The Kunlun Mountain-Lianghu region was a major production base of gold in Qinghai Province， moreover，the proportion of golden resources in the region was approximately 53% of the Province.Through the study of gold metallogenic characteristics of the area，we believe that metallogenic type belongs to the broken alteration rock type.Combining with geochemical，geophysical and remote sensing comprehensive geological information，extracting the ore-controlling structure，and comprehensive prediction factors，and application of GIS，we narrowed the scope of prospecting in the area through the comprehensive information overlapping circle target area.After choosing Dachang gold deposit area as a model，making similarity comparison with delineated the target area，employing the geological volume method to estimate resource，we attained the result that resources made up about a quarter of predicted resources，which illustrated the gold resource potential was tremendous.
Dongchenggongma gold mine was discovered during an anomaly verification work carried out by Geochemical Exploration Institute，Qinghai Bureau of Geo-Exploration and Mineral Development，but it has been already closed due to some external causes after geological survey.In this paper，we analyze the metallogenic conditions by summarizing geological，geophysical，geochemical and remote sensing characteristics.The result shows that Dongchenggongma gold deposit is a medium sized gold deposit recently found in a Au-Sb mineralization belt located in the North of Bayan Har orogenic belt in Qinghai Province，and the ore-bearing strata is mainly lower Early Triassic Changma River Group，NW-SE trending faults are the main leading ore structure，porphyaceous adamellite of Yanshan stage is closely related to mineralization.The research shows that there has a good ore-forming geological background and prospecting marks，and 18 gold veins have been found in the area， it shows a good prospect for gold deposit.
Zhaishang gold deposit is a large Carlin and Carlin-like type gold deposit in the western part of the Min-Li basin，west Qinling Mountain.The gold deposit hosted in the Guoyingniuchang anticline and the fracture oblique anticline，the ore bearing strata are middle-upper Devonian and Lower Permain.The south ore belt is mainly controlled by faults，and the ore vein of north belt is mainly controlled by the interlayer shear zone.Mineralized bodies developed along the contact interface of sandstone，sandy slate and carbonaceous slate.We found a small amount of quartz diorite porphyrite veins in the mine，and the veins are closely associated with gold mineralization.The ore-forming fluid has the characteristics of low temperature，low salinity，low density.Mineralization is mainly concentrated in the Late Triassic-Early Jurassic（220~170 Ma），Early Cretaceous （130~100 Ma） and Paleogene Period （60 Ma），in the mid late Himalayan period，presumably superposition of the new tectonic hydrothermal mineralization.Zhaishang gold deposit have three metallogenic conditions，first enrichment of shallow and deep metallogenic material，followed by material migration has the power source strong，again is the change of the physical chemical conditions and ore containing sufficient space is an important guarantee for ore formation.Therefore，the formation of Zhaishang gold deposit is the result of multiphase superposition of many ore-forming factors in the relatively limited favorable metallogenic tectonic realm.
Kubusu gold deposit is located in the East Junggar fold belt of Junggar fold systems，and the Late Paleozoic volcano magma ore belt in the southern margin of the Yemaquan crustal block it lies to the Kubusu strong strained tectonic zone which is a large ductile-brittle shear deformation belt.There are strong tectonic activity in the area especially development NWW strike regional fracture，and have strong deformation of squeezing，schistosity and mylonitization.The stratum are mainly the marine volcanic clastic rocks which have higher gold abundance in Kubusu Group of Silurian system.There are frequent magmatic activity in this area that the lithology is mainly super-hypabyssal intrusive rocks of diorite porphyrite，quartz diorite porphyry，felsophyre，etc.The gold deposits are controlled by the tectonic expansion and mylonitize belt，whose formation by process of ductile-brittle shear in the vein rocks，and that constitute the ore rocks.The gold deposit is the crushing alteration type，and the orebody formation has experienced two stages of ore-forming elements enrichment which caused by the intrusion of vein rocks（diotite porphyrite, quartz diorite porphyry） in the two period of time.The mineralization enrichment degree is closely related to the tectonic expansion，development of the deformation and mylonitization.We analyzed the metallogenic law and phase，and the relationship between material composition and interspace massive vein rocks and gold ore-forming by discussing the geological background and metallogenic characteristics.The comprehensive prospecting model of the deposit was built in order to provide helpful for deep prospecting.
