Rare-earth elem ents(REE) of Shuiyindong, Laowanchang and Baozidong gold deposits related to the Sbt show that contents of light REE are much higher than ones of heavy REE and REE curve slants to the right.These may indicate the sane source of metallogenetic elements in these gold deposits. Preliminary researches indicate that gold deposits of southwestern Guizhou Province in China are products of regional mineralization, the metallogenetic elements are mainly from depth and the Stb in the region is basis for prospecting blind deposits. More gold deposit will be found in southwestern Guizhou, through further studies.
Fuxingcun gold deposit is located in the Baishan-Laoling metallogenic belt, it mainly occurs in the dolomite marble of proterozoic Laoling group Zhenzhumen formation, the ore-body is controlled by NNE、NW fractured shatter zones. According to the shape, occurrence, size and grade of the orebody, ore types,mineral association and fabric, division of the mineralization periods and stages,wall rock alteration, temperature and epoch of metallogenic, We discuss the geological features of Fuxingcun gold deposit. The main ore-controlling factors are stratum, fracture structures and magma activites, and the fracture structures is the most important ore-controlling factor. Based on the analysis of S isotopes and the study of mineralization temperature and epoch, it is found that the metallogenic elements are from stratum and magmatic rock, the temperature of mineralization is meso-epithermal, the mineralization time is Yanshan epoch. It is a meso-epithermal fractured shatter zones altered rock type gold deposit of Yanshan epoch. At the same time, the paper has summed up the main prospecting ctiteria, it will provide help for seaching this type gold deposit in this area.
Liaoxi sag as a limited study area, choosing three large-scale gold deposits (Baizhangzi,Jinchanggouliang,Paishan lou) as the research objects, we found that structure-magmatic hydrothermal can explain the ore-forming process and mechan ism of this kind of gold deposits. There are two conditions to form this kind of deposits: the first one is large mineralization spatial domain in local m inera lization ( w idely deve loped source bed / rock, large-scale structure and act ivation, large local geophysica l and geochem ical field); the second one is d ifferent kinds of ore-forming conditions ( different kinds of sources, several ore-forming activities, over prints and alterations in different ages).This paper build the prospecting model of area and ore deposit and body synthesized information of large-scale gold deposit in Liaoxi sag, by synthesizing the conditions which are mentioned above, and the information from geophysical prospecting, geochemical exploration, remote sensing, mineralogical, etc. It summarized that the main areas of prospecting of general large-scale gold deposit should exist in the triangle area formed by two deep-large faults ( Jinxi-Fuxin fault and Yaolugou-Jinxi fault), by synthesizing the characteristics o f structural location, magmatic activity,alteration zonation of deposit productive area.
In 2005, Qinghai Nonferrous Mining Exploration Institute took the project: comprehensive investigation of 1/50 000 stream sediment and mineral geology in Gouli area. During the geochemical survey of 1/50 000 stream sediment, 51 points with in composite anomaly were fingered out, and geochemical maps with in 15 kinds of elements including gold and copper were established. On this basis, we compiled combination anomaly maps and comprehensive anomaly maps about these elements as thema in research objects. It was primarily discovered that enriching and discrete characteristics of elements, distribution law and assemblage characteristics of elements in the researching area,which gives a directing role to the research of prospecting conditions and prospecting laws in this area.
Through analyzing the data and process of initial geological logging of trenching,we put forword the E-R data model of digital geological logging of trench prospecting. Basing on relational database, GIS, graphic images, software programming technology and so on, we put forword the main methods and steps such as inter-data-inputting,view-map-logging,integrate-map-logging, data-map-logging, which could be used to realize digital geological logging of trenching. The rational data model is the foundation of professional software development and data application, and the rational realization method is the vital factor that could ensure the agility and applicability of professional software.
Daxin gold deposit is located on the edge of border zone of southern China geosyncline fold system and Yangtze para-platform and in the middle of Hunan lithosphere ancient subduction belt.The mining area altogether discover 14 m ineral veins, select 10 gold ore body. The gold tax saves the condition to be possible to divide into three kinds approximately, the main tax saves in the sulfide, few by adsorptions and so on limonite, organic carbon. The ore deposit formation and the depth portionmagmatic activity has the close relationship, for contains the ore to be mad the water hydrothermal the gold ore deposit which forms a long the fault stave backfill confession, mineralizes for the low temperature hydrothermal,has the time stage mineralization characteristic. Ore body strictly fault control, its ore type mainly for stave alteration crag ore. The mining area inside and outside prospecting prospect is good.
Xilaokou ore area is located in the northern edge of Jiao-Lai basin. The strata appeared in this area are Jinshan groups of early Proterozoic and Laiyang groups of Mesozoic. Magma rock is mainly formed in Yanshan period.The structures which have close relation with gold m ineralization are complex, and surface alteration can be found every where. It makes the prospecting work difficult.Through summarizing the geological features and ore-forming regularities, we put the prospect ing thinking in good order, and further prospecting direction is analyzed.
