1. | REPORTING ISSUER |
2. | DATE OF MATERIAL CHANGE May 11, 2010 |
|
3. | PRESS RELEASE |
4. | SUMMARY OF MATERIAL CHANGE |
5. | FULL DESCRIPTION OF MATERIAL CHANGE |
| Lift 1 of the planned underground block cave on the Hugo North Deposit
contains 437 million tonnes of probable reserves at 1.90% copper and 0.42 grams of
gold per tonne. |
| The planned open pit on the Southern Oyu copper and gold deposits
contains a Proven and Probable Reserves of 955 million tonnes at 0.49% copper and
0.35 grams of gold per tonne. |
| The total mineral reserve (Proven & Probable) contains 1.393 billion
tonnes at 0.93% copper and 0.37 grams of gold per tonne. |
| Total production of 25.2 billion pounds (11.5 million tonnes) of copper
and 13.1 million ounces of gold is projected from mining only the open pit on the
Southern Oyu deposits and Lift 1 of the underground block cave on the Hugo North
Deposit. |
| Production is expected to commence in mid-2013. |
| The ore processing plant would be expanded from an initial 36.5 million
tonnes per year to 58 million tonnes per year (100,000 to 160,000 tonnes per day)
by the end of the fifth year of operations. |
| Peak single-year production is estimated at 1.7 billion pounds (800,000
tonnes) of copper and 1.1 million ounces of gold. |
- 2 -
| The economic analysis projects an after-tax NPV of US$4.536 billion at an
8% discount rate, an IRR of 16.33% and a payback period of 6.32 years (based on
US$2.00/lb. copper and US$850/oz. gold). |
| Based on current metal prices of US$3.23/lb. copper and US$1,200/oz. gold,
the estimated NPV would be US$12.6 billion, with an IRR of 26.3% and a payback
period of 4.73 years. |
| The projected 59-year mine life incorporates the Reserve Cases proven
and probable mineral reserves at the Southern Oyu open pit and the Hugo North
block-caves Lift 1 and also adds inferred resources from the Hugo North
block-caves second lift (Lift 2) and the Hugo South and Heruga deposits. |
| Oyu Tolgoi would process an average of 58 million tonnes of ore per year,
yielding total production of 52.5 billion pounds of copper (23.8 million tonnes)
and 26.4 million ounces of gold. |
| Mining of all resources would yield an after-tax NPV of US$5.614 billion (based on
US$2.00/lb. copper and US$850/oz. gold). |
| Based on current metal prices of US$3.23/lb. copper and US$1,200/oz. gold,
the NPV would be US$15.3 billion, with an IRR of 26.7% and a payback period of
4.62 years. |
| 1.4 billion tonnes classified as measured and indicated at an average
grade of 1.33% copper and 0.47g/t gold. |
| 2.4 billion tonnes are classified as inferred at an average grade of
0.78% copper and 0.33g/t gold. |
- 3 -
| The measured and indicated resource classifications contain an estimated
40.7 billion pounds of copper and 21 million ounces of gold. The inferred
classification contains an additional 40.6 billion pounds of copper and 25.4
million ounces of gold. |
Life of Mine (Sensitivity) | ||||
Description | Reserve Case | Case | ||
Inventory |
Mineral Reserve | Mineral Reserve plus Inferred Resources | ||
Production rate |
58 mt/a | 58 mt/a | ||
Total processed |
