BLACK ROCK MINING LIMITED — Capital/Financing Update 2013

Aug 18, 2013

ASX Announcement

19 August 2013

(ASX. GRK)

WITHDRAWAL FROM COOLCALALAYA SPA 33

Green Rock Energy Ltd (ASX:GRK and GRKOB) gives notice that it has withdrawn from its agreement with Palatine Energy Pty Ltd (“Palatine”) over SPA 33 to acquire a 50% interest.

Following Green Rock’s review of its objectives, the company agreed that it focus on its current initiatives to acquire a 100% interest in the L12-7 Perth Basin project and further progress the AWE agreement for geothermal power generation in the North Peth Basin in the Mid West of WA.

The terms of the agreement with Palatine is that in exchange for Palatine releasing Green Rock from its work programme commitments including Green Rock’s funding of 100% of the geophysical survey over SPA 33 (now granted to Palatine as SPA 9 AO), Palatine is to receive 30,000,000 GRK shares. 15m of the 30m shares are subject to a 3 month voluntary escrow.

It is estimated that this full and final settlement will alleviate Green Rock of a minimum of $200,000 in estimated costs.

Richard Beresford Chairman

Investors and Media T: +61 (08) 9482 0482 E: info@greenrock.com.au

About Green Rock Energy Limited

• A 100% interest in the L12-7 area in the Perth basin, subject to the successful completion of Native Title negotiations.

• MoU with AWE to demonstrate the development potential of geothermal power generation in hot sedimentary

• Attachments aquifers in the north Perth Basin in the Mid West of WA  An alliance with leading Australian renewable power developer Pacific Hydro for conventional geothermal power generation in GRK’s permits in the Mid West of WA and GRK’s and Pacific Hydro’s licences in the Great Artesian Basin in SA

• A joint venture with MOL in Hungary for geothermal power generation (GRK 50%)