Maheiga gold mine is a concealed BIF gold deposit，which is produced in the contact zone of upper and lower sections of the Nyanzian group in Archaean Kahama greenstone belt of the Tanzania Craton，and controlled by interlaminar shear zone.Folds in the region are developed，and the magmatic activities were strong.Silicification，chlorite，pyritized and limonitization have close relationship with gold ore.The deposit can be divided into three periods and five mineralization stages.The main mineralization stage is natural gold-quartz-polymetallic sulphides stage.Mineral enriched in magnetite quartzite and gold ore，the magnetic susceptibility of which （up to 342×10-3~1 477×10-3 SI） has a significant difference with the background rocks（only 0.16×10-3~1.26×10-3 SI），the background rocks are tuffaceous sandstone，metamorphic tuff，chlorite phyllite.Apparent chargeability of banded iron formation，gold ore iron formation and tuffaceous sandstone are 8.66×10-2，2.18×10-2and 0.48×10-2；apparent resistivity of them are 220，280 and 380 Ω·m.The former has obvious physical characteristics of relatively“low resistance and high polarization”.The main geochemical anomaly element combination is Au，As，Sb，Ag，Hg and Ba.The order of concentration Clark of elements in ore is Au-As-Sb-W-Pb-B-Ag-Zn-Sn-Mo-Bi-Cu-Cr-Hg.Au，As，Sb in the banded magnetite-quartzite enriched obviously，this is consistent with the characteristics that the favorable metallogenic layers banded magnetite quartzite.They are indicator elements for seeking deep gold blind orebodies.We brought forward the exploration criteria of BIF-type gold deposits， according to above characteristics of BIF.
Through the field investigation and indoor rock mineral research in South Qinling，Jinlongshan primary ore types is divided into four categories by the structure of the metal mineral occurrence state：disseminated gold ore，lamellar gold ore，veinlet gold ore，structural breccia type gold ore.The disseminated gold ore and lamellar gold ore occurrence in the compressive shear deformation interlayer shear zone，which is nearly EW to distribution and being squeezed from S，N and W，and established the interlayer shear zone type ore is the main ore type.Interlayer shear zone type ore is the main ore type，and tectonic breccias’ type ore is secondary.The formation of interlayer shear zone type mineralization body is the result of the ore-forming fluid permeating stratum and the between layers，while the fracture structural breccia type body is formed by the ore-forming fluid spreading along the fault belt.The mineralized bodies of Jinlongshan gold deposit is formed by the interlayer shear zone type mineralization and the tectonic breccia type mineralization.In this paper，we study the ore types and mineralization types，analyze the mineralization mechanism，and correct the mistakes of the past ore body connection.It will provide a basis for future orebody connections，also has guiding significance for gold deposit exploration in Jinlongshan gold deposit.
Huashugou gold deposit is located in the southern margin in the middle of north Inner Mongolia axis，Northern China Carton. Its folded metamorphic basement is composed of the Archean Jining rock groups，which is controlled by NW，NE fault fracture zone.Six gold mineralization points are found within nearly 15 km2 of the mining area，such as Mujianggou, Huashugou and other gold points，the main part of which is the structural altered rock type with others Quartz vein rocks type.Based on introducing the ore-forming geological background and characteristics of geophysical and geochemical anomalies，we mainly analysis mineralization characteristics and prospecting factors of Huashugou gold metallogenic，and discuss the gold metallogenic geological conditions and mineral deposit genesis from aspects of tectonic and volcanic activity.Finally it point out that the structure closed to NW，NE is the most important prospecting area，especially paying attention to the quartz vein and quartz porphyry vein along with the instrusion of the faulting activities.In this way，it points the key area of prospecting.
The Bayanwenduoer gold deposit was located in the volcanic passive margin between north China plate and Siberia plate and on the collision belt for them.The deposit was controlled by the Bayanwenduoer-barunsarah ductile shear zone，and the tectonic deformation was mainly in Indosinian.The mylonite series were well developed.And the whole pattern of ductile shear zone is stagger appearance of strong and weak strain.It had obvious typical macro and micro structural characteristics in the zone，and also has ductile shear deformation characteristic which is form left lateral to right lateral.The formation temperature of the ductile is about 220 ℃，the formation pressure is about 270 Mpa，and the formation depth is 11 km under the ground.It is given priority to with low temperature alteration about silicification，pyritization，sericitization，chloritization，petrochemical，galena，sphalerite，clay，etc，and belongs to the shear deformation at low temperature.Based on the geological background，geological characteristics of the deposit，ductile shear zone in the macroscopic and microscopic characteristics and evolution analysis，we discussed the mechanism for the formation of gold deposit，and provided a strong guidance for future geological survey research and metallogenic prediction.
