Hylea Cobalt Project

Project Overview

The Hylea Cobalt Project (Hylea Project or the Project) represents a significant cobalt exploration target with its grade potential demonstrated in prior drilling.

The Hylea Project sits adjacent to CleanTeq’s Sunrise Project and Australian Mines Flemington Project.

The Project consists of two exploration licences, Hylea EL8520 and Bulbodney EL8641 covering a combined area of 197km2.

Previous Exploration

Early exploration consisted of soil sampling and induced polarisation (“IP”) surveying carried out by Lamadec Exploration in the late 60’s and early 70’s. Later work by PlatSearch NL focussed on platinum mineralisation.

Platsearch and others targeted platinum mineralisation – holes were generally assayed for Pt, Pd, Ni and Cr, with only limited assaying for Co and no assaying for Sc.

The next stage of exploration was by Black Range Minerals (who held the area from 1999 to 2003), with 15 RC holes for 609m being completed at Tiger’s Creek.

This was followed by Rimfire Pacific Mining (“Rimfire”, ASX: RIM), who held the ground from 2004 to 2014 where the primary exploration target was platinum.

Project Geology

Hylea is located over units of the western side of the Lachlan Orogen, one of a number of orogens in Eastern Australia (Figure 2), the Project geology includes late stage (Stage 4), post orogenic zoned Alaskan-Urals style intrusives intruding into deformed early Early Ordovician sediments of the Girilambone Group with some laterite development.

The Lachlan Orogen is host to a number of mineralisation styles and ages (Figure 2); an important group includes porphyry Cu-Au and related mineralisation associated with Ordovician to Early Silurian magmatic arc units of the Macquarie Arc (Figure 2).

A number of Alaskan-Ural intrusive centres have been recognised, including Tout, Owendale, Hylea, Bulbodney and Nyngan, which occur along a NNW trending line (Figures 2 and 3).

These host the Ni-Co-PGE-Sc bearing laterites, formed by the Tertiary weathering of the more mafic phases, including dunites and pyroxenites; as mentioned previously notable examples are those held by CleanTeq, Australian Mines and Platina in the Fifield district and Scandium Minerals near Nyngan; they may also be prospective for intrusive related Cu (-Ni-Co-PGE) sulphide mineralisation.

The Hylea Intrusive covers an area of some 25km2 and is similar in scale and geology to the other “Fifield” Alaskan-Ural complexes in the region, including Tout and Owendale (Figures 4 and 5); significant areas of the Project are under a shallow veneer of Jurassic to recent cover, thus masking the underlying prospective geology.

The Hylea Intrusive has been a number of phases of work since the 1970’s, however this has not covered the whole complex, and as well assaying of drill samples has been inconsistent – hole collars are shown in Figure 4 and highlight the general paucity of drilling; as such the intrusive is considered under explored.

Exploration Plan

Hylea has an aggressive exploration programme planned for the coming months over Hylea, with land access now being secured and statutory permits now being sought for the planned drilling.

Planned activities include:

  • 50m spaced, high resolution airborne magnetics and radiometrics over the entire tenement package (late March),
  • Infill and extensional RC drilling over the Tigers Creek prospect, with an estimated 3,000m in 50 holes (April),
  • Soil geochemical sampling over areas that have residual soils; this includes the Barbarella Cu prospect and a historical soil anomaly in the NW of the Hylea complex, and,
  • Reconnaissance mapping and sampling.

Dependent on the outcomes, the results of this work will be used to plan further activities, as well as the estimation of an initial MRE.