Using the basic geological survey and geochemical method，conducts research of the ore belt structural，mine area structural，ore-veins，ore-body characteristics and ore mineral characteristic，the metallogenic regularity of Jinlongshan metallogenic belt’s ore-veins is NE or NW trending fault breccia mineralized bodies and EW-trending interlaminar shear zone mineralized bodies intersection.The extension of the main ore-veins which distribute to the north east is greater than the extended regularity.And Ore-controlling fracture is based on the main fault based，secondary faults supplement.The NE to main structural metallogenetic model had been set up，and which shows that: Sinistral strike-slip tectonic belt is loss flower structural in the section.Gold veins and its upper mercury-antimony veins developed in the faults and formed the fault breccia mineralized bodies，and also developed in the shear zones beside the faults and formed the interlaminar shear zone mineralized bodies.There are four strain centers in Xitonggou-Jinlongshan metallogenic belt.But only the strain center of Dongping-Lianghe has not fond any deposits.It is the vision area of the next prospecting work.At the same time，there also is a strong deformation zones and weakly deformed domain in Zhenan-Longwanggou and Xitonggou-Tiechang tectonic deformation zones which also are the key mineralization area，and can be used as mineralization prospects.
The Huachanggou gold deposit is located in the south of the Qinling Mountain fold system，4 km north of Kangxian-Lueyang-Mianxian deep fault.The gold mineralization zone is controlled strictly by strata，lithology and ductile shear zone.Altered spilite and the transition parts between limestone and silty phyllite are the main ore-controlling strata.Compression shear fracture is the main ore-controlling structure.The gold orebody is occurred as veins and lenticle.Altered spilite and altered carbonatite are the main mineralized types.Pyrite is the main gold-carrying mineral.Occurrence of natural gold in the ore is observed included-gold and fissure-filled gold，the secondary type is intergranular gold.Wall-rock alternation are mainly pyrite，silicification，carbonatization，albitization，sericitization，etc.By studying the pyroelectric coefficient and primary halo of pyrite studies，the result shows that the gold ore body is extending to the deep part.It is advisable to strengthen the work of geological prospecting and ore exploitation between spilite ore belt and sandstone ore belt.
The work area is located in the Li（county）-Min（county）metallogenic belt where the layer system developed completely，the Lithology combination mostly interblended sandstone and slate which in favor of the migration and preservation of gold mineralization，additionally，folds and faults controlled the spatial orientation and distribution of ore deposits.There is a close relationship between activities granite and Au metallogenic，as well as dikes and veins in the areas.At the same time，the gold mineralization and hydrothermal activities also have a close relationship.The various types of hydrothermal alteration is very well developed，and the hydrothermal alteration which closely related to the Au variable is mainly alkali metasomatism，pyritization，silicification，carbonation，limonitization etc.Anglicizing the stratum，structure，magmatic and metamorphic conditions and combined with the research results of the mineral deposit，the geochemical and the remote sensing in the region，3 mineralization targets （Taerli，Biekungou，and Beimengou）were predicted.
It is a typical structural alteration type gold deposit for Shanggong gold deposit.The area has experienced a number of tectonic movement，the fault is very developed which concluded three groups and mainly about NE，SN and nearly EW.Along the Xiong’ershan mantle branch shaft portion fracture, deep ore-forming fluids upwelling and moves to the Jindonggou fault which located at the south of mantle branch detachment zone.And then the oxidation-reduction environment caused the ore-forming elements precipitated，collected and mineralized in tectonic expansion zone.Using the Mantle Branch Theory as a guide，and by analyzing the structural controlled features，pointed out that Multi-stage evolution of mantle plume connect the deep channel，and provides adequate provenance for the formation of Shanggong gold deposit in the area.At the same time，it is a good place for gathering ore fluid in intersection of the deep fault and the detachment zone，which is the key position for prospecting.
