| Phatem gold deposit is located in the capital of Laos Luang Prabang North East 30 ° and 30km Pa Ben Village,Hui Wo Township of Bau County.The tectonic position Luang Prabang arc fault at Dien Bien Phu-Luang Prabang plate suture line side o-f thebelt,NE trending regional faults throughout the region,belonging to the Langpraban-Li Fu(Thailand)take part in the fold.Along with the Variscan,IndoChinese epoch,Himalaya period granite and intermediate acid intrusive rocks,is one of the mos-t important skarn type,porphyry type and cataclastic rock type,hydrothermal polymertallic mineralization concentration area,metallogenic envi-ronment conditions.Based on the study of the metallogenic geological background phatem gold,base-d on analysis of geological information,through the study of phatem gold area of typical deposits(points)of the ore-forming geological conditions,models to predict the 1-ocation to establish phate-m metallogenic model of gold deposit,comprehensive info-rmation prospecting model and phatem gold area resources,and ultimately complete quantitative prediction of phatem gold area resources.The completion of the above work at the same time,this research has made the following main research results:(1)Based on the regional geological background,the characteristics of gold ore formation,the Au deposit in study area phatem gold deposits(points)and basic phatem geological characteristics of gold deposit area,it causes phatem gold deposits in the area should belong to magmatic hydrothermal type gold deposits related to Mesozoic M-agmatic Activity.(2)By analyzing the characteristics of the study area,the relationship between gold mineralization and geochemical statistical parameters of 11 kinds of elements close that:the average content of Au element value is much higher than the northern margin of the North China Craton background value,but it has the dual characteristics of strong dispersionand strong enrichment,these features also makes the distribution of gold element is unbalanced,with characteristics of high background of gold element in the local area,provides sufficient material basis for gold mineralization;through cluster analysis,factor analysis and other multivariate statistical methods to analyze the relationship between the 11 kinds of chemical elements,combined with the study of typical deposits(points)in the region of abnormal combination characteristic,obtains phatem area the gold deposits(points)typical abnormal structure combined elements:Au-Hg-As.(3)Application of characteristic analysis,theory of quantification IV,corresponding analysis and other multivariate statistical analysis methods,in the circle of the 42 Au geochemical anomalies in the selected 23 anomalies,and its classification,classificati-on results:a abnormal 5,B was abnormal in 7,grade C in 6,D exception 5,whereina abnormal connection degree more than 0.7,the highest probability of mineralizationn.(4)Phatem gold area according to the typical ore deposits(points)research and understanding of regional gold mineralization,summed up the metallogenic model of gold phatem area,establish phatem gold prospecting model of comprehensive informationn area.(5)This study applied element method for geological body to divide the statistical un-it,division principles:① has selected phatem regional Au geochemical anomalies and phatem area within the known gold deposits(points)the location determining statistial unit position;②boundary as the study area catchment basing eological statistics as a minimum unit boundary,received a total of 65 statisticalunit,where in the ore bearing unit 23.(6)Using the method of multivariate statistical analysis to establish phatem gold area location prediction model,predict all statistical unit in the study area.The positioning prediction were selected including ore unit 61 metallogenic probability larger effective prediction units,according to unit of metallogenic favour ability degree size will be divided into A,B,C,D four levels,wherein,a unit 6,unit B class 18,C class unit 27,D unit 10.(7)Prediction method using logic information method and ore bearing geological body volume parameter method two quantitative,the mineralization in the location prediction level in C(including C)above the unit for quantitative prediction.The results show that,in the study area,gold mineral resources prediction of total 35295.88kg using the logical information method,additional resources for 13534.22kg;prediction in the study area,the total mineral resources used for 31834.1kg gold ore bearing geological body volume parameter method,new metal quantity 10072.44kg.(8)According to the results of quantitative prediction of logic information method and ore bearing geological body volume parameter method two kinds of quantitative prediction methods that,making prediction unit classification principle,and based on the classification principles will predict unit is divided into 1 level,2 level and 3 level the three level.Determination of gold metallogenic province division and the principles of lassification,based on the principle of Ⅰ,Ⅱ,Ⅲ summarizes three level phatem area gold metallogenic province,prospective division results:gold metallogenic stage Ⅰ far scenic area of 2,predict total resources of about 20.7t;gold metallogenic stage Ⅱ far scenic area of 5,predict total resources about 8.9t;gold metallogenic stage Ⅲ far scenic area of 13,predict the total resources of about 6.4t. |
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