Non-coal mines are prone to fire accidents due to the fragility of the mine system and the high temperature of the mine.It is important to improve the fire contingency professional skills of mine operators through contingency training, which plays an important role in the prevention and control of mine fire accidents.However, the traditional contingency training has the disadvantages of single form, poor training effect and difficulty in realizing some training contents, so this paper developed a non-coal mine fire contingency training system with comprehensive functions and strong interaction using virtual reality technology.A mine fire contingency training system functional framework consisted of four basic subsystems,namely project introduction subsystems，accident scene experience subsystems,personnel role experience subsystems and comprehensive assessment subsystems is designed.And a mine fire training system is constructed whose functions include the virtual roaming before the fire, the scene experience when the fire occurred, the evacuation,contingency rescue,post-disaster treatment after the fire,and comprehensive assessment and evaluation after learning and training.3Ds Max 3D modeling software and Unity3D game engine are utilized to establish a virtual scene of mine fire，and the C# language script programming and HTC VIVE head-mounted display device are applied to realize the interaction between trainee and the mine fire virtual scene thus the system is developed, and conducting indoor test and field test for evaluation on the system effect. The results of the indoor test evaluation show that the user experience indicators of the VR training system are generally 2 to 4 times of the PPT training，and its immersion indicator is 22.5 times of the PPT training. The training effect indicators are generally 1 to 2 times of the PPT training, and 90% of the tested students prefer the mine fire emergency training system based on VR technology.While the field test process equipment is stable, mine operators have a strong interest in the VR training system and stronger willingness to learn actively, and most of them mentioned that they can be proficient in operation system and understand the training content of the system easily.It shows that the mine fire contingency training system based on VR technology can bring better user experience and training effect, improve the efficiency of mine fire contingency training effectively, and is more popular than traditional training.The VR training system has the characteristics of low cost, easy acceptance and flexible training methods, which can achieve good training results and strengthen the fire emergency professional skills of mine operators.

Environmental-friendly reagent Jinchan was used as a substitute for sodium cyanide to treat Xiajiadian gold mine,and the leaching effect of Jinchan and sodium cyanide was compared.The results showed that the leaching rate of Jinchan and sodium cyanide was 88.55% and 88.73% respectively,which was basically the same when the dosage of reagents was 200 g/t；When Jinchan dosage was 300 g/t，the leaching rate of 89.87% could be obtained，which was obviously better than the leaching effect of sodium cyanide under the optimal conditions；When using Jinchan，the adsorption and desorption effects were the same as that of sodium cyanide,with gold desorption rate of 98.99% and 98.97%, respectively；Jinchan as a substitute for sodium cyanide，could significantly improve technical and economic indicators，and moreover，in view of the non-toxicity of Jinchan，the invisible benefits of transportation，management，environmental protection and safety also would be obtained.

The radical feature of resources Zijinshan Gold Mine is introduced in this paper; Technology of evaluation and exploration of Lower grade resources is narrated emphatically; Important experience of lower grade resources evaluation and exploration is based on in practice.

During the 1990s，with the deepening of research and exploration of carlin-type gold deposit in China on the basis of the connotation of carlin-type gold deposit，some gold deposits were discovered and redefined as carlin-like gold deposits.This is a class of gold deposits that show similar geological characteristics to the carlin-type gold deposit，but their geochemical characteristics are obviously different.The Zhaishang gold deposit located in the western part of the Li-Min metallogenic belt within the western Qinling Mountains is a very important carlin-like disseminated gold deposit.Since it was discovered through geochemical anomaly information and civil mining information in 2 000，many workers have carried out geological，geochemical，geophysical，remote sensing，engineering and other aspects of exploration，as well as researches on mineral composition，texture and structure of rock，orebody distribution，fluid source and ore-forming conditions，showing the superior metallogenic geological conditions and great prospecting potential of the deposit.Based on a large number of field work data and analysis of ore-forming characteristics in the mining area，we mainly studied the No.31 vein and the Zhamashu ore section in the South ore belt，taking the measurement and analysis of structural traces of different scales as the basis.On the basis of the analysis of the ore control law of the structure，the “three in one” ore-forming model of ore-forming geological body，ore-forming structure，ore-forming structural plane and ore-forming characteristics was summarized to guide the prospecting systemati-cally.The results of field observation and statistical analysis on the structural fissures of the Zhaishang gold deposit show that the most developed joints are in the NW-SE direction of 106°~137°，and the joints in the NE-SW direction of 196°~229° come second.It is indicated that the SN-trending compressive stress in Indosinian period，which is an important structural period of the gold deposit，formed most of the joint fractures of the deposit.And the deposit is mainly formed in Indosinian and Yanshanian tectonic movements，the orebody is controlled by folds，faults and strata.In Yanshanian period the deposit was mainly controlled by NE-trending positive torsional stress，which led to the successive activity of NW-trending structure formed in the Indosinian period，the emplacement of magmatic hydrothermal fluid along fractures，the mixing of atmospheric precipitation，and the superimposition of mineralization on the early orebodies.

