Calcium enriched
Yellow and orange samples occupy the higher-CaO field interpreted as carbonatite-related.
THOR IN 3D · CARBONATE-RICH MAGMATISM
Carbonatite.A carbonate-rich phase
within the lamprophyre system.
Calcium-rich carbonate material in THOR-246 and associated alteration support a working lamprophyre–carbonatite interpretation—without requiring a separate, mapped carbonatite plug.
- Drill evidence
- THOR-246
- Key distinction
- Ca-rich
- Association
- Lamprophyre
- Standalone body
- Not mapped
01 · PROJECT DEFINITION
A carbonate-rich component—not a proven independent body.
At Thor, “carbonatite” describes calcium-rich carbonate melt material, segregations or carbonatite-style alteration associated with lamprophyre. The interpretation is based on core textures, alteration and geochemical separation from epithermal carbonate.
THOR-246 · LABELLED 392 M
Carbonate-rich drill core.
The pale carbonate-rich domains resemble some epithermal carbonate visually, making chemistry essential to distinguishing the populations.
CaO–MgO–Fe₂O₃
Two carbonate populations.
THOR-246 and THOR-256 lamprophyre-associated samples plot toward higher calcium, while Broadview and True Fissure epithermal carbonate clusters closer to the Fe₂O₃–MgO base.
02 · GEOCHEMICAL SEPARATION
Similar appearance.
Different composition.
The project’s ternary plot separates the carbonate-rich lamprophyre association from epithermal vein carbonate using relative calcium, magnesium and iron-oxide chemistry.
Iron–magnesium trend
Blue and red samples cluster closer to the Fe₂O₃–MgO side of the diagram.
The plot is a project classification tool. It demonstrates compositional contrast among the plotted samples; it does not by itself establish the size, continuity or origin of a separate intrusive body.
03 · LAMPROPHYRE ASSOCIATION
Two melt expressions within a volatile-rich system.
Global alkaline intrusive analogues commonly pair lamprophyre with carbonate-rich phases. Taranis applies that model to Thor, where carbonate lenses, droplets and alteration occur within and around lamprophyre dykes.
Low-degree melting
The working model begins with small-degree melting of metasomatized mantle material.
Volatile rich
Water, carbon dioxide, fluorine and chlorine can be concentrated in the evolving melt.
Incompatible elements
Barium, strontium, rare-earth elements, potassium and rubidium may become enriched.
Melt separation
Silicate and carbonate-rich liquids may segregate, producing lamprophyre and carbonate-rich expressions.
Ocelli, lenses and alteration—not necessarily a plug.
Carbonate melt droplets can solidify as calcite-rich ocelli, while larger segregations or fluid-rich zones may create carbonate flooding around dykes. The Thor evidence is currently interpreted at this component scale.
04 · FIELD EXPRESSION
Carbonate flooding, bleaching and reaction rims.
At outcrop and core scale, the interpreted carbonate-bearing magmatic system is expressed through intense alteration around lamprophyre and locally through fuchsite-bearing, strongly carbonatized sedimentary rock.
Altered host rock
Fuchsite along the dyke margin.
Strongly carbonatized sediment contains scattered fuchsite “eyes.” The source reports local gold values up to 0.5 g/t Au in this alteration setting.
THOR-246 · LABELLED 404.5 M
A second carbonate-rich interval.
Pale tan material and breccia-like textures provide another core-scale expression of the working carbonatite interpretation.
Carbonate flooding
Abundant carbonate overprints and replaces parts of the host-rock fabric.
Bleached alteration
Pale, carbon-dioxide-rich zones develop beside and around the dykes.
Reaction fronts
Sulphidation and mineral rims record chemical exchange between intrusive material and host rock.