Aditya Birla Minerals Limited

ASX RELEASE

Mineral Resource at 31st March 2013

2nd May 2013

Aditya Birla Minerals Limited Sunil Kulwal – Managing Director

Shanti Dugar – Chief Financial Officer

Peter Torre-Company Secretary Telephone +61 8 9366 8800

Facsimile: +61 8 9366 8805

Email: investorrelations@adityabirla.com.au

For Further Information

Aditya Birla Minerals Limited ABN 37 103 515 037 Level 3 256 Adelaide Terrace Septimus Roe Square Perth Western Australia 6000 Australia PO Box 3074 Adelaide Terrace Perth Western Australia 6832 Australia T: +61 8 9366 8800 F: +61 8 9366 8805 www.adityabirlaminerals.com.au

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June Quarter 2006 Review

ADITYA BIRLA MINERALS LIMITED Mineral Resource Update

31 March 2013

• Aditya Birla Minerals (ASX – ABY) (“Aditya Birla” or “The Company”) is pleased to announce an updated in-situ Mineral Resource for all the Copper Operations as at 31/03/2013 now totaling 248.40Mt @ 1.34% Cu for 3.32Mt of contained copper.

• This represents a 38% increase in contained copper over that of 31st March 2012 as reported in the ASX release dated 29th May 2012.

• The in-situ Sulphide Mineral Resource for the Nifty Copper Operations at 31/03/2013 totals 30.6Mt @ 2.5% Cu above a reporting cut-off of 1.2% Cu.

• The in-situ Mineral Resource for the Mt Gordon Copper Operations at 31/03/2013 totals 164.2Mt @ 1.25% Cu above a reporting cut-off of 0.5% Cu.

• The in-situ Oxide and Supergene Mineral Resource for the Maroochydore Copper project at 31/03/2013 totals 43.10Mt @ 0.91% Cu and 388ppm Co above a reporting cut-off of 0.5% Cu.

The “in-situ Sulphide” Mineral Resource total has been adjusted for model updates and mining during the period subsequent to the previous annual report.

Changes on the in-situ Sulphide Mineral Resource since the last annual reporting for the Nifty Copper Operations include: -

Updates to the Sulphide Mineral Resource model for Nifty to include additional drilling information.

Highlights

Nifty Mineral Resource

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changes to Resource classification to better reflect production results

Allowance for the full year production from the underground mine.

The Nifty Mineral Resource was updated using all appropriate information as at 31 March 2013 by Mr Peter Ball of DataGeo Geological Consultants (Ball or DataGeo) an independent geological consultant and Sean Sivasamy (Sivasamy) of Aditya Birla Minerals Ltd. New information came from a total of forty four (44) drill holes, comprising forty one (41) holes from underground and three (3) holes from surface.

Production during the previous twelve months was depleted from the updated Sulphide Mineral Resource Model and the Nifty Sulphide Resource is now reported as 30.6Mt @ 2.5% Cu above a 1.2% Cu cut-off grade. The depletion work was carried out by Sivasamy of Aditya Birla Minerals Ltd. The Sulphide Mineral Resource above 1.2 % Cu is shown in Table 1.

A substantial underground drilling program commenced in May 2013 with one underground rig further delineating both the Northern Limb and Southern Limb Extension of the resource areas. The new drilling information will be incorporated into a new geological model for the next resource update.

Figure 1: Nifty Total Mineral Resource Increase 2012-2013

 -­‐        

 5.0    

 10.0    

 15.0    

 20.0    

 25.0    

 30.0    

 35.0    

 40.0    

 45.0    

As  on  31st  Mar'12   New  Addi8on  FY  12-­‐13  

Deple8on  FY  12-­‐13   As  on  31st  Mar'13  

41.0Mt @ 2.14% 41.10Mt @ 2.14% -2.3Mt 2.4Mt

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The in-situ Mineral Resource for the Mt Gordon Copper Operations at 31/03/2012 totals 164.25Mt @ 1.25% Cu, above a reporting cut-off of 0.5% Cu.

The Mt Gordon Mineral Resource includes individual estimates for Mammoth/Mammoth Surround/Mammoth Deeps/Esperanza South/Esperanza-Pluto Deposits (DataGeo) and a Maiden Resource estimate for the Greenstone and Mammoth North Deposits (Sivasamy) using all information as at 31 March 2013.

These estimations comply with the requirements of the 2004 JORC Code for the estimation of Mineral Resources.

Changes on the in-situ Mt Gordon Mineral Resource since the last resource update in September 2012 for the Mt Gordon Copper Operations include:

Updates to the Mineral Resource model for Mammoth and Esperanza South to include additional drilling information.

Review and estimation of the area surrounding the Mammoth deposit from surface around the old underground workings

Review and estimation of the Mammoth Deeps a location immediately down plunge of the Mammoth Deposit

Allowance for the full year production from the Mammoth underground mine.

Production during the previous six months was depleted from the new Mammoth Mineral Resource. The depletion work was undertaken by Ball and Sivasamy. The Mineral Resource above 0.50% Cu is shown in Table 2.

A substantial surface and underground drilling program commenced in April 2013 with one surface and two underground diamond drill rigs for further resource extensions of the Mt Gordon Deposits. The new drilling information will be available for incorporation into a new geological model for the next Mineral Resource update.