Pyrite is the main gold-bearing mineral in Longtougou gold deposit.In this paper，the crystal morphology and chemical composition typomorphic characteristics of pyrite in Ⅰ-1 and Ⅳ-1 orebodies were studied from the perspective of minerals，and five points of insights were obtained.The research methods include optical thin section observation under microscope，electron probe，energy spectrum analysis，etc.The results show that the crystal morphology of pyrite in the study area is relatively simple，and pentagonal dodecahedron crystal morphology occupies the highest proportion.In general，the probability of pyrite crystal morphology from high to low is pentagonal dodecahedron，poly，cube and octahedron.The 1 160 m middle section of the study area is the most mineralized section，and the 1 080 m section is the secondary mineralized section，and pentagonal dodecahedral pyrite is superior to other crystal morphology in gold bearing.The w（S）is 52.71% to 67.80%，with an average of 55.79%，and the w（Fe） is 28.66% to 45.33%，with an average of 42.43% in pyrite.In general，the pyrite in this area is sulfur-rich and iron-deficient.Co/Ni values range from 1.383 to 13.333，with an average value of 2.88，w（Se） is about 4×10^-4，and S/Se ratios range from 0.76×10³ to 5.39×10³，indicating that the formation of Longtougou gold deposit is related to volcanic hydrothermal genesis.The score X of crystal morphology and D value range from 0 to -13.33 and 0.6520 to 1.1345 respectively，indicating that the ore body is basically located in the middle and lower part，that is，the engineering control section of the mineralization area is still in the middle and shallow part.There is still prospecting potential in the east of line 131 below 1 080 m middle level and Xianggou area to the west of Longtougou gold area.

The area of Chinese permafrost accounts for about 21.5 percent of the land area，ranking third in the world，and the permafrost area at high altitude accounts for about 80.6 percent of the permafrost area in China.Under the guidance of the national grand strategy，infrastructure construction in these areas has been greatly developed these years，but at the same time，the special geographical environment of the cold region puts forward a new test for the safety，stability and durability of rock mass engineering.In order to reduce the occurrence of engineering accidents and ensure public safety，it is of great significance to figure out the connotation differences and research progress of the freeze-thaw damages of rock and rock masses.By referring to the latest research results in the field of rock and rock masses freeze-thaw damage，the differences between rock and rock masses freeze-thaw damage are clearly defined，and the research status of freeze-thaw damage of rock and rock masses is systematically summarized and sorted out from three aspects：Physical and mechanical properties，freeze-thaw damage theory，constitutive model.It is found that the freeze-thaw damage mechanisms of rock and rock masses are remarkably different due to the various internal structures，spatial scales and distributions of fractures，and the corresponding criterions for damage evaluations are also different.From the perspective of connotations，the damage of rock results from the formation of microcrack and belongs to the microscopic scope（with a scale of millimeter or less），but the damage of rock masses is mainly influenced by fractures（with a scale of centimeter or more）and falls into the macroscopic scope.The current studies related to the freeze-thaw damages primarily focus on the intact rock blocks，and few researchers investigate the rock masses containing macroscopic fractures.Rock failure is due to the combined action of the frost heaves of in-situ and migratory water，and therefore the constitutive model of rock freeze-thaw damage is mainly built in the perspective of frost heave forces and fatigue damages.In the future，the influences of factures should be pay more attention.Starting from the microscopic scales，the mechanisms of water migrations and frost heaves and the laws of interaction in microcracks and fractures under the process of freeze-thaw cycles should be analyzed by laboratory experiments.Meanwhile，the constitutive model of freeze-thaw damage of the large-scale rock masses should be built by the numerical simulation and field tests.In this way，the evaluation system of freeze-thaw damage of rock and rock masses in cold regions could be formed.

