In order to effectively guide further exploration,we study the metallogenic regularity of Boka gold deposit in Yunnan Province.On the basis of previous work,combining the field investigation and previous data studied further,we summary the characteristics of Xinshan-Majiagou gold deposit,analysis the ore-controlling factors,discuss material source and formation mechanism of the Xinshan-Majiagou,conclued that gold deposit belonged to gold broken alteration type gold deposit,establish the signs of the ore prospecting for the Xinshan-Majiagou gold deposit,which can effectively guide the next exploration.
By researching on the characteristics of trance elements and REE of granite in Ningchanhe area of northern Qilian orogenic zone,we find that granite of Ningchanhe area enrich LREE and REE partition curve is right type,it belongs to the granite formed by different degrees of partial melting of crust.The standardization distribution patterns of trace elements show that incompatible elements（K,Rb,Ba,Th） enrichment,medium incompatible elements（Ce,Nb） selective enrichment,while compatible elements（Ta,Yb） assuming a depletion trend.Besides,the tectonic setting in which such granite characteristics occurs may include the feature of volcanic arc granite reflected by the Qingyang sequence and the orogenic one by every unit of the Ningchanhe sequence.
Ductile shear zone gold deposits become the focus of attention of geologists because of its unique geological features.Ailaoshan is the most important ductile shear zone,which consists of more than ten medium to large sized gold deposits.In terms of regional structure,these gold deposits are located in the epimetamorphic belt in the fault zone of Ailaoshan.All deposits are subject to second-level fault system,but regarding of the specific conditions of ore-controlling,the individual gold deposit which has its own characteristics formed differently.Studies of these deposits are still developing.Further study is needed,especially for the gold metallogenic law and metallogenic mechanism of the gold deposits belt in Ailaoshan as a whole.
Nacheng silver gold deposit is located in the southeast of the center of Wuchuan-Sihui rift zone.It’s located in the southeast of northeast trending Yuntang-Sanwupai secondary fault and the northwest of Huanglingding-Heshuikou fault’s composite parts.16 silver-gold veins,which are produced in the altered fracture zone,has been found in the mine.In the spatial arrangement of the veins are the nearly parallel on echelon left rows. Two industrial ore zone have been delineated.The formation of silver-gold deposit is due to the tectonic fragmentation and alteration,the content enrichment of gold and silver increased a lot and were large-scale activated and migrated into the favorable positions by many times and strong geological reconstruction which finally came into being the industrial ore.It is the product of the tectonism,metamorphism,metasomatism and magmatic activities.It belongs to the medium-low temperature hydrothermal water fractured altered rock type of the silver-gold ore deposit.
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.
Guloushan ore section is located in the northwest of Jinlongshan gold deposit,at present the reserves of Qiuling ore section has been beyond 50 t.Since research degree is lower,there is not got big breakthrough in Guloushan ore section.Through analysis of the Guloushan ore section primary halo,As,Sb and Au elements association has higher correlation and the correlational dependence,it indicate the main elements association of the gold deposit principal in this place are As,Sb and Au element,and we establish a geochemical primary halo ideal model,the characteristics of elemental association indicate that there are quite exploration space in the lower part of the ore section.
The study area is located in the southern Siberia plate by orogenic belt,the middle east to the greater hinggan mountains on variscan,yanshanian iron,tungsten,molybdenum,silver,gold,copper metallogenic belt on the twenty-fourth bridge metallogenic belt,and can be divided GaLa mountain forest field-Xinjiang uygur autonomous township gold,silver,zinc polymetallic mineralization and belt,xiaoxinganling Lord ridge-tsubaki yeshan gold,silver,copper polymetallic mineralization and belt,Hejie mountain-Iraq zhaoshan gold,silver polymetallic mineralization and took three mineralization and belt,through the geochemical reconnaissance delineated,23 from combination abnormality area,five metallogenic prospective area,the area almost 44 square kilometers,the optimum five prospecting target area,shows better ore propects.At present already discovered gold tsubaki yeshan dot,blessing grassplot gold mineralization point, north wide river gold mineralization point,truth mountain gold mineralization spots deposits（point）,gold mineralization types of tectonic altered rock type,with north wide river rock formation, GuiHua and pyrite close relations with gold mineralization.Tectonic altered rock type gold deposits will be GaLa mountain area for a period of time main minerals.
Huatong copper deposit is located in the Jiaodong-Liaoning Archean-Proterozoic and Yanshanian copper-iron-gold-magnesite-diamond-talc-lead-zinc-silver metallogenetic belt,in the south part of Tancheng-Lujiang fault zone.Based on comprehensive analysis and studies of mining data in Huatong copper deposit area,we summarize metallogenetic environment and spatio-temporal distribution of Huatong Au-Cu-Mo polymetallic deposit,and presente a metallogenetic model for the area.Through research of ore-controlling structures,magmatite and strata in the adjacent area,we apply the proposed model to metallogenetic prognosis for the adjacent area and present three perspective zones of Yangshan-west Ertaizi,Xujiatun-Longmentang and Dazhangtun.The preliminary exploration validate the results.This study provides new evidences for ore exploration in the adjacent area.
Geotectoniclly,Hadamengou gold deposit is the Yinshan apophysis level of Inner Mongolia axis middle part on the west segment of northern edge of Huabei platform.So far the explored volume of resources has reached at 70 t.The piedmont potassic zone,which is a potash K-feldspathization alteration fracture zone,located in the southern part of the ore district.In a period of time,it's believed that piedmont K-feldspathization zone is the main ore-conduit structure,and it is NE-direction.But the relationship between deep-occurrence and vein is unclear. By field survey,the paper research that it is NW-direction or NWW-direction.Method of geophysical electrical prospecting section shows that the upside of deep-occurrence is steep and underpart is gentle.The ore vein is dissected deeply.By studying and analyzing the forming time of piedmont K-feldspathization zone and ore vein,we think that it is not much possible gold ore-conduit structure which is piedmont major fault.
