According to the remote sensing image of Wudang area，taking geographic information system as technology platform combined with the remote sensing image enhancement technology to study regional structure，then the large and medium-sized fracture was deciphered.Meanwhile，the fold was deciphered based on the Radial Basis Function （RBF） neural network pattern recognition combined with the binary wavelet transform visual，and we employed the Haar wavelet transform method to further interpret the ductile-brittle shear structure.Additionally，using the machine to help processing method for multiple fault information after indo-chinese epoch to decipher，it was found that the structural features of the Wudang area were intuitively described.Through investigations of the quantitative analysis of interpretation structure，the results displayed the general tectonic framework of the Wudang area and development status，moreover，it can further verify the understanding into the accuracy of the result combined with field geological investigation and comparison.Therefore，the work in this paper has a certain guiding role and it can provide basic data for further study on geological survey and tectonic ore-controlling.
This study adopted the time domain induced polarization method.On the base of IP measurement in gradient array in Zhongzhuche gold field，Eastern Shandong Province，we evaluated IP anomalies by the IP sounding method in anomalous areas.The position and depth of mines could be estimated by exploration results.We discussed the prospecting effect of the time domain induced polarization method in gold field.After IP measurement in gradient array，based on the apparent charge ability and apparent resistivity contour maps，six high charge ability anomalous areas are discovered.Combining geological survey results，four anomalous areas are selected for vertical IP sounding.Based on the analyzing and interpreting results of IP anomalies and geological condition， the charge ability and resistivity sections are obtained.The positions of potential ore （mineralization） bodies are delineated.By surface and drilling engineering，good prospecting effect has been achieved.The sounding results offered scientific bases for the next surface and drilling works.
Dishuishan gold deposit，related to ductile-brittle shear zone of altered rock-host，is primarily occurred in littoral facies-neritic phase acidic volcanic clastic rock.On the basis of field geological work，the paper analyzes the trace elements of the samples of the drill hole in different geologic section，which located in Au2 orebody，with using geological and mathematical analysis methods，the paper carries through the analysis on the spatial distribution characteristics，the primary halo feature and the elemental association characterisitics of trace elements.The results showed that：On the basis of Grigoryan’s zonation indexes，the primary halo axial zoning sequence from the top to the deep part in No.141 and 175 geologic section are（Pb-As）-Au-Cu-Zn-Bi-Hg-Sb-Ag-Mo and（Hg-As-Au-Sb-Pb-Cu）-Zn-Mo-Ag-Bi respectively，which exists the mutual superposition of the front halo elements，proximal elements and tail halo elements；The correlation analysis，cluster analysis and factor analysis reveal that Au is closely related to Ag，and followed by the As，Sb in Au2 orebody，and determine the F1 main factors of Au in the Au2 orebody is Sb-As-Ag-Cu-Au-（Pb-Zn），which is the most favorable combination of elements for mineralization.According to the space distribution characteristics of each element，we consider that the mineralization is prospective in the deep portion of the Au2 orebody.
Through analysis from outcrop to microscopic scales，and quartz c-axis fabrics，we consider the Neoproterozoic rocks in the Huogeqi ore field experienced multi-phase deformation and metamorphism.Two phases of deformation contribute to the different structural characteristics in northern，central and southern belts.The first phase of deformation is characterized by NW-SE shearing at deformation temperature at about 600 ℃.The second phase of deformation is evidenced by NE-SW shearing at ralatively low temperatures.Microscopic features of the deformed sulfides indicate that the orebodies were transformed by the multi-phase deformation.Enrichment and depletion of the orebody may result from the physical remobilization caused by the shearing.
The North Qilian metallogenic belt in Qinghai Province is an important copper，lead，zinc，gold and iron polymetallic metallogenic belt with various deposit types，complex geological features and some prospecting potential. However，due to the large area of the entire North Qilian area and too much mappable unit involved，a large number of obtained basic geochemical data is without systematic analysis.While，the traditional geochemical mapping methods can not completely reflect the true degree of abnormality，and it can affects the prospecting effect，which greatly restrict the further prospecting and optimization of exploration reserve base.Based on the issues mentioned above，the abnormal contrast method is employed for geochemical data processing into map in the North Qilian area of Qinghai Province. Additionally，the processed data is compared validation with existing deposits and the true value of the raw data.The actual results are quite satisfactory and we have overcomed the difficulties of conventional geochemical mapping，which can provide a reference for post-processing of large regional geochemical data.
