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There is a long history of small-scale mining activity in the Goodsprings District. Since 1921, 19.1 tonnes of ore, at an average grade of 9.5% Co, were shipped from four mines.

The Goodsprings Project is located in the mining friendly, Tier 1 jurisdiction of Nevada, USA. The Project is near the township of Goodsprings, approximately 50km southwest of Las Vegas. Access is via sealed roads, access throughout the Project is good, via a network of unsealed gravel roads. Koba owns a 100% interest in 118 unpatented mining claims covering approximately 900 hectares.

Small scale mining in the Goodsprings District has a long history with many small-scale operations active between 1896 and 1962. Little attention was afforded cobalt until 1921, when 19.1 tonnes of ore at an average grade of 9.5% Co were shipped from four mines.

Figure 1. Geology of the Goodsprings Copper-Cobalt Project

Systematic Soil Sampling Program

The project underwent systematic soil geochemistry sampling in 2018 with 2,351 samples collected on 200m x 50m centres to help delineate the lateral extent of mineralised areas.

16 significant copper and cobalt anomalies were delineated including:

  • a series of five coherent cobalt‐copper soil anomalies that extend over more than 5,000m of strike either side of the historical Columbia Mine, where shipments of ore grading up to 29.2% cobalt were recorded in 1921. These anomalies – Double Down, Surprise, Columbia and Mill are all mapped to lie within the same geological sequence as that which hosts the Columbia Mine; and
  • Blue Jay – a 1,000m long coincident cobalt‐copper soil anomaly over and along strike from the historical Blue Jay Mine, where a shipment of ore grading 6.37% cobalt was recorded in 1922.

Figure 2. Cobalt-in-soil geochemistry at the Goodsprings Copper-Cobalt Project

IP Survey

Subsequently an IP survey was completed covering a total area of 7.2km2 over 7 of the highest priority Co-Cu soil anomalies. 18 high-priority targets were identified where moderate chargeability and/or high conductivity anomalies were coincident with, or adjacent to, anomalous cobalt and copper in soil geochemistry.

No follow-up work has been undertaken on these coincident IP and soil anomalies, and no drilling has been undertaken previously. These high-priority, drill-ready targets could be tested in the near-term.

Koba plans to undertake further field work to better understand mineralisation controls at Goodsprings with the information acquired to further guide future plans.

Figure 3. Depth slice of IP chargeability 75m below surface, with contours of cobalt and copper soil geochemistry and IP targets

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