SIGNIFICANT GOLD POTENTIAL AT RAHU HIGHLIGHTS
• Survey shows gold mineralisation potential similar to Karangahake deposit
• Improves targeting for future deep drilling programme
• Important development of Heritage’s current geological model
KARANGAHAKE GOLD PROJECT – Coromandel, NZ (Heritage 100%)
Rahu
The results of a new geophysical survey of the Rahu gold prospect show that wide low to moderate grade gold zones appear
to narrow at depth to what may be higher grade mineralised feeder zones, hosting similar bonanza grades to those
encountered during mining at the nearby Karangahake deposit. Heritage Gold managing director Peter Atkinson says it has
received and interpreted the results of a Controlled-Source Audio-frequency Magneto-Tellurics (CSAMT) survey, conducted by the University of Auckland. CSAMT is a sophisticated geophysical technique used to
determine the electrical resistance of the ground to about 300 metres (m) depth.
Interpretation of the CSAMT profiles shows that wide silicified breccia zones of relatively low to moderate gold grade
near the surface appear to narrow to what may represent higher grade mineralised feeder zones at depths of around 300 m
below the surface at Rahu (Figures 2 & 3).
“This reinforces our existing geological model for Rahu and increases the validity of targeting these geophysical
anomalies with deeper drilling for the discovery of higher grades,” Atkinson says. “This is a significant step for
Heritage Gold in recognising and evaluating Rahu’s potential.” The Rahu permit (EP 40-117) lies immediately to the north
of the Talisman mining permit (MP 51- 326) and on the same line of strike as the gold bearing veins at Karangahake
(Figure 1). Structurally, Rahu is believed to have been downthrown, relative to the neighbouring Karangahake gold
deposit, supporting the potential for high grades at depth similar to the bonanza gold grades (typically >31
grams/tonne) at Karangahake.
Rahu’s two kilometre-long zone of coincident geochemical and geophysical anomalies is interpreted to have similar
mineralisation potential to Karangahake.
Heritage Gold's previous angled drilling intersected anomalous gold (Au) and silver (Ag) at shallow depths in several
holes: