Botswana Minerals Plc · LSE:BMIN
Botswana Minerals — Botswana Diamonds — African Exploration Showcase 2023
25 slides from Botswana Minerals's conference presentation, Nov 16, 2023
Slide 1: The Economic Diamond Potential of the Kalahari of Botswana
The Economic Diamond Potential of the Kalahari of Botswana James AH Campbell Managing Director, Botswana Diamonds plc African Exploration Showcase Geological Society of South Africa Johannesburg 15-16 November 2023
Slide 2: Agenda
African Exploration Showcase 2023 The Economic Diamond Potential of the Kalahari of Botswana At theMarsfontein blow discovery pit overpitOrapa and dumps when active AK1, discovered 19 April 1967: Jim Gibson, Gavin Lamont & Manfred Marx AGENDA ⧫ Significant Diamond Discoveries ⧫ Economic Diamond Pote
Slide 3: Significant Diamond Discoveries
Significant Diamond Discoveries “If you want to know the future, look at the past.” Albert Einstein Photo: Andreas Stelzer African Exploration Showcase 2023 3
Slide 4: Diamond Discoveries: Orapa
Diamond Discoveries: Orapa ⧫ 1896-1899: British West Charterland Limited explored for gold and diamonds. ⧫ 1932: “Kimberlites are undoubtedly present in Bechuanaland and gravels from large river may prove diamondiferous” (Dr Alex du Toit). ⧫ 1938: Victoria Prospecting Company Ltd washed 1,163 loads
Slide 5: Diamond Discoveries: Jwaneng
Diamond Discoveries: Jwaneng ⧫ 1962: Gibson sampled either side of the Lobatse Ghanzi road and passed 20 km south of Jwaneng 1972: Drilling of Malan 1 (DK1) but no positive samples. ⧫ 1969: Reconnaissance sampling produced first kimberlitic ilmenites. ⧫ Lamont correctly hypothesized that bioturbatio
Slide 6: Diamond Discoveries: Ghaghoo (Gope)
Diamond Discoveries: Ghaghoo (Gope) ⧫ 1977: Falconbridge flew an airborne magnetic survey over the Kokong and 1980: Helicopter supported sampling programme in the CKGR Tshabong areas. ⧫ 1980: This was followed-up by a helicopter supported sampling program in the CKGR which led to the discovery of Go
Slide 7: Diamond Discoveries: Karowe (AK6)
Diamond Discoveries: Karowe (AK6) ⧫ Discovered in 1969 by De Beers who considered the kimberlite too small and low grade. ⧫ 2004: JV between De Beers and African Diamonds plc (‘AFD’) with positive initial drilling results, following application of breakthrough geophysical and drilling technologies.
Slide 8: Diamond Discoveries: KX36
Diamond Discoveries: KX36 ⧫ 1980-90’s: heavy mineral sampling by Falconbridge, Rio Tinto and De Beers identified heavy mineral grain anomalies in 2015: Large Diameter Drilling the vicinity of KX36 in the CKGR. (‘LDD’) with the Elephant Rig on KX36 ⧫ 2007: Petra acquired the Prospecting Licenses and
Slide 9: Economic Diamond Potential (of the Kalahari)
Economic Diamond Potential (of the Kalahari) African Exploration Showcase 2023 9
Slide 10: Ghaghoo
Ghaghoo ⧫ Ghaghoo is a 10.8 Ha kimberlite pipe in the CKGR. ⧫ The pipe has an Indicated Resource of 79.3MT at an average grade of 19.5 cpht and diamond value of $242/ct or $47/T (2014 data)* ⧫ Diamonds include rare fancy and coloured diamonds, notably orange and blue stones. ⧫ The resource has been
Slide 11: KX36
KX36 ⧫ KX36 is a 3.5 Ha kimberlite pipe in the CKGR and is 60-km from Ghaghoo. ⧫ The establishment of a footprint in the CKGR at Ghaghoo will reduce the cost of evaluation and development through economies of scale. ⧫ The pipe has Resources of 17.9MT at 35 cpht (Indicated) and 6.7MT at 36 cpht (Infe
Slide 12: Central Kalahari Diamond Mines Concept
Central Kalahari Diamond Mines Concept ⧫ Two mega pits. ⧫ Ultra low-cost stripping: ⧫ Floating barge and underwater mining or ⧫ High angle conveyor concept. ⧫ Centralised diamond recovery and management. ⧫ Energy efficiency: solar power. ⧫ Potentially carbon neutral operations. Technical Innovation!
