Ore-controlling Structure Characteristics Of Brittle-ductile Shear Zone And Metallogenic Regualarity Of Gold In Jindoupo Hanyin County-liushuping Hanbin Area,South Qinling,China

Based on the projects of “study of Jiangjunhe-Hanbin Liushuping Silurian structure-lithofacies mapping and Au metallogenic Regularity of Shiquan county in Ankang,Shannxi ” and “A study of Changgou gold deposit prospecting prediction about the key area of the whole-mount exploration in Shiquan-Xunyang, Shannxi”, This paper researches the ore-controlling structure of the Liushuping gold deposit area of the Jindoupo-Hanyin and Baiguoshu-Hanbin region in the north of Hanyin county.In the field geological research,we comprehensive use the ore field structure,According to the new study approaches of regional structural deformation analytic method,And using the geological route survey,Structural section measred,The large scale structural-lithofacies mapping and the other new methods to do some geological research.Indoor through fully summary and analyze the data of predecessors’,And the two projects of field exploration data,The laboratory microscope thin section and the light tables mineral identification,The phenomennon of microscopic structure observation,The fluid inclusions in quartz vein test,The electron probe component ananlysis of special deformation metamorphic minerals,Material composition analysis and many trials were carried out in other ways and means to study,To analyze the characteristics of brittle-ductile shear zone,the characteristics of ore-controlling tectonic,the ore-controlling factors,And analyze its relationship with gold ore bodies and summarized the gold metallogenic regularity of the three gold field..Mainly obtained the recognition and the following results:1.Through the field structure and lithofacies mapping,Divided into brittle- ductile shear zone distribution range of DSZ1(RF3),And it can be divided into three secondary brittle-ductile shear zone,we named them RF3-1 and RF3-2 and RF3-3,And found that the formation and distribution of gold ore bodies strictly by the belt brittle-ductile shear deformation zone cut DSZ1(RF3) control,Brittle- ductile shear zone on the overall control the output and enrichment of the ore body parts;Secondary brittle-ductile shear zone with brittle structure closely associated with gold mineralization,Gold ore bodies and mineralized bodies development mainly in the ductile shear zone in the secondary brittle- ductile shear zone RF3-1,Gold ore body in the study area output parts often have brittle structuredevelopment,The author thinks over the same period of shear zone or slightly late development of brittle structure further impact on the element of gold activation,Migration and enrichment.On the study area,we found S2 surface direction more stable as a whole.when it nears the gold orebody S2 surface fold deformation occurred,Face direction and tendency of change is more obvious,And the ore body generally output along the S2 face,The S2 surface control the output form and characteristics of the ore body.2.Through the LiuShuPing quartz vein of fluid inclusions in the test,The first classⅡquartz inclusions homogenization temperature range between 191.3℃to 455.3℃,In general belong to high temperature;The first class Ⅲ inclusions homo genization temperature range in 171.1℃to 454.1℃,The range is very large,Can be subdivided into170℃~270℃,Belong to the low temperature;Between 350℃~370℃,Belong to the high temperature.TheS2 phase of quartz inclusion body of the north of ankang and the S2-1 phase of LiuShuPing region all show the characteristic of low temperature and low salinity,Has the characteristics of the modified hydrothermal. Comprehensive analysis of S2-1 phase of quartz vein and closely related to the formation of gold deposit.3.Through the action of Jindoupo mine garnet and biotite phenocryst electron probe experiment and geological thermometer,Estimate of the garnet- biotite gets phenocryst metamorphic temperature about 360℃ ~ 500 ℃,Metamorphic temperature is higher,Adjacent near LiuShuPing favorable metallogenic quartz inclusions in the test temperature is230 ℃~310 ℃,Gold mineralization temperature is in low temperature,Belongs to the low temperature deformation metamorphic stage of the thermal fluid migration,Enrichment and mineralization.Action of garnet within jindoupo gold deposit area in northern saw a gold ore bodies,Garnet LiuShuPing mining area development of peripheral saw a gold orebody or gold mineralization body distribution,Thinks the research area has prompted garnet- biotite phenocryst development of thermal metamorphism on the formation of gold mine has the positive significance.4.The action of Jindoupo and the chebangou mining section of Baiguoshu gold deposit area,And LiuShuPing mining of gold ore body shape is different,Action gold orebody south west side Jindoupo mining area development,the Chebangou mining section of Baiguoshugold deposit area ore block gold orebody mining area to the south east side development,LiuShuPing gold orebody mining area to the south east side development.So the same of different parts of the brittle- ductile shear zone gold orebody distribution forms are different.5.The main ore-controlling factors research area gold ore body are:(1) brittle- ductile shear zone construction controlling,Specific subdivided into:1) brittle- ore-controlling ductile shear zone within the strong strain area;2)Brittle- ductile shear zone in parts of the ore-controlling occurrence mutations;(2) the brittle structure superposition controlling;(3) the strata, lithology controlling;4)Thermal metamorphism and alteration ore-controlling role.