The relationship of linear-annular image,alteration information characteristics and gold mineralization has been discussed by extracted the remote sensing geological information from the Yangshan gold deposit and its peripheral area using the SPOT,TM data.The distribution of deposits are controlled by regional structure, and the major ore-controlling structure is the NEE-trendingAnchanghe2Guanyinba fault zone.The remote sensing abnormity combination information of wall-rock alteration could indicate the possible p lace of mineralization impersonality, and it has some guide significance for exploration of this gold deposit. Base on the research for the regional mianeralization geological condition of this area,we delineated eight p rospecting targets, fiveⅠ-type prospecting targets and three Ⅱ-type prospecting targets.
Zhongshangou gold deposit is amed ium go ld deposit of Shijiazhuang city in northwestern Hebei No.Ⅰand Ⅱ gold veins are being mined.The depth ofm in ing is 1 100m. Take mantle branch structure theory as a guide, the geological background of go ld deposi,t structural of the ore field, source of oreforming materials, change in plumb direction and ore genesis are analyzed,The result shows that the width of mined deposit becomes bigger and the grade becomes richer with the depth increasing,which illuminate that the depth of the deposit provided with prodigious prospecting potential,so prospecting in the depth of the mine should be paid attention to.
Based on the comprehensive analysis on the geological characteristics of the new fault structure and the geochemical characteristics of its oreformating elements, a new ductile shear zonew as discovery in Jiudian region. The ductile fault was formed in the times between pyrite quartz mineralization period and main mineralization period.As the geological characteristics of the new fault structure was consisted with that of the No.1 zone,the ductile shear zone played trivial role in mineralization, but it w ill bring new inspiration for the research of the correlation between the go ld deposit o f the type of quartz vein and that of fault altered rock in Jiudian region.
The paper described the geotectonic position where Shizim iao gold field located,the exposed strata in the area,magmatic rocks and main characteristics of ore-controlling structure.We have carried out the comprehensive discussion on the geological characteristics of three gold deposits in this gold field, and summarized regularity of mineralization and enrichment Finally, we pointed prospecting criteria and direction,put forward some proposals for future work,according to the geological characteristics of deposit.
Changcheng-type gold deposit belongs to the structure fissure filled hydrothermal deposit,the surface trend
of ore vein is similar to NW-NNE trend of wallrock Changcheng and Lixian system,but the scope and intensity of gold mineralization near to SN orNNE trend,this deny that the mineralization and distribution of Changcheng-type gold deposit are controlled by strata of Changcheng and Jixian system.The research realizes that gold mineralization is controlled by the depth of concealed SN-NNE main fault structure,and prospecting work should be deployed according to this concep tion and regularity,focus on search the deeply concealed metallogenic structure and related mineral deposit and orebody.
The magmatic activity of Yanshan was strong in the middle of umbo of Jiamusi,many hydrothermal gold deposits have been found.We mainly find gold deposit related to metamorphism in the past,but the prospecting work of
magmatic hydrothermal gold deposits are still relatively weak.Jiefanggou gold depositis controlled by magmatic rock of Yanshan movement and it closely related to magmatic hydrothermal activity of Yanshanmovement.This paper sums up the geological characteristics and genesis of ore deposit of Jiefanggou gold mine,points out prospecting direction of future work,and has a guide for exploration of this area.
Xilaokou gold deposit is located in the northern edge of Jiao-Lai basin,the western of Muping-Rushan gold ore belt.The main strata are Paleoproterozoic Jingshan group and Mesozoic Laiyang group.The main magma activity is Yanshan Period,the structure which has a close relationship with gold mineralization is complex.At present,gold resource reserve (333)+(334) has reached to medium size in Xilaokou gold mining,the type of mineralization is altered rock type.This paper analyzes the characteristics of geophysical,geochem ical,ore vein and orebody of ore deposit,it summarized up the regularity of metallogenic and criteria for ore prospecting.According to contrast with typical gold deposit,w e speculate that this area has the condition of forming large mine.