Chadong silver-gold field occurs at the intersection of the northernmost of Wuchuang-Sihui NE trending main fault zone and the Guizi-Tashi WE trending arcuate fault zone，of which the fault and the secondary fault controls the gold distribution.Chadong silver-gold field is the very profitable tectonic metallogentic field with the advantageous conditions whose structural is relatively well developed.The survey resumed the relationship between the geologic features，remote sensing geological interpretation and the mineral vein which mainly combined the geological exploration results of Chadong silver gold field.Resulted from the analysis of the ore-controlling factors and the summary of the metallogenic regularity and the main ore-controlling factors，the result had been gotten that: There is a close relationship between the faulted structure and the vein.The faulted structure is the main factor of which controls the size of ore bodies，the occurrence and the morphology.Besides it also creates a good space for the activity of the ore solution and filling.And the 36 vein is possibly to extending to the southwest，which is worth recourse strengthening of the surface to the south.Investigation of the NE-NNE veins should been strengthened to finding new veins as the close relationship between the faulted structure and the vein.This area is expected to find large silver gold polymetallic deposit.By analyzing the ore potential，puts forward suggestions on the nest step prospecting direction.
The Carlin-type gold deposits in sedimentary rock and shallow-metamorphic sedimentary rock are medium-low temperature hydrothermal type which is also one of the important type of gold deposit in Youjiang area of Guangxi Province.The occurrence horizon of Youjiang fold system of gold ore body is mainly carbonate rocks，terrigenous clastic rocks from the Devonian System and Triassic.The structure complicated and diversed and superimposed plays an important role in gold mineralization of the Carlin-type gold deposits.The study suggests that quite high Sb，As and Hg background value is presented in Youjiang area.Overlaping sections of the anomalous elements are not only the important prospecting target areas but also an important indicator of the Carlin-type gold deposits.Through the analysis of metallogenic conditions in Youjiang area the paper points out that the benefit places of occurrence horizon of the Carlin-type gold deposits are intersection parts constituted the platform margin fracture and calcium complex sandstone layer covered in the carbonate platform margin of solitary and soil layer.The beside of deep fracture and big lithofacies interface is the most forceful prospecting direction.At present，4 prospective metallogenic areas were framed out within the mining area.
Paoli gold deposit occurs in the fault altered fracture zone， the ore formation is limestone at the top of Heshan Group and silty mudstone at the bottom of Luolou Group，it is obvious layer controlling.The deposit is formed by three known orebodies，Ⅰ，Ⅱ and Ⅲ，the shape of orebody is bedded and lenticular，north-sorth trending.The gold bearing-rock is calcium terrigenous clastic rocks.The wall-rock alteration develop，the alteration is mainly quzatz，pyrite，arsenopyrite，limonite，clay and carbonate lithification，from inside to outside，which shows zonation.Through the study on ore deposit in the area of geological，geochemical and geophysical characteristics，in particular by high precision magnetic survey，central gradient array method and symmetric four-pole sounding method etc，the deposit has obvious geological，geophysical and geochemical prospecting criteria.Display Ⅱ and Ⅲ abnormal obviously between the orebody，presumably，here the presence of a new orebodies or two ore body is linked together，the late drilling verification obvious gold anomalies.
In order to make a clear survey about the gold deposit reserves and its utilization status in Guangxi，it was established for an information platform and fundamental date about the impeccable reserve management，mine development and environmental treatment，which could guarantee gold resource continuous and stable supplying.Through launching the survey of utilization status for gold resource，it is gained a statistical analysis results about the basic data of quantity，type，construction and spatial distribution for gold deposits in Guangxi.The results show that it is mainly of small gold deposit whose total quantity not large，more dispersed distribution，lower grade，medium-low level of exploration in Guangxi.The utilization ratio of gold deposit is a little higher than others，especially oxide ore whose resources reduced continuously.And the deposit only can meet the low guarantee rate needs of mine gold production since 2025.Finally，the specific recommendations have been proposed at the gold exploration and development and the ways of improving the level of resource utilization in Guangxi.
With the increase in investment in the mining areas，the research about methods of solid mineral geological examination of investment projects need to be strengthened and made it standardized.Combinating with years of experience in the solid mineral geological examination，this paper set out a topic that solid mineral examination of investment projects is a special solid mineral exploration，involves its all stages.This paper discusses the objects， tasks， stages and methods of solid mineral examination of investment projects， and put forward the problems that should be given attention in this special mineral exploration.This paper try hard to establish a set of effective specifications for solid mineral examination of investment projects.
