 6.60 | 32.99 | 0.63 | 1.29 | 20 | 14 | 50 | ||
| Total | |||||||||
| Measured | |||||||||
| 10.18 | 34.89 | 0.65 | 0.96 | 19 | 15 | 51 | |||
| & Indicated | |||||||||
| Inferred | 1.87 | 28.24 | 1.18 | 0.88 | 10 | 15 | 53 | ||
| Contained Metal Quantities | |||||||||
| Zn | Cu | Pb | Ag | Co | Ge | ||||
| Tonnes | |||||||||
| Zone | Category | Pounds | Pounds | Pounds | Ounces | Pounds | Ounces | ||
| (Millions) | (Millions) | (Millions) | (Millions) | (Millions) | (Millions) | (Millions) | |||
| Big Zinc | Measured | 3.59 | 3035.8 | 53.1 | 28.7 | 2.08 | 0.13 | 6.18 | |
| Indicated | 6.60 | 4797.4 | 91.9 | 187.7 | 4.15 | 0.20 | 10.54 | ||
| Inferred | 0.98 | 797.2 | 17.1 | 3.0 | 0.23 | 0.03 | 1.96 | ||
| Indicated | 0.00 | 0.0 | 0.0 | 0.0 | 0.00 | 0.00 | 0.00 | ||
| Southern | |||||||||
| Zinc Zone | |||||||||
| Inferred | 0.89 | 368.6 | 31.8 | 33.5 | 0.38 | 0.03 | 1.23 | ||
| Measured | 3.59 | 3035.8 | 53.1 | 28.7 | 2.08 | 0.13 | 6.18 | ||
| Indicated | 6.60 | 4797.4 | 91.9 | 187.7 | 4.15 | 0.20 | 10.54 | ||
| Total | |||||||||
| Measured | |||||||||
| 10.18 | 7833.3 | 144.9 | 216.4 | 6.22 | 0.33 | 16.71 | |||
| & Indicated | |||||||||
| Inferred | 1.87 | 1168.7 | 49.6 | 36.8 | 0.61 | 0.06 | 3.21 |
Notes:
1. All tabulated data has been rounded and as a result minor computational errors may occur.
2. Mineral Resources which are not Mineral Reserves have no demonstrated economic viability.
3. The Mineral Resource is reported as the total in-situ Mineral Resource.
5. The cut-off grade calculation was based on the following assumptions: zinc price of 1.02 USD/lb, mining cost of 50 USD/tonne, processing cost of 10 USD/tonne, G&A and holding cost of 10 USD/tonne, transport of 55% Zn concentrate at 375 USD/tonne, 90% zinc recovery and 85% payable zinc.
| Table 2: Kipushi Copper-Rich Mineral Resource at 1.5% Cu Cut-Off Grade, 23 January 2016 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Tonnes | Cu | Zn | Pb | Ag | Co | Ge | |||
| Zone | Category | ||||||||
| (Millions) | % | % | % | g/t | ppm | g/t | |||
| Measured | 0.14 | 2.78 | 1.25 | 0.05 | 19 | 107 | 20 | ||
| Fault Zone | Indicated | 1.01 | 4.17 | 2.64 | 0.09 | 23 | 216 | 20 | |
| Inferred | 0.94 | 2.94 | 5.81 | 0.18 | 22 | 112 | 26 | ||
| Indicated | 0.48 | 4.01 | 3.82 | 0.02 | 21 | 56 | 6 | ||
| Série | |||||||||
| Récurrente | |||||||||
| Inferred | 0.34 | 2.57 | 1.02 | 0.06 | 8 | 29 | 1 | ||
| Fault Zone | |||||||||
| Inferred | 0.35 | 4.99 | 15.81 | 0.005 | 20 | 127 | 81 | ||
| Splay | |||||||||
| Measured | 0.14 | 2.78 | 1.25 | 0.05 | 19 | 107 | 20 | ||
| Indicated | 1.49 | 4.12 | 3.02 | 0.07 | 22 | 165 | 15 | ||
| Total | |||||||||
| Measured & | |||||||||
