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Gawler Craton Project, South Australia
The Gawler Craton Project includes three separate projects being, Churchill Dam, Kingoonya and Harris Bluff. Churchill Dam is prospective for Iron-oxide Copper Gold Uranium deposits, Kingoonya for Proterozoic gold and Tertiary sandstone hosted uranium deposits, and Harris Bluff for Proterozoic epithermal gold-silver and Menninnie Dam style lead-zinc mineralisation. A summary of each project is set out below.
Churchill Dam
The Churchill Dam Project (covering 528 km2) is situated near the eastern margin of the Gawler Craton within the Olympic Dam Iron-oxide Copper Gold Uranium (IOCGU) Province, approximately 65-90 km southwest of the Olympic Dam-Wirrda Well-Acropolis IOCGU group and 95 km west of the recently discovered Carapateena IOCGU Prospect.
The main target is an IOCGU deposit associated with an untested gravity anomaly of 10 km diameter and 5-10 mgal amplitude in the vicinity of intersecting northeast and northwest trending gravity lineaments. Regional surveys show the presence of a very broad, partly coincident magnetic high at the northern end of the gravity high. There is no basement exposure in the area.
The basement is believed to be mainly comprised of Gawler Range Volcanics, the extrusive equivalents of the Hiltaba Suite, and the discrete gravity anomaly suggests a dense, hematite-altered body may exist in this area.
Previously, one mineral exploration hole, PPR-3, was drilled over the gravity anomaly but was stopped short at 160 m depth in the Pandurra Formation which overlies prospective Gawler Craton basement. Most of the gravity anomaly lies outside the Woomera restricted area and PIRSA funding of $40,000 has been obtained to assist drill testing of the gravity anomaly.
Kingoonya
The Kingoonya Project (covering 197 km2) is located within the central Gawler gold province 40 km northeast of the historic Glenloth goldfields, 80 km northeast of the Tunkillia gold deposit and 90 km southeast of the Tarcoola goldfields and the Perseverance gold deposit.
The Mesoproterozoic Gawler Range Volcanics basement is exposed immediately to the north and south which is largely covered with Cretaceous, Tertiary and Quaternary sediments. Calcrete sampling by previous holders Goldstream Mining NL (Goldstream) and Pima Mining NL indicate broad zones of +5 ppb gold in calcrete anomalism. A single, shallow 8-hole drill traverse on 400m-1.2km spacings by Goldstream over one of the anomalous zones failed to identify the source.
Within the project approximatley 8 km of the Tertiary Kingoonya Palaeochannel exists. The Warrior and Ealbara roll-front uranium occurrences are hosted by the Kingoonya palaeochannel system 140 km and 100 km respectively to the west of Venture Minerals’ Kingoonya Project.
Harris Bluff
Harris Bluff (covering 167 km2) is situated within the southeastern part of the Gawler Craton. Palaeoproterozoic gneisses and granitoids of the Lincoln Complex are overlain by Mesoproterozoic upper Gawler Range Volcanics and associated Corunna Conglomerate, which are locally intruded by the important Mesoproterozoic Hiltaba Suite granitoids.
Surrounding prospects indicate the area is prospective for Au and base metal Pb-Zn mineralisation, Nearby areas of interest include:
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Tasman Resources NL recently announced the discovery of epithermal Au-Ag mineralisation in coliform-banded rock chips to the east; |
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Trafford Resources Ltd’s Weednanna (Au) and Telephone Dam (Pb-Zn-Ag) prospects are located 25 km west-southwest and 15 km to the west respectively of Harris Bluff; and |
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The Broken Hill-style Menninnie Dam deposit situated 25 km to the west-northwest of Harris Bluff is currently being evaluated by the Zinifex Australia Ltd-Terramin Australia Ltd Joint Venture and may be the largest Pb-Zn-Ag deposit in South Australia with substantial drill intercepts over 6 km strike. |

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