Baimashan small rock，related to the gold deposit in spacial，is located in the Baimashan gold deposit area，the South Qinling ore-forming sub-belt.It is dominanted by the granodiorite and minor biotite monzonite at the marginal part.Geochemical characters indicate that Baimashan quartz diorite belong to the high K calc-alkalic series，however，they also have more similar geochemical characters to the“C” type adakite than the“O” type adakite.The tectonic nature of lithosphere in South Qinling was characterized by transition from compression to extention in the Early-Middle Triassic period.The granites of adakite in the South Qinling area may resulted from partial melting of the mafic lower crust（basalts） in the thickened lower crust，and mixing with the mafic magma，due to the lithospheric stretching and the asthenosphere upwelling，which can provide some clues to the collision between the North China Plate and the Qinling micro-plate，and also direct copper-gold prospecting.
Huashigou copper mine is located about 120 km east of Akesai County，tectonically in the South Qilian area.The strata in the area are mainly distributed by Paleoproterozoic Dakendaban Group，Devonian-Carboniferous Amunike Formation and Carboniferous Keluke Formation.The marble，the main lithology of Carboniferous Keluke Formation，is considered to be carbonatite by former geologist as its closer relationship with quartz diorite of Huashigou copper mine.According to the determination and analysis of C，O isotopes，the result of δ13CPDB and δ18OSMOW values（-9.3‰～0‰ and 14.44‰～31.76‰ respectivly） shows that the marble belongs to carbonate rocks originate from sedimentation，and lower δ13CPDB and δ18OSMOW values is probably related to the magmatic hydrothermal of intruding of quartz diorite.
Jinlongshan gold ore belt，which is located in Southern Qinling，can be divided into four equi-distance mineralization segement of Jinlongshan，Yaojian，Qiuling and Guloushan from east to west.The orebodies of the gold belt are hosted in the Upper Devonian Nanyangshan Formation and the Lower Carboniferous Yuanjiagou Formation.Compared to the calcium muddy siltstone，silty shale，calcareous shale and other favorable lithology，the formations are just ore cluster place，but the lithology play an important role in ore-controlling.Furthermore， the structure is well developed in this area.The regional faults control the distribution of the entire ore belt，and the secondary faults strike in NE and EW control the distribution of the ore segment and the position of gold ore vein. Thus，the faults and favorable lithology together control the mineralization of Jinlongshan gold ore belt.
A well developed gold mineralization is discovered in granodiorite and diorite in Dashuigou area，Golmud，Qinghai Province.The gold orebody，which has a good prospecting potential，occurs in NW-NWW fractured alteration zone and is strictly controlled by the zone.The method of exploration in this area：do research on the abnormal form of Au，the stream sediment of 1∶5 000→ find fractured alteration zones in Au anomalies→ layout the geochemical profile of 1∶2 000 of cataclastic rock to study its ore-bearing potential→depoly the costeaning engineering to conduct the surface revealed→arrange the drilling engineering to control the deep. This mineral occurrence is another one of areas where gold orebody is discovered in the neutral-acidic rock mass after Wulonggou and Asiha deposits in East Kunlun.Development areas of neutral-acidic rock mass in East Kunlun combined well developed Au anomalies and fractured alteration zones all possess good prospecting potential of gold ore due to the lack of attention that former mineral exploration paid to this metallogenic type.Therefore，this kind of mineral exploration work shall be attached great importance in the future.
