WORLD CIVILIZATION

Detailed explanation-1: -The Romans introduced iron tools and used local slaves to mine galena, an important lead ore mineral, from which they refined lead, tin and silver. These metals were used locally and also transported by ship throughout the Roman Empire. Galena was mined from deep mines located in Scotland and Wales.

Detailed explanation-2: -Tin concentrate produced at Greenbushes Mine (WA) also contains tantalum, niobium and antimony. The concentrate is smelted in an electric furnace and tantalum and niobium are recovered from the slag. The tin produced here retains a small amount of antimony and is used for alloys.

Detailed explanation-3: -Chhattisgarh is the only tin producing State in India. Tin ore is known as cassiterite, which was reported in Dantewara district (Bastar district in formerly Madhya Pradesh) by the Directorate of Geology and Mining associated with the lepidolite bearing pegmatites.

Detailed explanation-4: -The majority of tin occurrences are located in the state of Alaska, but tin is known to occur in many other locations in the contiguous United States. The cassiterite ore originates from various lode deposit types, including greisens, pegmatites, skarns, and veins, as well as from placers sourced from these systems.