Sanshandao gold deposit,which is produced in Sanshandao-Cangshang fault belt,belongs to large-typical Jiaojia-Linglong type gold mine.Because of the reduction of resource,it is necessary to analyze mineralization and prospecting forecast,which can be used to direct the exploration in the deepness or surrounding of Sanshandao gold deposit.Based on the comprehensive analysis of spatial distribution of Ⅰorebody,and the trends of ore grade and thickness,combined with regional metallogenic characteristics,we think that the depth extend of Ⅰorebody is more than 2 000 m,the main minable-ore distribution in the plan or profile is in pod typology,the direct correlation was significant between magnetization intensity and alteration zone,as well as the quartz vein type orebody can be found in subsidiary fracture.Meanwhile,we also show that much more bucked ore is remain in the middle position between 28th line to 40th line,the deepness of Ⅰ orebody north position between 40th to 48th line,and the surrounding of Ⅰ orebody north position.We conclude that much more resources may be found in deepness or surrounding of Sanshandao gold deposit,and much exploration work should be done.
In the process of researching ore mineral in Zhaishang gold deposit,we discovery Petzite, Muthmannite,Coloradoite,Melonite,and emphasis study on the characteristics of mineralogy and trace element variation of telluride and native gold.Telluride performance the paragenesis of Ag 3AuTe2（petzite）-AuTe2（calaverite）-Au（nativegold）in the deposit,it shows that the telluride form at low temperature.native gold or include Ag native gold performance the paragenesis of Ag3AuTe2（petzite）-Ag2Te （hessite）-Au （Ag,Au）in deposit.The generated sequence of telluride and native gold in Zhaishang gold deposit: As-petzite-petzite-muthmannite-calsverite-coloradoite-electrum-native gold.The mineralization mechanism of Zhaishang deposit,when the S element of ore-forming fluids exhaust,Te element content increase, and start form Ag-telluride,such as hessite and petzite,because there still remain a small amount of As element in fluid,so the petzite contain small amount of As.While Te element in fluid deplete, form electrum and native gold.Zhaishang gold deposit have the conditions of foming large gold deposit,it belongs to the gold deposit related to granite.
The grassland overburden area of Inner Mongolia is an important area for forecasting concealed orebody recently.In order to seek a sort of fast and effective prospecting method in these areas,we use the high-power IP method and EH4 conductivity image system to test and explorate the mineral of multi -metal iron deposit, Alukeerqin,Inner Mongolia.The survey results of high-power IP method show that three high resistivity zone and one low-resistively abnormal belt can be recognized in the apparent resistively map.The high-resistively abnormal of high -polarizability are probably caused by altered and mineralization belt.The results of EH4 system measurement illustrate a clear geophysical abnormity in depth of the deposit.The obvious and visible abnormity, which correspond well to the known altered and mineralization belt and the results of IP survey,indicate that the deposit has a good metallogenic prospects.Practice shows that the integrated methods are very effective in prospecting the concealed deposit in the grassland overburden area．
Multiple new methods of geo-electrochemistry,soil ion conductivity and the mercury absorbed in soil are applied in the study of gold Barun deposit in Abaga Banner,Inner Mongolia.Feasibility study on the known gold deposit prospecting shows that every method can find anomaly in the topper of the gold deposit,and the gold geo-electrochemical extraction coefficient in the deposit could be calculated.So the general anomaly was delineated.We found the blind gold deposit in the research area and delineated the prospecting targets by these methods,which forecasts the direction for the prospecting of the area.
Fluid plays a vital role in the ore -forming process of hydrothermal deposit.Because of its nicer universality and stability,fluid inclusion is the best representative of primitive ore-forming fluid.According to the temperature,pressure and composition analyzing,isotopetracing,and age dating of fluid composition,many important problems of mineral deposit can be resolved well.We introduce the main application and basic theory of fluid inclusion in mineral deposit,such as determining the ore-forming temperature and pressure,deducing the ore-forming and denuation depth,analyzing the composition of the ore-forming fluid,reflecting the ore-forming environment （pH and Eh）,distinguishing the origin of ore-forming materials,ascertaining the ore-forming age,dividing the deposit type.
PGE resource value of the black rock series is the driving force of PGE deposits industrial index update. Advanced comprehensive utilization technology is the core competitiveness of PGE deposits.Comprehensive utilization of black rock series is a set of industry chain,which consists of comprehensive study,overall development and safe to use,and involves in many fields of geological exploration,mineral smelting,material,environmental protection,etc. Because of the PGE deposits of black rock series without exploration standard now,needing update deposits industrial index, we suggest that make the black rock series of PGE deposits alone as a new ore type,and set u“pPGE of exogenesis type”to promote exploration process of black rock series related ore deposits.
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.