In Zhaishang gold deposit，the standard of geological exploration is in the reconnaissance survey stage，with less work, according to the requirements of “standard of rock gold mine geological exploration”，it should be tried to use the computer information processing technology and advocate using a variety of methods to estimate resources in exploration work.Based on the above mentioned，on the preparation of the survey geological report for the northern Zhaishang gold deposit，use SD and Micromine kantan3D software system to review the estimating the resource by geological block，and calculate the resource of 12 veins.This paper mainly through the following five aspects to discuss：①Using the software validation function，found data errors and reviewing basic data；②Through the establishment of 3D model check the rationality of orebody connection；③Using closed polyhedral estimation method of Micromine kantan3D software system audit orebody volume；④Using Inverse distance method of the Micromine Kantan3D to evaluate both the quality of the ore and the to tala mount of metal；⑤using the SD system to examine the amount of metal and ore.In conclusion，comprehensively using a variety of methods to calculate the quantity of resource in the geological exploration work，it ensures that the resource of the calculation results is true and correct.Additionally，what is also presented in this article is discussion on choosing effective method in resource calculation and choosing efficient way in implementing collaborative work between human and computer.
The Baimashan gold deposit is located in the south ore-forming sub-belt of the southern Qinling Moutains area.Moutains The Ore body is en echelon distribution taking on NE，and compoundly controlled by the stratum （limestone，slate） and NE to the second-order faults，which is the main ore-controlling factors（structure）.Ore bodies occur in contact regions of the limestone and marble and the slate.Hydrothermal alterations are mainly pyrite，marbleization and chloritization.Gold is given priority to with microscopic gold，accidentally see natural gold.By comparing the features of Baimashan gold deposit with the carlin-type gold deposit of Daqiao，Luerba and Shuiyindong，found that these deposits have a certain similarity in Au-Ag-As-Sb elements combination，ore mineral composition and altered mineral combination，and showed the deposit with the epithermal ore forming characteristics.Therefore，Baimashan gold deposits is more close to the carlin-type gold deposit，and has a big difference for the orogenic gold doposit and the magmatic-hydrothermal gold deposits.Combined with the geological background in southern Qinling and the latest research progress of carlin-type gold deposit，speculated that Baimashan gold deposits may be a fault-carlin type gold deposit，recommended that the further work should be mainly revolves the NE to the second-order faults.
Division of rock engineering geological petrofabric，engineering-geology characters and stability of roof and floor rocks are analyzed in order to solve the problem which would be met in discussing the engineering-geology character of Yangshan mining area and mining.The result，combining the rock physical and mechanical properties test research，shows that petrofabric in this area can be assorted into four kinds，soft and weak ones，soft ones，hard ones and adamantine ones.The orebody can be affected by the structural belt in its formation，so the rock is fragmentary，the stability of orebody is poor，and engineering geological incident might be often.And the result shows that mining conditions in this area is complex.Problems that might exist during mining process and the solutions are put forward by analyzing the mining area in different conditions.
The geotectonic position of Jinmuda-Nanmuda gold deposit belt belongs to Songpan-Ganzi geosynclines fold system.In recent years，many gold deposits which are Jinmuda gold deposit，Nanmuda gold deposit and Dailong gold deposit have been found in the belt.Through summarizing and analysis the geological characteristics and metallogenic factors of typical gold deposits，we found that the gold mineralization enriched in the Triassic xinduqiao group，which provided a primary source for the formation of the ore belt layer.In addition，magmatic rocks and faults in this area also is important control factors of gold mineralization.Since Triassic，characteristics of the tectonic evolution，the hydrothermal solution and the mineral migration reflects the gold deposit genesis in the belt belongs to hydrothermal-tectonic altered rock type.
