Tungsten ore veins cutting granite at Cligga Head

The reaction of tin/tungsten chloride-bearing fluids with granite produces economically important greisen veins. The mine at Cligga head in the St Agnes region of Cornwall was the main source of Britain's tungsten during the first part of the 20th century and the sub-economic veins left over provide a perfect example to see how the late-stage hydrous fluids from the intrusion interacted with the cooling granite to produce the important ore minerals cassiterite and wolframite.

Видео Tungsten ore veins cutting granite at Cligga Head канала OneMinuteGeology