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GMJ: Was there a Eureka moment at Hemi but even this type of mineralisation was mentioned by
when you definitely knew you were onto De Grey as a target back in 2003.
something? If so, what led to it? The techniques that discovered Hemi were traditional,

PT: There were really a few Eureka moments rather targeting using mainly aeromagnetics, followed up
than a single one. The initial aircore results provided the by wide-spaced (640m by 160m) aircore drilling into
first excitement. These were announced on December bedrock, then RC.
17, 2019 with the first hole into Aquila (BWAC245) The important part was effective drilling – i.e. drilling
returning 43m @ 3.7 g/t (including 12m @ 9 g/t) and which got through the difficult transported cover
the first hole into Brolga (BWAC258) returning 25m @ sequence that is up to 40m thick over Hemi.
2.7 g/t. The share market obviously wasn’t so excited GMJ: Given how it has unfolded, how close
because the price went from about 4c to 4.4c on the
day of the announcement. It was just before Christmas does the Hemi story resemble your initial
expectations in January 2020?
and probably not many taking much notice.
The follow-up aircore holes into Aquila after the PT: In January 2020 we had two aircore intercepts
Christmas break confirmed the initial hit and created a 640m apart. My initial interpretation was relatively
bit more excitement. Then the first RC hole into Brolga narrow shear zones, similar to what we had hit just
(HERC001) which hit 93m @ 3.3 g/t gold (March 3) was previously at Mallina. Andy was more optimistic about
the final Eureka moment that really indicated we were the potential for wider zones across the intrusive at
onto something big but we didn’t know how big. Brolga but we only confirmed this after drilling it. We
also didn’t expect to keep finding multiple new zones –
GMJ: How much was the Hemi discovery about Crow, Falcon, Diucon, Eagle.
new, innovative approaches and how much was
about applying traditional exploration strategies? So, it ended up growing and growing, way beyond my
initial expectations, at least.
PT: The recognition of the potential for intrusion-hosted
deposits from drilling at Toweranna – part of the existing
resources on Mallina – focused the targeting on these,

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