1 393 million tonnes | 3 019 million tonnes | ||
NSR |
US$32.57/t | US$32.37/t | ||
Copper grade |
0.93% | 0.89% | ||
Gold grade |
0.37g/t | 0.34g/t | ||
Copper recovered |
25.2 billion lb. | 52.6 billion lb. | ||
Gold recovered |
13.1 million oz. | 26.4 million oz. | ||
Mine life |
27 years | 59 years | ||
Initial
Capital (100,000 tpd concentrator Southern Oyu Open Pit) |
US$3.5 billion | US$3.5 billion | ||
Pre-production underground capital |
US$1.1 billion | US$1.1 billion | ||
Total project cash requirement |
US$4.6 billion | US$4.6 billion | ||
10-year cash cost (net of gold credits) |
0.45 cents/lb. | 0.44 cents/lb. | ||
NPV (8%) After Tax |
US$4 536m | US$5 614m | ||
IRR after tax |
16.33% | 16.73% | ||
Payback period |
6.32 years | 6.22 years |
1. | The NSR has been calculated with assumptions for smelter refining and treatment charges,
deductions and payment terms, transport costs, metallurgical recoveries and royalties. NSR in
this table is based on metal prices of: copper US$1.80/lb, gold US$800/oz, silver US$13.50/oz,
molybdenum US$13.50/lb. |
|
2. | Long term metal prices used in the NPV, IRR and Payback economic analyses are: copper
US$2.00/lb, gold US$850/oz, silver US$13.50/oz, molybdenum US$13.50/lb. |
|
3. | Under the NI 43-101 guidelines, inferred mineral resources are considered too speculative
geologically to have the economic considerations applied to them that would allow them to be
categorized as mineral reserves, and there is no certainty that the Life of Mine (Sensitivity)
Case will be realized. |
- 4 -
Metal Price Sensitivity Reserve Case | ||||||||||||||||||||||||||||
After-tax values | Gold price/oz | |||||||||||||||||||||||||||
Copper price/lb |
$ | 750 | $ | 850 | $ | 1,000 | $ | 1,200 | $ | 1,500 | $ | 1,750 | $ | 2,000 | ||||||||||||||
(Base | ) | (Current | ) | |||||||||||||||||||||||||
$1.50 |
1,346 | 1,680 | 2,173 | 2,824 | 3,784 | 4,580 | 5,377 | |||||||||||||||||||||
$2.00 (Base) |
4,218 | 4,536 | 5,011 | 5,648 | 6,602 | 7,391 | 8,188 | |||||||||||||||||||||
$2.50 |
7,035 | 7,353 | 7,826 | 8,460 | 9,416 | 10,210 | 11,000 | |||||||||||||||||||||
$3.23 (Current) |
11,145 | 11,464 | 11,937 | 12,569 | 13,516 | 14,309 | 15,100 | |||||||||||||||||||||
$3.50 |
12,663 | 12,979 | 13,452 | 14,084 | 15,037 | 15,827 | 16,617 | |||||||||||||||||||||
$4.00 |
15,469 | 15,788 | 16,265 | 16,899 | 17,847 | 18,638 | 19,428 | |||||||||||||||||||||
$5.00 |
21,097 | 21,413 | 21,887 | 22,520 | 23,464 | 24,250 | 25,039 | |||||||||||||||||||||
$6.00 |
26,715 | 27,029 | 27,502 | 28,134 | 29,083 | 29,870 | 30,654 |
- 5 -
Metal Price Sensitivity Life-of-Mine Sensitivity Case | ||||||||||||||||||||||||||||
After-tax values | Gold price/oz | |||||||||||||||||||||||||||
Copper price/lb |
$ | 750 | $ | 850 | $ | 1,000 | $ | 1,200 | $ | 1,500 | $ | 1,750 | $ | 2,000 | ||||||||||||||
(Base | ) | (Current | ) | |||||||||||||||||||||||||
$1.50 |
1,777 | 2,137 | 2,671 | 3,377 | 4,412 | 5,269 | 6,126 | |||||||||||||||||||||
$2.00 (Base) |
5,268 | 5,614 | 6,127 | 6,815 | 7,840 | 8,698 | 9,559 | |||||||||||||||||||||
$2.50 |
8,703 | 9,043 | 9,556 | 10,244 | 11,277 | 12,131 | 12,986 | |||||||||||||||||||||
