PTR MINERALS LTD — Investor Presentation 2006

Apr 30, 2006

Paralana Hot Rock Project-TA STAR DEL SE LA STAR DEL SOLO DEL SOCIALE DEL SOCIALE DEL SOCIALE DEL SOCIALE DEL SOCIALE DEL SOCIALE DEL S

petratiid Exploring for Sustainable Energy

Annual Investment in Renewable Energy

Now 4% of Global Power Capacity (excludes large hydro)

Generation Cost

CHEAP, LARGE SCALE, BASE LOAD CAPACITY

Petratherm's Commercial Strategy

The 5 Hot Rock Cost Pillars

• •Temperature
• Flow Rate
• Depth (Drill Cost)
• Location
• Plant

Shallow Hot Rocks Close to Market!

South Australian Heat Flow Anomaly

Exceptional target for Geothermal Energy

80% higher heat flow than typical Proterozic crust

Heat due to:

• Thermally Anomalous Granite (TAG)
• Radiogenic Iron Oxide (RIO)

Finding Hot Rocks

In Australia only 7% of the continent has sufficient well hole data

Forward modelling of Geothermal Resource potential based on constrained geological models

• Prediction of geothermal gradients
• Target depths
• Heat outputs $\Box$

Mt Painter Project Areas

Evidence for Thermal Anomalism

•Hot Springs

• •Fossil Hydrothermal Breccias
• •Elevated groundwater temperatures
• .High Heat flow recorded

Fossil Hydrothermal Systems

Mt Painter Projects -Thermally Anomalous Granite Model

How Hot Might Paralana Be?

Potential temperature from the modelling above = 225°C at 3.5km

September 2005 Drilling Campaign

1999 - Simon

Petratherms's Drilling Success

Temperature Gradient

Callabonna $64^{\circ}$ C at $675m = 68^{\circ}$ C/km

$58^{\circ}$ C at 485 $m = 81.5^{\circ}$ C/Km Paralana

Paralana 2 – Provisional Production Well Plan

• Shallow Depth ~3.5km
• . No Overpressuring
• Stable Formation
• Permeable / Naturally Fractured

Low-Risk and Cheap (~$3-$4 Mill)

Heat Exchanger Within Insulator (HEWI) Model

• ·Higher Permeability
• .Chemically Stable
• .No Potential Radon build up
• .Low Risk
  • = Cheaper Power!

Paralana – Power Development Program

The Paralana Resource

• Highest Recorded Temperature Gradient for Geothermal Exploration In Australia
• Thermal study indicates temperatures in Excess of 200°C at Shallow (3.5km) Depth
• Economically Extractible Resource Area > 1000km3 > 13,000MWe Resource Capacity for 20 years
• . Hot Wet Permeable Resource System = Lower risk
• Close to Market
• Renewable Energy Incentives (ie. REC's)