By analyzing the regional metallogenic background of Qiyugou gold deposit and the geological characteristics of crypto-explosive breccias type golddeposits，combining with the latest research results and prospecting effect of structural superimposed halos，we predict the prospecting potential of crypto-explosive breccias type gold ore in the deeps and pointed out the prospecting direction.
Briefly introduce the crypto-explosion breccia body from Qiyugou and the geological characteristics of gold deposit.Based on the statistic of sample probability，in connection with different deposit industrial index，we analyze the status of resource utilization of the mining area and the condition of low-grade resource utilization，we confirmed a new analysis method of technical and economical evaluation for the gold deposit in this mining area， and preliminarily evaluate the comprehensive utilization of the mineral resources.
Zhaishang gold deposit is a recently discovered large Carlin-type disseminated gold deposit，which is located in the western part of the Min-Li metallogenetic belt，wetern Qinling Mountains.Two main types of ore formation，namely，oxidized ore and primary ore，are recorded in gold ores.According to the differences of ore-host rocks，six types of primary ore formations can be distinguished：cataclasite，cataclastic carbonaceous slate，cataclastic silty slate，cataclastic carbonates，calcareous slate，and intense alternation breccia.Based on the characteristics of the primary ores，mineral assemblages in the gold ores can be divided into four types:assemblages I，represented by the association of minor sulfide-quartz，assemblages II，represented by the association arsenic-bearing pyrite- arsenopyrite-quartz，assemblages III，represented by the common association of polymetallic sulfide-quartz- scheelite -calcite，and assemblages IV，represented by the association minor sulfide-telluride-carbonate such as coloradoite，melonite，calcite，ankerrite，siderite.On the metallogenic process，deep origin (magmatic and/or metamorphic) hypothermal fluids may take a more important role in gold activation，though structural transition leads to gold and sulfides separate out from ore-forming by changing the conditions of the primary well-evolved fluids.The genesis belong to low and middle hydrothermal deposit.
Anhui Province lies in juncture place of three classⅠtectonic units as North China plate，Yangtze plate and Dabie orogenic belt.It has long history of movement，complicated and variety geologic process，and great differences between different regions of metallization.Basing on different geotectonic setting，divided the gold metallogic regions of inner Anhui province into four metallogenicbelts，such as Bengbu of north Anhui，Dabieshan，middle and lower Yangtze River and east section of Jiangnan ancient land.It expounds geologic setting of mineralization and main type of ore deposits in metallogenic regions，separately.According to geological characteristics of mineralization，geochemical anomaly of stream sediment in each gold metallogic region，combining with placer information, using GIS system，circled sixteen prospecting prospective areas in different class，among which seven in Class A, five in Class B and four in Class C.
Jinshan and Maquan gold deposits are located in Lixian-Baiyun-Shanyang deep fault between swollen west section and branch acute angle clamp area. According to the comparative study of regional geological setting,geological characteristics and metallogenic genesis,we think that it have similar geological characteristics and deposit genesis.Jinshan,Maquan gold resources is likely to come from the Carboniferous;sulfur come from depth,it may be caused by magmatic water;ore-forming hydrothermal water come from mixture of atmospheric precipitation and magmatic water, metamorphic water;deposits are micro-disseminated hydrothermal gold deposit formed in conditions of low-temperature,weak acid,weak oxidation-reduction medium,weak mineralization.It is thought that the two deposits should be one,and it require overall consideration for future geological survey(especially the joint of two deposits),and expand the current deposit scale.
Based on geological conditions of No.ⅠCu-Pb-Zn-Ag deposit survey area in Baiyin, Gansu Province, we used the geo-electrochemical extraction method, the soil absorption Hg measurement,the ion conductivity of soil measurement , the transient electromagnetic method and other methods to search deep hidden deposits. According to comprehensive analysis of the geophysical and geochemical anomalies, combined with the geological characteristics of the study area，the paper shows that the potential of mineral deposits is assured in this area, we found four deep ore-prospecting target, recommend three prospecting target site(i.e.,2-Ⅲ、10-Ⅰand 10-Ⅱ) which range from 300~600 m should be verified firstly, according to the findings, we know that the application of such geophysical and geochemical methods to search for concealed ore bodies in this area are available, and they should be used widely.
In the semi-arid desert and grassland landscape area in Inner Mongolia，geochemical debris survey sampling tests show that the thick grain size(-5～+40 mesh) of weathering debris samples from B layer of soil can effectively remove the interference of eolian sand，and it also can stand out the geochemical anomalous characteristics of mineralization and indicating elements.Take the dicover of Baiyinchagan Ag(Au) polymetallic ore deposit for example，we analyze the methods，technologies of geochemical debris survey and its exploration application.it is demonstrated that geochemical debris exploration method is a good prospecting method，as it can quickly，accurately enclose the range of the mineralization alteration zone，and improving the prospecting effect.
1017 silver-lead polymetallic ore deposit lies in the intersection part between the southern part of Derbugan metallogentic belt and the southwest part of Dongwuqi-Lizishan metallogentic belt,and it is controlled by folds and ductile shear zone. The spatial distribution regularities of ore-bodies and further ore-prospecting zone are discussed by ore-controlling structures.
Luoping Au-Ag-Cu deposit is located in the eastern Qinling orogenic belt，which is a ductile shear zone-type gold deposit.Tectonic line of the area is generally distributed in the east-west direction.Hetaoyuan fault is the secondary fracture of the Shangdan fault and runs through the middle of the area.Based on the regional ductile shear zone，it evolved into brittle fracture.The fracture zone which is the boundary of the northern Lower Proterozoic and the southern Devonian stratums controls the distribution of stratums.There exist magmatic intrusive events in the area where structures are well developed and metallogenic conditions are advantageous.Through a comprehensive analysis for regional metallogenic background，geological features，geochemical characteristics，mineralization-alteration of Luoping gold deposit in Shangzhou，we predict the prospecting potential，and thus infer the area has good prospecting foreground.