$3.23 (Current) |
13,715 | 14,056 | 14,568 | 15,253 | 16,287 | 17,143 | 17,999 | |||||||||||||||||||||
$3.50 |
15,563 | 15,905 | 16,422 | 17,111 | 18,140 | 18,996 | 19,852 | |||||||||||||||||||||
$4.00 |
19,002 | 19,346 | 19,859 | 20,544 | 21,571 | 22,427 | 23,285 | |||||||||||||||||||||
$5.00 |
25,865 | 26,208 | 26,725 | 27,412 | 28,442 | 29,300 | 30,155 | |||||||||||||||||||||
$6.00 |
32,740 | 33,083 | 33,597 | 34,280 | 35,305 | 36,158 | 37,014 |
| an estimated 40.6 billion pounds (18.4 million tonnes) of copper, an
increase of 2.4 billion pounds (1.1 million tonnes), or 6.2%, since March 2008; |
| 25.4 million ounces of gold, an increase of 1.1 million ounces, or 4.8%,
since March 2008; and |
||
| a copper equivalent of 53.3 billion pounds (24.1 million tonnes), an
increase of 3.2 billion pounds (1.5 million tonnes), or 6.4%, since March 2008. |
- 6 -
Contained Metal(4) | |||||||||||||||||||||||||||||||||||
Resource | Cu | Au | Mo | CuEq(3) | Cu | Au | CuEq(3) | ||||||||||||||||||||||||||||
Category | Tonnes | (%) | (g/t) | (ppm) | (%) | (000 lbs) | (ounces) | (000 lbs) | |||||||||||||||||||||||||||
Measured |
101,590,000 | 0.64 | 1.10 | | 1.34 | 1,430,000 | 3,590,000 | 3,000,000 | |||||||||||||||||||||||||||
Indicated |
1,285,840,000 | 1.38 | 0.42 | | 1.65 | 39,120,000 | 17,360,000 | 46,770,000 | |||||||||||||||||||||||||||
Measured +
Indicated |
1,387,430,000 | 1.33 | 0.47 | | 1.63 | 40,680,000 | 20,970,000 | 49,860,000 | |||||||||||||||||||||||||||
Inferred |
2,367,130,000 | 0.78 | 0.33 | 50 | 1.02 | 40,610,000 | 25,390,000 | 53,280,000 |
1. | Resource classifications conform to CIM Standards on mineral resources and reserves referred
to in National Instrument 43-101. Mineral resources that are not reserves do not have
demonstrated economic viability. Measured and indicated resources are that part of a mineral
resource for which quantity and grade can be estimated with a level of confidence sufficient
to allow the application of technical and economic parameters to support mine planning and
evaluation of the economic viability of the project. An inferred resource is that part of a
mineral resource for which quantity and grade can be estimated on the basis of geological
evidence and limited sampling and reasonably assumed, but not verified, geological and grade
continuity. |
|
2. | This table includes estimated resources on the Hugo North Extension Deposit and the Heruga
Deposit. These deposits are located on mineral licences owned by Entrée but subject to the
Entrée Joint Venture. These resources consist of indicated resources of 117,000,000 tonnes
grading 1.8% copper and 0.61 g/t gold and Inferred Resources of 910,000,000 tonnes grading
0.48% copper and 0.49 g/t gold and a 141ppm molybdenum at a 0.6% cut-off grade on the combined
Hugo North Extension and Heruga Deposits. |
|
3. | CuEq has been calculated using assumed metal prices ($1.35/lb. for copper and $650/oz for
gold and $10/lb for molybdenum); %CuEq. = Cu+((Au*18.98)+(Mo*0.01586))/29.76. Mo grades
outside of Heruga are assumed to be zero for CuEq calculations. The CuEq formula also took
