Work undertaken by Pearl Gull Iron at Cockatoo Island has identified the potential for high-grade structural repeats on the northern side of the island. The shallowest structural position of the prospective horizon repeating is in the northeast part of the Pearl Gull Iron’s tenure, and it is this area that will be the focus of initial exploration work. There are several areas of outcropping high-grade haematite which support this interpretation. This type of repeat is present at the nearby Koolan Island (owned by Mount Gibson Iron Ltd) with Acacia, Barramundi, Eastern and Mullet pits in the central and northern parts of that island along strike equivalent positions of the stratigraphy that Pearl Gull Iron is targeting at Cockatoo Island.
In 2019 Pearl Gull Iron secured imaging at low tide, which shows a beach deposit of winnowed iron mineralisation, and minor outcropping iron mineralisation. A similar accumulation occurs on the southern side of the Island at East Beach. Material at that location has historically been a source of high grade detrital fines that have been shipped.
Pearl Gull Iron subsequently investigated the outcrops and at low tide and confirmed in-situ, outcropping and sub-cropping, +60% Fe (confirmed via pXRF methods).
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High grade haematite mineralisation can be observed on Pearl Gull’s Mining Lease, along strike from the historical Seawall mine in an area the Company has called Switch Pit. An exploration drilling program has commenced in this area.
The Magazine Pit area is located in the southeast part of the tenement package and exploration in this area will target medium grade haematite suitable for beneficiation, as was undertaken previously on the island.
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