Based on the engineering background of Shi rengou iron mine， according to the practical condition，using multi-stage fuzzy synthetic judgement theory，this paper makes a two-stage fuzzy synthetic judgement model of the stability of mine gob area with 15 factors.The fuzzy evaluation matrix is made using expert evaluation method and three-phase linear membership function method to evaluate the qualitative and quantitative factors.The weight of factors are determined using AHP，then a weight matrix is made.The concourse are then calculated together with the evaluating matrix to complete the synthetic evaluation of gob area stability variable.The results show that the evaluation results can accurately reflect the stability of mine gob area.This is a effective method to analyze the stability of mine gob area.
Wangershan Cent mineral of Jiaojia Gold Mine in eastern Laizhou Jincheng territory in Shandong Province has been constructed over 30 years.Due to the historical gob and the privately owned gob，as well as the recent increasing production at the shallow area，resulting in the surface subsidence accelerated and appeared at many mountain regions.In order to reflect the Wangershan mine shallow collapse areas and surrounding surface changes of office and residents area，7 observation lines and over 70 measuring points have been emplaced using the Dini03 digital level and line measurement method，then，conducted continuous the rock movement observation and access to the region more comprehensive surface movement data.In recent years，the gob governance，the geophysical and the drilling work，were carried out by the ways of combining leveling and drilling in gob surface，and proved the spatial distribution of a more shallow level of -60 m gob.And the surface subsidence monitoring data and geophysical shallow underground gob results were analyzed to know that both the North-South Line of 3 walkway along roadsides and the larger subsidence value of points 6，15，16，17 are located just above the mined-out area，indicating that geophysical results are credible.
In order to optimize the mining process，the Second-step transfer layer optimization adjusted the construction order which construct the way of stope contact and transfer layer stoping at the same time.By turning the original transfer layer stope into upward layer stope，blasting space for transfer layer stoping was made.This can resolve the issues of production can not continue，long recoveries time and low efficiency of the original process in Sanshandao gold mine after transfer layer.The optimization proposal speeds up the cycle，increases the production capacity and operating efficiency of the mine field of apheresis，reduces the production cost and achieve good economic benefits.
It is one of the generally and preferable methods to analysis As，Sb，Bi for the fluorescence spectrometry of hydride generation atomic.But，in process of measuring the As，Sb，Bi used atom fluorescence spectrometry，there are many factors affected the results.Through a series of experimental studies，and comprehensive analysis the various factors that may raised which concluded the samples preparation（such as sample weight，samples decomposition，media test solution，acidity choosing，effects of coexisting ions and eliminate the impact of the reagent blank），the contamination of high levels samples and instrument conditions （such as negative pressure，the carrier gas，shielding gas flow，observation height and the concentration of the reducing agent） on measuring the As，Sb，Bi used the fluorescence spectrometry of hydride generation atomic，the corresponding solution was proposed，and the more reasonable analysis conditions also was obtained.It provides a reliable guarantee for measuring the As，Sb，Bi of the geochemical samples.
Due to a series of flotation，the particle size of cyanide tailings is relatively small，the cyanide tailings slurry become harder to settle，there are more fine particle in the back water，which will reduce the flotation index and the rate of backwater.To solve this problem，we focus on two aspects in this paper：（1）determining the optimal dosage and suitable pH value range in turbidity removal of common inorganic and organic flocculants by the sedimentation experiment of cyanide tailings；（2）determining the optimal dosage of inorganic-organic composite flocculants through the flocculating activity in cyanide tailings treatment.
For normal mineral separating method on the refractory oxidized gold ore which contained As and C in Guangxi Province，the recovery rate was low by only 83.00%，the gold concentrate cyaniding recovery rate was only 50.3%，and the ore comprehensive recovery rate was only 41.5%.In order to improve the recovery rate of the mineral ore，comprehensive study by using all-sliming cyanidation，roasting oxidation pretreatment，bacterial oxidation pretreatment，pressure oxidation pretreatment and conventional flotation concentrate of cyanide and other processing methods were conducted.The bacterial oxidation pretreatment process has been determined finally，and ultimately the selection process bacterial pre oxidation of the refractory ore.The metallurgical recovery rate can increase to 95.00%.
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