On the basis of accounting for the geological site of the research area,we discuss the relationship of cause and effect between circular structure and linear structure,conject the genesis of circular structure.It indicate that there are close relationship between gold mineralization and circular structure,also its interrelated fracture,wall rock alternation and gold geochemical abnormity,and we have delineation ten prospecting target area.
By analysis on the characteristics of hydrogen,oxygen,sulfur and lead isotope of Kuangou gold deposit in Liziyuan area,we discuss the issues about the nature and source of ore-forming fluid and the source of metallogenic material.Hydrogen and oxygen isotope results show that ore -forming fluid of Kuangou gold deposit is a mixed sources,it is mainly magmatic hydrothermal,mixed some precipitation and metamorphic hydrothermal.Sulfur isotopic composition show that ore sulfur of Kuangou gold deposit is mainly magmatic sulfur,and mixed stratigraphic sulfur. Lead isotopic composition show that metallogenic minerals are from lower crust and upper mantle,it is the crustmantle mixed source.During the process of upward migration of ore-forming fluids,it is mixed stratigraphic lead,and mineralization has close relationship with quartz syenite rock in Mesozoic.
Though induction and summarize the geological and geochemical characteristics of Gemalong lead-zinc deposit in Qinghai Province,we research and analysis the geological characteristics and geochemical anmalies,and overview the distribution of strata,fault system and igneous rocks,forecast the possibility of deep mineralization, and provide advice and guidance or later prospecting. With the increasing difficulty of prospecting,geochemical exploration methods become increasingly important, and its application become widely. The discovery of Gemalong leadzinc deposit is another successful example,by research and summary of the geological and geochemical characteristics of this area, it is not only important significance for mining,but also good reference for similar regions.
Nangetan mine area located in Qimantage-Dulan back-arc residual basin at early Paleozoion.The stratum of this area is mainly Ordovician-Silurian Shaliuhe group,structure is mainly NE、NW trending.NE trending is mainly host structure,expose Triassic granodiorite and monzogranite,it has a good geological background.The characteristics of regional magnetic anomalies are evident,and it has a good iron,copper,gold and multi-metal exploration prospecting.
Ajile gold and polymetallic mine is located in the northeast of Dongwuqi in Inner Mongolia,it is a prospecting ploymetallic mine found in survey working.There are complex tectonic and good geological conditions in the mine area.The mineralization and alteration fracture zone is developed,the earth’s surface shows a strong alteration, such as silicification,iron and manganese carbonate.Polymetallic deposit spread in the mine,the breccia rock and altered fracture zone formed in tectonic activity,the geological body of alteration and mineralization,the polarization gradient anomalies delineated in geophysical induced polarization measurements,geophysical and geochemical anomalies superimposed part are very important symbol of finding polymetallic ore.Ajile area has mineralization conditions of finding medium sized gold and polymetallic.
The discovery of Greenschist-type gold deposit in Youlougou area is the breakthrough in the center of Inner Mongolia.Then,according to the result of exploration,we evaluate the exploration methods and technologies for Greenschist -type gold deposits in the region which has an important theoretical significance and reference value. We mainly research the applications of integrated geophysical and geochemical methods to Youlougou gold deposits in Chayouzhongqi,Inner Mongolia.Through the induced polarization method,electrical resistitivity method, magnetic and gravitational methods and geochemical method,we can get a markable geophysical and geochemical show.Summarizing greenstone gold deposit of experience and ore prospecting laws will help to improve the precision and accuracy of gold prospecting through geophysical and geochemical methods,which will have guidance significance for Greenschist-type gold deposits.
The margin of Zhenan-Xunyang basin distribute zinc-gold-antimony deposits,through analysis,we think that the lead-zinc-gold-mercury and antimony deposit is a metallogenic series.By comprehensive evaluation for 1:5 million stream sediment anomaly of Xiaohe-Xigou area,we delineat contours,combined with remote sensing,distribution characteristics of veins and ore-controlling factors,we think that the east of Xiaohe gold deposit is favorable position,though project expose,we find three broken belt,one gold body.By analyzing the characteristics of the regional structural features,we predict that the east of mining area has good mineralization,and find two mineralization bodies.Draw the successful prospecting methods of Xiaohe-Xigou area,we comprehensive evaluation of the stream sediment survey,and delineat three A-type prediction area,five B-type prediction district.
