Geological Interpretation And Structure Analysis With Remote Sensing Images In Shibing Aera Of Guizhou

As a modern information technology,the remote sensing technology plays an important role in the field of geological application.The remote sensing image has a series characteristics of macro,intuitive and accurate.Therefore,remote sensing technology can show its unique advantages in some aspects,such as stratigraphic lithology identification,tectonic unit analysis,intrusion unit partition and analyze the causes of Cenozoic formation.In recent decades,remote sensing technology has made a great progress in obtaining geological information technology which includes the identification of formation lithology,interpretation of geological structure and extraction of mineralization alteration information.Especially for some area with remote location,poor natural environment conditions or little existing geological data,remote sensing technology can provide reasonable deployment,reduce the length of the field investigation,extract the geological phenomena such as lithology and geological structure accurately,Meamwhile,it can reduce work intensity,shorten the working period,save a certain amount of manpower,material resources and financial resources.The study area is located in Shibing of Guizhou Province,where has a complex geological conditions,good vegetation cover,poor roads,large valley cutting and less exposed rock,eventually lead to field investigation blocked,limited visual field,so formers haven't carried out in-depth work.Therefore,this paper selected this region as study area,and carried it on the remote sensing geological interpretation,including strata interpretation and geological structure interpretation based on remote sensing technology,and the interpretation results relate to the analysis of the thematic structure characteristics.The main research results and cognitions of this paper are shown as follows:(1)This study got the image map of ETM+ and SPOT6 in certain area,then pretreatmented remote sensing images,including geometric correction,image fusion,image enhancement and image clipping,thus made out the orthophoto map.(2)The author interpreted the strata and structure of study area,determined the interpretation marks of strata lithology and structure,completed remote sensing interpretation of 19 strata units and the main structures in study area,compiled remote sensing geological interpretation map and structural interpretation thematic map.(3)According to the results of remote sensing geological interpretation,we find the study area experienced multiple tectonic movements,faults structures in different periods,different types and different order compound,combined and cut mutually.Got the main fracture structures in the area,then divided it into three groups from the developmental direction,one is NE,the second is EW,the third is NW.According to the image combination form and the development rules of faults in this area.This three groups can formed into two periods: the EW joint and the EW fault formed in a period,the NE joint,the NW joint and the NE fault,the NW faults are the same period.The most dense joints just like a east to west band distributed in the south of BaiDuo Township and the north of ShangWengshao Village,which located in northern part of study area.A band of potassium magnesium lamprophyre or some similar rock exposed in this area.Therefore,there is a close relationship between lamprophyre and the EW structure.Fold and ring structures in study area are less exposed,the limb of fold cutting by faults formed incomplete,part of the cause of ring structure may related to fault block,and another unknown.(4)According to the remote sensing-structure comprehensive analysis,this study organized tectonic evolution sequence of study area,extracted geological structure information of different scales,types and levels effectively.It is proved that the remote sensing technology is comprehensively applied to the objective extraction of information in complex structure area,which has a prominent advantages and broad prospects.This study provides a strong basis for further regional geological work in the work area.