Lihir Gold Ltd Final Results

Rio Tinto PLC 26 January 2001 The following release was announced by Lihir Gold Limited on 24 January 2001. Fourth Quarter Production and Exploration Report to 31 December 2000 HIGHLIGHTS OF THE QUARTER Production * Gold production for the Quarter was a record 191,288 ounces. * Gold production in 2000 was 606,310 ounces. * Ore milled during the Quarter (942,257 tonnes) was a record. Costs (unaudited) * Total Cash Costs for the Quarter were US$220/oz; Gross Cash Costs were US$187/oz. Total Cash Costs were relatively high due to the discovery of additional ore from West Minifie, affecting the Deferred Mining Cost allocation. * Total Cash Costs for 2000 were US$ 236/oz; Gross Cash Costs US$240/oz Hedging * An average gold price of US$379 was achieved partly due to gains made on previous hedging positions closed out and brought to account this period. * Hedging was restructured following the recent refinancing of the senior debt facility. Reserves and Exploration * 5,866 m were drilled in North and South Minifie and the Borefields. Assay results for the infill program generally were at or above expectations * Additional high grade and high sulphur ore continued to present itself in the West Minifie geothermal area of the Phase 3 pit. CEO's REVIEW Commenting on the results, the CEO, Alan Roberts said, 'The past year has been one of considerable achievement, rounded off with record production in the fourth Quarter. This very strong last Quarter meant we exceeded our annual production target of 600,000 ounces. This result was largely due to the many initiatives taken to improve process plant reliability, helped by a mine grade that was above expectations in the latter part of the year. Importantly, relining of all the autoclaves with a new design brick lining system has been extremely successful, as have projects to increase the autoclave throughput rate. Most of all, this excellent result was achieved through the grit and determination of employees and the goodwill of the local community.' ACTIVITIES REVIEW (please refer to the Attachment for the quarterly and annual production and cost data) Production Performance Variance Report Percentage Change 2000 v1999 Variance Total Material Moved 0.00 Ore Milled 17.3% Ore Milled Grade (14.6%) Gold Recovery (2.8%) Gold Produced (3.0%) The reasons for the variances were as follows: * The improvement in ore milled was a result of an increase in autoclave availability and throughput rates. In addition, an extra 5.2% was milled due to commissioning of the flotation plant early in 2000. * The reduction in ore grade in 2000 resulted from declining grade in Minifie pit, which was expected. * Gold recovery in 2000 was down due to gold losses in the flotation plant. * The reduction in gold production resulted from declining head grade, offset by improved availability and throughput rates. Mining The planned major component change out on the haul truck fleet commenced with engines and drive trains replaced on four of the haul trucks. The fourth barge returned from scheduled maintenance at the Port Moresby dockyard. The full complement of barges will now be available until mid 2003. Process Plant The operation achieved a quarterly gold production record of 191,288 ounces. Total ore milled also represented a quarterly record . A number of projects culminated in a significant improvement in grinding thickener density. Autoclave feed density for December 2000 (in excess of 50 %) was considerably greater than previously achieved. This is very important for efficient operation of the autoclaves. Recent inspections of the autoclaves during scheduled shutdowns confirmed that the new design brick linings, installed in the three autoclaves during 1999 and first half of 2000, are in excellent condition. Costs Total Cash Cost Fourth Quarter Full year 2000 2000 Gross Cash Costs US$/oz 187 240 - Deferred mining costs 48 26 - low grade stockpile (6) (13) adjustment - inventory adjustments 3 (13) - corporate expenses (12) (4) * Total cash costs 220 236 * Gold Institute Standard Gross cash costs for the quarter benefited from continuing cost reductions and high production. Total cash costs were impacted by deferred mining costs being brought to account which was the result of unscheduled volumes of high-grade and low-grade ore in Western