Xiekeng gold-copper mine is locate in the north contact zone of Gangcha rock body,rock host in the contact zone of marble,sand slate and medium acidity rock body that belong to Daguanshan Group upper petrofabric of Permian.There are three contain mineral segments,NW trending fault and NE trending secondary fault are the main fault that control rocks and minerals,but NE trending main fault is the main ore-transmitting structure.Through research geological characteristics,we initially think the deposit is a skarns,hydrothermal and tectonic altered rock type composite gold-copper mine.
The achievement data of geology,structure,geophysical and geochemical exploration in Aalake Lake-Hongshuichuan zone illustrate that this area has a good metallogenic background to explore copper(cobalt)-gold deposit.and it is an important mineralization belt of East Kunlun zone.The chief minerals of south structural belt of northern East Kunlun is Cu、Co、Au,secondly is Pb、Zn、W.The types of deposit are volcanic exhalation-sedimentary SEDEX and VHMS types Cu-Au-Co mine related with subsiliceous-medium basic volcanic rocks of Variscan epoch,skarn type,hydrothermal vein type precious metals and polymetallic ore and superposed-reworking type deposits related with medium acidity invade rock.The central part should pay attention to the deluvial and alluvial type of modern placer type alluvial gold and the gypsum-salt deposit.The chief minerals of south part is a Cu、Co、Au,secondly is a Ni、Fe、Cr，the types of ore deposits are massive sulfide type copper-cobalt,and copper-gold ores hosted in Buqinshan Group related with marine facies subsiliceous-medium basic volcanic rocks of Variscan epoch,accompanied with nickel minerals of mafic-ulttramafic magma liquation type with basic-ultrabasic rocks intrusion and crystallized differentiation type chrome iron ore.
Through application of geoelectric and chemical extraction method in test profile of dayinggezhuang gold mine,and correspondence analysis between samples and element variable, the anomaly of the ore-forming elements is filtered,we consider that the anomaly of main ore-forming elements can effectively indicate hosting location of deep-concealed orebody and its deepening,and it has more effective than general geochemical exploration methods in directing deep-concealed orebody.
Shanhou-Beipo mining area is located in the middle and south Zhaoyuan-Pingdu Fault Zone.Because of the multi-stages tectonic stress action，the deformation characteristics of the rock in the area is obvious and micro-structure well develops.The ductile and brittle micro-structure are comparatively developed in the fracture zone. With comparing the micro-structural characteristics with the other in different tectonic levels of earth’s crust，we can make sure that the tectonic level of this mining area is in the upper part of the rock，the rock deformation have undergone a process of ductile deformation-ductile-brittle deformation-brittle deformation，it is close to the formation of gold mineralization.
Gongguoyalong is located in the western segment of Bayankela Mountain,the tectonic position is located in Kekexili-southern Bayankela Mountain orogenic belt during Late Indosinian.Metallogenic province belongs to Bayankela Mountain Indo-Yanshan gold and antimony mineralization belt at the multi-phase construction of the intersection,composite parts. In order to further understand the ore-forming geological background of the area,we roughly identify ore-controlling factors,metallogenic regularities.Through using geological, geochemical and surface exploration work carry out verification and recourse to narrow prospecting target areas.Now we have delineated four Au,Sb soil anomaly showed better and found a better gold thread,we think this area has a better vision of the gold mineralization.
The gold particle size of Nancha gold ore is fine and it is wrapped by sulfide minerals,it has a close relationship with arsenic,the flotation recovery is high,the gold leaching rate of arsenic-bearing gold concentrate canide is only 30%,and it is difficult to recovery use.Using bacterial oxidation-cyanide gold extraction process and continuous expansion experimental research,the gold leaching rate reach 97.00%,the indicator is more ideal,and we better resolve the refractory problem of arsenic-bearing gold concentrate.
It can bring great convenience to use holding GPS for working in geological.By introducing the difference of WGS-84 from BJ-54 Coordinate System，Xian-80 Coordinate System，2000 Native Geodetic System.Introduces，and the relation of one with another.GPS parameters are not same in vary zone when using BJ-54 System.Through the examples to explain how to calculate and set parameters，how to correct parameters cross belt and how to transform between 3°belt coordinate with 6°belt coordinate each other，how to position slot and to survey geological chemistry section by using GPS.Finally，notice the points for attention during using holding GPS.
Sanshandao gold mine is one of the oversize under-ground gold mines and the mine with the highest mechanization equipment in our country.The original design of Xinli mining area adopted panel cut-and-fill mining method.Because it has more cracked gold ores in the upward lane and huge difficulty for exploring，besides it caused high ore depletion loss ratio.So we designed the unique combined mining method of upward lane and downward horizontal delamination.The test result shows that the combined mining method is an advanced technique,safe and reliable，and also has high economic applicability.So it can be referenced by other mines who has similar geological conditions.
According to the mining technology condition of the district of Jiaojia gold mine in the middle of the mining residues，combining with the specific production situation and conditions of the mine，we have carried out a reasonable and orderly planning，arranged development and geological exploration so as to increase the resource reserve.By strengthening the construction management，adopting from below to above slice drift method and systematical remining the room pillar and mining pillar on end，we can recycle the resource adequately.
甘公网安备 62010202000672号