Journal of Jilin University(Earth Science Edition) ›› 2018, Vol. 48 ›› Issue (1): 318-333.doi: 10.13278/j.cnki.jjuese.20170025

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Geochemical and Geophysical Information Integration Technology for Geological Mapping at Shallow Overburden Area in Northeast China

Zhao Yuyan1, Li Bing1, Lu Jilong1, Hao Libo, Zhao Yu2, Wang Dongming3   

  1. 1. College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China;
    2. Xi'an Institute of Geology and Mineral Resources, China Geological Survey, Xi'an 710054, China;
    3. Heilongjiang Regional Institute of Geological Survey, Harbin 150080, China
  • Received:2017-01-21 Online:2018-01-26 Published:2018-01-26
  • Supported by:
    Supported by the Training Program for Outstanding Young Teachers in Jilin University (419080500564) and the Program of China Geological Survey (12120114042501)

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Abstract: Aiming at the difficulties of geological mapping at shallow cover areas Northeast China, such as fewer outcrops, lower efficiency, lower precision and accuracy, we developed a geophysical and geochemical information integration technology for geological body identification. It is suitable for the shallow cover area in Northeast China, where it is huge with the features of strong physical weathering and small soil displacement. In this method, the entire study area is divided into a number of statistical units, the regional aeromagnetic information in each unit is transformed into characteristic parameters, such as mode, interquartile range, frequency, skewness, kurtosis, and the regional geochemical information in each unit is transformed into the characteristic parameters, such as acidity, alkalinity, calcium content, aluminum content, content of calcium and magnesium, content of aluminum and silicon, content of magnesium and iron, and individual trace elements. Then, all the units are classified step by step based on their characteristic parameters to finally identify geological bodies. Taking somewhere in a typical shallow overburden area in Northeast China as an example, we applied this method. By comparing the results with the known geological information, the recognition results of geologic units are in good agreement with the known information. This method can provide richer geological information and new clues for regional geological research.

Key words: shallow overburden area, geological mapping, geophysical exploration, geochemical exploration, classification, geological body identification

CLC Number: 

  • P623.1
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