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IGO LIMITED — Capital/Financing Update 2006
Sep 13, 2006
65111_rns_2006-09-13_0cfc8674-ad42-4f81-81f9-8f8e6d51b13c.pdf
Capital/Financing Update
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14 September 2006
Australian Stock Exchange Limited Company Announcements Level 10, 20 Bond Street SYDNEY NSW 2000
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LONG NICKEL MINE - JUNE 2006 ORE RESOURCES AND RESERVES
Highlights
- Long Nickel Mine Resources: 1,367,000t at 5.6% Ni (76,700 Ni t)
- Long Nickel Mine Reserves: 1,114,000t @ 4.2% Ni (46,800 Ni t)
- At current production rates, mine life has been extended to at least 2011
- The following recent McLeay extension drilling intercepts have yet to be incorporated into resources and reserves:
- McLeav Shoot 1: 9.0 $m \omega$ 4.6% Ni (5.0 $m$ true width) located 65 $m$ south of the current McLeay Shoot 1 ore reserve boundary and is open to the south
- McLeav Shoot 2: 16.3m @ 14.3% Ni (3.5m true width) located 150m south of the current McLeay Shoot 2 reserve boundary and is also open to the south
Drilling to define new resources and reserves south of McLeay will continue throughout 2006/7
- Intersections at the northern end of the Long South Target (0.76m @ 10.1% Ni, 3.6m $@$ 3.3% Ni and 2.45m $@$ 3.1% Ni) and a transient electromagnetic (TEM) conductor further south of these intercepts may also add to resources and reserves
- Independence has budgeted over \$6 million for 2006/7 to continue McLeay and Long South decline development and exploration drilling
Independence is pleased to announce a new JORC-compliant reserve at the Long Nickel Mine (Figure 1).

Figure 1: Long Nickel Mine - Longitudinal Projection Showing Ore Reserves, Targets and Significant Intercepts Outside Current Reserves and Resources.
To 30 June 2006, the Company had mined 27,618 tonnes of nickel metal.
The average reserve grade has increased from 3.8% Ni in June 2005 to 4.2% Ni.
The reserve nickel tonnage has decreased by 2,570t Ni (5%) between the June 2005 and June 2006 reserve estimation due to:
- 2005/6 production of 8,897t Ni with 5,536t Ni depleted from the reserve and the remaining 3,361t Ni being mined outside or in excess of 2005 reserves.
- Additional geological information from mining reducing the Victor South and $\blacksquare$ McLeay reserves by 1,200t Ni and 600t Ni respectively. This was primarily due to a better understanding of the structure and more barren porphyrys stoping out the ore than previously modelled.
- 1,200t Ni loss due to previously unknown voids in pillars and the reclassification of previous ore blocks to the unextractable category due to geotechnical or access issues
Despite these ore losses exploration during the year extended mine life from 2010 to 2011.
Recent intercepts of 9m @ 4.6% Ni and 16.3m @ 14.3% Ni south of the current McLeay resource/reserve boundary have not yet been included in the June 2006 ore resources or reserves (Figure 2). Drill-drive decline development and drilling will continue throughout 2006/7 with the aim of converting these extensions to resources and reserves.
Step-out drilling will also continue to test for extensions south of these intercepts.
Intersections at the northern end of the Long South Target (0.76m @ 10.1% Ni, 3.6m @ 3.3% Ni and 2.45m @ 3.1% Ni) and a TEM conductor further south of these intercepts, may also add to resources and reserves (Figure 3).

Figure 2: McLeay Shoots 1 and 2 Longitudinal Projection Showing Shoot Locations and New Extensions Outside Ore Reserves to the South.

Figure 3: Long South Exploration Decline Plan Showing Significant Drill-Hole Hits and Nickel % x Thickness (m) Mineralisation Envelopes and TEM Conductor, Open to the South.
