The Research Of Evaluated Method Without Model And Its Application

The mineral evaluation of general information is a method ofmineral resource evaluation put forward in former century in the middleof eightieth by quondam ChangChun Geological College MathematicalGeologic Graduate School. Through the development of more than 20years,it has been a set of strong function method with basic theoriesand systematic approach,and it occuyies a place in domestic andinternational in that realm research.The single mineral evaluation andthe series of mineral evaluation and the method of the large—thesuper large mineral resource evaluation in the methodologicalsystem have got better application in the work,also have acquiredfavorable purpose,especially good in areal evaluation.The series ofthis method still need amelioration in the development angle,and theresearch in the evaluation method under big scale conditions is moreoutstanding.The characterictics of the big scale mineral evaluation isthat the area of the investigated sections are small,and the area is fromseveral to thousands of square kilometers.The objects of evaluationare mineral bed and mineral style,and the conclusion of evaluation iseasy to verification and is practical.The mineral resource condition inthe research area that has been known usually has affinity with workdegree in seeking mines.Some mineral resouce that have been foundhave more producing area in the area with higher work degree,such asthe gold mine in ShangDong Province which has many mineralbed.Then the region of lower degree,especially the region withpredominant conditions and future,usually have few or have no themineral bed that is known,which results in the evaluation thought ofmodeling—transform—constitute digital model—evalution is hard toactualize.Then the article tries to put forward a method to solve thequestion.According to the principia of mineral evaluation under big scale,weput forward the flow of evaluation without model,as picture 1.A. The geology of Jingbulake1. stratumThe stratum of the area are mainly Proterozoic Era,Mesozoic andCenozoic,as in table 1.2. intrusive sheetThe intrusive sheet grows well in the area and mostly bedistributed in NaLaTi huge swoop jumbly rock cincture,and it shows abelt northeast east in accordance with the structure line of the district.The intrusive sheet in this area is divided into two parts,one ishypogene rock which is Proterozoic granitic-gneiss sequence (it has 4incursions),and the other is the normal intrusive sheet which is dividedto Mesoprotero Era feebleness gneiss-granitic sequence(it has 2incursions) and Late-Yuan-Antiquity granite incursion and Devonianjixing-super jixing rock and the late Carboniferous granite sequence(ithas 4 incursions).The metamorphic rock in the area is abundant and mainly is areametamorphic rock with a small quantity of kinetic metamorphic rockand hot contact metamorphic rock.(1) Area metamorphic rockIt includes NaLaTi rock throng metamorphic rock with itsdegenerative effect and Great Wall century Aksu rock throngmetamorphic rock with its degenerative effect.(2) Kinetic metamorphic rockIt is development in the area.According to the setting layer andtransmogrification mechanism and stress intensity etc.,we divied thekinetic metamorphic rock to tough tectonic rock and brittle tectonicrock.4. StructureThe structure in the area exercises strong and mostly isfaultage,the size of which is vary.There are tough faultage and brittlefaultage,and the tough one is formed by extrusion from north andsouth.Then the brittle one is mainly pression and wring faultage,one ortwo is positive paultage and the big scales are expected to active muchmore.The primary fracture structures in the area are NaLaTi chinefracture,Akewuzeng fracture,the upriver of Kuerdai tough-brittlefracture,the mylonite middle of Kuerdai River and the mylonite inKuerdaidaban.B. The explanation of geochemical information1. The geochemical parameter's character of elementsThe geochemical date we use primarily are water systemsediment and rock's measure etc.,then the result indicates thatelements Ag,Au,Cu,Ni,Pb may become mines.2. The element's geochemical character in areaThe elements' picture of geochemical isoline distinctly portrays thevariety trend for elements in the area.According to the comparability ofvariety trend, this 8 elements can be divided into three kinds.(1) The first is Ag,Au,Sb,As four elements.(2) The second is Cu,Ni,Zn three elements.(3) The third is Pb elements.C. The anomaly and character of elements1. element's anomalyFrom the table of element's anomaly,we can know that the most isAs according to the amount of anomaly,which shows the strong abilityof the element's movement.Then the next is Pb,Au,Ag,Cu,Ni etc.,andthe least is Zn,Sb which are single anomaly and show the bad activityin the area. Based on these characters,the pramary miniral elements inthe area must be Pb,Cu,Ni,Au,Ag.2. Compositive anomaly and its characterThere are 11 compositive anomaly in Jingbulake district,and theyhave such characters:(1)The size of the anomaly is six to one.The single elementanomalies is small and the complicated ones are bigger.(2)The compositive anomaly and the elements combination haveobvious successive character,the minaral is diverse.(3)The meaning of seeking mineral for complicated elements'compositive anomalys is easy to judge.(4)The primary geological factors to control the anomaly areNaLaTi south-north deep reuture and east-west rupture and the toughsheared strips.The space distributing of the compositive anomaly have obviouszoniferous regulation,it can be divided into three compositive anomalystrips from north to south.D. Compartmentalize geological unit and pick up the variables1. Compartmentalize geological unitAccording to the geological condition and the mineralizationinformation of compositive anomaly in Jingbulake,we mark off 11 unitsin the area.2. Pick up the variablesAccording to the connection between the geological units and thegeological condition and that between character and mineralization ofunits and units,we put in 22 variables.Then based the principle that ifthere is variable in or around the unit,we evaluate the variables,existing to"1", nonexistent is"0".E. Mineral evaluationWe choose clustering,quantity theoryⅣ and characteristicanalysis as digital model,then compare the results of this threemethods,which shows mineralized natural sort.Namely number 1-4units is a group and number 7-11 is a group,and number 5 and 6 areuncertain.This result indicates the changes of the mineralizedcharacter and the condition of controled mine in the area.The main result of the evaluation is showed by mineral estimationpiction.F. Get a conclusionNaLaTi jumbly rock strip not only is a huge tectonic magma rockstrip,but also is a important mineral strip.The mineralization in theresearch area mainly is Ag and Pb.Considering the mineralizedcharacter of elements Au,Ag,Cu not in the area,here should be a noblemetal and multi metal mine.The advantaged district of Ag mineralization is Kuerdai River-eastbranch channel of Jingbulake,and unit 1 is a important district to seekmine.Then the advantaged ditrict of Pb,Ag is downstream ofAkewuzeng,and unit 4 is a Pb,Ag mine spot.Though Pb mineralization in the south is a distrct by itself,it is not aimportant area to seek mine.