| 1.63 | 4.01 | 2.87 | 0.06 | 22 | 160 | 16 | |||
| Indicated | |||||||||
| Inferred | 1.64 | 3.30 | 6.97 | 0.12 | 19 | 98 | 33 | ||
| Contained Metal Quantities | |||||||||
| Cu | Zn | Pb | Ag | Co | Ge | ||||
| Category | Tonnes | ||||||||
| Zone | Pounds | Pounds | Pounds | Ounces | Pounds | Ounces | |||
| (Millions) | (Millions) | (Millions) | (Millions) | (Millions) | (Millions) | (Millions) | |||
| Measured | 0.14 | 8.5 | 3.8 | 0.2 | 0.09 | 0.03 | 0.09 | ||
| Fault Zone | |||||||||
| Indicated | 1.01 | 93.2 | 59.1 | 1.9 | 0.75 | 0.48 | 0.64 | ||
| Inferred | 0.94 | 61.1 | 120.9 | 3.8 | 0.68 | 0.23 | 0.79 | ||
| Indicated | 0.48 | 42.4 | 40.5 | 0.2 | 0.32 | 0.06 | 0.09 | ||
| Série | |||||||||
| Récurrente | |||||||||
| Inferred | 0.34 | 19.4 | 7.7 | 0.4 | 0.09 | 0.02 | 0.01 | ||
| Fault Zone | |||||||||
| Inferred | 0.35 | 38.9 | 123.3 | 0.0 | 0.23 | 0.10 | 0.92 | ||
| Splay | |||||||||
| Measured | 0.14 | 8.5 | 3.8 | 0.2 | 0.09 | 0.03 | 0.09 | ||
| Indicated | 1.49 | 135.7 | 99.6 | 2.1 | 1.08 | 0.54 | 0.73 | ||
| Total | |||||||||
| Measured & | |||||||||
| 1.63 | 144.1 | 103.4 | 2.3 | 1.16 | 0.58 | 0.82 | |||
| Indicated | |||||||||
| Inferred | 1.64 | 119.4 | 251.8 | 4.3 | 1.00 | 0.35 | 1.73 |
Notes:
1. All tabulated data has been rounded and as a result minor computational errors may occur.
2. Mineral Resources which are not Mineral Reserves have no demonstrated economic viability.
3. The Mineral Resource is reported as the total in-situ Mineral Resource.
4. Metal quantities are reported in multiples of Troy Ounces or Avoirdupois Pounds.
5. The cut-off grade calculation was based on the following assumptions: copper price of 2.97 USD/lb, mining cost of 50 USD/tonne, processing cost of 10 USD/tonne, G&A and holding cost of 10 USD/tonne, 90% copper recovery and 96% payable copper.
To demonstrate the sensitivity of the resources to cut-off grade, MSA tabulated the zinc-rich zones using a number of cut-off grades as shown in Table 3 (Measured and Indicated) and Table 4 (Inferred) respectively.
| Table 3: Kipushi Zinc-Rich Bodies Measured and Indicated Mineral Resource Grade Tonnage, 23 January 2016 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Cut Off | Tonnes | Zn | Contained | Cu | Pb | Ag | Co | Ge | |
| Zn Pounds | |||||||||
| Zn% | (Millions) | % | (Millions) | % | % | g/t | ppm | g/t | |
| 5 | 10.46 | 34.12 | 7870.0 | 0.65 | 0.95 | 19 | 15 | 50 | |
| 7 | 10.18 | 34.89 | 7833.3 | 0.65 | 0.96 | 19 | 15 | 51 | |
| 10 | 9.78 | 35.99 | 7757.4 | 0.63 | 0.98 | 19 | 15 | 52 | |
| 12 | 9.50 | 36.72 | 7689.4 | 0.62 | 1.00 | 19 | 15 | 53 | |
| 15 | 9.06 | 37.85 | 7559.1 | 0.59 | 1.01 | 20 | 15 | 54 |
Notes:
