沙枣园地段深部地质环境特征研究

doi:10.11720/wtyht.2024.0416

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Abstract

Through surface geological surveys, geophysical measurements, borehole investigations, and 3D geological modeling, the deep geological environment of the Shazaoyuan area has been studied. The lithology, structural spatial distribution, rock integrity at depth, and engineering geological characteristics of the Shazaoyuan area have been preliminarily identified. The main findings are as follows: The granite rock mass in the Shazaoyuan area has a large exposed surface, with relatively uniform lithology, primarily composed of biotite granodiorite of the Shazaoyuan superunit, covering an area of about 330 km². The granite body dips outward and extends to a depth greater than 2 km. There are 12 faults developed in three main orientations: North-northwest, near north-south, and northeast, all with steep dips and intersecting the rock mass. Fractures are well developed in the deep part of the granite, mostly with steep dips and filled with minerals such as calcite and clay. Preliminary delineation has identified more than two favorable rock masses in the pre-selected Shazaoyuan area, which may serve as potential candidate sites for high-level radioactive waste disposal facilities.Though the research,it is proved that the Shazaoyan area has favorable geological conditions for screening the high-level waste disposal bank.

Key words： Shazaoyuan area granite deep geological characteristics engineering quality

Received: 12 October 2024 Published: 08 January 2025

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	P597.3

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	Articles by authors
	Hui LUO
	Wei-Ming CHEN
	Ya-Wei LI
	Xiao TIAN
	Jing-Jia ZHANG

Cite this article:

Hui LUO,Wei-Ming CHEN,Ya-Wei LI, et al. Study on deep geological environmental characteristics of the Shazaoyuan area[J]. Geophysical and Geochemical Exploration, 2024, 48(6): 1568-1576.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.0416 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I6/1568

序号	地层名称及代号	出露面积/ km²	占图幅比例/%
1	全新统洪积砾石、砂砾(Qh^pl)	34.46	4.46
2	全新统风积砂土、含细砾砂土(Qh^eol)	4.29	0.55
3	上更新统洪积砂砾石( $Q p 3 p l$ )	157.51	20.41
4	中更新统湖积粉砂质黏土( $Q p l 2$ )	7.11	0.92
5	白垩系下统新民堡群(K₁X)	88.55	11.48
6	侏罗系中统水西沟群(J₂S)	6.8	0.88
7	奥陶系花牛山群(OH)	30.74	3.98
8	长城系铅炉子沟群(ChQ)	42.69	5.53
9	长城系古硐井群(ChG)	24.51	3.18

Statistics of stratum exposure in the Shazaoyuan area

Simplified geological map of the Shazaoyuan area

Division of intrusive rock units in the Shazaoyuan area

Fault characteristics in the Shazaoyuan area

2D inversion section of AMT resistivity measurements in the Shazaoyuan area

Fracture dip angle statistics for boreholes BS20 and BS21 core samples

Statistics of borehole rock quality classification

3D fracture model of the Shazaoyuan area

3D geological model of Shazaoyuan area

Spatial location of potential sites

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