Mineralized Lamprophyres (Abu Rusheid -Sikait) in Egypt

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The book delves into the geological characteristics of lamprophyre dikes, highlighting their unique physical and chemical traps. It outlines three distinct stages of mineralization: the first involves high-temperature conditions leading to native gold and silver alongside primary sulfide minerals; the second stage occurs at lower temperatures, resulting in secondary sulfate minerals; and the final stage features calcification linked to supergene alteration, producing calcite and uranium minerals.