For those who believe GRK may have something up their sleeve for...

For those who believe GRK may have something up their sleeve for CKK in the future, then this announcement is very positive. CKK would be the obvious choice to drill those deep drilling sites identified.

Announcement on the 28th of March 2011:

The joint venture between Green Rock Energy and BHP Billiton Worsley Alumina Pty Ltd and
operated by Green Rock Energy is pleased to provide the following update of field activities at its
three Collie Basin/Worsley Geothermal Exploration Permits. The Permit are located about 120
kms south of Perth in Western Australia and total around 879 square kms in area. The field
activities have primarily been aimed at measuring the geothermal heat source potential within the
Permits as follows:

- A geophysical survey to measure the gravity response along 278 line kms was completed
with the objective of defining depth and thickness of potential geothermal heat sources in
the form of thermally anomalous granites. This survey was designed to follow-up
radiogenic anomalies previously mapped by the joint venture over the Permit areas by
airborne surveys.

- Temperature logging of 27 existing drill holes and water bores within the Permits between
13 metres and 291 metres depth (average depth 70 metres) was also completed in the
same month. This survey yielded an average geothermal gradient of 33?C/km which is
considered to be encouraging.

- A geochemical soil sampling survey comprising 80 sites covering 460 square kms together
with analysis of soil gas was completed to determine the concentration of naturally
occuring heat producing elements as another means of delineating regions in the Permits
with higher than normal heat content. Results showed concentrations of heat producing
elements in the soil at levels of two to four times the magnitude of the average levels
reported in earlier studies by other parties for the same elements in the Yilgarn Crust of
Western Australia.

Follow up of the geothermal soil survey is currently underway via shallow drilling to granite bedrock
at an average depth of around 25m. Together with the results of the gravity survey and further soil
gas sampling, this information will allow geothermal heat source targets to be located and
evaluated with a view to selecting sites for deep follow-up drilling.

The joint venture also commissioned an independent study by Sinclair Knight Merz of the potential
markets for geothermal energy in the Collie/Worsley region. This study should be completed
during April and will assist the joint venturers to select deep drilling sites close to potential energy
offtakers.