Mawu gold deposit located in eastern part of Min-Li gold metallogenic belt，approximately 5~7 km away from the Zhongchuan rock，is a medium-sized micro-disseminated gold deposit found in recently years.In this study，through analyzing and systemizing great amount of raw materials obtained during the process of geological exploration，we summarized the deposit geology，physical and chemical characteristics as well.The main orebodies occurred in limestone and phyllite of Hejiadian Group at Devonian with the NWW trending，and the secondary fracture with the NWW trending was the main ore-controlling factors.Meanwhile，the hydrothermal alteration presented primarily for the pyritization，sericitization，silicification and carbonatization.Output of the ore was mainly influenced by three factors，lithology，structure and magmatic rock.Compared with wall rock，it displayed high polarization characteristics of low resistance.Combination feature of the Au element mainly exhibited appearance of Au，As and Sb.On this basis，the seven and eight vein in northern mine were believed to be a large potential in terms of body extended or extension after analysis.Additionally，there was parallel vein body （blind ore body） located at upper and lower plate of the known veins，which demonstrated that better mining ore prospects in northern part of the mine.
The SiO2 average mass fraction of volcanic rock of Manitu For mation at Bowule Mountain of the Da Hinggan Mountain was around 59.93% belonging to intermediate rock with peraluminous and alkali-rich.Whilst，it was found that the volcanic rock exhibited the characteristics of high calcium alkaline potassium and calcium neutral alkaline volcanic rocks series.The content of rare earth elements was higher （∑REE=（144.06~212.88）×10-6），and light and heavy rare earth fractionation was remarkable with fractionation factor （La/Yb） N ranging from 10.49 to 13.47.Moreover，enrichment of large ion lithophile elements was K，La，Ce，Rb， Ba，LREE，and loss of high field strength elements was Ta，Nb and Ti.Generally，the volcanic rock sample primarily came from the mantle source region controlled by subduction fluid，and the volcanic activity was related to the Paleo-Asian Ocean or Mongolia-Okhotsk oceanic subduction.In the study region，characters of geology，geophysics，geochemistry as well as remote sensing were significant anomaly，therefore，two mineralization favorable location were predicted after comprehensive investigation，and the target region had the potential of magmatic hydrothermal type polymetallic deposit.
The aeromagnetic information at the Luowei mine，the ground high-precision magnetic survey，observed results using EH4 magnetotelluric sounding method as well as abnormal site were addressed in this article.Moreover，we made the inference and prediction for geological issues together with mineral characteristics，and all the results nearly exhibited the same direction.The results of geophysical exploration in recent exploration prospecting works won the validation of drilling engineering，and the bismuth and tungsten orebodies with pyrrhotite sphalerite were revealed at the tagged magnetic anomaly sites，suggesting its well indication for deep prospecting. In addition，our conclusions were same with the results about magnetic concealed rock mass and its depth applying aeromagnetic survey 30 years ago.Finally，according to ore-forming mechanism and metallogenetic model based on geophysical exploration results，the prospecting direction and prospecting potential were discussed.
The study region is located at the Baiyinjirigala-Arsala area in Inner Mongolia autonomous region，based on the ETM date primary combined with remote sensing technique，the regional main line and ring structure were interpreted by the image difference，and then spectrum characteristics of the alteration mineral were analyzed as well.Meanwhile，through the determined mathematical model by abnormal lower limit value，the remote sensing alteration anomaly information was extracted quantitatively employing principal component analysis and ratio method.Comprehensive analysis of spatial correlation between geology，geophysical prospecting，chemical prospecting and remote sensing alteration anomaly information for further detecting abnormity is vital importance for improving the effectiveness of early geological reconnaissance，geological prospecting and science research in the study area.What’s more，it is expected this analysis method can serve as guiding function for remote sensing technology in regional investigations.
