The Establishment Of Fe-Pb-Zn Prospecting Model Of Maizi Basin And Selection And Evaluation Of Prospecting Target,Xinjiang

The Maizi volcano-sedimentary basin is located in the south margin ofthe Altay orogenic belt, which is all kinds of metal mineral rendezvous andcontains rich much metal resources. the author summarized the thetypicalore deposit for ore deposit geological characteristics,geochemicalcharacteristics, genesis and metallogenic model of regional on the basis ofprevious work. Acidic volcano-sedimentary rocks is mainly ore rock, orebody is controlled by the output of stratum, structure and lithology, Oreminerals are simple, the main metallic mineral is galena, sphalerite, pyrite,magnetite, magnetic pyrite. The characteristics of Submarine volcano plumedeposition-later hydrothermal superimposition-transformation is a typicalgenesis of ore deposits.Ore-forming metals come mainly from the volcano sedimentary stratawith higher Pb,Zn background value. Sulfur isotope(-15.3‰-+5.1‰)indicating the source of reduction sulfur is much more extensive in processlead-zinc mineralization Speculate the main metallogenic time mainlyconcentrated in the late Paleozoic based on the field geologicalcharacteristics of deposit and results of metallogenic time determinated byRb-Sr isochron method. Mineralization events related with oceanic crustsubduction caused by closure of Asian Ocean. On this basis, establishprospecting model and select the target area for prospective evaluation bymeans of geological, geophysical, geochemical and geochemistry.Metamorphic rocks geochemistry of Tarcrystal tuff crystal tuff get areashows that the original rocks of metamorphic rocks is andesitic tuff,rhyolitic crystal tuff, keratophyre, marlite and clay rock, etc. Comparisonof regional stratigraphic column diagrams show that strata in mining areasdominated by D2k2and the group of D2k2is the main Pb-Zn ore-bearingstrata on the area. Outlining the two mineralization-alteration belt based onprimary halo characteristics. The characteristics of No.1mineralization- alteration belt mainly shows Cu exception and partial emergence of Ag,Pb,Zn anomaly. No. II mineralized belt mainly display Ag, Pb, Zn, Asanomaly. The lithology is marble with Fe-Mn,schist, Chert, light rock,ect.Integration of anomalous characteristics of prospecting result, determine thetarget area has good prospects of discovering Submarine volcano plumedeposition.