Herberton Project

The Herberton Project is located approximately 150km west of Cairns in Northern Queensland and consists of the 100% owned granted exploration permits EPM 27168 (Herberton), EPM 27721 (Isabel), EPM 27223 (Orient), EPM 27331 (Wade Creek) plus the application EPM 28899 (Boonmoo Extension), with a total area of approximately 330km2.

Mining activity commenced in the Herberton Region in 1880 with the discovery of tin in Herberton. There are over 2,400 known historical mines and mineral occurrences in the area (tin, copper, zinc, lead, silver, antimony and tungsten). The Elizabeth Creek Granite, the Hodgkinson Formation, and the late Palaeozoic Featherbed Volcanics are extensively mineralised.

Iltani’s focus is on the exciting Orient Silver-Lead-Zinc-Indium Project:

  • Orient is an extensive precious metal-rich epithermal system with a likely intrusion (porphyry) at depth with strong similarities to the large Bolivian Ag-Zn-Pb-In-Sn porphyry systems.
  • Hosts multiple high-grade zinc-lead-silver-indium veins and stockworks outcropping over at least a 4km2 area.
  • Zoned hydrothermal alteration (phyllic, argillic & propylitic) surrounding mineralisation.

Iltani’s drilling at Orient has intersected extensive mineralised zones highlighting open pit and UG potential:

Open Pit Bulk Tonnage Potential

  • ORR001: 38m @ 190 g/t Ag Eq. from 19m
  • ORR010: 41m @ 125 g/t Ag Eq. from 60m
  • ORR003: 41m @ 107 g/t Ag Eq. from 39m
  • ORR012: 9m @ 216 g/t Ag Eq. from 63m
  • ORR014: 11m @ 148 g/t Ag Eq. from 144m
  • ORR011: 10m @ 152 g/t Ag Eq. from 141m
  • ORR022: 14m @ 115 g/t Ag Eq. from 10m 

High Grade UG Potential

  • ORR001: 7m @ 454 g/t Ag Eq. from 27m
  • ORR021: 5m @ 440 g/t Ag Eq. from 117m
  • ORR021: 4m @ 448 g/t Ag Eq. from 186m
  • ORR003: 5m @ 346 g/t Ag Eq. from 59m
  • ORR012: 3m @ 526 g/t Ag Eq. from 67m
  • ORR011: 3m @ 505 g/t Ag Eq. from 71m

Drilling at Orient has also intersected some of the highest ever reported indium grades in Australia, returning up to 1,070 g/t In.

  • Historical metallurgical test work indicates that Orient can produce a lead-silver concentrate (48% Pb & 2,250g/t Ag) and a zinc-indium concentrate (47-48% Zn, 2,000 g/t In & 200 g/t Ag)
  • Highlights Orient’s potential to become one of Australia’s largest producers of silver and indium.

The Herberton Project includes multiple additional highly attractive targets:

Isabel Silver-Lead-Zinc-Indium Project

  • Isabel is a massive sulphide deposit with a high-grade Non JORC Mineral Resource of 85-90kt @ 15.3% Zn, 2.8% Pb, 0.7% Cu, 113 g/t Ag & 370g/t In and is Australia’s highest grade indium deposit.
  • Isabel was last drilled in early 1970s and a mining study completed in 1972. The deposit is open in multiple directions with significant potential to increase the deposit size.
  • Historic metallurgical test work indicates the potential to produce high grade lead-silver and zinc-silver-indium concentrates.

Isabel Extended Copper Project

  • Exploration was carried out in the early 1970’s and 1980’s at Isabel Extended, including soil geochemistry, gossan chip sampling, geophysics (IP, EM and Mise-a-la-Masse (MALM), geological mapping and diamond drilling.
  • High grade massive sulphide copper mineralisation discovered in MIED1 (1.45m @ 3.1% Cu from 177.2m and 7.25m @ 3.3% Cu & 173 g/t Ag from 182.13m down hole), high grade copper-lead-zinc-silver mineralisation in MIED3 (2.55m @ 2.0% Cu, 1.0% Pb, 13.2% Zn & 409 g/t Ag from 91.08m down hole).

Antimony Reward Project

  • High grade antimony vein system which was last drilled in 2008 with 10 RC holes completed.
  • Notable intercepts include: 3m @ 3.49% Sb from 62.0m, 12m @ 2.73% Sb from 29.0m and 5m @ 3.21% Sb.

Boonmoo Epithermal Gold Target

  • Recent Iltani exploration has discovered the Boonmoo low sulphidation epithermal system.
  • Discovery rock chip returned assay of 7.9 g/t Au & 2.2 g/t Ag.
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