1. All tabulated data has been rounded and as a result minor computational errors may occur.
2. Mineral Resources which are not Mineral Reserves have no demonstrated economic viability.
3. The Mineral Resource is reported as the total in-situ Mineral Resource.
4. Metal quantities are reported in multiples of Troy Ounces or Avoirdupois Pounds.
| Table 4: Kipushi Zinc-Rich Bodies Inferred Mineral Resource Grade Tonnage, 23 January 2016 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Cut Off | Tonnes | Zn | Contained | Cu | Pb | Ag | Co | Ge | |
| Zn Pounds | |||||||||
| Zn% | (Millions) | % | (Millions) | % | % | g/t | ppm | g/t | |
| 5 | 1.89 | 27.98 | 1168.8 | 1.19 | 0.88 | 10 | 15 | 53 | |
| 7 | 1.87 | 28.24 | 1165.7 | 1.18 | 0.88 | 10 | 15 | 53 | |
| 10 | 1.82 | 28.85 | 1154.8 | 1.17 | 0.88 | 10 | 15 | 54 | |
| 12 | 1.75 | 29.47 | 1139.8 | 1.15 | 0.87 | 10 | 15 | 55 | |
| 15 | 1.56 | 31.42 | 1082.1 | 1.08 | 0.83 | 10 | 15 | 57 |
Notes:
1. All tabulated data has been rounded and as a result minor computational errors may occur.
2. Mineral Resources which are not Mineral Reserves have no demonstrated economic viability.
3. The Mineral Resource is reported as the total in-situ Mineral Resource.
The Measured and Indicated and Inferred Mineral Resource for the copper-rich bodies has been tabulated using a number of cut-off grades as shown in Tables 5 and 6 respectively.
| Table 5: Kipushi Copper-Rich Bodies Measured and Indicated Mineral Resource Grade Tonnage, 23 January 2016 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Cut Off | Tonnes | Cu | Contained | Zn | Pb | Ag | Co | Ge | |
| Cu Pounds | |||||||||
| Cu% | (Millions) | % | (Millions) | % | % | g/t | ppm | g/t | |
| 1.0 | 2.56 | 3.00 | 169.2 | 2.01 | 0.05 | 17 | 114 | 11 | |
| 1.5 | 1.63 | 4.01 | 144.1 | 2.87 | 0.06 | 22 | 160 | 16 | |
| 2.0 | 1.17 | 4.92 | 126.6 | 3.66 | 0.08 | 26 | 202 | 19 | |
| 2.5 | 0.95 | 5.54 | 115.8 | 4.06 | 0.08 | 29 | 227 | 20 | |
| 3.0 | 0.82 | 5.99 | 108.0 | 4.32 | 0.08 | 30 | 244 | 20 |
Notes:
1. All tabulated data has been rounded and as a result minor computational errors may occur.
2. Mineral Resources which are not Mineral Reserves have no demonstrated economic viability.
3. The Mineral Resource is reported as the total in-situ Mineral Resource.
4. Metal quantities are reported in multiples of Troy Ounces or Avoirdupois Pounds.
| Table 6: Kipushi Copper-Rich Bodies Inferred Mineral Resource Grade Tonnage, 23 January 2016 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Cut Off | Tonnes | Cu | Contained | Zn | Pb | Ag | Co | Ge | |
| Cu Pounds | |||||||||
| Cu% | (Millions) | % | (Millions) | % | % | g/t | ppm | g/t | |
| 1.0 | 2.40 | 2.64 | 139.8 | 5.85 | 0.09 | 16 | 79 | 29 | |
| 1.5 | 1.64 | 3.30 | 119.4 | 6.97 | 0.12 | 19 | 98 | 33 | |
| 2.0 | 1.24 | 3.81 | 104.2 | 7.29 | 0.13 | 20 | 109 | 33 | |
| 2.5 | 0.90 | 4.40 | 87.6 | 8.01 | 0.13 | 21 | 113 | 34 | |
| 3.0 | 0.68 | 4.95 | 74.0 | 8.38 | 0.15 | 21 | 118 | 34 |
Notes:
