Ore genesis accumulation of hematite gravels called "pisolites" which form channel-iron deposits. These are preferred because they are cheap to mine. Lead-zinc deposits are generally accompanied by silver, hosted within the lead sulfide mineral galena or within the zinc sulfide mineral sphalerite. Lead and zinc deposits are formed by discharge of deep sedimentary brine onto the sea floor (termed "sedimentary exhalative" or SEDEX), or by replacement of limestone, in skarn deposits, some associated with submarine volcanoes (called volcanogenic massive sulfide ore deposits or VMS), or in the aureole of subvolcanic intrusions of granite. The vast majority of SEDEX lead and zinc deposits
Mineral industry of Europe a row; the increase was 2% from the previous year, and production amounted to almost 89.1 million tons. Of all the global market mining of ore, eastern Europe was the smallest region accounting around just 1% of the market, the use of robots in the metal ore mining industry is improving the efficiency and productivity of mines and reduces operational costs. The EU metallic mining sector produces a wide range of ores yielding metal substances. Mineral industry of Europe The European mining industry has a long tradition, right now it is by far the continent's most modern and innovative industrial