Research On Remote Sensing Geological Survey In Bilutai Inner Mongolia

The application of remote sensing technology in geological survey has had a profound impact on the development of geological science.From the beginning of the main application of low-resolution remote sensing data,to today high spatial resolution data and hyperspectral data coverage area more and more widely,the application of remote sensing has reached a certain height in space dimension,spectral dimension and time dimension.In the aspect of space dimension,we can get the information of volcanic vent,dyke and other micro-geomorphology from the high spatial resolution remote sensing data;in the aspect of spectral dimension,we can access to highly valuable remote sensing information in the hyperspectral data by analyzing the "diagnostic" spectral characteristics.In this paper,we analyze the integrated application of multi-source remote sensing information in the geological survey of Inner Mongolia using the World View-2 high spatial data,ALOS,ASTER,Landsat series of multi-spectral data and Sentinel-1 radar data.Achieving the following results:1.This paper works on the the study area of lithology stratigraphic visual interpretation and mapping using high-resolution remote sensing data,with reference to the middle resolution data.Classfying Quaternary type in detail with high-resolution data,which was divided into traveling dune,semifixed dune,arrested dune,washland,river terrace and so on;In the high spatial resolution data we can circle the outcrop part covered by sand which are difficult to find out in field reconnaissance;Highly fine texture and tone differences improve the delineation of the boundaries of the accuracy,such as the Cretaceous monzonitic grante.2.Rich color and image pattern information in optical multispectral images and stereoscopic effect information fusion image cannot be separated from each other by L8 data and Sentinel-1 radar data fusion.There are four east-west tectonic belts,eight northeastern tectonic belts,nine NW-trending tectonic belts and undeveloped north-south tectonic belts in the study area.The annular tectonic development in the study area is generally volcanic And the intrusion of rock mass,the plane shape is mostly circular,can be divided into three areas;identify the veins,joints,craters and other micro-geomorphology;determine the volcanic eruption period and type,infer the time of occurrence of geological phenomena.3.In this paper,the improved principal component analysis method is used to extract the anomalous information of remote sensing alteration based on WV-2 data and ASTER data through different spatial scales and spectral scales.Research findings show that part of the intrusive rock and metamorphic rock exposed area and significant alteration information mach well;comparison of geochemical exploration data,copper,lead,zinc and silver anomalies and limonite mineralization point,corresponding to the remote sensing anomaly information area;WV-2 high score data in the extraction of iron dyeing results,compared with ASTER data extraction results,with good details of the embodiment,we can better locate the abnormal information points.4.Based on the Landsat satellite data,the desertification information was extracted from 1985 to 2015 and 30 years by using the decision tree classification method using vegetation coverage,slope,improved normalized water index and near infrared band as classification indexes.According to the dynamic change,the desertification degree in the study area was reduced and the desertification area decreased in 1985 and the trend was reversed.In the government and people's efforts to maintain environmental protection under the premise of the study area of the geological environment in a little better.In this paper,the spatial dimension,spectral dimension and time dimension information of remote sensing images are fully utilized by using various kinds of remote sensing data comprehensively.In the study area,lithology interpretation,structural interpretation,anomalous information extraction and desert geological environment dynamic analysis Have achieved good results for the field inspection route layout to provide a more accurate reference,combined with geological environment and mineralization laws,delineation of mineralization targets.