Through comparison the ore grade distribution situation of Maquan gold deposit and the corresponding mathematical model,we discover ore grade distribution law shows log-normal distribution,theoretically prove that ore grade is controlled by 1~2 major geological factors,the occurrence mineral of gold elements is mainly arsenopyrite and pyrite mine,gold has a selective for sulfide,but forming of the deposit is more times superposition results. The mathematical model of ore grade distribution is mean 3.566×10-6,2.006×10-6 variance for log-normal distribution. Through study of the average grade of ore deposits,geometry average,arithmetic average and the coefficient of variation,we think that the deposit belongs to grade uniformity deposit,and boundary grade is 1.0×10-6,lower limit of high-grade is 29×10-6.High-grade orebody （10×10-6~17.78×10-6）has prospecting potential.23 exploration line of the deposit is located in the elevation between 1 800~1 700 m,and it has great development potential.
Axi gold deposit is one of the typical gold deposits in western Qinling metallogenic belt.Gold mineralization is closely related to magmatic hydrothermal and wall rock alteration.The mainly useful composition in ore is gold,and paired useful component is silver.The mainly harmful compositions are As,S,organic carbon.Mainly gold carriers are pyrrhotite,arsenical pyrite,stibnite and morass ore,and the minor is quartz.Mineralization has different metallogenic epochs or ore-forming stages including gold-arsenical pyrite-pyrrhotite-quartz stage,gold-stibnite-Calcite stage,hypergenic stage.Gold in ores are mainly particles,grains gold,and in form of inclusions-gold,interparticle-gold,crevice-gold hosts in rocky minerals and metallic minerals.
Hadamengou gold mine has a large deposit scale by proven,gold deposit is strictly controlled by tectonic, also has its own unique,such as high gold background values of wallrock,piedmont red fragments altered belts, thick crystal biotite granite pegmatite,and multi-stage intrusion of magma,and it become an indispensable factor in the formation of gold.Take mantle branch theory as a guide,throughcomprehensive study of geological features and other factors,we consider that Hadamengou gold mine belongs to fracture-altered rock typedeposit,wulashan rock Group is an important ore source,EW-trending primary and secondary detachment is the main leading-host structures,multi-stage magmatic activity provide heating,hot water and some minerals for deposit,mineralization is close related with biotite graniticpegmatite and brittle deformation of quartz veins.We discuss metallogenic regularity of deposit,and propose ore prospecting.
Dongwuqi area is located in the northeast of Inner Mongolia,the structural feature is complex and magmatic is activity in this area,polymetallic deposit spread everywhere,it is an important gold,silver,copper,lead,zinc, tungsten and molybdenum mining area.NE,NNE trending faults are ore-controlling structures,the fold and fault provides leading ore structure.The development of continental volcanism-subvolcanic and Mesozoic monzogranite provide the necessary heat and material sources for the forming of mineral.Comprehensive analysis,we think that the area is the favorable area looking for gold,silver,copper and polymetallic deposits which are related to magmatic activity,also it is the favorable position of occurrence of altered rock type and magmatic hydrothermal type polymetallic deposit.
In order to expand the mineral reserves,lower prospecting risk,we use geology survey,soil geochemistry and adsorption water-in-oil mercury and other various research methods in Maluping gold deposit for gold prediction research. According to the geological and geochemical characteristics of landscape conditions,the soil geochemistry gold anomalies and soil adsorption characteristics of morphology mercury anomaly deposit prospecting preliminary analysis and evaluation prospect,propose a deserves further job prospecting target area.Research results show that the soil geochemistry and adsorption water-in-oil mercury is effective methods of geochemical ore-prospecting prognosis in the area.
Guoluolongwa gold deposit is located Wangbaogou Group of the east Kunlun orogenetic belt.It is controlled by a ductile shear zone.Mineralized rocks are chlorite phyllite,siliceous slate,and so on.There are plenty of vein rocks in the metallogenic region.Mineralize type includes quartz vein,altered phyllite,fracture zone,vein-like mass.The ore is low content of sulfide,mineral composition is simple in the ores.The study results of sulphur and lead isotopes show that Guoluolongwa gold deposit is very like the others gold deposit of the east Kunlun minerogenetic region.It is a typical type of orogenic gold deposit.It is related to intermediate -acid magma intruded in Varisian-Indian-China periods and it belongs to medium-temperature hydrothermal type.
Yelonggou gold mine is located in the east of Kunlun metallogenic belt.It occurs in the early Proterozoic Baishahe rock group and Variscan granodiorite area.Through 1∶5 million stream sediment survey,we preliminary identify the distribution and assemblages of elements,unusual intensity and concentration zone characteristics in the area.Furthermore,we circle a higher peak gold anomaly in the area.Through 1∶2.5 million stream sediment,we find two alteration fractured zone which containing gold,and gold grade is 2.8～7.28 g/t.We analyze the ore body shape, occurrence,structure and spatial distribution of mineralization and geological structures,stratigraphy and magmatic relations and other aspects of ore bodies and abnormal distribution,study the formation of deposit,fracture tectonic system and distribution of magmatic rocks.On this basis,we analysis of the relationship between polymetallic ore mineralization spatial distribution and tectonics,formation,magmatic rocks.Finally,we establish the indicator for prospecting and to learn the role of the direction.
