三维地质建模在高放废物地质处置预选地段筛选中的应用——以新疆预选区天湖预选地段为例

doi:10.11720/wtyht.2021.0525

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Abstract

Based on the theories and methods of 3D geological visualization models and the geological data of the Tianhu preselected site, a geological model of the site was established in this study using the Deep Insight TM geoscience modeling software. It describes the 3D tectonic morphology of the preselected site, carries out 3D visual analysis of the geological conditions of the study area from 2D to 3D, from overall to local, and from macroscopic to microscopic aspects,and intuitively expresses the distribution regularity of geological information in the main rockmass used for the disposal of high-level radioactive wastes. The granite rock massatthe Tianhu site occurs in equiaxed rock stocks, with simple lithology and large volume.There is only an NW-tending fault with a length of 2 km developing in the southeastern part of the rock mass. Besides, veins and alteration zones are relatively developed in the rock mass, which affects the integrity of the rock mass to a certain degree. The model can be used to query and update geological data at any time, analyze the distribution characteristics and laws of various geological information in the whole model, and improve the understanding of geological laws. All these willassist in better guiding the site selection, assessment, and construction of disposal repositories.

Key words： geological disposal of high-level radioactive waste Tianhu preselected site site screening geological modeling

Received: 01 September 2021 Published: 21 December 2021

ZTFLH:	P587
	P597.3

Corresponding Authors: JIANG Shi E-mail: luo1029hui@163.com;45493666@qq.com

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	Hui LUO
	Shi JIANG
	Hong-Gang ZHAO
	Ya-Wei LI
	Xiao TIAN

Cite this article:

Hui LUO,Shi JIANG,Hong-Gang ZHAO, et al. Application of 3D geological modeling in screening of sites preselected for geological disposal of high-level radioactive wastes: A case study of Tianhu preselected site, Xinjiang[J]. Geophysical and Geochemical Exploration, 2021, 45(6): 1488-1496.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.0525 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I6/1488

Geological map of Tianhu area
1—Quaternary Holocene lake deposits; 2—Holocene alluvial deposits; 3—Pleistocene-Holocene alluvial deposits; 4—gray metamorphic conglomerate and sandstone of the middle section of Hongliuhe group; 5—gray metamorphic sandstone of the lower section of Hongliuhe group; 6—grey-black siliceous rock with breccia limestone of Cambrian Xidashan formation; 7—marble, dolomitic marble and schist of Changcheng system Gudongjing formation; 8—gray biotite schist, gneiss and marble of Tianhu iron ore rock formation ; 9—early Triassic Weiya monzonitic granite; 10—early Triassic Weiya sub-quartz syenite; 11—early Triassic Tianhu medium grain porphyritic biotite monzonitic granite unit; 12—early Triassic Tianhu fine-grained biotite granodiorite unit; 13—early Triassic Tianhu fine-grained monzonitic granite unit; 14—late Permian medium-grain biotite granodiorite; 15—late Permian medium-grain biotite monzonitic granite; 16—Devonian monzonitic granite; 17—Mesoproterozoic gneissic biotite granodiorite; 18 —Mesoproterozoic gneissic biotite potassium feldspar granite; 19—fine-grained granite veins; 20—medium-basic dykes; 21—faults; 22—fracture alteration zone; 23—geological boundary ; 24—profile position;25—drilling position and number

Work area construction and data loading

Fault model

Fig.1)
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Geological body model(the legend description is the same as Fig.1)

Model of dyke and alteration zone

Fig.1)
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Geological model of Tianhu area(the legend description is the same as Fig.1)

Fig.1 and Fig.3)
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3D relationship between rock mass and fault, dyke and alteration zone(the legend description is the same as Fig.1 and Fig.3)

Fig.1)
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Generation of geological section in Tianhu area(the legend description is the same as Fig.1)

Fig.1)
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Local excavation of Tianhu model(the legend description is the same as Fig.1)

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