With the recent drilling results from Midnight Sun Mining, it looks like we're going to be talking about copper. So, I wanted to provide some context as to what we're excited about. Copper demand is surging, and our demand for electricity has never decreased.
Kazhiba: A High-Grade Oxide Copper Discovery with Near-Term Potential
Midnight Sun recently announced exceptional drilling results from its Kazhiba Target at the Solwezi Project in Zambia. The numbers speak for themselves:
- 10.69% copper over 21 meters
- 5.60% copper over 26 meters
- 3.01% copper over 15 meters
While average copper grades in the sector hover around 0.5-0.6%, these results are very exciting. More importantly, this is oxide copper, which has major implications for how it can be processed and monetized.
Understanding Oxide Copper vs. Sulfide Ore – Why It Matters
Copper deposits come in two primary forms: oxide and sulfide. The difference isn't just geological—it directly impacts mining, processing, and project economics.
Oxide Copper (like Kazhiba)
- Sits near the surface
- Easier to mine
- Processed using SX/EW (solvent extraction-electrowinning), which produces copper cathodes ready for sale
Sulfide Ore
- Found deeper underground
- Requires complex flotation and smelting before copper can be extracted
- Takes longer and costs more to process
Kazhiba's high-grade oxide deposit means near-term production potential—without the need for massive capital expenditures on smelters or concentrators.
Does Oxide Copper Indicate Sulfide Ore Below?
- Often, but not always. Many oxide deposits form as the weathered upper portions of sulfide copper systems, meaning that finding strong near-surface oxide mineralization can suggest a deeper sulfide ore body.
- Exploration Techniques: Drilling through the oxide layer into unweathered rock can confirm the presence of sulfides below. Additional geochemical soil sampling and geophysical surveys (like IP surveys) help pinpoint deeper ore bodies.
- Examples: Large copper mines often start as oxide discoveries before drilling confirms a major sulfide system. First Quantum's Kansanshi Mine is a prime example—it hosts both significant oxide and sulfide copper mineralization.
What Midnight Sun's Results Mean
- The strong oxide copper grades (up to 10.69% Cu) suggest an extensive copper system is present at Kazhiba.
- The source of the mobilized oxide copper is not yet confirmed, meaning further drilling is needed to locate the primary sulfide body.
- Follow-up drilling, scheduled for April 2025, will target deeper sulfide mineralization based on these oxide results.
Big-League Partners: First Quantum & KoBold Metals
Midnight Sun has secured two partnerships that validate the scale of their opportunity:
- First Quantum Minerals – One of the world's biggest copper producers and operator of the Kansanshi Mine—located just 6 km from Kazhiba. Their Cooperative Exploration Program with Midnight Sun aims to fast-track development. If Kazhiba's oxide resource continues to expand, First Quantum already has the infrastructure to process it.
- KoBold Metals – Backed by Bill Gates, Jeff Bezos, and major Silicon Valley investors, KoBold specializes in using AI to find tier-one copper deposits. They're working with Midnight Sun to analyze and drill deeper targets that could lead to the next major copper discovery in Zambia.