1. All tabulated data has been rounded and as a result minor computational errors may occur.
2. Mineral Resources which are not Mineral Reserves have no demonstrated economic viability.
3. The Mineral Resource is reported as the total in-situ Mineral Resource.
4. Metal quantities are reported in multiples of Troy Ounces or Avoirdupois Pounds.
The Mineral Resource has been declared from approximately 1,150 metres below surface, extensive mining having historically taken place in the levels above. Although exploration potential, including pillars and remnants, exists above the -1,150-metre level, this has not been closely examined during the current phase of exploration activity and was not included in the model for reporting of the Mineral Resource. The maximum depth of the Mineral Resource of 1,810 metres below surface is dictated by the extent of drilling. The Mineral Resource plunges toward the DRC-Zambia border and therefore has been constrained to the area considered to be within the DRC.
Final drill results from underground exploration confirm expansion of the Big Zinc Zone and Fault Zone and demonstrate that the mineralized zones are still open.
Additional exploration drilling in the southern extension area sucessfully confirmed that both the Big Zinc Zone and Fault Zone remain open at depth and to the south with significant intersections on both structures in recent drilling. Additional high-grade copper-zinc-germanium mineralization also was discovered in the Fault Zone and in Fault Zone Splay in the immediate footwall of the Fault Zone. The new assay results and the interpretation of the connectivity of the zones with the main Big Zinc body are shown in Figures 4, 5 and 6. The disclosed results were included in the database used for the resource estimate. Highlights of the drilling included:
- KPU079 drilled on section line 6S intersected 11.8 metres of mixed massive
sulphide, (4.2 metres true thickness) grading 4.0% copper, 16.5% zinc, 6 g/t silver and 61 g/t germanium. At 1,825 metres below surface this remains the deepest intersection to date from the Kipushi Project.
- KPU081 drilled on section line 6S intersected Big Zinc sphalerite from 289.6
metres to 308.1 metres grading 39.8% zinc, 0.3% copper and 80 g/t germanium and from 361.8 metres to 373.2 metres grading 47.8% zinc, 0.2% copper and 58 g/t germanium. The hole continued to a Fault Zone Splay intersection of 60.5 metres (21.7 metres true thickness) grading 2.6% copper, 36.2% zinc, 19 g/t silver and 204 g/t germanium to a depth of 1,763 metres. Included in this interval was an intersection from 580.9 metres to 591.3 metres (3.8 metres true thickness) grading 56.3% zinc, 0.5% copper, 12 g/t silver and 397 g/t germanium.
- KPU095 drilled on section line 6S intersected 46.8 metres of Big Zinc massive
sphalerite grading 43.0% zinc, 0.4% copper and 59 g/t germanium. A second Fault Zone interval intersected 21.9 metres (6.0 metres true thickness) of massive chalcopyrite grading 14.5% copper, 7.0% zinc and 58 g/t silver.
Table 7: Summary of recent assay results by Ivanhoe Mines at Kipushi (part 1).
