A Study On Zoning Xenoliths And Their Relationship To Mineralization From Damaping Of Hebei Province

The geology and geochemical character of different type zoning xenoliths from da-ma-ping of Hebei Province have been preliminary studied,and nickel,gold,molybdenum and tungsten contents of different zoning in different type zoning xenoliths have been systematically analyzed. By ideas and methods of comparative geology of mineral deposits on the basis of the result,discussed the elements of different geochemistry character components in the manltle of lithosphere and relations to metallogenesis, some new developments and understanding as follows:1. In the different zoning of xenoliths,from peridotite to pyroxenite, nickel content decresed; compared to gold, the nickel trend enrichment in ultrabasic rock and the nickel content higher in the clearer boning. It reflected the nickel trend enrichment in mantle ultrabasic rock and magmatie differentiation be propitious to nickel first enrichment.2. The distributed of gold in the different zoning of xenoliths are inhomogeneous; from peridotite to pyroxenite, gold content incresed; in the transition belt of iherzolite,the sample emerged high positive anomaly; the content of gold in zoning clear is lesser. It reflected the gold is middle incompatible element,was enriched in high pyroxene component stage in the course of magmatie crystallization or partial melting,the transition belt be propitious to enriched gold.3. In the different zoning of xenoliths, molybdenum and tungsten contents is lower and homogeneous,and be lower than the world's average abundance; tungsten compared to molybdenum,the content more homogeneous in xenoliths, compared to mantle's average abundance more less. This explains the geochemistry incompatible character homophyly and diversity of molybdenum and tungsten determined their trend enrichment in crust in the course of the mantle evolution and magmatism, among molybdenum more trend enrichment in lower crust but tungsten in middle-upper crust.Nickel,gold,molybdenum and tungsten contents diversity in the different zoning of xenoliths and corresponding different ingredient xenoliths whole rock's contents, metallogenesis in different characteristic geologic body is accordant. It is relations with the form ,evolution of lithosphere and the element's geochemical properties. The study of nickel, gold, molybdenum and tungsten contents in zoning xenoliths have important significance to discuss nickel, gold, molybdenum and tungsten depoisit ,cheir distribution rule and exploration, predict.