Minifie. Gross Cash Costs in 2000 were US$16 million less than 1999 - a measure of the effectiveness of the cost reduction program and in particular the take over of mine operations from the contractor in April 2000. Health, Safety and Environment There were two lost time incidents during the quarter, giving a 12-month Lost Time Incident Frequency Rate of 0.35 per 200,000 hours (A lost time Incident is when a person cannot return to normal work duties the following shift). The Lihir operation has a three-star NOSA (National Occupational Safety Association) rating. There were no reportable environmental incidents during the Quarter. RESERVES AND EXPLORATION The drilling program concentrated on the North Minifie area (providing infill data into the planned Phase 4 North cut), the Borefields area (providing further delineation to the known mineralisation in this area) and additional geotechnical drilling around the South Minifie limits. In total, 27 holes for 5,866m were completed. Assay results for the infill program generally were at or above expectations. Results from the Borefields area have confirmed the narrow nature of the ore shoots in the area. The new information will assist more accurate interpretation and increased confidence in the orebody model. Century Resources commenced 'hot hole' drilling on the Lienetz program late in the quarter. A second rig has been mobilised to site and will commence in January 2001. This program will concentrate on infilling and extending reserves in and around the Lienetz deposit. Geothermal drilling of steam relief wells continued in the Lienetz area during the quarter. Drilling conditions were mixed, with one well abandoned but three wells completed ahead of schedule and without drilling difficulties. Production testing of the completed wells is scheduled for early 2001. In November 2000, a geothermal well was brought into production in the West Minifie area, and has produced steadily the equivalent of more than 8MW, which further enhances the potential for geothermal power production. REFINANCING The ABN-AMRO loan facility was signed on 22 November 2000. Under the new US$50 million facility, the interest rate reduced from 4.8% over LIBOR to 2.9% over LIBOR. The new loan will extend to June 2005 (instead of June 2003 under the previous facility) and will carry Lihir through the period of high stripping ratios and low grades prior to accessing the Lienetz deposit in 2004. The facility is due for repayment as follows: * 30 June 2003 US$10 million * 30 June 2004 US$10 million * 30 June 2005 US$30 million HEDGING The hedging position has been restructured following the recent refinancing of the Company's senior debt facility. The major changes made are: * Novation of the main loan forward sales and put option structure to release US$42.6m of cash by reducing the average strike price by US$103/oz on 458,035 ounces. * Conversion of 364,942 ounces of spot deferreds to forwards in December 2000 with the remaining 130,000 ounces to be converted by early February 2001. * Replacement of the collar structure with puts and forwards. * Implementation of new hedging with a total of 112,500 ounces of forward sales based off a spot of US$274 per ounce for delivery over the period March 2003 to June 2005. As at 31 December 2000 Lihir's hedge book amounted to 1,952,971 in the money ounces as shown in the following summary: Hedging Position 31/12/00 Spot Deferreds Forwards Put Options Bought Ounces Price Ounces Price Ounces Price Q1 2001 130,000 $290.47 127,419 $318.71 Q2 2001 127,522 $321.25 Q3 2001 125,282 $323.29 Q4 2001 125,282 $327.63 Total 130,000 $290.47 505,505 $322.70 0 $0.00 2001 2002 480,024 $342.68 2003 328,000 $323.66 2004 188,000 $323.52 20,000 $335.00 2005 161,441 $335.57 20,000 $335.00 2006 20,000 $335.00 20,000 $335.00 2007 20,000 $335.00 20,000 $335.00 2008 0 $0.00 40,000 $335.00 130,000 $290.47 1,702,971 $330.11 120,000 $335.00 CORPORATE As reported during the Quarter, Niugini Mining (Australia) a wholly owned subsidiary of Lihir Gold Limited, resumed control of the Red Dome mining lease in North Queensland by terminating the sale agreement. The matter is now before the Supreme Court of Queensland. OUTLOOK Lihir's production target for 2001 is 600,000 ounces. Although gold grade from Minifie will decline, mining rate is being increased