Investor Presentaiton
THE RESOURCE
Granite
Spa*ark Energy_5
Lemont's exceptionality largely lies in its geological attributes.
They include:-
•
•
•
Extensive 'hot' granites give rise to high surface heat flows
(upper right image).
A thick cover of insulating rocks leads to high temperatures
at depth: 200°C inferred at 5km.
Intersecting deep-rooted faults within the resource are
zones of high permeability. Their presence is supported by
extensive areas of low resistivity (main figure) defined by
geophysical (MT) surveys.
Thus Lemont is expected to meet the two essential criteria
of having useful values for both temperature and flow rate.
Independent modelling by Hot Dry Rock Pty Ltd (upper left
image) indicates a resource* with sufficient energy to run a
power plant of several hundreds of Megawatts for at least
30 years.
* The resource outline is the inferred 150°C isotherm at 4km depth
projected to the surface. The resource volume of >1000km³, was
defined using an arbitrary cut off at 5km depth but it goes much deeper.
Note that the separate zones of <1 ohm.m resistivity are enclosed by
one envelope of ~5 ohm.m. This envelope is largely within the granite,
suggesting there have been one or more significant hydrothermal events
in this region.
Unit A
PreCambrian
Mathinna
Lower Parmeener
Upper Parmeener
-Dolerite
530000
540000
650000
560000
3750
7500
11250
15000
18750
0.1
1.0
10
100
Resistivity (Q.m)
570000
1000 10000
110
-9000
-8000
-3000
Granite Roof Elevation (m a.s.l.)
Main Figure: Oblique view looking SE, showing a sliced resistivity block
model superimposed on the interpreted granite surface. Also shown are
the major structures and zones of low resistivity (<1 ohm.m: in grey
within the granite and pink above it). The thin black line is the coast and
the blue pin is a possible location for a test well into one of the low
resistivity zones within the resource outline (thick black line).
Upper Left: A 3D resource model invokes an unknown heat source (in
green) to match the observed heat flows (by Hot Dry Rock Pty Ltd).
Upper Right: Some of Australia's highest heat flows (max 118m W/m²)
were recorded over Lemont.View entire presentation