Sanshandao-Xinli-Cangshang gold deposit is the important part of Zhaoye gold deposit.Its surface and shallow resources would dry up constantly，as more than 10 years of mining.It is particularly important to carry out the deep and periphery prospecting work using advanced technology in mining.This study adopted a new method of structural superimposed halos to predict the blind ore-body，established the structural superimposed halo model，and emphatically analysis the characteristics of structural superimposed halo’s key elements in the different middle ore deposit.Results of blind ore prediction show that 28 target areas have been preliminarily put forward in Sanshandao gold deposit, and the depth of main orebody predicts metal quantity of 35 234 kg；14 target areas have been preliminarily put forward in Xinli-Cangshang gold deposit，and the depth of main orebody predicts metal quantity of 52 189 kg，better prospecting effect was obtained.
The Nangetan mine located in the southeast of Qaidam Basin in Dulan County，Qinghai Province，is a skarn type iron-based multi-metal deposits related to diorite porphyry.The mineral deposit can be divided into two ore belt areas，north area and south area，by diorite porphyrite dikes.Ore bodies occur in the fracture altered zone，and the outputs of diorite porphyrite veins，skarnization belt，orebody and fault are consistent.Through the measuring and the statistics of the magnetic and electrical parameters of the different rocks and ores，what was known is there is the strongest magnetic，highest polarization rate and the lowest resistivity for the ore bodies，while lower magnetic and polarization rate and higher resistivity for surrounding rock.The differences between the ore bodies and surrounding rock are obviously，and it is the physical foundation for the works of magnetic method and electrical method in this area.In recent years，the author carried out the works of 1∶10 000 magnetic method and IP method in mine sweeping surface，and delineated three magnetic anomaly areas and one IP anomaly area.By setting up three SIP spectral IP sounding profile in the areas where overlapped by the magnetic and the electric anomaly.Then，three SIP polarizability anomalies areas，with abnormal trend of northeast and the tendency of nearly erect，were delineated.The drilling results show that the anomaly of SIP polarization caused by the ore body (mineralization)，and the anomaly of the ore’s （mineralized bodies） SIP resistivity showed different anomaly in resistance.High resistivity anomalies may be caused by the rejection of the current in the fractured ore，so the performance of resistivity anomaly is not necessarily low resistance.Based on the prospecting effect of geophysical prospecting in Nangetan mine， the model for searching the polymetallic deposit dominated by iron in Nangetan and the surrounding areas was proposed：using magnetic method and IP intermediate gradient for 1∶10 000 scanning to delineat the anomaly of the magnetic and the IP，then setting up SIP spectral IP sounding profile in the land surface areas where overlapped by the magnetic and the electric anomaly，measuring profile plumb with the magnetic anomaly and the IP anomaly areas.Finally，delineating polarization anomaly of the SIP section，and revealed the project.
Nacheng silver-gold polymetallic ore mine found in Yunkai area，Guangdong，is a medium scale mine.It is located in the core of Yunkai uplift and the centre of Wuchuan-Sihui fault，in the western section of South China fold system.It has good ore-forming geological conditions around the mining area，along with faults developing and strong magma action.A lot of veins with characteristic of ore output in groups，which is mainly controlled by the lower-level tensorshear faulting，as a result，its space arrangement showing the pattern of intensively left addressed.In recent years，through the large research work，outlining 10 mine areas for the gold-silver polymetallic ore，all of which present an increase trend of silver gold polymetallic ore enrichment，showing a good prospect for finding mineral resources.Through the study of ore deposition，quality，texture and structure，chemical composition and metallogenic stages of mineral formation sequence，we discussed the deposit genesis，summarized the prospecting marks，and provided detailed geological data for further prospecting and mining scale expanding in deep and edge.
In 2010，examining the 1∶20 million brake Qin B anomaly in Zhiduo County，Galonggema peripheral check Chung area，carried out the 1∶5 000 stream sediment survey 200 km2 and delineated the HS1，HS2 and HS33 composite anomalies，which were mineralization anomalies after verification.In the composite anomaly area，1∶10 000 soil investigation have been carried out and 18 composite anomalies were found.The result shows that the anomalies mainly are the element combination of Ag，Cu，Pb，Zn and Mo.And it has the characteristics of good identity，high value，and sharp contrast etc.In HS2，further to the AP4，AP10 and AP16 soil anomaly inspection，found that 4 Pb-Zn orebodies，3 copper orebodies and several clues to copper mineralization.The results show that the geochemical anomaly has good prospecting indication significance.According to the work degree，speculate that the mineralization types mainly are the massive sulfide deposit，the skarn type deposit and the hydrothermal type deposit.
