Wanderrie: Supergroup Trend – Milestone 3
Southern Yamarna area showing priority exploration areas in relation to Attila-Alaric and Supergroup Trend Projects. Note extensive zone of continuous gold mineralisation in multiple locations, and lack of drilling between Smokebush and Supergroup Trend.
The Wanderrie Camp is situated in the central part of the Yamarna Project, approximately 15 kilometres north of Smokebush. Previous exploration has defined the Supergroup Trend at Wanderrie as a continuous 14-kilometre-long mineralised corridor comprising mafic and volcanic units hosting multiple sub-parallel mineralised shear zones. Located along the western edge of the Wanderrie Camp, the Supergroup Trend is interpreted to represent the southern continuation of the Attila-Alaric Trend (hosting 596,000 ounces of gold in Mineral Resources), and continues over 30 kilometres further south to the Yaffler and Toppin Hill Prospects in the Southern Yamarna area. The Supergroup Trend hosts the Santana, Satriani, Gilmour and Morello Prospects, with mineralisation typically manifested in localised shear zones at discrete stratigraphic contacts. Gold mineralisation is present as a vein-poor, biotite-chlorite-sericite-albite altered shears with prominent pyrite ± pyrrhotite ± arsenopyrite.
The Gilmour-Morello Prospects were subject to detailed aircore drilling (200 by 100 metre spacing with 50 metre infill) through 2016 and 2017 which identified coherent gold anomalism over the southern 4.5 kilometres strike of the Supergroup Trend. This was followed by two phases of widely spaced RC drilling in 2017 confirming bedrock gold mineralisation in several locations, with a best intersection of 5 metres at 12.52 g/t Au (17WDRC0057) highlighting the potential for high grade mineralisation in the area.
A new drilling programme comprising 4 diamond holes (898.70 metres) and 25 RC holes (5,270 metres) aimed to infill the bedrock mineralisation confirmed in 2017 to a 200 metre line spacing. Drilling was completed in April 2018 with assays returned for one diamond hole (202.21 metres) and 22 RC holes (4,490 metres) at the Gilmour, Morello, and Satriani Prospects confirming consistent and continuous narrow zones of moderate to high-grade gold mineralisation associated with multiple shear zones parallel to geology and stratigraphic contacts consistent with previous interpretations. Best intersections included:
- 2 metres at 17.45 g/t Au from 80 metres (18WDRC0149)
- 1 metre at 17.27 g/t Au from 134 metres and 5 metres at 4.50 g/t Au from 140.0 metres (18WDRC0157)
- 5 metres at 3.63 g/t Au from 85 metres and 2 metres at 10.31 g/t Au from 130 metres (18WDRC0156)
- 5 metres at 3.64 g/t Au from 57 metres (18WDRC0159)
Assays for all remaining holes have now been returned which include down-dip high-grade bedrock gold intersected in diamond drilling at Gilmour with best results as follows:
- 10.53 metres at 4.19 g/t Au from 165 metres (18WDDD0021) including 1 metre at 18.46 g/t Au from 167 metres and 1 metre at 18.02 g/t Au from 172 metres
- 7 metres at 2.24 g/t Au from 152 metres (18WDDD0021) including 1 metre at 9.12 g/t Au from 153 metres
One diamond and four RC intersections of particular interest at Gilmore consistently show the quartz-sericite-pyrite mineralisation style described above and are interpreted to form a continuous high-grade zone of an approximate 400 metre strike length. These intersections are highlighted in Figures 6 and 7 and from north to south include:
- 10.53 metres at 4.19 g/t Au
Drilling to date demonstrates similar geology and mineralisation as observed along strike to the north at the Golden Highway, host to 600,000 ounces of gold.
Plan view of simplified interpreted geology at Gilmour-Morello
Follow-up drilling will be planned on completion of detailed interpretation and high level economic evaluation of results. Future drilling will be designed to test the continuity of, and strike extensions to, the currently defined zones. The aim will be to identify an area of mineralisation able to support possible resource drilling in 2019.