The pretreatment methods for gold-bearing sulfide ore mainly include roasting，biological oxidation，pressurized oxidation，acid oxidation，alkaline oxidation，etc.The alkaline oxidation process has become a research hotspot in recent years due to its many advantages，such as low requirements for equipment，simple flowsheet，environmentally friendly，low production cost and so on.The authors found that while the sulphide minerals oxidized，gold simultaneously had been dissolved mostly in the process of gold concentrate alkaline oxidation.Through the analysis and research on this phenomenon，the sulfide anions，such as S_x^2- and S₂O₃^2-，were thought to play a major role for dissolving gold.Therefore，a technical idea of synchronous gold extraction from gold-bearing sulfide ore by self-coordination of gold and sulfur.So，the author has extensively consulted relevant research materials at home and abroad.These studies have focused on oxidation and passivation of sulphide，leaching and passivation of gold，etc.，and the mechanism of gold leaching in alkaline sulfur-containing solutions were presented from different aspects，including thermodynamics analysis，electrochemical dissolution，and leaching kinetics.Research methods involves SEM，XPS，EQCM，XAFS，etc.The main conclusions drawn from these research materials are as follows：Firstly，in alkaline solutions，sulfide is easily oxidized to polysulfide and thiosulfate，which can solubilize gold.But these polysulfide ions are unstable and will eventually be oxidized to stable forms such as sulfate and sulfite in the presence of oxygen.Secondly，both gold and sulphide can be passivated in the alkaline oxidation process.Sulphide can be oxidized generate Fe（OH）₃，FeAsO₄ and other precipitates，which forms a passivating layer on the surface of sulfide minerals and gold，preventing the further oxidation decomposition of sulphide and the dissolution and leaching of gold.Passivation inhibition can be reduced or eliminated by mechanical stripping or by adding appropriate dispersants.At present，researches on gold-leaching by the alkaline oxidation of gold-bearing sulfide ores are more，and leaching system involves the NaOH-NaClO-NaCl system，NaOH-NaCN system，NaOH-Na₂S-S system，NaOH-S_x^2– system，copper-ammonium thiosulfate system，alkaline thiourea system，etc.Generally，a better gold leaching rate can be achieved in laboratory，but there are problems for industrial application，for example，dosage of lixiviants is high，gold-leaching ions is unstable，the catalyst is needed and so on.How to effectively reduce the useless consumption of lixiviants is the key to the wide application of alkaline sulfide gold leaching technology.The mechanism on dissolution and passivation of sulfide and gold in alkaline gold-leaching system were systematically summarized and analyzed.On the basis of own research the authors put forward the technical idea of self-coordination simultaneous dissolution of gold and sulfur from sulfide ore.Namely，we can directly leach gold in alkaline leaching gold system by utilizing the sulfur of gold-bearing sulfide ores，which are oxidized to generate polysulfide and thiosulfate having the ability to oxidize and coordinate for the gold.This technical idea likely is an effective way to solve before-mentioned problems for industrial application.Some data indicate that gold was enriched and precipitated out from sulfide minerals during crustal movement，instead of being transported by metamorphic pyrite.It suggests that in certain magmatic hydrothermalism conditions，sulfur and gold of sulfide ore likely had ever formed some gold-sulfur compounds.On the base of geological form causes analysis for the gold-bearing sulfide ore，the author points out that the sulfide ions are likely to be effective lixiviants to replace cyanide for the gold leaching.The author also discusses the key scientific and technological problems that need to be solved in this field，and points out that oxidizing sulfide to convert into polysulfide and thiosulfate and keeping the stability of the gold-sulfur complexes are the most important problems to be solved in this technique.

