| Based on the geologalic investigation in the field and lots of analysis data in thelaboratory, and the studying of regional geology and structure background ofDashuigou Te deposit,we made a deep study of ore-forming geochemistry processand ore-forming geochemistry mechanism.This study covers regional geology, the physicochemical condition ofDashuigou Te deposit area, trace element in mineralization field,isotopicgeochemistry, the transport forms of Te,the deposit geochemistry mechanism of Teand the ore-forming geochemistry mode,and so on.the study results has show that asfollows:1.the Te deposit formed in the linkup of the plates and active of the deep-faultsand tectonomagmao This place can provide with enrich materials and enoughreservoir space for the ore-forming and activity place for the solution.so it isadvantaged for forming Te deposit.2.the forming of the Te deposit has close relationship with the space time.3.the mineralizer came from mantle,and the solution from magmatichydrotherm.4.the study of the inclutions shows that the Te deposit is a type of meso-hightemperature,mesogene magmatic hydrothermal filling deposit.5.the process of ore-forming was a process of T and P falling.as the falling of Tand P, pH, fo2, fs2, fTe2come down,and the Eh rised.6.Te was transported by H2Te, HTe- in the solution,and precipitated from thesolution when physico-chemical condition were changed—T,P,pH,fo2,fs2,fTe2 came down,Eh rised.
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