The Characteristics Of Tectono-geochemical Of The Shuiyindong Gold Deposist And The Application Of Tectono-geochemical Ore-finding In Concealed Ores

The Most important Components of Carlin-type gold deposits in “Yunnan-GuiZ hou-Guangxi "Gold-Triangle" area, Southwestern of Guizhou province,which is locat ed in the intersection of Yangtze paraplatform and South China fold system. Carlin-ty pe Gold Deposit in Southwestern of Guizhou Province could fall into two general ty pes-ore-controlling faults- stratabound according to the attitude?Forms and structure.The body of Stratabound produced in the Fault Fracture Zone of The hiatus in sedime ntation of the Middle Permian and the formation of the Upper Permian.Most of depos its benlong to concealed deposit with buried deep in the earth,and the ore-bodies with distribution features of multi-laye spreading with Bedding Planes, exhibiting a layered structre, quasi-lamellar structure and lenticular.An impure form of carbonate rocks in the coal measures formation with organic-rich and the tectono-alteration rokes of the upper Permian are the mainly gold-bearing rocks.A distinguishing feature of the depo sit is ore-controlling the structures of anticline such as Shui Yindong,NiBao,ZiMudan g(the deep ore-body and the ore-section of Tai Pingdong),and so on.The ore-bodys of ore-controlling faults occurs in the reverse faults with small fault throw that close axis of anticline.They are strictly controlled by fault fracture Zone,the main deposit such a s Lan Nigou,YaTa,BanQi,Zi Mudang and so forth. The Shuiyindong Gold Deposit wi th its own features is a composite concealed deposit with primarily Stratabound as a s upplement ore-controlling faults and is significant constitutes of the Huijiabao Anticli ne Gold Field.On the authority of Tectono-geochemical in prospecting concealed antimony deposit,The research are depend on 1:200000 Regional Geochemical Exploration Data, 1:50000 and 1:10000 Geochemical Soil Survey Exploration Date and eochemical Rock Measurement Exploration Data,and 239 Tectono-geochemicalprofile measure.Then,choose 343 exploratory profiles to work the tectonogeochemical profile measure,it could find out indicator elements of the ore deposit,and provide parameters for characteristic elements which associated with the main ore-forming by R-Clustering analysis and R-Factor analysis.In order to obtain prognosis of concealed ores,after an systematic work including Tectono-geochemical of geological mapping and sampling at the Huijiabao Anticline,use MapGIS to prepar Geochemical Maps and Geochemical Anomaly Map for the score of contour of mineralized of the minerogenetic elements content, it will analysi the font halo and rear halo of the blinded ore-bodies in the deep, Combined with the tectonic ore-controlling regularity.Choice the antcline area where undiscovered Au resources but has an anomaly of Au-As-Sb-Hg-Tl.And predicting for Concealed Ore Body to the unknown area.The major conclusions of this paper are listed as follows:1) The results of R-cluster analysis to 343 exploratory profiles show that the best effective indicator elements of Shuiyindong Gold Deposit,Sorthwestern GuiZhou pro vince,is composed of Au?As?Sb?Hg?Tl?Ag?W.The elements of As?Sb?Hg?Tl indicate dispersion of sulfide mineralized of the primary halos,they are the chalcop hile element and the ore-forming material source of epithermal-mesothermal.the ele ments of Au and Ag stand for the Mineralized factor of their sulfide.element of Ag is an Associated indicator element of element of Au. In short,it indicate gold mineralizat ion closely related to epithermal-mesothermal and silver mineralization.and the front halo of indicator elements of Au are As?Sb?Hg?Ag,and W stand for the rear halo factor.2) The results show that the best effective indicator elements of Shuiyindong Go ld Deposit,Sorthwestern GuiZhou province,is composed of Au?As?Sb?Hg?Tl?Ag?W?Cu.And the main ore-forming elements association is composed of Au- As-Sb-Hg-Tl-Ag-W, There is close correlation between the high score of contour lines and gold body in space coupling which is distributed mainly along near the anticline axis. Besides,The element of U is not the indicator elements of the gold ore-body in this area.3) The results of 239 and 343 Tectono-geochemical profile measure indicates Shuiyindong Gold Deposit is strictly controlled by Huijiabao anticline and Structure and rock.The enrichment space of the ore-bodies was controlled by Huijiabao anticline and Structure fault is the migration paythways of hydrothermal fluid.clay or siltstone of its roof and floor rock formed a well barrier,so,lead to the hydrothermal fluid of the deep ore-bearing walk along structure pathways to effective fraction sediment and mineralization by the manner as diffusion and permeation.4) According to the theory of application of Tectono-geochemical ore-finding methold to the plunge crown of the Huijiabao anticline to enclose and preicat for the gold mineralization targe enclosing.Finally,enclosed the particular prospection area in the section of Zhe Xiang.The gradient anomalies of composite anomaly of Au-As-SbHg-Tl tendency to the dip direction of the concealed ore-body.