Oscar and Mt Hann Diamond Projects

The Opportunity

 

The Oscar and Mount (Mt) Hann Diamond Projects are located in the Kimberley Region of WA, Australia’s premier diamond province, hosting world-class Argyle and Ellendale mines.

The Kimberley has seen a resurgence in interest following the recent discovery of micro- and macro-diamonds at the Little Spring Creek prospect by Lucapa Diamond Company (ASX: LOM), and the recovery of micro-diamonds from outcrop by Lithoquest Diamond Inc. (TSX.V: LDI) at its North Kimberley Diamond Project.

DevEx identified these outstanding opportunities after completing a favourable review of the exploration potential of the region utilising new geological concepts and an innovative approach to the vast amount of historical exploration data available. 

The Oscar Applications are located immediately south-east of the Ellendale diamond mines and contains four known lamproite occurrences. It also lies south of Lucapa Diamond Company’s (ASX: LOM) Little Spring Creek prospect, where diamonds were discovered in lamproite during recent drilling. There is potential at Oscar for a lamproite system, similar to that at Ellendale.

The Mount Hann Applications, equidistant from Ellendale and the world-class Argyle diamond mine, covers one of the most significant unresolved micro-diamond anomalies in Australia. It has produced numerous micro-diamonds from historical stream sediment and loam sampling by previous explorers, the sources of which are still undiscovered.

Please refer to ASX Announcement – ‘DevEx applies for New Diamond Opportunities, Kimberley WA – 2 July 2018’ for full details.

For the latest project overview, view our Investor Presentation.

Figure 1: The Oscar and Mt Hann Projects are located in Australia’s premier diamond district, WA’s Kimberley Region, in close proximity to world-class diamond mines.

Location

 

The Oscar and Mt Hann Projects are located in the renowned Kimberley Region in the far north of Western Australia. The diamond endowment of the Kimberley is globally recognised, and the district has the capacity to deliver additional discoveries, as demonstrated by these recent exploration successes.

Figure 2: Location of the Oscar and Mt Hann Projects, Western Australia.

Geology

 

Oscar Applications

Four Exploration Licence applications (totalling 1,600km2) are in the Oscar area immediately south-east of Ellendale, and south of the Little Spring Creek prospect, where Lucapa Diamond Company Limited has recently announced its positive results from exploration activities (see ASX: LOM release dated 23 May 2018).

Within DevEx’s Oscar applications, four known lamproites occurrences have been identified in drilling by previous explorers. These lamproite occurrences are interpreted to be part of a ‘lamproite system’, similar to that at Ellendale. All four occurrences are located along the south-east structural trend (see Figure 2). 

Figure 3 – DevEx’s new Exploration Licence applications at Oscar.

Mt Hann Applications

Four Exploration Licence applications are in the Mount Hann area (totalling 1,100km2), approximately equidistant from Argyle and Ellendale. The Mount Hann area has produced numerous micro-diamonds from stream sediment and loam sampling by previous explorers (see Figure 4). It is one of the most significant unresolved micro-diamond anomalies in Australia.

The interpreted lithosphere thickness below these micro diamond occurrences (~217km) is similar to that at Argyle (~217km) and Ellendale (~212km), indicating the potential for similar mantle conditions and processes.

Figure 4 – DevEx’s new Exploration Licence applications at Mount Hann. Diamond occurrences in sampling by previous explorers is shown. The image background is potassium radiometrics.