into account the different levels of metallurgical recovery for the metals. Gold was assumed
to have only 91% of copper recovery, molybdenum only 72% of copper recovery. |
|
4. | The contained gold and copper represent estimated contained metal in the ground and have not
been adjusted for the metallurgical recoveries of gold and copper. Differences in measured and
indicated totals relate to rounding associated with tonnes and grade. |
- 7 -
Total Oyu Tolgoi Project Mineral Reserve, May 2010 | ||||||||||||||||||||||||
Recovered Metal | ||||||||||||||||||||||||
Ore | NSR | Cu | Au | Copper | Gold | |||||||||||||||||||
Deposit | (Mt) | ($/t) | (%) | (g/t) | (Mlb) | (koz) | ||||||||||||||||||
Southern Oyu Deposits |
||||||||||||||||||||||||
Proven |
127 | 21.38 | 0.58 | 0.93 | 1 399 | 2 994 | ||||||||||||||||||
Probable |
828 | 10.81 | 0.48 | 0.27 | 6 980 | 5 229 | ||||||||||||||||||
Mineral Reserve (Proven + Probable) |
955 | 12.21 | 0.49 | 0.35 | 8 380 | 8 223 | ||||||||||||||||||
Hugo Dummett Deposits |
||||||||||||||||||||||||
Probable (Hugo North Ivanhoe) |
410 | 51.12 | 1.90 | 0.40 | 15 823 | 4 368 | ||||||||||||||||||
Probable (Hugo North EJV Shivee Tolgoi) |
27 | 55.57 | 1.85 | 0.72 | 1 032 | 531 | ||||||||||||||||||
Mineral Reserve (Probable) (All Hugo North) |
437 | 51.40 | 1.90 | 0.42 | 16 855 | 4 899 | ||||||||||||||||||
Oyu Tolgoi Project Mineral Reserve |
||||||||||||||||||||||||
Proven |
127 | 21.38 | 0.58 | 0.93 | 1 399 | 2 994 | ||||||||||||||||||
Probable |
1 266 | 24.84 | 0.97 | 0.32 | 23 835 | 10 127 | ||||||||||||||||||
Mineral Reserve (Proven + Probable) |
1 393 | 24.52 | 0.93 | 0.37 | 25 234 | 13 121 |
1. | Metal prices used for calculating the Southern Oyu Open Pit NSR are copper US$1.30/lb., gold
US$500/oz., and silver US$9.50/oz., based on long-term metal price forecasts at the beginning
of the mineral reserve work. The analysis indicates that the reserve is still valid at these
metal prices. |
|
2. | Metal prices used for calculating the Hugo North Underground NSR are copper US$1.50/lb., gold
US$640/oz. and silver US$10.50/oz., based on long-term metal price forecasts at the beginning
of the mineral reserve work. The analysis indicates that the reserve is still valid at these
metal prices. |
|
3. | The base case financial analysis has been prepared using current long term metal price
estimates of copper US$2.00/lb., gold US$850/oz. and silver US$13.50/oz. |
|
4. | For the open pit, the processing and general administration operating costs that have been
used to determine cut-off grades are: Southwest and Central Chalcopyrite US$3.88/t, Central
Chalcocite and Central Covellite US$3.41/t. |
- 8 -
5. | The NSR has been calculated with assumptions for smelter refining and treatment charges,
deductions and payment terms, concentrate transport, metallurgical recoveries and royalties. |
|
6. | For the underground block cave, all material within the shell has been converted to mineral
reserve. This includes inferred material with zero grade that has been treated as dilution. |
|
7. | Only measured resources were used to report proven reserves and only indicated resources were
