Botswana focussed metals exploration company Kavango Resources plc (LSE:KAV) (“Kavango”) is pleased to release an Independent Conceptual Economic Viability Report (the “Viability Report”) for the Iron Oxide Copper-Gold target (the “IOCG Target”) at the Great Red Spot within Target Area B in the northern (Hukuntsi) section of the Kalahari Suture Zone (“KSZ”).
The IOCG Target at the Great Red Spot exhibits similar geophysical signatures to the Olympic Dam IOCG ore-deposit that is owned and operated by BHP in Australia. A full description of the IOCG Target can be found in the announcement made on 09 May (>>> link here).
Kavango commissioned the Viability Report to assess whether the IOCG Target would be an economically viable mine, should drill testing confirm mineralisation. The Viability Report was prepared by Executive Mining Group Ltd (“Executive Mining”), an established firm of mining executives with extensive experience in Africa.
The Viability Report is a conceptual study and should not construed as a definitive study and has been created to support further exploration of the IOCG Target, including future test drilling.
Executive Mining concludes that the IOCG Target would be economically viable at depths up to 2km below the surface, should sufficient bulk of mineralisation be discovered that is of sufficient grade.
Kavango plans to release an exploration plan for the IOCG Target in the coming weeks, which will describe the Company’s approach to testing this target thoroughly.
Ben Turney, Chief Executive Officer of Kavango Resources, commented:
“The IOCG Target at the Great Red Spot is highly attractive because it is so large, and the geophysical indicators so compelling. Results from three separate surveying techniques (gravity, magnetics and CSAMT) appear to correlate with one another, while the established presence of magnetite from Hole KSZDD001 provides a further physical exploration lead.
To add further weight to ongoing pursuit of this deposit style at the estimated depths, we commissioned this Independent Conceptual Economic Viability Report by Executive Mining.
As this stage it is important to understand that the numbers presented are idealised. Until Kavango is able to drill test the IOCG Target we cannot know what the geological formations are nor whether any mineralisation is present.
The purpose of this report is to give Kavango confidence that the IOCG Target is worth pursuing. We’ve tried to be conservative with the input numbers, especially the estimated forward metal prices.
Clearly, as investors will see in the tables at the bottom of this announcement, this is a project of significant potential. We are very pleased with the results of the report and Kavango will continue further exploration of the IOCG Target, with a view to vectoring in on specific drill targets.”
The Great Red Spot is a 5km x 8km magnetic body on the western margin of the Kaapvaal Craton, which Kavango interprets as a promising location for magmatic intrusions and mineralising systems. It lies at the nexus of 4 interpreted regional geological structures.
Kavango’s interpretation of available regional data leads the Company to conclude that the Great Red Spot is located in an enhanced position for the potential for multiple ore deposit models, including both the IOCG and Ni/Cu magmatic sulphide systems.
IOCG systems can host highly valuable copper, gold and uranium ores. The large size and relatively simple metallurgy can produce extremely profitable mines. These systems are often multi-kilometre mineralised “overprints” of local host rocks. They can vary a great deal in their composition but do share several common characteristics.
IOCG systems are known as “alteration” systems, meaning that mineralisation formed during hydrothermal phase transitions. These hydrothermal phases are driven by deep magmatic intrusives that act as heat sources. This means, an IOCG system can “overprint” the host rock lithology with both alteration and mineralization.
The IOCG Target is a large-scale, 30 milliGal gravity anomaly that is coincident with a strong “crown-like” magnetic anomaly. Controlled Source Audio Magnetotelluric (“CSAMT”) surveys performed by the Company appear to indicate multiple zones of potential alteration. The IOCG Target is a second possible mineralisation style at the Great Red Spot, in addition to the nickel-copper sulphide model.
The Economic Viability Report Project Brief
Kavango provided Executive Mining with the following project brief:
– Kavango is developing a geophysical target based on an Olympic Dam model (resources below).
– This target probably lies deeper than the Olympic Dam orebody, which lies beneath 300m of cover rock and is mined down to 900m depth.
