MineralAn LCT pegmatite is a granitic pegmatite enriched in lithium, cesium and tantalum. The USGS describes these rocks as a chemically defined subset of granitic pegmatites, commonly associated with highly evolved granites. Their major minerals include quartz, potassium feldspar, albite and muscovite.
| Element | Associated minerals |
|---|---|
| Lithium | Spodumene, petalite and lepidolite |
| Cesium | Pollucite |
| Tantalum | Columbite-tantalite |
LCT systems can show regional and internal zoning. Different parts of a pegmatite can therefore have different mineral assemblages and concentrations. The presence of pegmatite alone does not establish lithium mineralisation. USGS: Mineral-deposit model for LCT pegmatites (2017).
Read the evidence behind the label
Our research checklist starts with the sample: identify its location, type, laboratory result and units. A selected surface specimen answers a different question from a continuous drill interval. Look for the source report’s sampling methods, geometry and verification before comparing headlines. NI 43-101, section 3.3: exploration results.
Record whether the assay measures lithium (Li) or lithium oxide (Li₂O). Changing percent to ppm preserves the analyte; it does not convert Li to Li₂O. Use the unit guide and keep the reported chemical basis attached to every number.
What would move the evidence forward?
Look for drilling that tests continuity, a stated resource basis and metallurgical work on representative material. Treat these as separate questions: where is mineralisation, how much is supported by the data, and how would the material be processed? A rock-type name cannot answer all three. Our technical-report guide shows where to find that evidence.