Study On Characteristics Response Relationship Between The Rock Spectrum, Physical Properties And Main Chemical Properties

The surface features have the function of reflecting,absorbing and emitting electromagnetic waves,which remote sensing technology uses to carry out the work of classification and information identification.Rock is a combination of minerals that consists of one or more minerals.According to the interaction between electromagnetic objects and electromagnetic waves,the main factor affecting the spectral characteristics of rocks in the full-color wave band?at 350-2500 nm?are the chemical elements and physical properties of rocks.Due to the electronic transitions and molecular vibrations of mineral chemical components,generated mineral-specific spectral features such as Fe²⁺,Fe³⁺,and Mg²⁺.The physical structure of rocks is complex and has various causes.It is affected by various factors such as geology,temperature,weathering,and atmospheric environment,making rocks produce different physical properties.These physical properties are mainly represented by density,susceptibility,resistivity,porosity,dielectric properties,etc.This paper studies the relationship between 590 rocks metal composition?Fe?Ti?V?Mn?Zr?Co?Zn?Nb?Bi?Pb?in Xingcheng Area,rock physics?density,magnetic susceptibility,resistivity,permittivity?,and rock spectrum.The correlation analysis of each physical and chemical parameter with the original spectrum,the depth of spectral absorption,and the high and low frequencies after spectral wavelet packet decomposition was performed to find the characteristic bands of spectral absorption and reflection of each physical and chemical parameter image.Relevant and partial correlation studies were conducted among the metal elements,between physical characteristics and between physics and metal elements,and related parameters were investigated.These studies laid the foundation for the rock lithology classification,the inversion of some metal elements and physical properties,and some parameters be used to predict the close relationship parameters,and opened up new avenues.This article mainly achieved the following results.1?The content of Fe in igneous rock is higher,and the correlation with the spectr?m is more significant.There are characteristic reflection bands of Fe near the0.4?m and 0.54?m bands,and there are characteristic absorption bands of Fe in the bands of 1.0-1.5?m;In the range of 0.4-0.55?m and 0.6-0.65?m,the correlation between Ti and spectrum is more significant.There may be a characteristic reflection band of Ti near the 2.21?m band,and a characteristic absorption band of Ti near the2.28?m band;In the range of 0.4-0.48?m,Mn has an important influence on spectral reflectance,and there is a characteristic reflection band of Mn near the 0.41?m band;The igneous rocks and sedimentary rocks have large differences in the correlation between V elements and spectrum;The correlation between the sedimentary rocks Zn element content of the sedimentary rocks and the spectrum is significantly greater than that of the igneous rocks.There may be igneous rocks characteristic reflection bands of Zn near the 0.41,1.36,and 1.59?m bands,and the Zn characteristic bands in the sedimentary rocks may exist near the 2.34?m band;There may be a Bi element characteristic band near the 0.55 and 0.6?m bands.Near the 2.14?m band,Bi element has an important influence on the absorption of sedimentary spectrum;The characteristic band of Pb may exist near 0.45,0.54,2.29?m.2?Among the metallic elements,there is a significant positive correlation between Fe and Ti,a strong positive correlation between Ti,Fe and V,and a strong positive correlation between Zn and Pb.And it is ideal to fit Ti with Fe element,which is linear,primary and secondary.3?In the study of the relationship between various rock physical properties and s spectrum,density has good absorption and reflection characteristics of the spectrum in the range of 0.57-0.85?m;Near the 0.53?m band,susceptibility gives strong reflection in the spectrum.And near the 1.08?m band,susceptibility makes the spectrum produce stronger absorption;The correlation between resistivity and spectrum and the correlation between density and spectrum are very similar,which also verifies that there is a significant positive correlation between resistivity and density.In the vicinity of 0.6,0.77 and 2.32?m,resistivity makes a strong absorption spectrum;Near the 1.85?m band,the dielectric constant makes the spectrum produce strong absorption characteristics,and the absorption characteristics of sedimentary rocks are more pronounced.4?In the relationship between rock physical properties,it is found that there is a significant positive correlation between density and resistivity.However,the use of various functions to fit the effect is not ideal and needs further exploration.5?In the relationship between chemical elements and physical parameters of rocks,it was found that the correlation between density and metal elements was weak.There is a significant positive correlation between Fe and Ti elements and susceptibility.The correlation between resistivity and various metal elements is weak.The permittivity is positively correlated with various metal elements,and the correlation between V,Zn and Bi is the most significant.