The vein rock of linglong gold field with various types and different scales runs through the whole process of
gold mineralization.The cause of vein rock is considered the products of combined effect of magmatic evolution,construct environment,change of the thickness of lithosphere and mantle,and geological dynamics.The vein rocks of this area are mainly providing heat energy and fluid,and enrich gold partly.
Hongshiquan uranium deposit is located in pegmatitic kali granite which intruded upside strata of Longshoushan group in Lower Proterozoic basement fold zone.The existence of uraninite is mainly uraninite,secondly pitch blende and residual uranium black.By chemic full analysis and correlation matrix analysis,P2O5、TiO2、MgO、Fe2O3、MnO、Tignition loss are greater positive relativity to uranium.Multiple correlation coefficient of metallogenic age is 0. 9999 by three phase model,which indicates the metallogeny close to diagenism era,belongs to the product of Lvliang movement.Biotitization is primary mineralization phase,there are zircon and clipper built inclusions in biotite.The deposit genesis should be multiphase replacement hydrothermal deposit that concerns with migmatitization in combine diagenism phase migmatitization and mineralization phase.According to formation process of deposit,the uranium source mostly comes from deep lava and siliceous kaliceous solution.
Based on the characateristics and occurrence regularity of No.3 altered metallogenic belt in Sizhuang gold
deposit,using pumping dilute method of engineering network degrees,we chose No.3 altered metallogenic ore belt which is located in the middle part of -280, compares and analyses the change relationship among of area overlapping ratio of different network degrees,area error,reserves error and the number of projects.Finally,we determine a reasonable exploration degree and the distance of exploration engineering.
Xinli mining area of Sanshandao gold mine is a hard rock mine,which carries out submarine mining firstly
in China.According to the comp licated mining technical condition of Xinli mining area,fuzzy comp rehensive evaluation approach is applied to optimize mining method.Quantitative analysis the evaluation index of various mining scheme,so that the evaluation and selection of mining program more scientific,reasonable and reliable.
This paper discussed several problems about designing and construction technology of static shrinkage method,which is tested and researching atQianhe gold mine in 2008.We put forward some op inions, including technique of three intensifying operation,the recoverymethod of triangle ore heap,hangingwall rock bolting support and removing ore from stope orepass,which can supply a reference for related engineering personnel and extended application.
Trace gold is concentrated with foam plastics, by extrication of sulfur thiourea solution, using the technology of slope-heating and pyrolytic coated graphite tube formeasure trace gold by Z-2000 graphite furnace atomic absorption spectrometry(GFAAS),we discuss the influences of standard curve and working curve on the determination result.By standard recovery experiment,variousmethods compare and determination of the first class national standard materials,the detection limit of the method is 0.1×10-9,the recovery rate is 96%～110% and the p recision is 3%～11%,which satisfy analysis requirements of trace gold in 1∶50 000 geochemical sample.
With the print mapping model of SURPAC software,the automated mapping of production process of Jiaojia
gold mine wasmade.The using efficiency of different model and different function of SURPAC software was improved,and the labor intensity of technicianswas gradually reduced,in order to better guide the production of mine.
After long—term observation and analysis，we learn the factors of affect the international gold price fluctua—
tions are as follows:the trend of gold and U．S．dollar is closely related,gold and dollars have great negative orrelation.Gold prices are affected by the international oil prices,central bank gold reserves policy,the rate of inflation,political factors and war produce fluctuations.In the gold market,the foating capital flows and fluctuations of gold prices show closely association.At present,conditions are benefit for gold prices,therefore,we can foresee the gold market has a bright prospects．
Starting from the actual conditions ofmine construction,we discuss the scheme of ore-transportation about
Jiama copper polymetallic inMozhugongka country,which is under construction,combined with the region characteristics of Tibet.Finally,we consider that automobile transportation is the best scheme.
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