used to report probable reserves. |
|
8. | EJV is the Entrée Gold Joint Venture. Ivanhoe Mines rights in the Shivee Tolgoi and
Javkhlant mining licences are included in the Contract Area covered by the Oyu Tolgoi
Investment Agreement. Activities in the Contract Area will be the responsibility of Oyu Tolgoi
LLC, which will receive 70-80% of cash flows from the EJV licences after capital and operating
costs. |
|
9. | The mineral reserves are not additive to the mineral resources. |
- 9 -
- 10 -
Oyu Tolgoi mineral resource summary based on the March 31, 2010 Technical Report | ||||||||||||||||||||||||||||
Copper | Contained Metal | |||||||||||||||||||||||||||
Tonnage | Copper | Gold | Equiv. | Copper | Gold | Copper Equiv. | ||||||||||||||||||||||
Deposit | (t) | (%) | (g/t) | (%) | (000 lb) | (oz) | (000 lb) | |||||||||||||||||||||
Southern Oyu Deposits |
||||||||||||||||||||||||||||
Measured |
101 590 000 | 0.64 | 1.10 | 1.34 | 1 430 000 | 3 590 000 | 3 000 000 | |||||||||||||||||||||
Indicated |
465 640 000 | 0.62 | 0.43 | 0.89 | 6 360 000 | 6 440 000 | 9 140 000 | |||||||||||||||||||||
Measured
+ Indicated |
567 230 000 | 0.62 | 0.55 | 0.97 | 7 750 000 | 10 030 000 | 12 130 000 | |||||||||||||||||||||
Inferred |
88 500 000 | 0.47 | 0.41 | 0.73 | 920 000 | 1 170 000 | 1 420 000 | |||||||||||||||||||||
Hugo Dummett Deposits |
||||||||||||||||||||||||||||
Indicated (Hugo North Ivanhoe) |
703 200 000 | 1.82 | 0.39 | 2.07 | 28 220 000 | 8 820 000 | 32 090 000 | |||||||||||||||||||||
Indicated Shivee
Tolgoi (Hugo North EJV) |
117 000 000 | 1.80 | 0.61 | 2.19 | 4 640 000 | 2 290 000 | 5 650 000 | |||||||||||||||||||||
Indicated (All Hugo North) |
820 200 000 | 1.82 | 0.42 | 2.08 | 32 910 000 | 11 080 000 | 37 610 000 | |||||||||||||||||||||
Inferred (Hugo North Ivanhoe) |
722 800 000 | 0.97 | 0.30 | 1.17 | 15 460 000 | 6 970 000 | 18 640 000 | |||||||||||||||||||||
Inferred Shivee
Tolgoi (Hugo North EJV) |
95 500 000 | 1.15 | 0.31 | 1.35 | 2 420 000 | 950 000 | 2 840 000 | |||||||||||||||||||||
Inferred (All Hugo North) |
818 300 000 | 1.00 | 0.30 | 1.19 | 18 040 000 | 7 890 000 | 21 470 000 | |||||||||||||||||||||
Inferred (Hugo South) |
490 330 000 | 1.05 | 0.09 | 1.11 | 11 350 000 | 1 420 000 | 12 000 000 | |||||||||||||||||||||
Inferred (Hugo North and South) |
1 308 630 000 | 1.02 | 0.22 | 1.16 | 29 430 000 | 9 260 000 | 33 470 000 | |||||||||||||||||||||
Heruga Deposit |
||||||||||||||||||||||||||||
Heruga Javkhlant EJV |
910 000 000 | 0.48 | 0.49 | 0.87 | 9 570 000 | 14 300 000 | 17 390 000 | |||||||||||||||||||||
Heruga Ivanhoe |
60 000 000 | 0.48 | 0.37 | 0.78 | 670 000 | 700 000 | 1 090 000 | |||||||||||||||||||||
Inferred (All Heruga) |
970 000 000 | 0.48 | 0.48 | 0.86 | 10 240 000 | 15 000 000 | 18 480 000 | |||||||||||||||||||||
Oyu Tolgoi
Project Grand Total |
||||||||||||||||||||||||||||
Measured |
101 590 000 | 0.64 | 1.10 | 1.34 | 1 430 000 | 3 590 000 | 3 000 000 | |||||||||||||||||||||
Indicated |
1 285 840 000 | 1.38 | 0.42 | 1.65 | 39 120 000 | 17 360 000 | 46 770 000 | |||||||||||||||||||||
Measured
+ Indicated |
