Dark
Green-black to brown-black intrusive rock.
Intrusive architecture · Layer 04 of 11
Dark, volatile-rich igneous dykes cross-cut the epithermal veins and create a distinctive structural, mineralogical and geophysical signature.
01 · Dyke geometry
Lamprophyres are small-volume intrusions emplaced as narrow sheets along fractures. At Thor, their steep geometry cuts through the folded and mineralized system.
Green-black to brown-black intrusive rock.
Narrow sheets that cut the host-rock sequence.
Bleached, carbonate-altered or sulphidized contacts.
Interpreted alongside magnetic and conductive responses.
Cross-cutting relationships show veins truncated by dykes.
02 · Rock evidence
Drill core and hand specimens reveal contrasting lamprophyre appearances, from altered fragments and fluid-rich textures to porphyritic dark-green rock.
Core & hand specimen
Taranis interprets the upper core as Mg-rich fluid moving around probable I-1 intrusive fragments; the lower specimen shows a porphyritic mafic texture.
Epithermal quartz–carbonate bodies occupy faults and structures.
Dark lamprophyre sheets cut across the earlier mineralized veins.
Volatile-rich, mafic material interacts with adjacent host rocks.
03 · Mineralogy & chemistry
Automated mineral mapping documents the microscopic assemblage, while whole-rock chemistry places selected drill-core samples within a lamprophyre compositional field.
Mineral-scale evidence
Taranis reports that work completed at the Colorado School of Mines identified phases including albite and amphibole. The source legend and scale are retained.
Whole-rock chemistry
Selected drill-core samples plotted in the compositional field shown on the original Taranis diagram.
High magnesium and iron accompany mafic mineral phases.
H₂O, CO₂, F and Cl are associated with alteration at dyke margins.
Potassium, barium, rubidium, strontium and light rare-earth elements are noted.
Pyrite, pyrrhotite and minor chalcopyrite may affect physical responses.