Study And Application Of RS And Geochemical Information Integration

At this stage,with the increasing demand for mineral resources to nation-building,the surface outcrop and easy exploring mine is becoming fewer and fewer,the exploring of deeper and jumping-off district will be an new target.Because it is difficult to detect, conventional means is no use. So we need a new exploring method.With the deepening of digital geological research,the development of remote sensing technology as well as detection means are constantly enriched.This makes the same target to detect has a variety of detection information. Information Integration used in Mineral Exploration,variety of geo-information can be well integrated together. The question that Information obtained through traditional means detection are less has been solved.Prospecting with Multi-source Geo-information Integration becomes an important issue of today’s prospecting methods.Multi-source Geo-information includes geographic information,geology information,geophysical information,geochemical information,remote sensing information.Remote sensing information comes from the earth’s surface features emission or reflection of electromagnetic waves that is collected by sensors equipped with remote sensing platform.It is used to record the spectral characteristics of surface features,to reflect the nature of features and reveal the intrinsic regular.Geochemical information is the one that reflects the space distribution of all kinds of chemical elements and the elements content.Geophysical information reflects various physical characteristics of rock,which is explored through gravity and magnetic exploration,electrical exploration,seismic exploration of logging methods.Different information describes the geological bodies or geological phenomena in different forms,each of the geo-information has its own characteristics and advantages. So,we can research and analysis all kinds of geo-information’s integration in one area,find the difference,links and complementary relationship between them.This is able to idenTify and make up the geological phenomena and characteristics that a single geo-information can not express.Geologists can master the geology of the study area more comprehensively, practical significance on the geological exploration and prospection work.The existing remote sensing image processing software has a powerful image processing capabilities.However,it’s information extraction function is weak,and it lacks geochemical data processing or analysis capabilities of remote sensing and geochemical exploration. This two information integration analysis is limited.This paper is based on the project of "MIR/TIR multi/hyperspectral mineral mapping maps and remote sensing anomaly information extration".At the present stage,the research of basic theories and methods of multi-source geo-information intergration has achieved rich results.Especially to remote sensing and geo-chemical information integration.With this theoretical basis,We design and develope "Remote Sensing and Geochemical Information comprehensive analysis system".Also,experiments are done using the system in study area.Achieved the purpose of auxiliary prospecting. Major findings are as follows:(1)RS and Geochemical Information comprehensive analysis systemBased on multi-source geo-information integration theory,We analyse the characteristic of remote sensing information and geochemical information.Design the functional modules of RS image processing and transformation,geochemichal data preprocessing,as well as study the algorithm of two information integration. The system was developed based on matlab.(2)Remote sensing alteration information extractionAccording to the spectral characteristics of Fe2+、 Fe3+、 OH" in mineral in remote sensing image.We extract alteration information in study area using Ratio and PCA methods in "Remote Sensing and Geochemical Information comprehensive analysis system".And make the result as decision support material for mineral resources survey.(3)First,we interpolate the geochemical data into image,registrar the image.Then subset the remote sensing image according to the range of "geochemical image".So,the interpolation image and remote sensing image has the same range of coordinates and resolution.Last,do fusion of the two images with inverse-PCA method,and achieved good results.