Journal of Jilin University(Earth Science Edition) ›› 2016, Vol. 46 ›› Issue (6): 1895-1913.doi: 10.13278/j.cnki.jjuese.201606308

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Technology and Method of Multi-Data Merging in 3D Geological Modeling

Wu Zhichun1,2,3, Guo Fusheng2, Lin Ziyu2, Hou Manqing1,2,3, Luo Jianqun1,2,3   

  1. 1. Key Laboratory for Radioactive Geology and Exploration Technology, Fundamental Science for National Defense, East China University of Technology, Nanchang 330013, China;
    2. School of Earth Sciences, East China University of Technology, Nanchang 330013, China;
    3. Key Laboratory for Digital Land and Resources of Jiangxi Province, East China University of Technology, Nanchang 330013, China
  • Received:2016-04-11 Online:2016-11-26 Published:2016-11-26
  • Supported by:
    Supported by Geological Survey Projects of China Geological Survey (1212011120836, 1212011220248), Fundamental Science on Radioactive Geology and Exploration Technology Laboratory (RGET1305) and Key Laboratory for Digital Land and Resources of Jiangxi Province (DLLJ201614)

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Abstract: The polyphyly of the modeling data is the most important character of the 3D geological modeling. The key to the model building is merging these data effectually to increase the accuracy and dependability of the model. This article expounds unifying the coordinate system and scale of geographical, geological, geophysical, geochemical, remote sensing, drilling, mining and other modeling data, then using the datum to construct the original database. Use the contour data to construct the DEM (digital elevation model) plane and define DEM surface as a carrier to realize the effective fusion among the surface geological datum such as the surface geological mapping route PRB (point-routing-boundary) data, vector geological maps and remote sensing images; Under the constraint conditions of the surface geological data and underground geologic data, achieve the fusion of geological data and the underground geological data through constraint and DSI (discrete smooth interpolation) technology; According to the existing modeling data to determine the reasonable modeling unit, classify point, line, surface and volume in database, then build the original database as same as modeling units. In the original database, using high precision geological data as the constraint, integrating modeling data and the three-dimensional spatial distribution of geological body, three-dimensional geological interpretation of geophysical prospecting has realized the integration between different data precision; Constructing the initial geological interface with the main modeling data and constraining the initial geological interface with high precision modeling data, we implement the integration between main modeling data and secondary data. Some constraints like constraining line with point, constraining surface with point (line) and constraining a surface with another surface play an important role in the process of modeling data fusion.

Key words: 3D geological modeling, multi-data merge, GOCAD software, constraint technique, Xiangshan volcanic basin

CLC Number: 

  • P623
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