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Location: 80 km NE from Albany, Western Australia, Australia
31 Albany Highway AlbanyAlbanyWestern Australia, Australia6330
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The Southdown Project lies within the Albany-Fraser Orogen, a high-grade metamorphic belt formed during the Mesoproterozoic because of the convergence of the Western Australian and Mawson Cratons. The host rocks are highly deformed granulite facies orthogneiss of the Dalyup Gneiss from the Biranup Zone of the Kepa Kurl Booya Province.The Southdown Magnetite Deposit comprises an east-west striking zone of quartz-magnetite gneiss and granulite, hosted by a quartz-biotite dominant metasedimentary gneiss and migmatite assemblage. Aeromagnetic data and drilling confirm that the magnetite mineralisation has a strike length of approximately 12 km and dips at 60 to 65 degrees to the south. A low intensity magnetic anomaly extends a further 7 km to the east for a total length of 19km.The deposit occupies the core of a gently east plunging, overturned tight isoclinal syncline with a steeply south dipping axial surface. The deposit is offset by moderately northeast dipping dextral reverse faults and subsidiary steeply southeast dipping sinistral faults. The magnetite mineralisation is poorly exposed but forms a low east west trending ridge which is more prominent in the western half of the deposit but largely buried beneath 20-80m of Pallinup FM sands/silts. The magnetite mineralisation outcrops in only a few locations within the western portion of the deposit.The currently defined Resource extends over 11 kilometres of strike, with variable depths ranging from 50 metres below surface in the west to 555 metres below surface in the east.DimensionsThe Southdown mineralisation is divided into 4 zones by faults offsetting the stratigraphy; mineralisation would otherwise be continuous over the full strike extent. Being hosted in a synformal structure, the depth extent is reasonably well defined by the fold hinge.Western Zone• Strike Extent: 2,200 m;• Width Extent: 100 m;• Depth Extent: 480 m.Central Zone• Strike Extent: 1,200 m;• Width Extent: 100 m;• Depth Extent: 450 m.Eastern Zone• Strike Extent: 2,000 m;• Width Extent: 100 m;• Depth Extent: 520 m.Far Eastern Zone• Strike Extent: 5,700 m;• Width Extent: 100 m;• Depth Extent: 570 m.
