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Research on Stress Field in Inner Mongolia Based on Bayesian Method
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Fan ZHANG1, 2, Fengzhi CUI2, *, Meixian HAO2, Yanming YANG2, Juan LI2, Xiaozhong YANG3
Journal of Geodesy and Geodynamics | 2025, 45(3) : 252 - 259
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Journal of Geodesy and Geodynamics | 2025, 45(3): 252-259
Research on Stress Field in Inner Mongolia Based on Bayesian Method
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Fan ZHANG1, 2, Fengzhi CUI2, *, Meixian HAO2, Yanming YANG2, Juan LI2, Xiaozhong YANG3
Affiliations
  • 1 School of Control and Computer Engineering, North China Electric Power University, 2 Beinong Road, Beijing 102206, China
  • 2 Earthquake Agency of Inner Mongolia Autonomous Region, 80 Jirem Road, Hohhot 010010, China
  • 3 School of Mathematics and Physics, North China Electric Power University, 2 Beinong Road, Beijing 102206, China

    • ZHANG Fan, senior engineer, majors in earthquake prediction methods, E-mail:

About Author:

ZHANG Fan, senior engineer, majors in earthquake prediction methods, E-mail:

Published: 2025-03-15 doi: 10.14075/j.jgg.2024.04.172
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We investigate the crustal stress field in Inner Mongolia using 728 focal mechanism solutions and 14 460 P-wave polarity data derived from 2 793 earthquakes based on three different strategies. The Inner Mongolia area is divided into 1°×1° grids, and three methods are applied: a composite focal mechanism solution method based on first-motion polarity data, a Bayesian right trihedra method(BRTM) based on focal mechanisms, and a weighted fusion method of polarity and focal mechanism data. The results from polarity-based and focal mechanism-based methods show good consistency. The abundance of polarity data, compared to limited focal mechanism data, enables stress inversion in a wider spatial extent. After weighted fusion of polarity-based results with focal mechanism data, the BRTM successfully obtains stress results at 125 grid points, expanding the coverage and reducing uncertainties. The study reveals significant spatial variations in the stress field across Inner Mongolia area. The eastern regions are dominated by shear and extension, with shearing concentrated along the Daxinganling and extension characterizing the basins on both sides. Localized compression is observed near Chifeng and Tongliao in the southeast. The northern margin of Ordos block exhibits extension characteristics, while the Alxa block displays shear features. The orientations of maximum principal stress exhibit considerable differences, while the minimum principal stress directions remain relatively uniform.

tectonic stress field  /  BRTM  /  focal mechanism  /  Inner Mongolia
张帆, 崔丰智, 郝美仙, 杨彦明, 李娟, 杨晓忠. 基于贝叶斯方法的内蒙古地区应力场研究. 大地测量与地球动力学, 2025 , 45 (3) : 252 -259 . DOI: 10.14075/j.jgg.2024.04.172
Fan ZHANG, Fengzhi CUI, Meixian HAO, Yanming YANG, Juan LI, Xiaozhong YANG. Research on Stress Field in Inner Mongolia Based on Bayesian Method[J]. Journal of Geodesy and Geodynamics, 2025 , 45 (3) : 252 -259 . DOI: 10.14075/j.jgg.2024.04.172
Funding
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  • Natural Science Foundation of Inner Mongolia Autonomous Region(2024MS04021)
  • Director Fund of Earthquake Agency of Inner Mongolia Autonomous Region(2023GG02)
Appendix
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Year 2025 volume 45 Issue 3
26
10
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Article Info
doi: 10.14075/j.jgg.2024.04.172
  • Receive Date：2024-04-14
  • Online Date：2026-10-30
  • Published：2025-03-15
Article Data
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History
  • Received：2024-04-14
Funding
Natural Science Foundation of Inner Mongolia Autonomous Region(2024MS04021)
Director Fund of Earthquake Agency of Inner Mongolia Autonomous Region(2023GG02)
Affiliations
    1 School of Control and Computer Engineering, North China Electric Power University, 2 Beinong Road, Beijing 102206, China
    2 Earthquake Agency of Inner Mongolia Autonomous Region, 80 Jirem Road, Hohhot 010010, China
    3 School of Mathematics and Physics, North China Electric Power University, 2 Beinong Road, Beijing 102206, China
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https://castjournals.cast.org.cn/joweb/ddcl/EN/10.14075/j.jgg.2024.04.172
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
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Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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