A NEW METHOD FOR COLOR MEASUREMENT OF QUATERNARY DRILLING CORE DEPOSITS |
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| Authors: | HE Fu-bing XU Xi-wei ZHENG Gui-sen SUN Yong-hua ZHANG Wei LI Li LI Rui-jie |
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| Institution: | 1.Institute of Geology, China Earthquake Administration, Beijing 100029, China;2.Beijing Institute of Geological Survey, Beijing 100095, China;3.Beijing Geology Prospecting & Developing Bureau, Beijing 100095, China |
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| Abstract: | In this paper, a method for measuring the color of Quaternary sediments based on digital image analysis is proposed, which has the advantages of simple and quick operation, and improving the research efficiency of sediment color. In order to demonstrate the feasibility of this method, the measurement results are compared with the traditional colorimetric measurement methods. The results show that:1) Both the traditional sediment color measurement method and the digital image color measurement method are controlled by sediment grain size. Sediment color research can be carried out on fine sand or finer sediments, but for medium grained sand and coarse sand, the error will be larger. Compared with the traditional measurement methods, digital image method can reduce the inherited color interference of coarse clastic sediments; 2) The particle size and water content of clastic sediments affect the numerical value of digital image sediment color. Generally, the wet-color values obtained by the digital image method are lower than the dry-color values obtained by using a spectrophotometer, and the color value variation is large, and the undulation of chromaticity/brightness curve is greater; 3) Compared with the traditional sediment color measurement method, digital image method has good consistency of color measurement of redness and yellowness, but the brightness is affected by uneven illumination, resulting in some error. Sediment digital image extraction of sediment color information can replace the indoor measurement method to a certain extent, and can be used to establish a more complete sediment color sequence under more complex sedimentary environment, so as to provide information for the Quaternary stratigraphic division, paleoclimate research, paleosol recognition and paleoearthquake event identification, thus expanding the application of colorimetric results to the geological direction. |
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| Keywords: | core drilling Quaternary sediments colorimetric measurement digital image analysis geo-application |
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