| Undiluted Resources at 1% Ni Cut-off 2 as at 30 June 2005 |
Undiluted Resources at 1% Ni Cut-off 3 as at 30 June 2006 |
||||||
|---|---|---|---|---|---|---|---|
| Tonnes | Ni % | Ni Tonnes | Tonnes | Ni % | Ni Tonnes | ||
| Long Shaft | Measured | 357,000 | 7.0 | 25,000 | 268,000 | 7.1 | 19,100 |
| Indicated | 399,000 | 5.8 | 23.200 | 335,000 | 5.8 | 19,500 | |
| Inferred | 33,000 | 4.8 | 1.600 | 29,000 | 4.1 | 1,200 | |
| Sub-Total | 789,000 | 6.3 | 49,800 | 632,000 | 6.3 | 39,800 | |
| Victor South | Measured | $\mathbf{r}$ | $\cdot$ | $\blacksquare$ | $\overline{\phantom{a}}$ | $\tilde{\phantom{a}}$ | |
| Indicated | 468,000 | 4.1 | 19,300 | 422,000 | 3.8 | 16,100 | |
| Inferred | $\overline{a}$ | ٠, | $\cdot$ | ||||
| Sub-Total | 468,000 | 4.1 | 19.300 | 422,000 | 3.8 | 16,100 | |
| Victor | Measured | $\sim$ | $\overline{a}$ | $\sim$ | $\blacksquare$ | $\overline{r}$ | |
| Indicated | 3.700 | 6.1 | 200 | ||||
| inferred | ٠ | $\cdot$ | |||||
| Sub-Total | 3.700 | 6.1 | 200 | ||||
| Gibb South | Measured | 6.900 | 5.1 | 400 | $\blacksquare$ | $\blacksquare$ | $\blacksquare$ |
| Indicated | 6.500 | 3.6 | 200 | ||||
| inferred | 11.700 | 2.4 | 300 | ||||
| Sub-Total | 25,100 | 3.5 | 900 | ٠ | $\overline{r}$ | ||
| Mei.eav | Measured | $\sim$ | ÷. | $\sim$ | $\tilde{\phantom{a}}$ | $\overline{\phantom{a}}$ | ۰ |
| Indicated | 140.000 | 7.0 | 9,800 | 212,000 | 7.4 | 15,600 | |
| Inferred | 54,000 | 6.0 | 3.200 | 101,000 | 5.1 | 5,200 | |
| Sub-Total | 194,000 | 6.7 | 13,000 | 313,000 | 6.6 | 20,800 | |
| TOTAL | 1,479,800 | 5.6 | 83,200 | 1,367,000 | 5.6 | 76,700 |
Table 1: Long Nickel Mine - Ore Resources - Comparison 2005 to 2006
Table 2: Long Nickel Mine - Ore Reserves - Comparison 2005 to 2006
| Mining Reserve at 2.5% Ni Cut-off as at 30 June 2005 2 |
Mining Reserve at 2.5% Ni Cut-off as at 30 June 2006 2 |
||||||
|---|---|---|---|---|---|---|---|
| Tonnes | Ni % | Ni Tonnes | Tonnes | Ni % | Ni Tonnes | ||
| Long 12-161. | Proven | 339,000 | 4.1 | 13,500 | 208,000 | 4.7 | 9,800 |
| mechanised | Probable | 180,000 | 3.3 | 5.700 | 170,000 | 3.6 | 6,100 |
| Sub-Total | 519,000 | 3.8 | 19.200 | 378,000 | 4.2 | 15,900 | |
| Long 7-11L | Proven | 27.000 | 3.7 | 1.000 | 32,000 | 3.4 | 1,100 |
| hand-held | Probable | 115,000 | 4.5 | 5.100 | 129,000 | 4.3 | 5,500 |
| Sub-Total | 142,000 | 4.4 | 6.100 | 161,000 | 4.1 | 6,600 | |
| Victor South | Proven | $\overline{\phantom{a}}$ | $\overline{\phantom{a}}$ | $\sim$ | |||
| mechanised | Probable | 428,000 | 3.6 | 15,600 | 260,000 | 4.3 | 11.100 |
| Sub-Total | 428,000 | 3.6 | 15,600 | 260,000 | 4.3 | 11,100 | |
| Victor | Proven | ٠ | $\overline{\phantom{a}}$ | $\sim$ | |||
| mechanised | Probable | 6.000 | 3.4 | 200 | |||
| Sub-Total | 6.000 | 3.4 | 200 | ||||
| Gibb South | Proven | 4,300 | 3.2 | 140 | |||
| hand-held | Probable | 600 | 2.8 | 20 | |||
| Sub-Total | 4.900 | 3.2 | 160 | ||||
| Mel.eav | Proven | ٠ | $\sim$ | ٠ | |||
| mechanised | Probable | 183.600 | 4.4 | 8.110 | 315,000 | 4.2 | 13,200 |
| Sub-Total | 183,600 | 4.4 | 8,110 4 | 315,000 | 4.2 | 13.200 | |
| TOTAL | 1,283,500 | 3.8 | 49,370 | 1,114,000 | 4.2 | 46,800 |
Notes:
The Competent Persons and Members of the AusIMM or AIG with the appropriate experience in reporting the above are Brett Hartmann and Ian
Taylor of Lightning Nickel Pty Ltd and Mark Zammit of Cube Consulting Pty Ltd. Phil B figures.
Ore tonnes have been rounded to the nearest thousand tonnes and nickel tonnes have been rounded to the nearest hundred tonnes.
$\mathbf{R}$ The cut-off grade used for the Victor South resource is 0.6% Ni.
Reserves Broken Down by Mining Method
Reserves broken down by mining method are as follows:
| Mining Method | Ni Tonnes |
|---|---|
| Mechanised flat back | 12.400 |
| Mechanised long-hole | 22.800 |
| Mechanised room and pillar | -600 |
| Air-leg | 11.000 |
| TOTAL | 46.800 |
Resource and Reserve Estimation
Resource and reserve estimation methodology is detailed in Appendix 1.
Approximately 29,900 resource tonnes of nickel remain in the Long Mine outside current reserves.
The Company has budgeted over \$6 million in 2006/7 to continue Long, Long South and McLeay exploration decline development and drilling with the aim of increasing the reserve base.
