2015 Minerals Yearbook
Niobium Columbium, Tantalum, and Tungsten. In the first half of 2015, 3T Mining Ltd. was mining wolframite and columbite tantalite at the rates of 70 t/yr and 21 t/yr, respectively.pany, which started mining in 2015, had a processing plant at its Wampero Mine in Waksio district with a capacity of 120 t/yr of columbite tantalite.



































