Built by a geologist
Exploration for Critical Minerals
Exploration for Critical Minerals — Finding What the World Needs Discovering new critical mineral deposits requires integrating multiple geological, geophysical, and geochemical techniques. As demand grows and easy-to-find deposits are developed, exploration must go deeper, into more remote areas, and use increasingly sophisticated methods. The Exploration Pipeline Critical mineral exploration follows the same general stages as all mineral exploration, but with specific techniques tailored to each commodity: 1. Regional targeting — Desktop study using published geological maps, satellite imagery, and government geoscience databases. 2. Reconnaissance exploration — Regional-scale geochemistry stream sediment, till sampling , airborne geophysics, and field mapping. 3. Target generation — Detailed ground geophysics, soil geochemistry, trenching, and geological mapping to define drill targets. 4. Drilling — Diamond drilling to test targets at depth. Core logging and assaying confirm mineralization. 5. Resource estimation — Sufficient drilling to support a NI 43-101 compliant mineral resource estimate in Canada . Geophysical Methods Different critical minerals respond to different geophysical techniques: - Magnetics — Useful for detecting mafic-ultramafic intrusions that may host nickel, PGEs, and chromite. Also useful for mapping geological structures. - Electromagnetics EM — Detects conductive sulfide bodies associated with nickel-copper and VMS deposits. - Gravity — Identifies dense intrusions e.g., chromite-bearing ultramafic bodies and structures. - Radiometrics — Directly detects uranium and thorium, essential for uranium exploration. - Induced polarization IP — Detects disseminated sulfides in porphyry copper systems. Geochemical Methods - Till sampling — In glaciated terrains like Canada, analyzing glacial till for indicator minerals and anomalous metal concentrations can trace mineralization back to its bedrock source. - Soil geochemistry — Systematic soil sampling to detect metal anomalies over buried deposits. - Biogeochemistry — Analyzing plant tissue for metal uptake — trees growing over mineralization can accumulate detectable amounts of target elements. - Indicator minerals — Specific minerals that survive glacial transport and indicate the presence of particular deposit types. For example, Cr-diopside and chromite indicate kimberlite/ultramafic so