Many gold deposits have been found in the western section of East Kunlun Mountains in Qinghai Province.This area is characterized by complex geological structure，frequent magmatic activity and excellent metallogenic conditions.The geology and prospecting potential of gold deposit were carried out and the metallogenic regularity of gold deposits was preliminarily summarized in this area.However，the late discovery of the deposit and inconvenient natural conditions restrict the systematic study of the genetic types of gold deposits and the establishment of the metallogenic model of the main types of gold deposits in the area，which seriously restricts the breakthrough of gold exploration.Based on the classification of gold deposits at home and abroad and the 27 gold deposits（points） discovered in the study area，this paper determines that the genetic types of gold deposits in the study area are orogenic type，contact metasomatic type，post magmatic medium and low temperature hydrothermal type and mechanical sedimentary type.Among the 27 deposits，there are 18 orogenic gold deposits，accounting for two-thirds.The estimated resource of orogenic gold deposits accounts for 51%.Therefore，orogenic gold deposits are the most important type in the western section of East Kunlun.Through the analysis of metallogenic environment，it is considered that orogenic gold deposits in the area mainly formed in the Late Triassic.Deep fault is the main ore controlling structure，while ductile shear zone，secondary brittle fault，structural fracture and interlayer fracture zone are good ore storage structures.The ore-forming materials come from the background of post collision compression strike slip，and tectonism provides the basis for the accumulation and precipitation of ore-forming materials.Through the study，the metallogenic model of gold deposit in the study area is preliminarily established.Regional metallogenic model of gold deposit manifested as：In the Triassic collision-post collision stage，the regional crust mantle interaction strongly formed the mantle crust derived granite and its related gold mineralization system.The main types of gold deposits are contact metasomatic type and post magmatic medium and low temperature hydrothermal type，which occur in the outer contact zone of the rock mass and the top of the rock mass respectively.The former is such as Haxiyatu deposit and Tawenchahanxi deposit，and the latter is such as Kude’erte deposit.At the same time，the whole region is under the condition of compressive strike slip deformation tectonic stress，and the deep and large fault activity is strong，which leads to the deep metamorphic hydrothermal solution and controls the development of ductile shear zone.The deep metamorphic hydrothermal fluid moves upward under the control of the ductile shear zone. In the process of metamorphism，the ore-forming materials dispersed in the formation rocks are activated into the metamorphic fluid and become the gold initially enriched in the ore bearing hydrothermal medium basic volcanic rocks and other rocks，forming the gold bearing metamorphic hydrothermal fluid.In the ductile brittle deformation transition zone of ductile shear zone，or its side brittle fracture，structural fracture and interlayer structural zone，due to the reduction of pressure and the temperature of gold bearing metamorphic hydrothermal solution，gold and other metallogenic elements precipitated and formed orogenic gold deposits.After the Late Paleozoic-Early Mesozoic orogeny，the region continued to develop intracontinentally （basin mountain transformation），the mountains rose strongly，and placer gold deposits were formed in Cenozoic.

The newly-discovered Qianhongquan gold deposit is located in the southern part of the Beishan orogenic belt，but there is a lack of accurate constraints about its metallogenic epoch.In this work，the altered sericite from the ores of this deposit was dated using ⁴⁰Ar-³⁹Ar.The ⁴⁰Ar-³⁹Ar plateau and isochron ages of the altered sericite are （250.4±1.0）Ma and （251.3±1.1）Ma，respectively，indicating the ore-forming age is Early Triassic.Previous studies have shown that magma intrusion and mineralization are closely related to the Beishan area.Beishan Mountains at Triassic belonged to a post-collisional geotecture environment.Under the action of post-collision intracontinental extension，massive granitic magma upwelled along the shear zone and provided thermal power and routes for the activation and migration of ore-forming materials，thus creating favorable conditions for large-scale metal mineral metallogenesis in this region.Qianhongquan gold deposit has similar metallogenic epoch and metallogenic geological background as those complex deposits in the southern part of the Beishan orogenic belt.Based on previous research results，it is believed that the Triassic was a period of large-scale metal deposits in Beishan area，and the post-orogenic extending stage was a favorable geotecture background for the occurrence of abundant metal minerals.These facts will constructively guide gold deposit metallogenic mechanism research and gold prospecting in Beishan Mountains，which must be highly valued by geological workers.

The south of Anhui Province is the important area of production associated gold in our coutry.It has been 110 t reserves of rock gold,240 t associated gold.There is 60％ in Tongling’s area.Yangtze river metallogentic zone is located in Anhui Province,There are 63％ reserves of associated gold in the zone.There are more than 50 associated gold deposits and some rock gold deposits that have been found.We analysis and summary further geological characteristics in this district,and discuss ore prospecting of this area.