We applied the method of literature metrology，combining with the CNKI database during 1998—2013，and related research literature regarding the gold exploration，exploitation，mineral smelting and management were quantitative analyzed.From the dispatch number，research institutions，research hotspots and cooperation network，we compared the development of gold related research situation between Shandong Gold Group and China.The results indicated that gold technology development of the Shandong Gold Group was tight with the development of China’s gold research situation changes，moreover，its influence in the scientific research and output in the field of gold both increased year by year，which reflected that the Group’s emphasis on gold related research degree enhances unceasingly.Additionally，from the point of collaboration network，Shandong Gold Group focused on the technology bottleneck of joint research in the link of gold production and safety science.
Owing to the existing management modes appear some problems in dispersed custody，various data formats and the difficulty in data searching and sharing，a comprehensive geological information service system for Gold Headquarters of CAPF is established.Based on the analysis of the data management situation，hardware and software environment，and the professional demand，using a series of techniques such as network，GIS，integrated database，MapGIS K9 datacenter and so on，we build the integrated database，design the general architecture and function modules of the geological information service system.The system possesses many functions for the information from mine area，geological data and programs，such as information management and maintenance，integrated information query，online browsing，etc.The application shows that the system runs steadily，manages geological data efficiently，greatly fulfill the demands of geological information for the geological production，program management，analysis and decision works.
To solve the problem of the difficulty using numerical analysis method to obtain the optimal stope structure parameters of the weight，we propose a technique for order preference by similarity to ideal solution（TOPSIS） based on combination of empowerment comprehensive evaluation method.Considering influence of stope structure parameters of the three categories of factors，such as economy，technology and safety.We establish the evaluation system of a stope structure parameters by the principle of analytic hierarchy process，determine combination and weights of each indicator using the entropy weight method and analytic hierarchy process （AHP），and calculate the superior degrees of schemes based on the comprehensive evaluation index，finally，realizing，optimization of stope structure parameters.Taking the example of a mine in Hunan Province，nine schemes，fitting an orthogonal model，were tested，five of the nine schemes were assessed by empowerment combination TOPSIS evaluation model.The synthetic superior degrees of schemes are 40.8%，70.2%，26.8%，52.9% and 4.7% for the second，third，fifth，sixth and eighth ones，respectively，and the third scheme becomes the best.
The low-grade associated gold in copper ore is often overlooked to recover，due to its difficult to enrich to valuation grade.According to the low gold high-sulfur copper ore，which contains 1.84% of Cu，11.09% of S，and 0.12×10-6 of Au，P10 is taken as collector for copper and gold，sulfuric acid as activator and butylxanthate as collector for sulfur.A closed-circuit flotation test was conducted at a low alkalinity，which a copper concentrate are produced with content of 20.98% Cu with a recovery of 86.23% and 1.2×10-6 Au with a recovery of 74.80%， and sulfur concentrate of 48.9% S with a recovery of 74.47%.Therefore，a comprehensive and efficient recovery of copper，sulfur and gold can be realized.Low alkali separation technology of copper-sulfur，which greatly reduced the amount of activator，is conducive to comprehensive recovery of sulfur and lower processing costs.
Foundation monitoring was necessary methods to ensure the implementation of foundation engineering safety in mines.Because the different models for the settlement of foundation monitoring exists certain difference，therefore，how to select an effective portfolio model that can predict the settlement of foundation pit accurately at a certain time in the future was the main problems.In this research，the time series prediction model and grey model（gray sequence combination forecast model） were employed to a deep foundation pit（5.7~13.7 m deep foundation pit） subsidence monitoring data analysis，and the predicted results were accurate and reliable. Meanwhile，compared with the predicted results of single model（such as ARIMA and GM （1，1）），prediction accuracy of the gray timing sequence model was much higher.The predicted results that we obtained were the closest to the measured values，which presented it was a extremely effective prediction method for foundation pit.
