Murninnie Mine, Eyre Peninsula, South Australia (Copper/gold, AAO – 45%) continued It occurs in close proximity to granite bodies of the “Hiltaba” suite which are associated with all the above-named deposits, and others throughout the Gawler Craton (Figure 10). The surrounding EL is also prospective for uranium, both in the crystalline basement and younger sediments which cover the eastern part. Historic mining development extends to more than 50 metres depth while mineralisation is exposed over 450metres strike length in the walls of a steep gully shown in the photo below. Ore shipments averaged around 10% copper, and in some cases assayed up to 5% bismuth. Recently sampled mine dump material assayed up to 7.7% copper, 3.8 grams/tonne gold, 2.4% bismuth and 10.0 grams/tonne silver. The extensions of the deposit have never been drilled. Mining spoil marks the trend of the Murninnie lode obliquely cutting across “Hurrels Gap” gully. View towards the south east. The smaller photo shows pervasive hematitic alteration of metasediments at the mouth of one of the adits into the mineralisation Soil geochemistry and occasional outcropping showings of secondary copper mineralisation indicate extensions of the mineralised structure over several kilometres to the north and south. An extensive gravity survey completed in 1984, centred to the west of the Murninnie area revealed a 5 milligal anomaly at its margins covering the unexplored south-west part of the EL (Figure 11). Secondary copper coatings (greenish) on outcropping hematitic brecciated granitiod host-rock – outcrop at “The Scratchings” Although the regolith cover is shallow over most of the EL, outcrop is limited and patchy, and calcrete development is extensive. The geochemical and gravity data acquired to date (Figure 11) present a number of targets for drilling which is proposed to commence early in 2007 after completion of further gravity surveys.
AAO Price at posting:
0.0¢ Sentiment: Buy Disclosure: Not Held