– Kavango wishes to assess this target viability from an economic perspective, based on its location in the Western Kalahari near the town of Tshane, Botswana.
– The target lies within Proterozoic rocks, below ~650-950m of Karoo sediments and ~50m of Kalahari sediments.
– The target zone for possible mineralisation is certainly below 1000m depth.
– Kavango’s question is if an Olympic Dam type and scale of orebody could be economically viable if it was located at (i) 1000m, (ii) 1500m, or (iii) 2000m depth (3 cases), perhaps via the block caving or any other mining method?
– Could the economies of scale of this very large target type enhance the economic viability?
– Kavango is asking this question as a hypothetical, knowing that many variables such as rock type and rock competence are unknowns at this stage. These must be assumed to be positive, for now.
– It is important to demonstrate the Olympic Dam target type could be economically viable at the depths described.
– Resources (BHP Annual Report, 2018):
§ M, I & I: 10,100M t @ 0.78% Cu, 0.25kg/t U3O8, 0.33g/t Au, 1g/t Ag
§ Inc. Measured:
§ Open-cut Sulphides: 2,960M t @ 0.66% Cu, 0.21kg/t U3O8, 0.32g/t Au, 1g/t Ag
§ Underground Sulphides: 555M t @ 1.71% Cu, 0.50kg/t U3O8, 0.65g/t Au, 4g/t Ag
Viability Report Key Conclusions
– Executive Mining confirms “the potential economic viability of mining an Olympic Dam lookalike IOCG deposit at depths greater than 1 km below the surface.”
– Results are based on 2 grade scenarios and 2 CAPEX scenarios
– 1km orebody depth and 2km orebody depth modelled
– Kavango’s forecast metal prices used for modelling:
– Gold (Au) – $1,600/oz
– Silver (Ag) – $18/oz
– Copper (Cu) – $3.50/lb
– Uranium (U3O8) – $28/lb
– 3 economic scenarios are presented using Kavango’s estimated grades, forecast metal prices and BHP’s reported mill feed grades (see tables below for full results):
– Botswana government royalty of 3% applied
– Discounted Cash Flow Rate of 10% applied
– NPV10 estimates range from $3bn to $8.05bn*
– Estimated Internal Rates of Return range from 17% to 31%*
– Kavango will publish the Valuation Report on its website via the following link
*It is important to note these numbers are illustrative and represent an idealised interpretation should the IOCG Target conform to an Olympic Dam style collection of ore bodies. They should not be construed as a definitive study.
High Level Financial Evaluation Model Assumptions
Geology inputs include:
– In plan view, the Olympic Dam Breccia Complex (ODBC) is irregular in shape, with hematite-granite breccia bodies arranged around the central barren haematite-quartz breccia core and a relatively long and narrow NW extension.
– The halo of weakly altered and brecciated granite extends out 5-7 km from the core in all directions to an indistinct and gradational margin with the host granite.
– The ODBC strike length of the hematite‐altered mineralised breccias within the complex is >5 km in a NW‐SE direction, and up to 3 km across. The ODBC locally extends to depths of >1.4 km ‐ the base of the complex has yet to be intersected by drilling.
– Ore zones are a mixture of sub‐vertical elongate bodies varying from 100 to 300m wide, up to 1000m strike and in the basal units open at depth, and sub‐horizontal ‘ore’ is 50 to 100m thick with variable extents from 50 to 300m in width and length.
– 2 grade scenarios were tested:
Further information in respect of the Company and its business interests is provided on the Company’s website at www.kavangoresources.com and on Twitter at #KAV.
For further information please contact:
Kavango Resources plc
+46 7697 406 06
If anyone reads this article found it useful, helpful? Then please subscribe www.share-talk.com or follow SHARE TALK on our Twitter page for future updates.
Terms of Website Use
All information is provided on an as-is basis. Where we allow Bloggers to publish articles on our platform please note these are not our opinions or views and we have no affiliation with the companies mentioned