| BHID | Line | Dip to BRG | Area | From | To | Length | True Width | Au | Ag | Co | Cu | Ge | Zn | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (m) | (m) | (m) | (m) | g/t | g/t | ppm | % | g/t | % | % | ||||
| KPU074 | 11N-29N | -31 to 055 | FZ-NR | 71.3 | 96.0 | 24.7 | 22.6 | 0.0 | 20 | 818 | 9.1 | 8 | 7.6 | 14 |
| 105.9 | 109.0 | 3.1 | 2.8 | 0.0 | 24 | 80 | 9.6 | 5 | 0.2 | 10 | ||||
| KPU075 | N-S | -57 to 172 | BZ | 325.6 | 352.4 | 26.8 | - | 0.0 | 4 | 2 | 0.2 | 64 | 39.2 | 34 |
| KPU076 | 11N-29N | -22 to 043 | FZ-NR | 82.0 | 87.0 | 5.1 | 2.0 | 0.0 | 5 | 216 | 2.4 | 0 | 0.0 | 3 |
| 90.4 | 94.0 | 3.6 | 1.4 | 0.0 | 6 | 0 | 2.5 | 0 | 0.0 | 3 | ||||
| KPU077 | 0S-12S | -52 to 282 | BZ | 309.2 | 334.9 | 25.8 | - | 0.0 | 6 | 1 | 0.2 | 54 | 44.0 | 33 |
| 355.6 | 360.4 | 4.8 | - | 0.1 | 24 | 166 | 5.8 | 12 | 5.4 | 26 | ||||
| 456.7 | 465.1 | 8.5 | - | 0.0 | 2 | 3 | 0.2 | 63 | 37.4 | 22 | ||||
| KPU078 | 11N-29N | -52 to 053 | FZ-NR | 136.0 | 140.0 | 4.0 | 1.9 | 0.0 | 14 | 0 | 3.7 | 0 | 0.1 | 4 |
| KPU079 | 6S-5N | -51 to 317 | BZ | 278.8 | 293.5 | 14.7 | - | 0.0 | 10 | 3 | 0.3 | 78 | 47.0 | 35 |
| 323.1 | 334.5 | 11.3 | - | 0.0 | 4 | 2 | 0.1 | 44 | 43.4 | 35 | ||||
| FZS | 688.1 | 699.9 | 11.8 | 4.2 | 0.0 | 6 | 250 | 4.0 | 61 | 16.5 | 31 | |||
| including | 688.1 | 691.5 | 3.4 | 1.2 | 0.0 | 2 | 7 | 0.2 | 175 | 56.1 | 32 | |||
| including | 691.9 | 699.9 | 8.0 | 2.9 | 0.1 | 8 | 364 | 5.7 | 15 | 0.4 | 31 | |||
| KPU080 | 17N-21N | -81 to 024 | FZ-NR | 132.0 | 135.2 | 3.2 | 1.7 | 0.0 | 11 | 8 | 2.2 | 0 | 0.1 | 2 |
| 140.0 | 158.6 | 18.6 | 10.1 | 0.0 | 26 | 28 | 5.7 | 2 | 0.1 | 6 | ||||
| 162.0 | 168.0 | 6.0 | - | 0.0 | 16 | 5 | 3.6 | 6 | 0.0 | 4 | ||||
| KPU081 | 6S-4S | -55 to 305 | BZ | 289.6 | 308.1 | 18.5 | - | 0.0 | 11 | 0 | 0.3 | 80 | 39.8 | 36 |
| 361.8 | 373.2 | 11.5 | - | 0.0 | 6 | 5 | 0.2 | 58 | 47.8 | 36 | ||||
| FZS | 530.9 | 591.4 | 60.5 | 21.7 | 0.0 | 19 | 65 | 2.6 | 204 | 36.2 | 31 | |||
| FZS | 552.9 | 572.0 | 19.1 | 6.8 | 0.0 | 34 | 128 | 6.9 | 28 | 10.4 | 29 | |||
| FZS | 580.9 | 591.4 | 10.5 | 3.8 | 0.0 | 12 | 17 | 0.5 | 397 | 56.3 | 32 | |||
| KPU082 | 6S-4S | -43 to 313 | BZ | 258.0 | 261.0 | 3.0 | - | 0.0 | 1 | 0 | 0.1 | 20 | 11.9 | 7 |
