Caixia Mountain, Xinjiang Pb-zn Deposits Geological Characteristics And Genetic Mechanism

Xinjiang region locates the our country northwest, having the national territory land total area of 1/6, is one of the main regions that develops greatly western region. TianShan raetallogenic belt is the most important and in the Central Asian region one of metallogenic belt, especially East TianShan mountain areas have been classified as National 16 countries to focus on five areas to the one. Xinjiang is rarely found lead-zinc deposit, forces the lead-zinc mine besides the keketale lead-zinc deposit in Altay to achieve large-scale, other deposits "few small", with Xinjiang vast in territory, the mineralization condition good pattern is not symmetric. The detection of the Caixiashan lead zinc deposit, may say has filled east Tianshan geology prospecting one "the blank". Therefore, conducts the Caixiashan lead zinc deposit geological feature and the origin question, not only has the important reference significance, also is helpful to the next step geological prospecting work.This text passes the research toward Caixiashan lead-zinc deposit geology characteristic, combine its geochemistry characteristic analysis, the first step study Caixiashan lead-zinc deposit of cause of formation.Caixiashan lead-zinc deposit locates in the center a piece of median mass of Kawabulake-Xingxingxia. Stratum of bearing ore is shallow-sea facies fragmentary rocks and carbonatite construct,the activity of ore area fracture is multifarious, belong to shallow layer brittleness, toughness-brittleness shear fracture zone. Because stratum with fracture antivity of good match, cause the rich ore body mainly be take seat in the fragmentary rocks and marble of ruptured zone, incline toward a cheery marble of the chemistry property one side.Lithology research shows that wall rock is dolomite marble or silica rock greatly regardless, widespread experience to activate a reformation for many times, have something to do with wall rock alteration to become of the mineral mainly is the dolomite and the quartz of recrystallization. The ore body presents nervation, net nervation, podiform more to produce, is controled by fracture. Combine the ore frame and structure, according to the ore and mineral combination, the formation that thinks the deposit experiences the metallizing phase of hot liquid , the transformating phase of kinetic metamorphism and hypergene phase three period times.The isotope geochemistry research indicated that, the sulfur isotopic content indicated the sulfur main origin in the magmatic sulfur, and has the few sea water reduced sulfur and the biological reduced sulfur; The oxyhydrogen isotope research indicated the ore fluid host metallizing phase mainly is in the stratum construction water; The lead isotope research indicated the ore lead, the rock lead (intrusive rock and stratum) all have the characteristic which the shell-mantle mix originates, forms in the orogenic zone environment, had reflected the metallogenesis makes...