Mt Gordon Mineral Resource

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Figure 2: Mt Gordon Total Mineral Resource Increase 2012-13

The in-situ Oxide and Supergene Mineral Resource for the Maroochydore Project, as estimated at 31 March 2013 by DataGeo, is 43.1Mt @ 0.91% Cu and 391 ppm Co, above a 0.5% Cu cut-off. In 2012-13 surface diamond drilling was completed at the Sulphide Prospect extension. The new drilling information will be incorporated into the geological model for the next resource update. The Mineral Resource above 0.50 % Cu is shown Table 3.

An aggressive pre-collared diamond drilling programme is planned for the current year which will target the potential for copper sulphide mineral resources beneath and adjacent to the Maroochydore oxide resource.

Maroochydore Mineral Resource

 -­‐        

 20.0    

 40.0    

 60.0    

 80.0    

 100.0    

 120.0    

 140.0    

 160.0    

 180.0    

As  on  31st  Mar'12   New  Addi8on   Deple8on   As  on  31st  Mar  '13  

97.2Mt @ 1.35%

164.2Mt @ 1.25% 68.1Mt

-1.1Mt

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The table below summarise all mineral resources as at 31 March 2013.

*Recoverable copper in the inventory under leach is additional to measured mineral resources.

Figure 3: ABML Total Mineral Resource Increase 2012-2013

 -­‐        

 50.0    

 100.0    

 150.0    

 200.0    

 250.0    

 300.0    

As  on  31st  Mar'12   New  Addi8on   Deple8on   As  on  31st  Mar  '13  

158.9Mt @ 1.5%

248.4Mt @ 1.34% 89.5Mt

-3.4Mt

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Competent Person Statement:

The information in this table which relates to Mineral Resources for the Nifty and Mt Gordon operations is based on and accurately reflects reports prepared by DataGeo and Sivasamy in 2013. The information in this report which Relates to Mineral Resources for the Maroochydore project is based on and accurately reflects reports prepared by DataGeo in 2013.

Mr Ball and Mr Sivasamy have the necessary experience relevant to the style of mineralisation, the type of deposit and the activity undertaken to qualify as a ‘Competent Person’ under the JORC Code for Reporting of Mineral Resources and Ore Reserves (2004 Edition). Mr Ball and Mr Sivasamy have given their consent to the inclusion of the material in the form and context in which it appears. Mr Ball is Principal of DataGeo Geological Consultant (an independent geological consultancy). Mr Sivasamy is a full time employee of Aditya Birla Minerals Limited.

The Mt Gordon mineral resource cut-off grade has been lowered based on the outcome of an analysis undertaken by AMC Consultants Pty Ltd in association with a pre-feasibility study for Mt Gordon. The analysis indicated that there are reasonable prospects of eventual economic extraction of material above a 0.5% Cu cut-off grade, based on a bulk underground mining method assuming no backfill.

The Measured and Indicated Mineral Resources tabled above are inclusive of those Mineral Resources modified to produce the Ore Reserve. In all Resources and Reserves tables, significant figures do not imply precision. Figures are rounded according to JORC Code guidelines.

The depletion of the Mineral Resources for the Nifty and Mt Gordon operations for the 2013 reporting is based on and accurately reflects information prepared by Mr Peter Ball and Mr Sivasamy. Mr Ball is a member of the AusIMM (CP-Geo) and Mr Sivasamy is a Member of the AusIMM. Mr Ball and Mr Sivasamy have the qualifications and necessary experience with this style of mineralisation to qualify as a competent person as described by the 2004 JORC Code for reporting of Mineral Resources and Ore Reserves. Mr Ball and Mr Sivasamy have given their consent to the inclusion of the material in the form and context in which it appears.

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Appendix 1 Mammoth Surrounds Mineral Estimate

The Mammoth Surrounds Mineral Resource was estimated using: -

• A mineralisation constraint based on a 0.5% Cu external boundary and position bounded by the Portal, Mammoth and Mammoth Extended Faults to the east, south and north respectively and the Unconformable surface to the west.

• Drill holes intersecting the constraint were composited to 1.5m down hole.

• Grade statistics and continuity were assessed using the composites

• The mineralisation constraints were loaded into a block model with block sizes appropriate to the drill hole spacing and the constraint dimensions.

• Grade was estimated using Ordinary Kriging using variography established by sub-domains these being sub-parallel to the Portal Fault and sub-parallel to the Mammoth Fault.

• Specific gravity was assigned to the blocks based on elevation with defaults taken from the Mammoth and Portal Trend domains

• The model was validated by comparison to the input data and classified according to appropriate criteria relating to confidence in the input data, the position of the input data and the statistical results of the estimation.

• The estimate was depleted against a solid representing all previous underground mining.

The estimation complies with the requirements of the 2004 JORC Code for the estimation of mineral resources.

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Appendix 2 Mammoth Deeps Mineral Estimate

The Mammoth Deeps Mineral Resource was estimated using: -

• A mineralisation constraint based on a 0.5% Cu external boundary and the extension of the Mammoth Trend down plunge to the extent of drilling or the position of the Mammoth Fault.

• Drill holes intersecting the constraint were composited to 1.0m down hole.

• Grade statistics and continuity were assessed/reviewed using the composites

• The mineralisation constraints were loaded into a block model with block sizes appropriate to the drill hole spacing and the constraint dimensions.

• Grade was estimated using Inverse Distance to the power of 2 given the small number of data point and the lack of an individual continuity model.

• Specific gravity was assigned to the blocks based on elevation with default values taken neighbouring locations

• The model was validated by comparison to the input data and classified according to appropriate criteria relating to confidence in the input data, the position of the input data and the statistical results of the estimation.

The estimation complies with the requirements of the 2004 JORC Code for the estimation of mineral resources.

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