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Location: 81 km N from Laverton, Western Australia, Australia
Level 2, 516 Hay StreetP.O. Box 862, WA 6904PerthWestern Australia, Australia6008
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Garden Well is located on the eastern limb of the Erlistoun syncline of the Duketon Greenstone Belt. The gold of the Garden Well Deposit occurs as supergene mineralisation within upper Archaean regolith and as hypogene mineralisation in fresh rock. No significant amounts of gold occur in the transported quaternary clay sequence. The gold is associated with intensely sheared and folded ultramafic and shale units that have been hydrothermally altered to a silica-carbonate-fuchsite-chlorite-pyrite-arsenopyrite assemblage, and underlying chert units.The gold mineralisation trends roughly north-south over a distance of 2,100m and dips 50º to 60º east which is sub-parallel to the ultramafic-sediment contact.The approximate dimensions of the underground deposit are 1,600m along strike (N-S), 100m across strike (E-W), and 800m depth from 2,500mRL to 1,700mRL.Garden Well SouthThe geology of Garden Well South (GWS) UG consists of a sequence of folded sedimentary and volcanic rocks. The sequence can be differentiated into fine grained siltstones, lapilli and tuff volcaniclastics, sedimentary breccias, black shales, banded iron formation, chert, interbedded chert/shale and a footwall basalt unit. All of the units strike NNW at approximately 340-350o. Folding is tight and plunges approximately 20o to the SSE.Primary mineralisation is present as pyrite beds and veinlets within the western limb of the syncline, hosted by siderite-altered chert. Mineralisation at GDW is strongly controlled by lithological rock type.The maiden GWS UG MRE is estimated from the initial target zone at GWS and extends over 700m down plunge to a depth of 500 meters below natural surface.Gold is hosted in a moderate east to steeply dipping shear zone trending N-S. Gold mineralisation within chert, shale and BIF is associated with brecciated zones including elevated sulphides and quartz veins.Garden Well MainThe geology of Garden Well Main underground consists of a sequence of folded sedimentary and volcanic rocks. The sequence can be differentiated into fine grained siltstones, lapilli and tuff volcaniclastics, sedimentary breccias, black shales, banded iron formation, chert, interbedded chert/shale and a footwall basalt unit. All the units strike NNW at approximately 340-350o . Folding is tight and plunges approximately 20o to the SSE. Primary mineralisation is present as pyrite beds and veinlets within the western limb of the syncline, hosted by sideritealtered chert.