Church D
Christopher Bonwick Managing Director
Note: The information in this report that relates to Exploration Results, Mineral Resources or Ore Reserves is based on information compiled by Mr Christopher M Bonwick who is a full-time employee of the Company and is a member of the Australasian Institute of Mining and Metallurgy. Christopher Bonwick has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2004 Edition of the 'Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves'. Christopher Bonwick consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
Forward-Looking Statements: This document may include forward-looking statements. Forward-looking statements include, but are not limited to, statements concerning Independence Group NL's planned exploration program and other statements that are not historical facts. When used in this document, the words such as "could," "plan," "estimate," "expect," "intend," "may," "potential," "should," and similar expressions are forward-looking statements. Although Independence Group NL believes that its expectations reflected in these forward-looking statements are reasonable, such statements involve risks and uncertainties and no assurance can be given that actual results will be consistent with these forward-looking statements.
| Board of Directors Rod Marston Chris Bonwick Kelly Ross John Christie Oscar Aamodt |
Non-Executive Chairman Managing Director Executive Director Non-Executive Director Non-Executive Director |
Stock Exchange Listing Australian Stock Exchange ASX Code: IGO Capital Structure Ordinary Shares |
112,833,607 |
|---|---|---|---|
| Contact Address: Telephone: Facsimile: Email: Website: |
PO Box 893 South Perth, WA, 6951 $(08)$ 9367-2755 $(08)$ 9367-3288 [email protected] www.igo.com.au |
Unlisted Options Various Expiry Dates |
4,484,350 |
| Share Registry Security Transfer Registrars Pty Ltd 770 Canning Highway Applecross, WA 6153 Telephone: Facsimile: |
$(08)$ 9315-0933 (08) 9315-2233 |
Substantial Shareholders MIR Investment Management Barclays Global Investors Australia |
7.24% 5.27% |
Appendix I
June 2006 Resource Estimation Parameters
The resource was estimated using 2D and 3D metal accumulation of grade, thickness and density interpolated by kriging.
Data
The following geological information and data were incorporated into the estimation process:
- Drill-hole data $\bullet$
- Ore and porphyry intrusive (barren) locations defined by underground mapping and drilling
- Survey pick up of mining depletion boundaries $\bullet$
- X-Pillar outlines (non-recoverable) $\bullet$
Cut-offs, Modelling Technique and Cell Size
| $-613302$ | Andrew South | McLeav | |
|---|---|---|---|
| Lower cut offs | 1.0% Ni | $0.6\%$ Ni | 1.0% Ni |
| Modelling technique | 2D longitudinal kriging | $01, 04$ Surfaces $-3D$ ordinary block kriging 02 Surface - horizontal 2D planar kriging. |
Horizontal 2D planar kriging, |
| Parent cells | $10mN \times 8m$ RL | 10mN x 4mE x 4mRL | $10mN \times 4mE \times 4mRL$ |
| Block discretisation points (metres) |
2D interpolation - $5 \times 5 \times$ 1 (XYZ) |
3D interpolation - $4 \times 5$ x 2 (XYZ) 2D interpolation $-5 \times 5$ $x + (XYZ)$ |
2D interpolation - $5 \times 5$ $x + (XYZ)$ |
Mining Depletion, Pillars and Porphyry Intrusives
| Mining depletion | i. | Depletion areas were stamped into each mineralised surface of Long using 2D string outlines. Depletions areas in Victor South and Meleay were constrained by 3D survey pickups of the mined areas. |
|---|---|---|
| X-Pillar (non-recoverable) | ٠ | X-Pillars were stamped into each mineralised surface using 2D string outlines. |
| Porphyry Intrusives | $\blacksquare$ | Porphyry intrusion wire frames $(0.01\% \text{ Ni}, 2.7t/\text{m}^3)$ were used to constrain the porphyry interpretation within the ore models. |
June 2006 Reserve Estimation Parameters
The reserve was estimated using stoping wire frames overlaid on resource block models.
recoveries.
Reserve estimation parameters are as follows:
| Nickel metal price | $\mathbf{m}$ . $\mathbf{m}$ | AUS \$15,700t Ni (in-house estimate) |
|---|---|---|
| Grade cut-off | $\sim$ 2.5% Ni lower cut | |
| This cut-off has been used as an average for a combination of stoping | ||
| methods and includes all operating costs and expected nickel |
| Extractions and dilution factors: | Extraction | Dilution |
|---|---|---|
| Long-hole stopes | 95% | 25% |
| Flat-back stope | 100% | 5% |
| Room and pillar stopes | 80% | 5% |
| Air-Leg slotting | 90% | 5% |
| Geotechnical loss | $\blacksquare$ remnant nature of the reserves in this area. |
$1.3\%$ subtracted from reserves in the Long deposit to represent the |
Stopes were designed in 3 dimensions using the above inputs and Method $\overline{a}$ resource block models. Final reserves were estimated after the subtraction of porphyry, unextractable X-Pillars and mining depletion.