from 37 to 46 million tonnes per annum with the dual objective of maintaining grade sufficient to produce more than 600,000oz in 2001 and to access the high grade Lienetz deposit earlier. As noted above, re-bricking of the autoclaves has been very successful. Also, over the past 12 months downtime for scheduled maintenance of an autoclave has been reduced from 14 to 7 days, which is world best practice. Time between shutdowns for each autoclave has been pushed out from 6 to 8 months. Consequent upon these improvements is that autoclave availability will increase in 2001. Similarly, following continuous improvements to autoclave design and feed presentation, autoclave throughput in December was almost 10% higher than the average for 2000, and planned, throughput rate. It was always recognised that sulphur grades in Minifie would decline. Sulphur is required above a threshold level to ensure efficient operation of the autoclaves. Early in 2000 a sulphur flotation plant was introduced to increase sulphur grades to the autoclaves and this initiative has been very successful. The next step to ameliorate declining grades is to recover heat from the tail end of the autoclaves and recycle it to the feed. A heat recovery plant is being engineered by Hatch and will be commissioned during 3rd Quarter 2001. We are optimistic that the plant will not only compensate sulphur levels but will give a further boost to throughput rates. Power demands have increased as a result of a deeper pit and the plant operating consistently at peak levels. A 12th power generator will be commissioned mid-year to relieve this potential constraint. The geothermal fields are capable of sustaining at least 11 MW of power. Tests are underway to investigate the feasibility of harnessing this power and, assuming they are successful, it is expected that a geothermal power unit will be readily justified in 2001. It is expected that the autoclaves will require rebricking about 2005. For three autoclaves this represents a substantial loss of availability during this period of time. In 2000, the Board authorised a feasibility study to confirm the viability of installing a 4th autoclave ahead of 2005. This study will also assess the benefit of increasing grinding and flotation capacity so that the use of available oxygen and autoclave capacity can be maximised. Downward pressure on costs will continue and it is expected further cost savings will be achieved in 2001. The main potential for cost reductions continues to be in improved mine efficiencies. The recent announcement by the PNG government that the 4% mining levy will be phased out over four years will eventually provide a benefit of about US$7 million per annum. For further information, please contact: LONDON Media Relations Investor Relations Lisa Cullimore Peter Jarvis + 44 (0) 20 7753 2305 + 44 (0) 20 7753 2401 AUSTRALIA Media Relations Investor Relations Ian Head Dave Skinner +61 (0) 3 9283 3620 +61 (0) 3 9283 3628 Daphne Morros +61 (0) 3 9283 3639 Website: www.riotinto.com Notes to Editors Rio Tinto owns 16.3 per cent of Lihir Gold Limited. Attachment to Fourth Quarter Production Report to 31 December 2000 Production and Second Third Fourth Full Full Financial Data Quarter Quarter Quarter Year Year 2000 2000 2000 1999 2000 Mine Ore mined kt 2,508 2,676 2,438(a) 2,797 10,419 6,850 Material moved kt 9,165 8,053 10,015(b) 8,882 36,115 36,355 Processing Ore milled kt 792 841 838 943 3,414 2,911 Grade gAu/t 5.27 5.64 6.37 6.63 6.01 7.04 Recovery % 90.5 92.7 91.7 91.5 91.6 94.3 Gold poured Oz 121,490 141,203 152,329 191,288 606,310 625,147 Revenue / Costs (Unaudited) Gold Sold oz 125,635 131,014 153,123 201,857 611,629 617,450 Average cash US$/oz 421 398 304 348 363 335 price received Average US$/oz 427 406 311 379 378 341 price received include deferred hedging gains Gross cash cost US$/oz 314 251 248 187 240 258 deferred (5) 16 33 48 26 (21) mining costs low grade stockpile (35) (23) (4) (6) (13) (15) adjustment (23) (10) (28) 3 (13) (3) inventory (2) - - (12) (4) (2) adjustments 250 235 249 220 236 217 corporate expenses TOTAL CASH COST (a) includes a (162)kt retrospective adjustment relating to prior quarters. (b) includes a 1,281kt retrospective material density adjustment relating to prior quarters.

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