Jiang Weng Waves Altered Rock Type Gold Deposits In Deformation And Ore-controlling Law

With the open country geological investigation,the typical model section research and the indoor observation analysis test,we obtain the massive materials and data of Wenlang gold deposit.In the materials and data foundation,we conduct the analytical stodys to Weniang gold deposit's rock deformation characteristic,Au and other elements' migration rule.Based on this,we summarize Wenglang gold deposit's structural-control model and obtain the following several understandings.1.The occurrence features of Weniang gold orebody mainly present banding,likelihood stratification and lens.Its gold orebody is strictly controlled by tectonics.The occurrence concrete tectonic position of gold orebody is a strong strain band of interlayer sliding belt in the area between the first segment and the second segment of Jialu Formation of the Xiajiang Group of Neoproterozotc Qingbaikouan.With the study of the open country typical tectonic model section, the stratum of Jialu Formation suffered a strong interlayer shear.In addition,because the influence of the rock natural is so different,the tectonic zoning phenomenon is obvious in the shear zone.The gold orebody gathers in the band of rock deformation relatively strong and strain relatively concentratedly.2.According to the kinematics analysis of the mining area and typical model section in the open country and a series of structural lens and the S-C structures under the optical microscope in the lab,we know that the kinematics characteristic of the interlayer sliding belt which controls the gold orehody is thrust-type.3.According to observation of typical model section in the open country and massive analyses under the optical microscope in the lab,we can see that the ductile deformation characteristic of Wenlang gold deposit is obvious.Under the optical microscope we can see a lot of ductile deformation petrofabrics,such as structural lens and the S-C structures.It shows that the major rock deformation characteristic of Wenlang gold deposit is ductile.4.With the study of major elements and trace elements'correlation,volume-tric factor and migrating rule,we get that tectonic geochemistry analysis to the samples which come from different tectonic zonation manifests that major elements P₂O₅,Fe₂O₃,MgO,Na₂O,CaO transfered from simple deformation zone to complicated deformation zone and superposed lens zone and trace elements transfering to complicated deformation zone and superposed lens zone include thiophile elements Au,Cu,As,Bi,Pb,Zn,T1,In and siderophile elements Mo.The other way round, major elements SiO₂,MnO,K₂O,FeO,TiO₂ transfered from complicated deformation zone and superposed lens zone to simple deformation zone and elements of Nb,Hf,Sr which are impacted deeply by alteration moved into simple deformation zone.5.With the study of the occurrence feature,ore controlling structure and migrating rule of elements,we can found a structural-control model of the resembling Wenlang gold deposit area of southeast Guizhou,which is gold orebody is controlled by multilayer ore controlling structure of strain relatively concentrated band.