| 280.1 | 304.8 | 24.7 | - | 0.0 | 8 | 1 | 0.2 | 78 | 49.2 | 34 | ||||
| FZ-EX | 403.0 | 416.9 | 13.9 | 5.7 | 0.0 | 15 | 191 | 4.5 | 6 | 0.2 | 10 | |||
| KPU083 | 4S | -34 to 307 | FZ-EX | 254.6 | 270.8 | 16.2 | 8.8 | 0.0 | 28 | 0 | 6.3 | 186 | 0.1 | 8 |
| 291.3 | 299.1 | 7.8 | 4.3 | 0.0 | 21 | 122 | 2.3 | 25 | 8.2 | 24 | ||||
| KPU084 | 17-19N | -78 to 340 | FZ-NR | 251.0 | 256.4 | 5.4 | 1.3 | 0.0 | 10 | 0 | 0.0 | 2 | 16.8 | 17 |
| KPU085 | 15N | -49 to 121 | FZ | 83.7 | 91.2 | 7.5 | 6.7 | 0.0 | 19 | 367 | 4.9 | 6 | 0.1 | 7 |
| BZ | 134.0 | 160.6 | 26.6 | 0.0 | 78 | 35 | 1.0 | 35 | 35.5 | 25 | ||||
| 134.0 | 137.5 | 3.5 | 0.0 | 151 | 250 | 6.8 | 41 | 18.7 | 20 | |||||
| 181.2 | 186.6 | 5.5 | 0.0 | 3 | 0 | 0.1 | 52 | 34.5 | 20 | |||||
| KPU086 | 17N | -51 to 124 | FZ | No Significant Intercept | 29 | |||||||||
| BZ | 147.2 | 164.4 | 17.2 | 0.0 | 90 | 4 | 0.3 | 30 | 38.8 | |||||
| 189.4 | 192.1 | 2.7 | 0.0 | 9 | 0 | 0.2 | 34 | 23.8 | 26 | |||||
| KPU087 | 19N | -45 to 112 | FZ-NR | 75.6 | 87.0 | 11.4 | 10.6 | 0.0 | 26 | 12 | 5.4 | 1 | 0.5 | 6 |
| 75.6 | 81.6 | 6.0 | 5.5 | 0.0 | 37 | 22 | 7.8 | 3 | 0.4 | 9 |
Note: Kipushi FZ = Kipushi Fault Zone; NR = Nord Riche, BZ = Big Zinc, FZS = Splay of Fault Zone at depth. True thickness not calculated for irregular replacement mineralized zones.
Table 8: Summary of recent assay results by Ivanhoe Mines at Kipushi (part 2).
| BHID | Line | Dip to BRG | Area | From | To | Length | True Width | Au | Ag | Co | Cu | Ge | Zn | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (m) | (m) | (m) | (m) | g/t | g/t | ppm | % | g/t | % | % | ||||
| KPU088 | 6S | 0 | abandoned | |||||||||||
| KPU089 | 6S | -62 to 303 | No Significant Intercept | |||||||||||
| KPU090 | 1N | -48 to 313 | BZ | 283.5 | 303.3 | 19.8 | - | 0.0 | 8 | 0 | 0.4 | 43 | 47.0 | 37 |
| FZS | 500.1 | 508.6 | 8.5 | 3.6 | 0.0 | 42 | 148 | 8.1 | 0 | 0.1 | 35 | |||
| KPU091 | 6S | -59 to 301 | BZ | 381.8 | 430.4 | 48.6 | - | 0.1 | 11 | 56 | 2.9 | 76 | 40.5 | 35 |
| including | 381.8 | 412.1 | 30.3 | - | 0.0 | 7 | 9 | 0.1 | 100 | 51.1 | 34 | |||
| BZ | 412.1 | 420.2 | 8.1 | - | 0.1 | 35 | 299 | 15.8 | 6 | 0.4 | 35 | |||
| BZ | 420.2 | 430.4 | 10.2 | - | 0.0 | 6 | 5 | 0.9 | 57 | 38.7 | 37 | |||