The YDX-3L type core drill with hydraulic power head type developed by the Tianhebang exploration technology Co.，Ltd.， in Beijing and ministry of land and resources exploration technology research institute，was suitable for diamond rope core and various other effective drilling process methods.Taking the borehole ZK0005 of the Baoxinggou orefield as an example，we introduced performance parameters of the YDX-3L drill，and focused on analyzing the drill in deep hole drilling process drilling pressure，rotating speed and reasonable selection of pump according to the geological conditions of mining area and the drilling design requirements.Additionally，some deficiencies during the process of drilling rig construction work were given，and we put forward some improvement suggestions and solutions so as to exert its maximum benefits in different mining applications.
The determination of gold in gold mud by activated carbon absorption and iodimetry method was carried out.The gold mud was dissolved by aqua regia and ashed after activated carbon absorption，and then the gold was measured by Na2S2O3 titration.The optimum analytical conditions were ascertained.In this paper，the main analytical conditions such as the addition of activated carbon，speed of filtration，addition of KI，temperature and uniformity of samples were discussed on the effect of gold analysis.Gold mud was used for addition recovery tests by the method，the recoveries for gold were in the range of 97%~108%.The relative standard deviation of the sample determination results（RSD，n=6）were less than 0.50%.The analysis results in cyanidation gold mud between 10% and 30% were consistent with fire assay weight method.The method is suitable for gold in gold mud in range of 10%~30%，and has the advantage of quick，accurate，low cost and low pollution.
The study is concern on selective electrowinning of gold from ammonia cyanide leached pulp of refractory copper-bearing gold ore.The optimum process parameters have been achieved：pulp density 20.0%，current density 15 A/m2，lead alloys electrodes as anodes，stainless steel electrodes as cathodes and duration time of 3 hours.The gold can be selectively electrodeposited from ammonia cyanide leached pulp with good morphology and considerable adhesion.By using the prospective process of selective electrinning of gold，the electrowined pulp can be discharged to the tailing dam and the procedures of CCD，carbon absorbing，stripping and electrowinning of gold-bearing carbon can be get rid of，which will reduce much production cost and investment cost.The study will be an important technical basis for the development of refractory copper-bearing gold ore.
Traditional gold extraction is an intermittent process，that has such problems as long operation time，large organic phase-loss and so on.As a new type of high efficient extraction equipment，the centrifugal extractor has the advantages of high efficiency，continuous operation and high operating elasticity，so it is widely used in liquid-liquid extraction.The application of centrifugal extractor in gold extraction was studied.The results show that the max rotation speed is 3 000 r/min under the premise that DBC is not emulsify.With rotation speed increasing，the extractability increases obviously first and then the increase rate slows down gradually，but the decrease of the phase ratio delays this tendency.With the decreasing of phase ratio，the extractability decreases gradually，the decrease rate becomes more significant，and this tendency is also enhanced by the increasing of rotation speed.With the increasing of extraction stages，the extractability increases rapidly，but the growing rate decreases，and finally reaches a steady state.Four stages of counter-current extraction was carried out in centrifugal extractor.Under the conditions of 2 000 r/min rotation speed，O/A=1∶3，the extractability could be arrived at 98%.
The company produced platinum and palladium low grade gold material that was a kind of steamed residue，additionally，the steamed residue was produced during the process of precious metals concentrate distillation separation of osmium，ruthenium and aqueous chlorination.The existing steamed residue treatment technique of chloride repeatedly，because the effect of the efficiency of chloride，there were still some precious metal residues in the outside pay residue，has the problem of precious metals lossing.In order to improve the precious metal recovery，the smelting plant in the company completed a series of experimental studies on purification of precious metals from the steamed residue.Thus，after the experimental exploration for a long time，the steamed residue chloridizing roasting-hydrochloric acid leaching gold platinum palladium-organic solvent extraction separation process was determined.Then，the industrialized expanding test and the optimum technology conditions were also determined，meanwhile，the direct recovery rate was more than or equal to 95% during the technological process of gold，platinum and palladium.Compared with aqueous chlorination process，the method applied in the paper had advantages of high recovery efficiency for precious metals，low labor intensity，short production cycle and low production cost.
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