With the restriction of complex geological conditions and because of the high technical level of natural caving mining method，a lot of preliminary work on mining theory study and technology research has to be carried out before actual natural caving mining operations.In order to realize the scientific and effective application of natural caving mining technology，various functional advantages of numerical analyzing software have been fully exploited in this paper.Taken the actual application of natural caving mining method in Xuejiping copper mine as an example，with the help of the superior modeling function of MIDAS，the complex mechanical calculation model has been established.Meanwhile，by using the coupling technology of MIDAS and FLAC3D，the conversion of numerical calculation model from MIDAS to FLAC3D has been realized.The caving area for natural caving mining has been simulated and calculated in FLAC3D.By using the particle flow discrete element method in PFC2D software，ore drawing process has been simulated，and then the rationality of poly-draw-points drawing method and the suitable drawing intervals have been analyzed.Therefore，by the joint application of numerical analysis software，numerical calculation in natural caving mining and the simulation of drawing process have been realized. It is of great guiding importance in actual application of natural caving mining technology.
Based on the main influenced factors of unclassified tailings cementing filling technology of Liangshan Iron Mine，the designing and regression analysising of different proportional parameters of filling are presented in this paper，and gain the curve of main factors and strength influencing the strength of filling body.According to stope parameters，the design strength range of backfill is 0.18~1.30 MPa by using different mathematical models.The simulation analysis of deformation conditions of backfill in adjacent stope has been done with ABAQUS software after stope mining.The results show that when the ratio of backfill stope is 1∶8 the backfill strength is a little earning，the ratio of backfill stope is 1∶20 the backfill strength is not enough and the backfill may be fracturing damaged，the backfill strength can meet the requirements of stope safety when the ratio is 1∶15 and concentration is 70%，which can control the deformation and failure of stope.
In order to making dynamic analysis of“six systems” in underground mine，the evaluation system of “six systems” was established，and 31 evaluation indexes were put forward from the monitoring and supervision system，personnel position system，urgent danger prevention system，forced draught self-rescue system，water supply system and communication system six aspects.Analytic hierarchy process（AHP） and matter-element analysis were used to determine the index weight of synthesis.With the unascertained measure theory as assessment tool，the comprehensive evaluation model of “six systems” in underground mine was constructed.This system was applied to making comprehensive evaluation of risks involved with a certain“six systems” in underground mine.The results show that the comprehensive evaluation model realized ordered segmentation of evaluation space，the results can conform to the experts thought，and the model is operable in practice.
The analysis results of ore chemical composition at a certain refractory gold demonstrated that the gold grade was around 3.51×10-6，content of SiO2 was as high as 71.88%，harmful element was mainly with the presentation of organic carbon and sulfur.In addition，the content of organic of carbon even reached up to 2.51%，which hampered the following leaching procedure seriously.After analyzing the XRD and phase of gold，it was found that the ore main minerals were primary composed with quartz，calcite and sulfide ore，while sulfide ore was given priority to with pyrite.According to the characters of refractory gold ore，when employing the cyanide reagent TL to leaching directly，low leaching rate can be obtained.Therefore，we used microwave method for pretreatment with grinding and leaching simultaneously without cyaniding，and paid attention to the microwave roasting time，microwave roasting temperature，the amount of leaching agent TL，liquid-solid ratio，and the impact of mill leaching time on the gold leaching rate.The results showed under the conditions that microwave roasting temperature at 650 ℃，and microwave baking time of 45 min，the gold leaching rate of 71.64% was achieved when a non-cyanide leaching dosage was 6 kg/t，liquid to solid ratio was about 4∶1，and grinding time was 6 h.
The C923 was employed to leach arsenic and bismuth in copper electrolyte with the purpose to observed influence of the extractant concentration, acidity，leaching time and phase ratio on the extraction rate to arsenic，moreover，the effect of chloride ion concentration on extracting bismuth was discussed as well.The results demonstrated that single-stage extraction rate of arsenic was approximately 68.41% in optimal conditions，and three cross-flow counter-current extraction rate was around 97.00%.However，when chloride ion concentration reached to 0.86 g/L，extraction rate of bismuth was about 95.15%.During the time when applying two cross-flow water with load phase to anti-extract arsenic，the total anti-extraction rate was 88.20%，nonetheless，using mixed solution of tartaric acid-sodium hydroxide to anti-extract bismuth，the result of anti-extraction rate was around 81.49%.
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