Hongshuihe iron ore in Dulan county is located in Langyashan qroup of Ji county period, it is a set of shallow metamorphic strata formed by magnesian carbonate rock, constitution of carbonate rock and some fine grained clastic. There are more magma, and the magmatism has the characteristics of many activities, this has given an extremely favorable condition for the formation of various types of deposits. The faults and folds construction have great development. The fault have been mainly impacted by the Northen kunlun deep and great faults in north and the mid kunlun fault in south, the main faults show NW-NWW or nearly ES strike multiple fratures parallel arrangement and mainly reverse faults, they control the distribution of layer direction and magma, and also be the regional ore-controlling structure. NE-NNE strike are the secondary faults, they have damage effects for ore body. The genetic type of deposit is the sedimentary metamorphic iron deposit.
We introduce the geological and rock mass characteristics of Hulu copper nickel polymetallic ore deposit,and point out the Hulu rock mass has controlled formation and distribution of copper-nickel deposit. We summarize the result which is corresponding to high magnetic anomalies, high polarizability anomalies, low resistivity anomalies and high content element anomalies in basic2ultrabasic intrusion, combined with many years work experience, is an important indicative characteristics of seeking polymetallic sulfide minerals, simultaneously establish the p rospecting model of physical and geochemical exploration in this area, and exp lore new ways for furtherworking in the region.
Moquesang’ang located in the central of Co、Au、Cu and jademe tallogenetic belt at late-Paleozoic Period of Xueshanfeng-Buerhanbuda area. The integrated anomaly intensity of geophysical and geochemical is high, widely distributed, obviously concentrated center and this area has a better prospecting. Comprehensive the achievements of geological,geophysical and geochemical, we consider the cuff and injection position of IP anomaly, geochemical anomaly and NWW trending fault zone is prospecting area.
The eastern section of the east ore belt is the largest gold deposit in Laozuoshan gold deposit region. The ore body is controlled by the NW-trending fractured faults belt. The gold ore body is controlled by the compression and compression-torsion shear brittle and brittle-ductile fault. The ore body exists in tectonic breccia and skarn. It arranges as steep tilt parallel vein, layer and lens shaped. The extension is greater than the extension. The types of orebodies are mainly disseminated. Gold ore bodies exist closely together with arsenopyrite and pyrrhotite. The depth of the ore body is more than 11 km. It is a typical middle or deep orogenic gold deposit. There should be a lot of deep exploration potential without considering the late-forming factors such as erosion. At p resent, the depth of IP sounding is less than 300 m, and drilling depth reaches 500 m. The main ore body doesn’t appear continuously. The ore body controlling faults and skarn zone still tend to descend. The lower part may be the second orebody forming space.
During the construct ion of western airshaft at Xinli mine area of Sanshandao gold mine, through them easures of open ingmore salt pumps, increasing the circulation velocity of saline, increasing the number of freeze-hole and reducing the frozen-hole pitch, increasing the concentration of salt water and make its temperature down to a critical point,successfully passed the quaternary gravel-rich brine layer. It provides valuable experience for the projects of similar engineering geological and hydro-geological conditions, and worthy of reference for similar mine.
With prepare the gold standard solution for example, various factors importing uncertainty for the preparation
of the gold storable standard solution (primary solution) and dilution of the gold workable standard solution are discussed.Its uncertainties in measurement of each concentration are evaluated, the attentive questions in prepare the gold standard solution are pointed.
Based on the principle of cyanidation extract gold,we comprehensive analysis of gold piled in the ore, and collection the practical experience of extracting gold. We discuss the principle of gold dissolving in cyanidation extract gold, the impact of imputities on gold dissolving, as well as the stability of cyanide solution and the treatment of cyanide waste water, and so on some of questions. We can use 99. 9 percent of the gold as raw materials, and it is dissolved by aqua regia, use ether as extraction, oxalic acid as reducing agent,we can gain 99. 999 percent of pure gold.We test the impurities for purity gold, and technical indicators reach to the requirements of high2purity reagents. The purpose of thismethod is cooperate with the needs of extracted gold, in order to improve effectiveness and cost-effective.
This article introduces the gold extraction process with CIP of Hetai gold deposit,and the field practice of dealing w ith the original ore using CIP. In contrast with the original metallurgical process indexes, from which we summarize some reasonable technical schemes and management methods to improve the metal recovery rate, and create some economic benefits for the enterprise.
In strong acid medium, the dynamic activated carbon adsorption column device separate deposition, rich gold,with 1% sulfur thiourea-hydrochloric acid solution to extrication, ascorbic acid as matrix modifier, graphite furnace atomic absorption spectrometry determination of the gold. This method has wide linear range (02100ngmE) , low detection limit (0.16×10-9) , accuracy (RE < 12% ) and precision (RSD < 25% ) are good, and it suits to gold determination of batch of geochemical samples.
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