Jiawu gold belt is situated between western Qinling and eastern Kunlun,which is one of the important gold and polymetallic ore belts in Qinghai Province.According to preliminary research,it is a kind of microscopic disseminated gold deposit which is directly controlled by structure-alteration zone,and has a genetic relationship with sedimentation and magnetic activity.Up to now,the proven reserves of total 22 ore bodies are over 20 t.Based on the original data and work practices,we made a further discussion for the metallogenic conditions,then we draw a conclusion that the area is well exploration prospects.
We research geological setting and ore-controlling factors of Co polymetallic ore in Kendekeke mine area by using the technology of geology and geophysical-geochemical,and the methods of trenching,drilling,geologygeophysical-geochemical profiling measurement.The results of the research show that Kendekeke area is a typical composite deposit,the elements of iron, gold, cobalt, bismuth, lead, zinc, molybdenum and copper can be constitute orebody independent.Ore-forming elements not only can symbiosis,but also they can be associated,they are close contact in the space.The main orebody is calcareous clay chert,it shows strip and worm shape,and it has obviously thermoplastic deformation,the genesis can be attributed to hot water deposition-reworking type deposit.
Starting from morphology,composition,structure and properties,we can research the typomorphic characteristics of pyrite,it is great significance for theory research and evaluation of gold deposit genesis.According to system research of pyrite occurrence,morphological characteristics,chemical composition,lattice parameter,thermo -electric coefficient,we find the relationship between pyrite genesis and gold mineralization.With the evolution of ore-forming stage,N-type pyrite shows increase trending,but P-N type shows decline trending correspondingly,also the research shows that the peak value of N-type pyrite thermoelectric coefficient （-369~-400 μv/℃）can be used as the typomorphic characteristics of gold prospecting of Bushang gold mine.In addition,the value of a0 in pyrite is smaller at the main ore-forming stage,and the share of P-type pyrite is lower,mainly to N-type,it can be used to guide gold prospecting of the area.
Linglong granite,Guojialing granodiorite and vein rocks constitute magmatic rock system of Bushang gold deposit.Linglong granite distribute most widely in the region,invaded by Guojialing granodiorite resembling a cloak. There are several times vein-rock activity,going with gold veins activities.There is close dependency of structuredistribution format and forming time for gold deposit veins and vein rocks.At the same time,take vein rocks as a bridge,we find out the formation cause of Bushang gold deposit and build a prospecting model.
Dongwuqi area has complicate tectonic development,multi-episodic magmatic intrusions and mineralization associated with the magmatic intrusions.Gold and polymetallic deposits in this area are hydrothermal and metasomatic deposits related to Variscan,Indosinian and Yanshan intrusions （or volcanic rocks）.Based on regional geological and metallogenic background,geological,geophysical,geochemical characteristics of deposits and ore spots in Dongwuqi area of Daxing’anling,prospecting indicators and orientation are provided,prospecting ideas of ore district and its periphery area are also put forward.
In the exploration of substitute resources of Laozuoshan gold mine,the main purpose of geophysical exploration is to use IP sounding,earth-well IP measurements to find geophysical anomaly,with geology to recourse the extension of known orebody,and census prospecting in outside of the mine.By using the method of high precision magnetic survey,IP ladder,earth-well IP measurement and IP measurement,clarify the application effect of the geophysical methods,and show that using of integrated geophysical method to look for buried metal sulfide orebody in the area is an effective method.
There are a lot of wastewater,waste gas and waste residue occurring in the process of gold smelting, which are seriously harmful to environment and humanbeing’s works and life.Therefore,efficient disposal to the pollution from the process of smelting and reasonable resource utilization to the waste,can not only satisfy the need of environmental protection,but also bring more benefit to factories.We will briefly summarizes the pollution in gold smelting,and the corresponding methods of disposal and resource utilization will be described.
We choose 717# and 704# resin exchange method to treat containing cyanide wastewater,recovery of cyanide and heavy metals,and recycle waste water.Though a series of test conditions,we demonstrate that it is possible to treatment poor liquid using resin exchange method.
The powder samples were pressed into slice by using high density polyethylene powder to trim lining, determination content of Mo and commonly associated elements W,Sn,Cu,Pb,Zn,Bi content by wavelength dispersive X-rafluorescence spectrometry.According to the characteristics of molybdenum ore grade,using national standard samples with a large molybdenum mine established by combining samples of the calibration curve,measuring range from 0.03% to 1.51%,The matrix effect was eliminated by using empirical coefficient method.The determination results of the method had good agreement with those of wet method.The relative standard deviation of each component were in the range of 0.073%~7.35% in 11 times of determination for same sample.The results of Mo,W, Sn,Cu,Pb,Zn,Bi obtained by the method were in good accordance with certified values.
According to the actual situation of Shicheng Mining in Jinzhou Mining Group,take pulse patio group as air shaft,establish mechanical ventilation system.In addition,we describe the problems and solutions of mediumsmall sized metal mines which are long-term use of natural ventilation in the ventilation process,in order to obtain good ventilation,and create a comfortable and efficient working environment for mine workers.
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