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This contribution presents a brief review of the North American activation metallogeny, com parable with the Chinese diwa. Three types of mineralized terrains are treated:1) Regions of largely “cold” (proximal intrusions absent) Pb-Zn, fluorite and barite minera lization in carbonate-dominated platforms resting on Precambrian crystalline basement. There, seve ral varieties of ores often lumped together under the designation of “Mississippi Valley type” are most common.2) Regions of “cold” uranium infiltrational mineralization in porous sandstones in the block -faulted Wyoming Foreland Belt.3) Regions of “hot” activation in intracontinental mountain and orogenic belts, intruded by small high-level calc-alkaline to alkaline intrusions and discontinuously covered by volcanic fie lds. The Colorado Rocky Mountains are described in greater detail and additional regions in North America are briefly listed.
This contribution presents a brief review of the North American activation metallogeny, com parable with the Chinese diwa. Three types of mineralized terrains are treated: 1) Regions of largely “cold ” (proximal intrusions absent) Pb-Zn, fluorite and barite minera lization in carbonate-dominated platforms resting on Precambrian crystalline basement. There, seve ral varieties of ores often lumped together under the designation of “Mississippi Valley type” are most common. 2 Regions of “cold ” uranium infiltrational mineralization in porous sandstones in the block -faulted Wyoming Foreland Belt.3) Regions of “hot” activation in intracontinental mountain and orogenic belts, intruded by small high-level calc-alkaline to alkaline intrusions and discontinuously covered by volcanic fie lds. The Colorado Rocky Mountains are described in greater detail and additional regions in North America are sorted listed.