Gold Polymetal Mineralization Allocation Projection Research In Yunnan Ailaoshan

Ailaoshan region is located in south-central Yunnan Province, south-west Sanjiang region is one of the most important gold-polymetallic deposit , as well as one of the 16 important geological areas of Ministry of Land and Resources'new round of geological prospecting work.This paper is part of the thematic contents in the "Eleventh Five-Year" national scientific and technological supporting project << Ailaoshan region gold-polymetallic mineralization laws and methods and techniques of prospecting thematic study >> to complete the course The topic is the location prediction part of the thematic study.Ailaoshan metallogenic belt has intense tectonic, magmatic activity, and there were varying degrees of metamorphism and multi-phase meeting of the mineralization, has laid a good tectonic belt forming conditions, the formation of the different types of ore-forming system, the output of various mineral resources. A long time, geologists has made painstaking efforts in Ailaoshan region on the basis of geological research and mineral exploration work.In the region there has been found Xinping Dahongshan iron copper, Mojiang gold factory- Anding gold nickel, Zhenhuan Laowangzhai and Donggua Lin Jin, YuanYang Daping silver lead and zinc large and medium-sized bronze, and even super-large deposit, a large number of new deposits (points) are constantly emerging, it is a wide prospect.The area has taken shape in China's western region's key gold polymetallic mineral survey and development base,it is an important mineral base in southwest China.This thesis is combined with the need of our study, focus on representative mineral fields such as Laowang stockaded village in Zhenyuan, Ailaoshan District of Yunnan Province, Mojiang Gold Factory, Yuanyang Daping gold mine etc. to study its forming formula and mine searching style, using GIS as the technic platform, develop and improve mineral fields location searching system based on the earth, object and chemistry. Sum up and set up a mineral fields supported by geology, mineral fields technology and so on. With the help of GIS, study on middle or large scale, combine different subject to explain and estimate to study on searching for mines and an effective method.On the premise of past achievements, in this paper, a great deal of information gathered about the Geological feature, the Physical feature and the Chemistry characteristic of the Ailao Mountain metallogenic belt ;based on a system of coordinates data of MAPGIS platform ,charted thematic maps;re-processing the 1:200000 stream sediment survey data of the Ailao Mountain metallogenic belt,Zhenyuan Laowangzhai,Mojiang gold factory,Yuanyang Daping typical gold mine, studied the formation of the combination of geochemical elements;delineated in the study area as a target of 21 units to predict,according to geological, geophysical, geochemical selected 30 variables,the special chart level and the target area chart level of the 30 variables superimposes separately ,make the evaluation and forecast ;through to element variable computation,carries on the unit according to the unit relation the division, classification of units,ore-forming conditions of the study area to evaluate the good or bad.Through this research, we get the following conclusion:1.Ailaoshan metallogenic belt ore-forming geological characteristics of the background of the Presinian system basement (Mesoproterozoic million), basal control cover, the basement rock and construction of the control framework, which is an organic link between the whole. Ailaoshan metallogenic belt is to the basement for the North West, the parallel distribution of the basement of the North West, the direction of groups of very intensive development of structure, control Ailaoshan distribution of metallogenic belt direction. Gold deposits in densely populated areas, the abnormal density area to a distribution of the North West. It should be noted in the particular North and the South.North West to cut constructed structure, so that Ailaoshan metallogenic belt is divided into two parts.2.Ailaoshan gold belt element with the exception of the controlling factors of rock with the rules of the control element, the base of the control elements of the distribution of the factors so that it can not be ignored. Ailaoshan gold ore belt element is related to the control of the substrate edge, usually in the basement rocks of the scope of development in vivo. Therefore, the contact zone in the North West development of gold and copper anomalies. Lead, zinc, silver abnormal development of the contact zone in the southeast. To rock as the central element in the formation of asymmetric sub-band features. 3.This prediction is focus on mineral deposits in the forecast level of cell division in the main, unit the earth by earth unit method. The sort of mine is gold and mixed metal mine. The area of research is decided in the zone of Zhenyuan, Ailaoshan District of Yunnan Province, Mojiang Gold Factory, Yuanyang Daping gold mine. The forecast scale is 1:20 million and the purpose is to explain the possibility of every possible area. Here we take 21 target area to be our prediction object, Take the forecast as the dependent variable,distill different period magma rock ; rupture structure from different direction and their charicterictic of transformation and tendency. Distributing, quality, transformation of the Rupture. Evaluate the unconventionality of 30 variable of earth, exploration, and earth chemistry on gold, silver, copper, plumbum and so on. To value the area which is being studied.4.Here we pick out 26 variables with two methods of analyzing the use of the characteristics, and according with the relationship of calculating the variables in weighting coefficient to choose important variables. Variable assignment in the unit and optimization based on the variables of the calculation unit, according to degree of cell contact to carry out the division of cells, which were graded on the unit. The study area can be divided into 21 units ,A, B, C three degrees. After calculation, A-level unit, a total of five, in order to benefit the level of mineralization the best source, their unit numbers are 19, 11, 21, 4 and 6. Their convergence in a multi-band structure, a variety of selected Geological, aeromagnetic, geochemical data on the variables are reflected in this unit can be used as the focus of new exploration targets to do further study. 6 units of which there have been large-scale occurrence of Laowangzhai on Unit 6; B-class unit, a total of ten, in order to moderate the extent of forming beneficial mineral exploration development can also be used as research subjects, their unit numbers are 15, 7, 12, 16, 14, 3, 20, 18, 17 and 13. Unit 7 and 18 have been large-scale occurrence, namely, plant and Daping gold mine ; C-class unit, a total of six for the least favorable ore-forming ore source. We do not study it as the opponent of development temporarily . Their unit numbers are 1, 2, 8, 5, 10 and 9.