Slide 13: Exploration Potential (of the Kalahari)
Exploration Potential (of the Kalahari) African Exploration Showcase 2023 13
Slide 14: Exploration Strategy - General
Exploration Strategy - General ⧫ Diamond bearing kimberlites still waiting to be discovered! ⧫ Target selection is key. ⧫ Exploration needs to focus in areas of cover, such as the Kalahari. ⧫ Sampling will require more precision and finer grain sizes. ⧫ Focus on Group 2, low magnetic, low ilmenite b
Slide 15: Exploration Strategy - Specifics
Exploration Strategy - Specifics ⧫ In target areas, detailed gravity is a useful tool as is EM: two tools not everybody uses. ⧫ Geochemically sampling termite nests is widely used in base metal exploration and has been used with some success by Pangolin Diamonds. ⧫ One cannot ignore the alluvial dia
Slide 16: Exploration Strategy - Data
Exploration Strategy - Data ⧫ Data sets: ⧫ African Diamonds PLC. ⧫ Botswana Diamonds PLC. ⧫ Sekaka Diamonds Pty. ⧫ Sekaka database: ⧫ c.95,000 sq km of data. ⧫ c.375,000 km airborne geophysical data. ⧫ 606 ground geophysical surveys. ⧫ c.228k soil sample results. ⧫ c.32k drill hole logs. ⧫ Potential
Slide 17: Sekaka & Sunland
Sekaka & Sunland ⧫ BOD owns 100% and is the operator of Sunland and Sekaka. ⧫ Three Prospecting Licences held by Sunland Minerals and Sekaka Diamonds in the Kalahari. ⧫ Prospecting is mainly focused in the Kalahari where abundant kimberlitic indicators reported over eight high-grade geophysical anom
Slide 18: Maibwe JV
Maibwe JV ⧫ Maibwe Joint Venture owned by Future Ghagoo Minerals (50%) and Siseko (50%). Mine ⧫ Siseko is 51% owned by BOD. ⧫ Ten Prospecting Licenses held by Maibwe in KX 36 Discovery the Kalahari. SUNLAND MAIBWE JV KIMBE LICENCES LICENCES RLITES ⧫ Surrounding area hosts Gem’s Ghaghoo mine and BOD’
Slide 19: The Future?
The Future? Photo: John Shelton African Exploration Showcase 2023 19
Slide 20: The Future: Potential Small Mines
The Future: Potential Small Mines Tonnage Grade Value (Mt) (cpht) ($/ct) Opening of Tswapong Mine (Lerala), November 1997 Ghaghoo Indicated 79.3 19.5 242 Inferred 28.7 17.5 239 KX36 Indicated 17.9 35.0* 65* Inferred 6.7 36.0* 65* Lerala Indicated 8.5 32.8 74 Inferred 1.8 25.4 78 Total 142.9 Another
Slide 21: The Future: Technical
The Future: Technical ⧫ Metallurgical, squeezing more life out of current mines or re-opening dormant mines: ⧫ Liberation: milling, inter-particle crushing. ⧫ Recovery: XRT sorting. ⧫ Exploration, finding new deposits: ⧫ Use finer grain-sizes to locate Group 2 and Ilmenite-poor Group 1 kimberlites.
Slide 22: The Future: Fiscal
The Future: Fiscal Natural diamond demand will return and we need to be ready: ⧫ Botswana remains a highly attractive investment destination due to relatively low competition, high diamond prospectivity and low unit operating costs. Future diamond supply depends on exploration (and technical innovat
Slide 23: Thank You Questions & Discussion
Thank You Questions & Discussion Photo: Andreas Stelzer African Exploration Showcase 2023 23
Slide 24: About the Author
About the Author ⧫ James Campbell is Managing Director of Botswana Diamonds plc (a diamond development company active in Botswana, South Africa and Zimbabwe and listed on London AIM and the Botswana Stock Exchange). He has spent over thirty-five years in the diamond industry in a variety of leadersh
Slide 25: Contact details
162 Clontarf Road Clontarf Dublin 3 Ph: +27 83 457 3724 Web: www.botswanadiamonds.co.uk Twitter: @BotswanaDiamond Email: james@botswanadiamonds.co.uk African Exploration Showcase 2023 25
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