We discuss the ore-formation function in Jiapigou gold mine,ore-formation belt is closely related to the Archean metamorphic rocks,mantle-derived magmatism and ductile shearing.The ore-formation fluid is mainly mantle fluid and the ore-formation materials mostly come from mantle.The ductile shearing belt are not only the migration channel of ore-information fluid,through mantle activity and its concomitant secondary fault structure,but the advantage space of ore-body emplacement.We discuss the basic geological conditions,under which the main part of Jiapigou gold mine becomes a large northwestward ductile shearing belt and its concomitant secondary formation belt,northeastward formation belt（i.e. the ore bed in this area）,are widely distributed Archean metamorphic rocks,molten magma and dike,and strong ductile-brittle structure activity,the gold mineral body （quartz vein） is controlled by the secondary fracture on the both sides of the ductile shearing belt, and wall rock alteration is sericite-quartz alteration,silicification,chloritization and pyritization.The ore-exploration study demonstrates the deep part of the mineral bed in this area,has the same large ore-formation potentiality,so the deep part of mineral-bed ore-formation belt in Jiapigou area should be a good ore-formation prospect (the second ore-formation bench).
Jiuqu gold mine encounter mid-thick orebody in the mining,there are some problems while using traditional shallow hole shrinkage method,the exposed ares of stope roof is too large,security can not be guaranteed,the recovery rate of ore is low.Though select shallow hole shrinkage method combined with mid-deep hole blasting,it can protect worker’s safety,improve the recovery of ore,and shorten mining cycle of ore block.it is a new try to mining mid-thick orebody.
While application high water consolidation of fill mining method in Linglong gold mine,according to different occurrence condition of orebody,we use technically feasible,economically justified,safe and reliable mining method,and solve a series of technical problems of unstable orebody mining.We obtain good effection at the respect of control of mining sites,inhibitory activities of pressure,support of filling,reduce the dilution and loss,and obtain a better economic efficiency.
According to the actual occurrence condition and roadway layout of orebody in Xinhui gold mine,we build 3D orebody and roadway model using AutoCAD,add data information of engineering geology,hydrogeololgy,mechanical properties of rock,operating conditon of equipment into the model,so as to construct virtual mining.
KyaukPaHto gold mine is a large state-owned gold mine of Myanmar,and production capacity designing of 1500 t/d.It has all technology such as washing,gravity concentration,flotation,roast,cyaniding（including of cyaniding to roast product of flotation-concentrate and all slime cyanidation process of oxidized ore）,and the desorption and electrolytic extraction technology for carrying-gold carbon and gold-mud smelting method,and so on.The technology is complex and comprehensive,it has certain model significance.The gold-mud casting heavy blowing method has a better spread value.
The QX fuel,KF-3 and 11# fuel were investigated on the flotation process in the flotation laboratory of Sanshandao gold mine.The results showed that the consumption of QX fuel is 15 g/t,the flotation recovery achieved on average 95.32%,the tailings grade is 0.10 g/t,and the average high-grade ore ratio increase to 20.62.These indicators showed that QX fuel was more suitable to the flotation of Sanshandao gold mine.
Though research on flotation process of Au-Ag-Cu polymetallic ore with barite，we find some methods to solve settle-down flotation accident and improve recovery of Ag and Au.In the flotation process，it is very preferably to flotate Au -Ag -Cu polymetallic ore，the expected purpose is achieved，and there are some reference to flotate such polymetallic gold ore.
Though discussing on the main factors of affecting grinding and flotation operation,we determine the conditions which fit for the ore of nature changes.In the premise of ensuring the quality of concentrate,reach to the purpose of improving recovery of flotation,and we have a good economic benefits.
Resin slurry gold extraction technology is a no filtering technology,it has the advantages of high absorption speed,large capacity containing gold,easy desorption and regeneration,good wear resistance,anti-pollution ability, wide application,and so on.After using resin slurry gold extraction,the cyanide leaching rate increase from 90.82% to 96.88%,increased 6.06%,the total recovery rate of gold ore dressing increase from 90.28% to 95.86%, increased 5.58%,the grade of gold mud of desorption electrowingning increase from 15% to 70%.
Based on using wet pure gold mud of enterprise deal with cyanide wastewater,we refinery gold using chloride pure gold mud,because gold mud contains a large number of cyanide,cyanide wastewater treatment processes produced in the prepreg general is 2 000 mg/L.State regulations contain cyanide concentration may not exceed 0.5 mg/L,this enterprise requirement of cyanide wastewater discharge concentrations may not exceed 0.04 mg/L,leaching of wastewater treatment must pass off cyanide to discharge.By actual fumbling with refinery process equipment, using existing acid chloride and adsorption method to emerge cyanide in wastewater,cyanide complex total content 0.04 mg/L，achieve wastewater discharge standards.
Through analysis on the principle of GPS height measurement,we introduce common method of GPS height measurement,base on different network of GPS control survey grid,we obtain two mainly methods of elevation model fitting,polynomial curve fitting and polynomial surface fitting,and propose the main measurements and methods to improve accuracy of GPS height measurement.
Based on the process of strong pressure activities in Jinqingding mine,we describe the mining pressure control method of Jinqingding mine,and solve the problems of compressive failure roadway and stope roof fall.Finally, we obtain good economic and social benefits.
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