The mining industry provides an important material basis for modernization and has become the basic industry for China’s economic construction.In order to promote the high-quality development of mining industry，the construction of green mines is the only way for sustainable development.There are studies on the evaluation of green mine construction，which mainly focus on the content analysis method and case study method，but rarely from the perspective of policy design，while the government is also an important subject to promote green mine construction.In order to improve the adaptability and scientificity of the policies，it is necessary to conduct a systematic evaluation of China’s green mine construction policies.Therefore，this study quantitatively evaluated and assessed the existing green mine construction policies in China，identified the deviations and shortcomings of the existing policies and proposed optimization strategies，which is of great theoretical and practical significance for the development and improvement of green mine policies in the new era.Unlike subjective evaluation methods such as expert scoring，the study analyzed the content of 193 green mine construction policies in China between 2005 and 2021 through social network analysis and text mining，extracted important subject terms，and build a framework for evaluating green mine construction policies on this basis.39 of these policies were selected as samples （13 policies at the central level and 26 policies at the local level）.The Policy Consistency Index Model （PMC），an important modeling method for policy research analysis，was used for quantitative evaluation and comparative analysis.The study found that China’s green mine construction policies are reasonable，but there are still some problems that need to be improved.Among the 39 selected Chinese green mine construction policy texts，8 of them are excellent，31 are acceptable，and there are no perfect and poor policies，while the central government’s policies generally score higher than local governments.At the central and local levels，there are common problems in green mine construction，including the scope of regulation and implementation agencies are small，economic benefits，tourism aspects，long-term planning，talent incentives，laws and regulations need to be improved.At the regional level，there are differences in green mine construction policies，including the lack of effective supervision in the central region，the lack of binding in the northeast region，and the need to improve the policy areas in the eastern and western regions.The research results provide a reference basis for the formulation of green mine related policies in China，and also provide new ideas and methods for the evaluation of green mine construction policies.

Pressure leaching method，which is an effective method of pretreatment in gold ore or concentrate with sulfur and arsenic，has many advantages：shorten the process，improve leaching rate,not produce the sulfur dioxide. The main reactions of sulfide，iron and arsenic compounds in high temperature oxidation include three approaches：the full oxidation of sulfur to be sulfide or sulfate，divalent iron during the reaction to be ferric，arsenic to be arsenate. As the decreasing resources of easy ore processing，pressure leaching method has been used more and more widely in industrial applications while the research of leaching mechanism is relatively less.We reviewed the chemical reactions of arsenic，sulfur and iron in the pressure leaching process.

The characteristic and composition of carbonaceous minerals in gold ores were reviewed. The negative action of carbonaceous minerals and pretreating processes to eliminate their influence in the gold cyanide process, as well as direct extractive technologies were summarized. The review was focused on aqueous chlorination as pretreating process and direct extraction of gold with hypochloric acid solution.

Refractory gold ores are the main resources of the development of golden industry for the future,A lot o f studying and developing work have been carried on for the pretreatment of refractory gold ores and subsequent cyanide gold refining in the recent 10 yeras,in which the oxidation roast,hydrometallurgy and microbio oxidation have been applied to the industry.This paper gives a brief view for the present situation and problems of refractory gold ores cyanide gold refining.

Pyrite is one of the main Au-carriers in the Zhaishang gold deposit.The pyrite in the rock are fine and strawberry-like or coccus-like,globe-like,cube-like pyrite.The pyrite in the rock are thick and big,mineral form as cube,pyritohedron,xenomorphic granular, small veins.Pyrites of mineralization are poor in iron （Fe）=45.98%,sulfur （S）= 51.69%.S has been replaced by As，Sb,Fe has been replaced by Ni、Ag.The mode of occurrence of Au is self-existent in the pyrites.Au-carriers in the those strawberry-like，cube-like pyrite less than in those pyrites mineral form as cube,pyritohedron,xenomorphic granular,small veins.Au,As has the negative correlation characteristic feature in different pyrite.Those pyrites as overgrowth rim,in the first rim,third rim,fives rims are rich of gold, while in the core,second rim,fourth rim,and sixth rim are poor of gold,the relationship between Au and As is positive correlation.

According to the metallogenesis, metallogentic environment and deposit characteristics, the gold deposit in the drainage area of Honghe river(Yunnan section)can be divided into 4 types: eluvial-taulus;diluvial;alluvial2diluvial;alluvial. The metallogenesis in mainly controlled by basement rock,geomorphology, weather fault-river and hydrochemical environment. The most potential area is Yuanyang-Jimping area.

