Adelaide Resources (ASX: ADN) has intercepted multiple broad zones of copper mineralisation during maiden drilling at Blue Tongue in South Australia.
Assays included 25 metres at 0.26% copper from 29 metres, and 14 metres at 0.31% copper from 59 metres.
The 1 kilometre Blue Tongue target lies within ADN's Moonta Copper-Gold Project on the Yorke Peninsula, towards the southern end of the Olympic Copper-Gold Province which hosts BHP's giant Olympic Dam mine.
The target was defined in December 2013 via a soil geochemical survey which identified a strong copper anomaly south of ADN's Alford West Prospect.
Primary mineralisation at Blue Tongue is assumed to be present as copper sulphide, however no sulphide minerals were observed during geological logging of the drill hole samples, and laboratory assays confirmed the lack of sulphur.
Absence of sulphides suggests that the primary mineralisation is oxidised below the zones reached by the aircore drilling, which was limited to 60 metres depth, and a deeper supergene enriched sulphidic target zone may be present.
There are also likely to be sub-zones at Blue Tongue, with areas of higher grade mineralisation, presenting targets for deeper drill testing.
ADN is now considering an induced polarization survey to assist future deeper drill targeting at Blue Tongue.
Drilling of other targets, including the western extensions of the Alford West Prospect, has been recently conducted, with assay results due shortly.
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