1 387 430 000 | 1.33 | 0.47 | 1.63 | 40 680 000 | 20 970 000 | 49 860 000 | |||||||||||||||||||||
Inferred |
2 367 130 000 | 0.78 | 0.33 | 1.02 | 40 610 000 | 25 390 000 | 53 280 000 |
1. | The contained gold and copper estimates in the tables have not been adjusted for
metallurgical recoveries. |
|
2. | The 0.6% CuEq cut-off has been used to enable comparison with previous disclosures. |
|
3. | The mineral reserves are not additive to the mineral resources. |
- 11 -
4. | CuEq has been calculated using assumed metal prices (US$1.35/lb. for copper and US$650/oz
for gold and US$10/lb for molybdenum); %CuEq. = Cu+((Au*18.98)+(Mo*0.01586))/29.76. Mo grades
outside of Heruga are assumed to be zero for CuEq calculations. |
|
5. | Mineral resources that are not mineral reserves do not have demonstrated economic viability. |
|
6. | EJV is the Entrée Gold Joint Venture. The Shivee Tolgoi and Javkhlant licences are held by
Entrée Gold. The Shivee Tolgoi and Javkhlant licences are planned to be operated by Oyu Tolgoi
LLC. Oyu Tolgoi LLC will receive 80% of cash flows after capital and operating costs. |
| Bernard Peters, B.Eng. (Mining), M. AusIMM (201743), employed by AMEC Minproc Limited as
Principal Mining Consultant, was responsible for the overall preparation of the report and, in
particular, the open-pit mineral reserve estimate of the Technical Report. |
||
| Scott Jackson, B.Sc. (Hons), CFSG, M. AusIMM (201735), employed by Quantitative Group Pty. Ltd.
(trading as QG) as Principal Consultant, was responsible for preparation of the mineral
resources. |
||
| John Vann, B.App.Sc., B.Sc. (Hons), M.Sc., F.Aus.I.M.M. (103352), F.A.I.G., M.S.E.G, employed
by Quantitative Group Pty. Ltd. (trading as QG) as Principal Consultant, was responsible for
preparation of the mineral resources. |
||
| Albert Chance, B.App.Sc., Association of Professional Engineers of the Province of British
Columbia (no. 16370), an employee of Golder Associates Ltd., was responsible for preparation of
the subsection on Open Pit Mine Geotechnical. |
||
| George R Stephan, E.M. (Engineer of Mines), MBA, Qualified Professional Member Mining and
Metallurgical Society of America an employee of Stantec Mining (formerly McIntosh Engineering),
was responsible for the underground mineral reserve estimate of the Technical Report. |
||
| Jarek Jakubec, C.Eng., an employee of SRK Consulting Inc., was responsible for preparation of
the subsection on Underground Mine Geotechnical Sections. |
||
| Dean David, B.App.Sc. (Metallurgy), AusIMM.(102351), employed by AMEC Minproc Limited as
Process Consultant, was responsible for preparation of the Processing Sections. |
||
| Bruce Brown, PE.PhD.,
employed by Rio Tinto Technology and Innovation as Principal Advisor
Water, Waste and Tailings, was responsible for preparation of the Tailings Storage Facility
Sections. |
- 12 -
6. | RELIANCE ON SUBSECTION 7.1(2) OF NATIONAL INSTRUMENT 51-102 |
7. | OMITTED INFORMATION |
8. | EXECUTIVE OFFICER |
9. | DATE OF REPORT |
- 13 -
IVANHOE MINES LTD. |
||||
Date: October 6, 2010 | By: | /s/ Beverly A. Bartlett | ||
BEVERLY A. BARTLETT | ||||
Vice President & Corporate Secretary |