There are problems exsiting in a drilling process of hydraulic rock drill，for example，the front end cover becomes loose，rotary pressure can not be tested，impact piston strains and the drill does not impact.In order to improve drilling efficiency of imported drilling jumbo in downhole production and reduce consumption of materials and spare parts，fixed bolts hole is applied in drilling machine end cover， and fixed boles are also used to improve fastening condition and relax.The drive shaft of old trackless equipment is reformed to meet the pressure test requirements，and it can judge the hydraulic system bug of drilling machine quickly，raising the maintenance efficiency；Rebuilding the original balance tank on impact piston and seting symmetrical oil pan on the cylindrical surface helps completing the shock cycle，and meeting the needs of drilling.Technical innovation of rock drilling creats a good condition for mine production，improves serviceability rate，utilization rate and production efficiency，and the failure rate is also decreased.
Added value tax in import and customs duty are free for gold ore.One block of “gold ore” was checked by one Custom to identify its property.This paper demonstrates the product belongs to gold ore by X ray fluorescence and diffraction analysis and comprehensive analysis of appearance，physicochemical characteristics in its different state，which has natural characteristics and with gold content of 51.3 g/t，silver 815.5 g/t.The phases is dominated by quartz，sphalerite，galena，chalcopyrite etc.One identification program and method for gold ore is formed in order to offer scientific basis to Custom’s inspection.
Based on the analysis of MapGIS software system and spatial multivariate geoscience information prospecting of eastern Junggar，contrary to vector correction of non-vectorized random parameter geological map data，we present basemap vector correction method of the key points matching method.Furthermore，against vector correction of non-registration vector map，we propose two kinds of solutions，that is key points coordinate method and key points distance method.The results show that key points matching method can effectively solve the problems of large cumulative error and low efficiency caused by traditional single basemap method.For vector correction of non-registration ordinary digital maps，we use key points coordinate method and key points distance method to achieve this process，and the former is the best way to solve vector non-registration correction diagram，it is applied to the original basemap with four or more key points，the maps primitive information is accurate after correction，it does not adjustment point and line primitive parameter in late stage，with small error and high efficiency.When there is little key points in non-registration vector figure，we can use key points distance method to conduct correction instead of key points coordinate method.The three methods have an important significance to improve the utilization levels of outcome data，promote the validity and accuracy of spatial multivariate geoscience information prospecting.
In order to utilize mineral resources effectively and maximize the benefits，research of separation flotation and ore blending flotation to various types of ores which fed into the process of Linglong concentration plant was introduced in this paper.And the results showed that under the current conditions of technique and economy it was feasible for this flotation method to deal with highly-oxidized low-grade residual ore from upper middle.By using the current flotation technology，the flotation index would not be affected if the amount of residual ore fed into the flotation circuit was less than 30 percent of the total amount of ore.The research findings were applied to actual production in the year of 2011，the number of the processed residual ore was 273 thousands tons，the grade of residual ore was 1.1×10-6 and the grade of concentrate was 76.89×10-6，and the flotation recovery rate was 95.26%.Tremendous economic benefits of more than 50 million yuan was obtained in that year.
In the process of cyanide production，the gold concentrate fineness entranced the cyanide system is very important for leaching indicators.In order to improve the cyanide leaching rate，it is needed to make full use of existing equipment resources in the production practice of concentrator.Gather and analyze the related data of regrinding and grinding classification system，the reasonable process parameters have been determined.Optimized and adjusted to a series of parameters-milling rotational speed，grinding medium，cyclone parameters，and ore feeding and ore exhausting，to improve the gold concentrates fineness in stages.Finally，the content of gold concentrates fineness （400 meshes） increased up to more than 90%，and the leaching recovery rate increased by 0.17%.It has reached the purpose of reducing electricity consumption of the grinding classification system and cutting the cost to increase the profit.
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