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Location: 94 km SE from Port Hedland, Western Australia, Australia
Suite 12, Level 1 / 100 Railway RdDaglishWestern Australia, Australia6008
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The Mt York Gold Project Mineral Resource Estimate (MRE) includes the Main Trend (Main Hill, Breccia Hill and Gossan Hill) and two satellite deposits called Iron Stirrup and Old Faithful situated some 5 and 7 km NNE of Main Trend respectively. The 2024 Scoping Study is based on mining and processing mineralisation from the 3km-long Main Trend deposit.The Mt York gold project is situated within the East Strelley greenstone belt and overlying Gorge Creek group sedimentary sequences. The East Strelley greenstone belt consists of steeply dipping and tightly folded basalt, ultramafic, felsic volcanics and cherts. The overlying overlying Gorge Creek group consists of medium to coarse-grained clastic sediments and schists. The sequence has been metamorphosed to lower amphibolite facies.The Mt York gold deposit is located within a banded iron formation (BIF) situated on the contact between the underlying greenstones and the overlying sedimentary sequence. The BIF has been metamorphosed to amphibolite facies, with abundant magnetite and iron-rich grunerite amphiboles forming the dominant mineralogy. The grunerite can be observed forming a reasction front with both the magnetite bands and more siliceous bands giving the BIF a distinctive laminated appearance. More chert-rich, siltstone, and shale horizons can often be noted towards the lower contact with the underlying mafic rocks. The BIF varies from 20m to approximately 180m in true thickness where it is exposed at surface and periodically displays evidence of tight folding of the laminations. The BIF is immediately underlain by variably foliated basalt and amphibolite. The immediate hangingwall to the BIF consists of flattened quartz pebble conglomerates grading up to medium and coarse-grained sandstones and aluminosilcate schists.The Mt York BIF has a general NW to E-W strike and dips between 45 and 85 degrees to the south and south west. The sequence is situated on the southwest dipping limb of a regional fold and the sequence has been deformed by subsequent local folding causing a gentle warping of the BIF and moderate changes in geometry.Mineralisation at Main Trend occurs in fresh rock in the form of pyrrhotite and arsenopyrite sulphides that often occur in close proximity to zones of both folding and shearing deformation. Higher grade zones generally have an increase in arsenopyrite content.Within the weathered zone the mineralisation takes the form of silica and iron-rich gossanous material and clays, with significant topographic expression caused by the highly resistive nature of the gossan cap. Outcrops of gossanous mineralisation occur at surface along the length of the deposit.Mineralisation within the BIF extends over a strike length of 3km and at least 350m below surface parallel to the BIF host rock. Mineralisation remains open at depth and along strike to the northwest. The southeast extent of the deposit demonstrates a rapid thinning of the BIF sequence attributed to structural thining from NNW trending faults.The Mt York main trend geology comprises (from NE to SW) – felsic volcanics and cherts, mafic-ultramafic volcanics and amphibolite, banded iron formation (BIF), and fine to coarse-grained sediments.The sequence has been metamorphosed to amphibolite facies and has been broadly folded. The dominat mineralogy of the BIF consist of magnetite and Fe-rich grunerite amphibole.Gold mineraliation is hosted primarily within the BIF sequence, and is associated with weak to strongly disseminated arsenopyrite and disseminated to massive pyrrhotite associated with visible folding and deformation of the BIF layering.DimensionsThe Mt York - Main Trend gold deposit consists of approximately 3.5km of strike length with mineralisation extending from 250RL to -250m and is open at depth.The Iron Stirrup gold deposit is approximately 800m of strike length with mineralisation extending from 230RL to -100m and is open at depth.The Old Faithful deposit is -1.0km of strike length (striking at 010) with mineralisation extending from 226RL to -20m.