| KPU092 | 2N | -53 to 207 | BZ | 283.6 | 306.0 | 22.4 | - | 0.0 | 7 | 1 | 0.2 | 62 | 44.6 | 34 |
| BZ | 352.1 | 356.5 | 4.4 | - | 0.0 | 3 | 2 | 0.1 | 48 | 38.0 | 28 | |||
| FZS | 514.4 | 524.0 | 9.6 | 3.7 | 0.0 | 15 | 19 | 0.3 | 262 | 58.9 | 32 | |||
| 589.2 | 623.0 | 33.8 | 13.2 | 0.0 | 19 | 240 | 4.6 | 200 | 28.8 | 30 | ||||
| including | 589.2 | 600.0 | 10.8 | 4.2 | 0.0 | 32 | 667 | 12.5 | 1 | 0.2 | 30 | |||
| 601.7 | 623.0 | 21.3 | 8.3 | 0.0 | 13 | 32 | 0.8 | 316 | 45.7 | 30 | ||||
| KPU093 | 0-29N | -43 to 311 | 178.0 | 181.0 | 3.0 | - | 0.0 | 0 | 0 | 0.1 | 173 | 24.3 | 14 | |
| 206.8 | 210.3 | 3.6 | - | 0.1 | 6 | 0 | 0.3 | 62 | 25.5 | 25 | ||||
| 218.0 | 234.4 | 16.4 | - | 0.0 | 4 | 0 | 0.2 | 78 | 33.3 | 30 | ||||
| 257.0 | 261.7 | 4.7 | - | 0.0 | 4 | 0 | 0.2 | 77 | 41.7 | 28 | ||||
| KPU093 | 0-29N | -43 to 311 | BZ | 304.0 | 338.5 | 34.5 | - | 0.0 | 9 | 6 | 0.2 | 39 | 45.8 | 34 |
| 379.7 | 383.0 | 3.3 | - | 0.0 | 4 | 6 | 0.3 | 192 | 40.4 | 21 | ||||
| 452.4 | 455.0 | 2.6 | - | 0.0 | 13 | 154 | 4.3 | 57 | 15.8 | 21 | ||||
| 473.0 | 482.4 | 9.4 | - | 0.0 | 12 | 6 | 0.1 | 75 | 28.5 | 16 | ||||
| KPU093 W1 | 0-29N | -43to311 | BZ | 492.0 | 495.1 | 3.1 | - | 0.0 | 6 | 23 | 0.5 | 24 | 46.3 | 29 |
| KPU094 | 10S | -22 to 296 | FZ-FZS | 192.9 | 196.3 | 3.3 | 2.4 | 0.0 | 5 | 15 | 0.4 | 13 | 5.7 | 6 |
| KPU095 | 6S | -48 to 302 | BZ | 278.0 | 324.8 | 46.8 | - | 0.0 | 8 | 7 | 0.4 | 59 | 43.0 | 33 |
| FZ | 507.9 | 529.7 | 21.9 | 6.0 | 0.0 | 58 | 53 | 14.5 | 9 | 7.0 | 32 | |||
| including | 511.0 | 529.7 | 18.7 | 5.2 | 0.1 | 67 | 61 | 16.8 | 6 | 1.8 | 32 | |||
| KPU096 | 8S | -42 to 297 | BZ | 388.1 | 391.1 | 2.9 | - | 0.0 | 10 | 0 | 0.3 | 27 | 34.2 | 36 |
| FZ | 398.6 | 402.0 | 3.4 | 1.3 | 0.0 | 12 | 19 | 1.8 | 46 | 0.2 | 13 | |||
| KPU097 | 10S | -50 to 298 | BZ | 291.6 | 337.4 | 45.8 | - | 0.0 | 9 | 13 | 0.3 | 52 | 39.1 | 33 |
| including | 291.6 | 328.5 | 36.8 | - | 0.0 | 8 | 11 | 0.2 | 56 | 43.2 | 35 |
Note: FZ=Kipushi Fault Zone; NR = Nord Riche, BZ = Big Zinc, FZS = Splay off Fault Zone at depth.
True thickness not calculated for irregular replacement mineralized zones.
Figure 2: Schematic Kipushi cross-section showing mine infrastructure, the Big Zinc and Kipushi Fault zones.