Tanlu fault is a huge fault in eastern China.At present，there are still some key problems concerning the Tanlu fault.One is the length of Tanlu fault.The second is the horizontal slip distance and depth of the Tanlu fault.The third is the formation of Tanlu faults and its activity time.The fourth is whether it is the main controlling factor for the formation of the Jiaodong gold deposit.Based on a large number of geological，geophysical and geochemical results，combining the latest high-precision petroleum seismic exploration in Tanlu fault zone，the restoration of tectonic evolution shows that the rudimentary Tanlu fault occurred in the Mesozoic，mainly in the central orogenic belt of the southern section，and large-scale strike slips occurred in the Cenozoic （45～24 Ma）.The horizontal slip distance of the Tanlu fault is about 760 km.Tanlu fault is mainly a reconstructed fault，not the main control structure of the Jiaodong gold deposit.The primary ore-controlling structure of the Jiaodong gold deposit is a central orogenic belt.The formation and evolution of the Tanlu fault is closely related to the formation of many Mesozoic and Cenozoic pull-apart basins in eastern China.This study will provide a new idea for the study of tectonic dynamic environment and mineralization process in eastern China.

The 460 gold deposit is located in the Mazhongshan area of Subei County,Jiuquan City,Gansu Province，and its geotectonic position is located in the Huangshan-Hongshishan-Lujing Late Paleozoic intracontinental rift zone of the Xingxingxia-Hanshan microplate,Kazakhstan Plate.The gold mineralization in the region is jointly controlled by tectonic,magmatic rocks,stratigraphy and metamorphism.460 gold deposit is a multi-phase medium-low temperature hydrothermal deposit,the origin of hydrothermal and ore-forming materials mainly come from atmospheric precipitation and ore-bearing wall rocks，mineralogenetic epoch is middle and late variscan,with a large number of gold veins and more than 110 large veins.10 representative gold veins were selected on the basis of previous data and indoor comprehensive research.The metallogenic regularity of gold deposits was summarized,and a prediction model of geochemical primary halo was established by field observation,isotopic geochemistry,inclusions test and primary halo rock geochemical survey.The predicted results show that there may be 21 blind orebodies in the depth of 10 gold veins，the drilling proved that the mine was good.

The mineralized geoloical condit ions of gold placer of Liaodong region are discussed, reveal the mineralized law of gold placer and points when one gold placeris formed under the suitable conditions of material sources, climate, hydrodynamics, andforms,neotectonic mov ement and soon, especially, the proper sealing condition is necessary.

New superlarge gold deposit is found in the northern sea of Sanshandao，Shandong Province.The hydrothermal alteration minerals of orebody mainly include muscovite，lepidolite，ilite，spodumene，epidote，kaolinite，hornblende，dolomite，calcite and smectite，as identified by short wave infrared measurement.The muscovite has close relationship with gold mineralization.Gold grade has the positive correlation with peak intensity，contrast of intensity，symmetry of peak in short wave infrared spectrum.Aluminum-poor muscovite have the indicate significance of heat center.Aluminum-poor muscovite distribute in the deep drill.With the increase of depth，there have still stable trend of aluminum-poor muscovite distribution.This shows that the depth of metallogenic heat source is deeper，indicating that the depth of gold deposit has great potential for prospecting.

More extensive low-grade oxidized deposits of gold are dispersed over Longnan mountain regions in Gansu Prov ince.Their characteristics are zonal dist ribution,large scale and low grade.Gold can be ext racted by means of tank leaching,heap leaching and cyaniding,less capital and more quickly effective,realizing returns on an investment in just one year.The profit ratio of the capital is very high.They possess many feasible factors in the development and utilization.

As the best carrier of gold, the existence of pyrite in gold deposits implies some metallogenic information. The crystal form , grain size, micro morphology and S/Fe of pyrite closely relate to gold metallogeny. Especially, the gold content of pyrite can be used as a true mark of gold mineralization. It is of important sign if icance for gold prospection to pay attention to those characters of pyrite.