Dongyaozhuang greenstone belt gold deposit occur in the greenstone belt of Wutai mountain,the ore formation is new Archean Wutai group Hongmen rock group green schist,it has obvious layer controlling.The deposit is formed by three orebodies,Ⅰ,Ⅱ,Ⅲ,the shape of orebody is bedded and vein,north-east trending.The bearing-rock is albite sericite schists,quartz schist,chlorite albite and diabase dikes,which are strongly pyritization,silicification and carbonate.The wall-rock alteration develop,the alteration is mainly quzatz,sericite,chlorite carbonate and pyrite,from inside to outside,it shows zonation.The deposit has obvious geological,geophysical and geochemical prospecting criteria.
Through introducing the regional geological features and metallogenic conditions in Gouli area,we analyze the geochemical characteristics,metallogenic conditions and geological exploration level of the known deposit （point）,the deposit types are quartz vein type,tectonic altered rock type and broken tectonic altered rock type.Guoluolongwa and Asiha gold deposits,which have been found in the area,have medium-large scale.This area has the potential of finding a large orogenic-altered rock-type gold deposit.
Luotuohe gold mine is located in the western of Tuole mountain metallogenic belt,the orebody produce in the contact of purple conglomerate and sandstone of the Upper Devonian,its metallogenic is strictly controlled by tectonic,NWW-trending secondary faults activities repeatedly in the process of mineralization,this provide condition for superimposed,enrichment and mineralization of the deposit,and themetallogenic characteristics of hydrothermal superimposed is obvious,1∶50 000 geochemical anomaly shows that Au、As is weak anomaly.We point out the next prospecting of this area,on the base of the analysis on the metallogenic characteristics and geochemical anomaly characteristics of the deposit.
Split rockbolt has been applied widely in mining because of its excellent rock-anchorging. Based on the experiment of using split rockbolt support in roof stope of fractured ore -bodies in Yongshaba mine，the paper proves that split rockbolt support in fractured ore-bodies has advantages over the traditional support and other rockbolt supposing types．Meantime，the paper states that it is a new，timely and effective supporting form and it is a reform direction for developing support．
According to the occurrence conditions of orebody in Sizhuang mine area,learning the practical experience of advanced road-type mining in Jiaojia gold mine,we use DT-2D scraper to mechanization out-mine firstly, significantly improve the recovery efficiency of mining,and achieve successfully application of efficient-mechanized route recovery mode.The out-mine capacity of Sizhuang mine area is increased from 200 t/d to 800 t/d,it has laid a solid foundation for achieve the project of 6 000 t/d in Jiaojia gold mine.
The mechanization level of Ⅲ vein orebody in Jiaojia gold mine,which is discovered,recovered and prevented later thanⅠvein orebody,is difficult to be raised because of the ore occurrence conditions.This causes the results of settlement ratio imbalance,ventilation system disorders,and makes the production management more difficult. To solve these problems,we streamline the processes of Ⅲ vein orebody by optimizing mining methods according to the principle of advanced technology and economic rationality.Secondary avalanche process of Ⅲ vein orebody groups is identified according to the situation of backward,slowly recovery and difficult to manage.The results show that the optimization process works more effective,costs less tunneling project investment,accelerates the relative recovery speed,also has more balancedand stable mining settlement.
The smelting plant of Sanshandao gold mine expanding the scale of production.Gold mud raw materials are complex.These cause the poor effect of smelting wastewater treatment and the content of the Cu,Pb,Zn beyond the drainage standard.To solve these problems,this factory compared the research methods of smelting wastewater treatment,and chooses a targeted,economic and practical process to realize the maximization of benefits.
We discuss the process of detection limit and how to choose the reagent blank and improve the detection limit by taking determination of trace gold using foam separation enrichment-Graphite Furnace Atomic Absorption as an example. The results show that the detection limit calculated from reagent blank can only represent the instrument detection, but real blank can reflect the true method detection limit which is used in this study, and the detection limit of trace gold determination by Foam Separation Enrichment-Graphite Furnace Atomic Absorption can be effectively improved by adding ascorbic acid or increasing the injection.
Taking the Cangshang mine as an example,we optimize the main mine technical and economical indexes dynamically using the technology of System modeling and fuzzy synthetic evaluation,based on the related data of Cangshang mine.
In view of low precision,short distance,precision change disorder appeared in the process of measuring operation,based on the basic principle of total station hidden point measuring in single distance,we analyze its accuracy and find its erroneous source.Regarding with coordinate survey of testing spot in barrier as with survey station, we propose one kind of new surveying method,and verify it in field measurement,compared to total station hidden point measuring in single distance.The results show that this measurement method can obviously increase measuring accuracy and expand distance range.
Using the electromagnet as the driving force,a point -action automatic sampler is developed,which is dried according to the lever principle.Point -action automatic sampler can not only adapt well to the sampling environment of concentrator,but also meet the requirements of the mineral processing technology.It’s of important practical significance because it strengthens the management and improves the enterprise management efficiency by solving the current problems of Non-standard sampling and the labor -intensive in the concentrator.
The selection of concentrator site is the important part of company construction,attention should be paid. Taking the selection of multiple concentrator site in high altitude as an example,we analyze the effect of high altitude area on the mine workers,and propose the design principle of People -oriented,and point out the attention problem in selection of concentrator site,it provides reference for similar mine.
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