l:50000 regional geological survey is a very important item of fundamental geological work and a hard task as China is a very large country. In the past few years, remote sensing technology played an active role in speeding up 1:50000 regional geological survey and more experience has been accumulated. In order to meet the new requirement of geoscience development and the urgent need of national economy and construction, to improve the quality of and speed up the 1:50000 regional geological investigation, remote sensing technology must be spread in an all-round way. Further bringing the unique technology into full play and combining it with other new technology and methods, remote sensing technology will make new contribution to the strategic task of 1:50000 regional geological survey in this century under the new working procedure.
Tong-Nan-Ba structure is a large hydrocarbon trapping structure in the northeast of Sichuan basin. In the past years, a great deal of research have been take placed on it. Remote sensing utilizing satellite imagery is one of new tools in search for hydrocarbon. It provides a mean for obtaining valuable information which will be useful in further exploration, At the same time, it reduces total cast of exploration considerably. This paper is a try of using SPOT data to study hydrocarbon structure. In the paper, the geological mapping utilizing SPOT image is presented, and lineament pattern and its relationship with subsurface gas-bearing structure is discussed.
This paper focuses on how to process the airborne comma data of GR- 800D high sensitivity spectrometer and apply them into uranium exploration. In order to get a matrix of array data which is similar to tile MSS image intensity .of pixels, the interpolation method, data compression and gray scale conversion method are employed. Then the data are input into image processing system in which a variety of manipulations such as enhancement, abstraction, integration and decomposition are utilized. Also multi-geological data such as geophysical and geochemical data are integrated with remote sensing data. Based on the comprehensive, analyses of the processed data, some new geological structure and mineralization have been found and some flew understandings have been obtained. All these not only are of geological importance for understanding of the tectonic setting of uranium mineralization and further explorating in Lianshanguan, but also promote the second development of airborne gamma data and the advancement of digital image integration technique of multi-geological data.
On the basis of thoroughly study of geological condition of clay minerals in the boundary area between Jiangsu and Anhui provinces, through interpretation of aerophoto, the image characteristics of clay mineral resources are established, and the prospective region of them are located. The effects are better confirmed by our field survey.
The methodology of several new image processing techniques which are directed against the particularity of geological image is presented in this paper. Especially, the Logic Operations including Nothing. Anding. Oring and Exclusive Oring, and the Spatial Operations which include Dilation. Erosion. Opening’ and Closing in Mathematical Morphology have been introduced into geological image processing. Additionally, several technical improvements have been made in terms of the special requirements of geological image processing for the analyses of spatial/logic relationships between different geological features. Based on geological image processing, various geological variables have been extracted for displaying, image processing and mineral exploration. Finally, the W-Sn-Pb-Zn multiple mineral deposits have been predicted in Xinghualing region, Hunan province, China, according to parts of the geological variables extracted from multi-geoscience information including geological, structural, mineral deposit, alteration, geophysical and geochemical data, and the primary result of mineral prediction is achieved.
This paper describes the principle and the calibration method of interpretation on heat condition using the thermal IR data from the Landsat TM sensor. Some results of interpretation study are shown
The present paper deals with the technique of digital SAR-TM combination as well as the applicability of the combination image for geologic mapping. The process of combination takes on three steps. At first, Six seperate strips of radar data at 3M pixel resolution are mosaiced together to form a 900km2 image. Secondly, the SAR and TM data were respectively registered to GaussKruger projection system’ Finally, the false color composite image is produced in following manner: TM4 + SAR(R), TIS + SAN(G), and TM3 + SAR(B). Compared with the original image. Digital SAR-TM combination image has following advantages ; 1 ) The geologic interpretability is enhanced, 2 ) the geometric distortion of terrain featurs is improved, 3) the distinction of the whole image is intensified, because the local shadow area can be diminished due to the supplement of SAR and TM each other. The image of digital SAR-TM combination have abundant remote sensing information. It’ is a powerful tool for geologic interpretation and mapping (on scale 1: 50, 000-1: 100, 000 ).
This paper presents briefly the modern trend of development of remote sensing techniques and the state of affairs, that the developed and developing countries are planning to launch a series of new high-quality satellites for environmental-monitoring and exploration of natural resources. This paper describes in detail the perspective of application of remote sensing techniques in wide field as for: geology, oceanology, resources environments, agriculture, forestry etc.