Based on the dual functions of commodity and currency，this paper takes the great influence of gold price fluctuation on the world economy.At present，most of the literatures analyze the influencing factors of international gold futures price fluctuation from three aspects of supply and demand，finance and index.However，due to the instability of the global political and economic environment，international gold futures prices fluctuate violently.Few scholars consider the impact of geopolitical risks and economic policy uncertainty on the price fluctuations of international gold futures.At the same time，few scholars combine the above two factors with other variables to analyze the influencing factors of international gold futures price.In order to better explore the main influencing factors of international gold futures price，this paper used the monthly price data of international gold futures from 2000 to 2019，using VAR model，VECM model，cointegration test，impulse response and variance decomposition to conduct empirical research.At the same time，Granger causality test was used to analyze the causal relationship between the variables and the international gold futures price.The analysis focuses on the results of impulse response，which is different from the method of orthogonal impulse response in traditional dynamic analysis.In this paper，the generalized impulse response analysis method was used.The results show that there is a long-term equilibrium relationship between international gold futures price and geopolitical risk，economic policy uncertainty，dollar index，interest rate level，U.S. inflation level and the D-value between global gold supply and demand，and dollar index have the most significant impact on international gold futures price.Geopolitical risks and economic policy uncertainties have a positive impact on the international gold futures price in the short term，while the positive impact of economic policy uncertainties is longer.This paper provides a better theoretical basis for predicting the trend of gold price.

Many different types of gold deposits are abundant in Yunnan,the main gold deposit types are as below:the metaclastic rock-type,the sedimentary rock (Carlin-type or fine clastic rock-carbonate rock-siliceous),the alkali porphritic rock-type,the intrusive rock-hosted and endo-and exocontact belt-type;red clay-type and the marine volcamic rock-type.The chiefly ore-forming belts include Mt.Ailao belt,Dali-Lijang2Ninglang belt,and Southeast area of Yunnan,LuxiRuili in the west of Nujiang River.This paper summarizes above-mentioned gold deposit types and ore-forming areas.

to the principle and project that Tu Guangazhi proposed in 1990,the gold ore deposits in QinLing (Shaanxi) may be classified into fouowing types:Archean high-grade gneiss type,fine grained fragmental rock-carbonate rock-silicilith type,metamorphic fragmental rock type,volcanic rock type,explosive breccia type,intrusive rock exo-and endo-contact zone type.In this paper,the geological characteristics,metallogenic geological setting,the source of ore-forming materials,digenic mechanism and metallogenetic epoch of gold ore deposits are also discussed.

We describe the geophysical technologies and methods of china’s resources exploration briefly and consider
that the integrated application of high resolution, high precision,multi-disciplinary and multi-orientation technology will become inevitable trend of geophysical development. According to the application of geophysical methods in prospecting,we divide it into three stages of metallogenic prognosis, prospecting prediction and mass screening evaluation, different tages adopt proper method. Through the experiment study on the Jingerquan copper nickel conbalt polymetallic medium ore deposit in Hami of Xinjiang and Daijiazhuang lead zinc mine in Dangchang of Gansu,we consider that the effect of geophysical exploration methods in polymetallic prospecting prediction and evaluation is obvious.

The Muruntau and the Kumtor gold deposits in the middle Asia Tian-shan.was super-large deposits of thousand ton level.The feature of Muruntau-type gold deposits was which in the carbonaceous clastic rocks.and the ore was quartz stockwork and the stringer vein.The Xinjiang Tian-shan was joined with the miner alization belt which aforementioned deposits in it.In the Xinjiang Tian-shan.the Nanati zone and the southern Tian-shan zone was the most perspective for search for mineds of the Muruntau-type gold deposits.The Saw ayartun deposits in souther Tian-shan was a Muruntau-type gold deoposits.which first finded in China.

Recently，the exploration of cobalt resources in the Jingchong-Beishan area，the east of Changsha-Pingjiang fault zone，northeastern Hunan Province，has made great advances.Some Co （-polymetallic） vein deposits including the medium-size Jingchong Cu-Co polymetallic deposit and Hengdong Co-Cu deposit，and Dayan Au-Co occurrence were discovered in this region.Based on the detailed field observation，this study identified the ore stages，and concluded the metallogenic characteristics of Changsha-Pingjiang cobalt ore belt as well as the ore-forming factors.The combined microscopic observation and in-situ analytical methods revealed that the metal Co was mainly incorporated in fine-grained pyrite and arsenopyrite as stoichiometric substitution，with subordinate occurrence as independent mineral cobaltite.The complicated texture and chemical compositions of Co-beating pyrite and arsenopyrite indicated that pyrite associated with arsenopyrite has the higher Co concentration （up to 13.48%），greater than that in arsenopyrite-exclusive assemblages.Therefore，the mineral assemblage of fine-grained pyrite and arsenopyrite can be used as the mineral fingerprint to trace the high-grade Co ores during the prospecting exploration.Subsequently，the preliminary mineral processing technology was proposed.