The difficulty and hotspot research for mineral deposit geology is chemical fractionation and enrichment mechanism of power -leading heat fractal dispersion.Take Guanlizhuang mineralization area as an example,the semiquantitative-quantitative changing-relationship between power-leading heat and fractal dispersion mineralization mechanism is studied deeply by geological characteristics,tectonic thermal -effect control to rock mass,vein rocks and orebodies and some of value calculation.
Abstract：Jinqingding gold deposit is super-large quartz-vein gold deposit，now the tunnel engineering control the verical depth of orebody is more than 900 meters，with retained reserve decrease and prospecting depth increase， the geological prospecting is difficult，through research of the structural characteristics,cause mineralogy characteristics and structural superposition dizzy model,we use comprehensive research results to guide deep geological prospecting，and we obtain a good result.
Based on the study of geology and causes of Yingchang gold deposit,we suggest that gold mineralization hosted in the lower Carboniferous Xuebaoding formation,lower Permian upper Sandaoqiao formation,mid-Triassic system lower Zagunao formation.Gold mineralization is closely related to pyritization,arsenopyrit mineralization, cinnabar mineralization,limonitization,realgar mineralizantion and orpiment mineralization.During in the diagenesis stage,mechanical handling and sorting,through,which the gold-rich brine can move to a site of deposition,After that the thermal energy produced by tectonic and regional metamorphism heat the water,which was stored in the rock pores and cracks，formed sulfur-rich hydrothermal solution.As the migration of gold contained in the hydrothermal fluids to the fault,the changes of the pressure,temperature and pH led to the enrichment of ore.
We introduce the study and application of panel mining method in Sanshandao gold mine.Through onsite production test,compared with point pillar mining,the dilution rate and loss rate decreased 3.52% and 22.1%, we obtain good economic efficiency. The experience and results are worth reference for similar condition mine.
According to the characteristics of big coefficient of variation of orebody thickness in Xinhui gold mine, combine with the actual geological occurrence conditions of ore block,we choose level stratification sub-sequent filling mining method and stope mining,and exploit ore block.We obtain good results,and it has value of increase promotion.
Though discussing the application of 2DPZ-15 scrapper in the construction technology of inclined shaft driving up the mountain,we summarize the construction characteristics and consideration of 2DPZ-15 scrapper during introduce into shaft driving.The construction can accelerate the speed of shaft construction,reduce labor intensity,improve the process of inclined shaft construction,at the same time,it provide reference for other project of metal mines.
Based on the engineering geological and mining conditions of Wangershan gold mine,numerical simulation method was applied in the study of mining-induced subsidence.By comparing the calculated results getting from the computational model,the regularities of the disturbed stress and displacement fields of rock body were put forward.Moreover,the features of ground subsidence and abrupt collapse were analyzed.Finally,it suggested that filling the mining goaf is a necessary measure in future mining.
In order to meet the requirement of 6 000 t/d out-mining capacity in Jiaojia gold mine,Sizhuang workshop actively carry out the research and practice to expand production capacity,through optimization of the original system, establishment of new system,we improve the level of mechanization.Using one year time,the out-mining capacity of Sizhuang workshop increase from 200 t/d to 800 t/d.The production capacity has been greatly improved,and it laid foundation for later expanding production capacity.
The arsenic and antimony contents in the samples from Jinlongshan and Zhaishang fine-disseminated refractory gold deposit in Qinling area are high.Atomic fluorescence spectrometry （AFS）is a common method used for determination the contents of arsenic and antimony.However,several problems arise in the conventional AFS analysis, such as dual-channel interference,fluorescence saturation,fluorescence quenching and so on,which make it difficult to obtain accurate results.According to repeated comparison and analysis,we have developed several methods for determination of high-antimony low-arsenic,high-arsenic low-antimony,organic compound contained samples by atomic fluorescence spectrometry,and the results are accuracy and reliability.Our approach is to:the process of determination As,Sb at the same time,the same samples when the arsenic is less than 10 μg/L and antimony values greater than 50 μg/L,we should use single-channel measurement,when the antimony value is less than 1 μg/L,the arsenic values greater than 200 μg/L,we should use single-channel measurement,exists in the samples with higher levels of fluorescence quenching,it should be with diluted solution.AFS-830 atomic fluorescence spectrometer for the automatic injection device,the low concentration samples can be autosampler general,high levels of manual injection sample to ensure that monitor each sample.In order to facilitate high levels of antimony,antimony preferable to the highest point of 50 μg/L,but the arsenic concentration of 200 μg/L,arsenic exceeded the linear range of the time,after determination of standard curve,we overtake the points of 200 μg/L.
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