Figure 1: Location of high priority targets T1 and T2 at Alpala beneath the northwest and southeast lobes of the surface

alteration lithocap (white outline). The dashed white outlines show areas of potential target extension beyond

the core target area. Targets T3 and T4 are additional targets north of T2 and T1. The base map shows the

Orion DC Conductivity model at approximately 800m depth (~800m asl or RL). Conductive areas are coloured

purple and resistive areas are white. Targets T1 and T2 occur within strong magnetic anomalies that exhibit

conductive responses around their upper parts (due to sulphides, fracturing and/or clay alteration), and are

overlain by zones of acid alteration and geochemical anomalism.

Figure 2: View looking towards the east over the T1, T2 and T3 targets at Alpala. The magnetic model iso-surface at

0.0046 SI units (turquoise) comprises three deep magnetic apophyses that coincide with porphyry copper-gold

targets T1, T2 and T3. The T2 target at Southeast Alpala forms a distinct knoll at the southern end of a

magnetic ridge that links to the north with Target T3. The red Arrows indicate the modelled directions of the

intrusive path at T2.

Figure 3: Panel A – MVI magnetic model at 0.0046 and 0.0052 SI units (turquoise), T2 target at Southeast Alpala,

interpreted faults and location of copper sulphide occurrences mapped at surface. Panel B – As above, and

with conductivity iso-surfaces shown in red (<10 Ohm-m). Both Central Alpala and the T2 target lie along the

hanging wall (NE-side) of the NE-dipping Alpala Structural Zone. North-south cross-faults appear to control the

T2 magnetic ridge (Panel A) and its conductive cap (Panel B).

Figure 4: Collage showing association between north-south cross-faults and pathfinder element geochemistry (soil data)

over the Southeast lithocap. The Alpala Structural Zone, northeast and north-south cross-faults and the T2

target area at Southeast Alpala are illustrated. Acid-stable alteration minerals that form the lithocap include

kaolinite (Ka), dickite (Dk) and pyrophyllite (Ph).

Figure 5: East-west cross-section through Target T2 at Southeast Alpala. A magnetic apophyse ascending near the Alpala

Structural Zone (interpreted from the 0.0046 SI unit iso-surface) is capped by conductivity anomalies (red),

and underlies north-south fault-controlled zones of acid alteration and bismuth, tellurium and antimony

geochemical anomalism. The white dashed outline defines the T2 porphyry target, with a high-grade target

zone developed near the Alpala Structural Zone.

Figure 6: East-west cross-section through Target T2 at Southeast Alpala. A magnetic apophyse ascending near the Alpala

Structural Zone (interpreted from the 0.0034 SI unit iso-surface) is capped by conductivity anomalies (red),

and underlies north-south fault-controlled zones of acid alteration and bismuth, tellurium and antimony

geochemical leakage anomalism.

Figure 7: Interpreted east-west cross-section through Target T2 at Southeast Alpala. The Southeast Alpala porphyry

target is shown by the blue dashed outline. High grade targets lie close to the Alpala Structural Zone and

below the bismuth and tellurium surface anomalies.

Cornerstone Glossary

Alteration Changes in the chemical or mineralogical composition of the rock, usually produced by hydrothermal solutions or weathering

A-Vein An early generation of vein in porphyry copper deposits that form whilst the rock is extremely hot and partly ductile. Ductile deformation of the solidifying magma produces contorted and segmented (worm-like) vein textures. These are high temperature veins and can host substantial copper sulphide minerals in association with quartz.

Bornite Copper-iron sulphide (Cu5FeS4). An ore of copper occasionally associated with chalcopyrite or chalcocite. Oxidize rapidly at surface (within minutes) to a purple-blue iridescence.

B-Vein A particular generation of abundant quartz stockwork veins in porphyry copper deposits characterized by quartz fill and crack-seal textures. B-veins are often lined with copper-sulphide minerals along the centreline of the vein, and also locally along the margins of the vein.

Chalcocite Black or dark grey copper sulphide mineral (Cu2S). Chalcocite is an important ore mineral of copper, often occurring as a result of secondary enrichment (oxidation and weathering).

Chalcopyrite Brassy or golden-yellow ore mineral of copper (CuFeS2). The most common ore mineral of copper.

Chargeability The ability of earth materials to hold a charge for an extended period of time.

Conductivity The ability of a material to conduct electrical current. In isotropic material, it is the reciprocal of resistivity. Units are Siemens/m.

C-Vein A particular (abundant) generation of stockwork veins in porphyry copper deposits characterized by monomineralic sulphides. E.g. a vein comprising of only chalcopyrite, or of only bornite. C-veins generally form later than B-veins and typically cross-cut or re-open earlier B-veins.

Hydrothermal Of or pertaining to heated water, to its actions, or its products.

Induced Polarization (IP) Induced Polarization (IP) is a technique of measuring an induced potential field in the ground in order to map the geological subsurface. From measurements of the induced potential field the chargeability and resistivity of the subsurface can be calculated. These measurements are made in either the time domain or frequency domain using various configurations of transmission electrodes and multiple potentiometer receivers.

Intrusive A body of magma emplaced into a rock and then solidified upon cooling.

Isosurface A 3 dimensional surface linking all points of equal value.

Lithocap A shallow region of intense silica and clay hydrothermal alteration that commonly occurs over porphyry Cu-Au deposits

Magnetite A strongly magnetic shiny black iron-oxide mineral - (Fe,Mg)Fe2O4.

Magnetic Vector Inversion A recently developed geophysical computational technique for modelling magnetic field data.

Magnetotelluric An electromagnetic geophysical method for inferring the earth's subsurface electrical conductivity from measurements of natural geomagnetic and geoelectric field variation at the Earth's surface. Investigation depth ranges from 300m below ground by recording higher frequencies down to 10,000m or deeper with long-period soundings. Developed in the USSR and France during the 1950s, MT is now an international academic discipline and is used in exploration surveys around the world

Metallurgy The science that deals with procedures used in extracting metals from their ores and purifying

metals.

Porphyry Cu Copper orebodies that are formed from hydrothermal fluids that originate from a voluminous magma chamber several kilometres below the deposit itself. Predating or associated with those fluids are vertical dikes of porphyritic intrusive rocks from which this deposit type derives its name.

Resistivity Resistivity is an active geophysical technique that uses probes to introduce an electrical current into the ground, measuring the resistance of the rocks to the passage of an electric current.

Secondary Magnetite Magnetite formed by hydrothermal processes as opposed to primary magnetite that crystallize directly from a magma.

Sheeted Veins Vein sets where most of the veins are broadly parallel and close-spaced. These often occur in or near to fault zones.

Stockwork Veins Vein sets which have multiple orientations.