Quantitative Evaluation Model Of Gold Resources Based On Typomorphic System Reflecting Geodynamic Setting And Metallogenic Process

Jiaodong peninsula locates in southeastern margin of North China Craton(NCC)and the east of Tan-Lu fault zone,which is famous gold concentration area in China.The primary type of gold deposit includes quartz-vein type,disseminated-ore type and slip zone type.The scale and potential of Jiaodong peninsula are rictly restricted by strong lithosphere thinning and explosive metallogenic process.The unique dynamic setting by the dominant of NCC destruction cooperated with multiple source material of crust,mantle and crust-mantle leaded to gold deposits' rapid formation and created a huge amount of resources,which leads to a unipue landscape of concentrated distribution of large and super-large gold deposit.This paper takes attempts to set up a quantitative model applied to quantitative prediction and evaluation of regional mineral resources in the way of quantizing multivariate typomorphic characteristics which refer to geodynamic background and ore-forming process under macro and micro conditions.The conclusions have been drawn as followed:1.The lithosphere structure,ages,fabric,geochemistry,mineral assemblage of magmatic rocks and ore deposits,single mineral characteristics et al from 43 gold deposits with different scale have been systematic testing and collection.A typomorphy system applied to quantitative prediction and evaluation of regional mineral resources which refer to geodynamic background and ore-forming process has been tried to set up.2.According to the relationship between metallogenic scale,geodynamic background and ore-forming process,various types of parameters have been quantitatively treated in the way of binary data transformation methods and multivariate statistical analysis.Acomprehensive quantitative evaluation model,which is y=32.33x-122.69,whose core content is the linear relationship between contact degree of ore deposits and gold reserves suitable for regional unit and multivariate comprehensive quantitative prediction evaluation has been set up.3.The multivariate comprehensive quantitative prediction evaluation model and units in this paper based on gravity,aeromagnetics,gold concentration anomaly,pattern of fracture,thermoelectricity in pyrite divide into 39 ? prediction areas,141 ?prediction areas and 319 ? prediction areas to Jiaodong peninsula and predict a total of 5182 t gold reserves for it.It is the first try that transform descriptive parameters,such as geodynamic background and ore-forming process,into quantitative parameters combined with geophysical,geochemical,petrologic and mineralogical factor.And a quantitative prediction evaluation model appropriate for both craton destruction gold deposits and Jiaodong type deposites has been achieved after statistical analysis by theory and method of mathematical geology.And predict a total of gold reserves in new parameters and model.