The mechanisms and time scale of alteration halos in vein-type tungsten deposits in southern China

Alteration halos are the fingerprints left by hydrothermal flow in rocks and indicative of ore forming processes. The Nanling Range in southern China is a world-class tungsten province. However, it is poorly understood why alteration halos normal to veins in many tungsten deposits in the area decrease with increasing depth, and the time it takes to form the halos. Finite element based numerical experiments were conducted to investigate...