Thiobacillus ferrooxidans has an extraordinary impact on economy and society of industry and environment. In this view, we presented research progress on biologic characteristic, isolation, purification and mobilization, genetics and its application in order to make full use of the widely distributed strain.

The slurry electrolysis process is a new technology of hydrometallurgy. Now it is widely studied for treating chalcoprite(CuFeS2),galena(PbS),complex silver concentrate, bismuth ore and multi-metal sulphide etc.. Great progress has been made and three slurry  electrolysis factories have been established sequentially for treating bismuth ore, complex silver concentrate and gold concentrate. The unique advantage of its efficiency and environmental protection make slurry electrolysis process have wide application prospect. In this paper the development and the studying situation of slurry electrolysis process have been reviewed. The advantage, disadvantage anddevelopment history of the slurry electrolysis process have been introduced, and the current situation of slurry electrolysis process’mechanism research, medium research, equipment research, laboratory research and industrial application has been introduced too. And the studying orientation of slurry electrolysis process is also looked ahead.

Based on the discussing of the relationship between geological structure evolution and gold mineralization of metallogenic belt in China -Mongolia border,we research the gold deposit types ，which are controlled by Variscan intrusive rocks,ductile shear zone,Variscan volcanic activity and Permian.We think preliminary that gold prospecting should focus on the Ukraine Abagaqi-Sunitezuoqi-Suniteyouqi area whose mineralization age is mainly late Paleozoic,tectonic is ductile shear zone and inter-layer slippage detach.Variscan intermediate-acid intrusive rocks volcanic and sub-volcanic are closely relationship with gold mineralization.

Because cyanide is poisonous，it can pollute environment by using cyanidation to deal with gold ore.Meanwhile,with the problem of poor effective in the leaching of complex gold,many scholars try to find better method to instead cyanide.The advantages of non-cyanidation gold leaching technology are non-toxic，fast leaching speed and strong adaptability for impurity,it is subjected to favour.We review the research advance and application status of non-cyanide gold leaching technology.The thiourea,thiosulfate,thiocyanate,polysulfide and calcium polysulphides,halogen and its compound and their advantages and disadvantages，are emphatically introduced.We advocate non-toxic and more effective gold leaching technology to attain the goal of efficient，environmental protection purpose and adapt to industrialization production.

Goaf has become a major hidden danger affecting mine safety production.In order to accurately analyze the stability of complex goaf group and strengthen the safety control of goaf group in mine，based on the fine detection data of goaf group in a mine，a coupling modeling and numerical simulation analysis method of Geomagic，Midas GTS and FLAC3D was adopted to analyze the stability of complex goaf group.At the same time，the safety classification evaluation system of complex goaf group was established based on 16 indicators such as goaf type，rock compressive strength and exposed area，and the safety classification evaluation of complex goaf group was carried out.The results show that there are caving hazards in the hanging wall and southeastern roof of large ore body goaf.The ‘springboard’ rockmass in the northwest of the panel-5 will be deformed greatly in the process of residual ore mining.There is great stress concentration in the inter-pillar separated by each goaf in the main mining area.Combined with the safety classification evaluation results of goaf，the treatment measures of each goaf are proposed.The research results provide reference for the stability analysis and safety classification evaluation of mined-out areas in similar mines.

Based on the studies of the geometric style,assemblage and deformation characteristics of the Machaoying fault zone,we revealed that the fault has undergone at least two deformation stages:ductile thrusting and brittle faulting.The brittle fracture,which took place later than the ductile deformation,closely related to the ore genesis,gold molybdenum deposits were directly controlled by the brittle fracture of Machaoying fault.The ore veins were mainly hosted in shear zones and extensional structures.The ore-bearing hydrothermal fluids ascended along the main fault zone and the fault was regional ore-controlling structure.The varieties of secondary faults and rock micro-fractured cracks were both good ore-hosting structure.

(U—Th)／He dating method is a new radiogenic isotope dating method rapidly developed in recent years，which has been applied widely in the research field of basic geology．At first，we simply present the(U—Th)／He dating principle and summarize its technique development and application results in geological research．Furthermore，we discuss the feasibility of(U—Th)／He dating in determining the forming age of nonmetallic—metallic ore deposit，the succeeding alteration and unroofing age of metallic ore deposit