武汉市碳酸盐岩天兴洲条带砂化白云岩成因机理及其工程特性

莫云; 胡新丽; 崔德山; 谢昭宇; 金新锋; 熊宗海

doi:10.3799/dqkx.2024.052

Volume 50 Issue 6

Jun. 2025

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Article Navigation > Earth Science > 2025 > 50(6): 2298-2310

Mo Yun, Hu Xinli, Cui Deshan, Xie Zhaoyu, Jin Xinfeng, Xiong Zonghai, 2025. Formation Mechanism and Engineering Characteristics of Sandy Dolomite in Wuhan Tianxingzhou Carbonate Rock Belt. Earth Science, 50(6): 2298-2310. doi: 10.3799/dqkx.2024.052

Citation:

Mo Yun, Hu Xinli, Cui Deshan, Xie Zhaoyu, Jin Xinfeng, Xiong Zonghai, 2025. Formation Mechanism and Engineering Characteristics of Sandy Dolomite in Wuhan Tianxingzhou Carbonate Rock Belt. Earth Science, 50(6): 2298-2310. doi: 10.3799/dqkx.2024.052

Citation:

Mo Yun, Hu Xinli, Cui Deshan, Xie Zhaoyu, Jin Xinfeng, Xiong Zonghai, 2025. Formation Mechanism and Engineering Characteristics of Sandy Dolomite in Wuhan Tianxingzhou Carbonate Rock Belt. Earth Science, 50(6): 2298-2310. doi: 10.3799/dqkx.2024.052

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Formation Mechanism and Engineering Characteristics of Sandy Dolomite in Wuhan Tianxingzhou Carbonate Rock Belt

doi: 10.3799/dqkx.2024.052

Mo Yun^{1
,
,},
Hu Xinli^{1
,
,
,},
Cui Deshan¹,
Xie Zhaoyu¹,
Jin Xinfeng²,
Xiong Zonghai³

1.
School of Engineering, China University of Geosciences (Wuhan), Wuhan 430074, China
2.
China Machinery TIDI Geotechnical Engineering Co., Ltd., Wuhan 430011, China
3.
School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China

Received Date: 2024-02-22
Available Online: 2025-07-11
Publish Date: 2025-06-25

Abstract

Abstract

The Tianxingzhou carbonate rock belt in Wuhan has developed an exceptionally thick sandstone dolomite formation. To elucidate the genesis and engineering characteristics of this rock formation, a comprehensive study was undertaken employing various methods, including structural surveys, thin section analysis, X-ray diffraction (XRD), X-ray fluorescence (XRF), particle analysis, and saturated uniaxial compressive strength tests. The results indicate that the study area is situated between three faults, and the strata are inverted, suggesting that the region experienced intense compressive stress during the Indosinian period and tensile stress during the Yanshan period. Regional structural features and microscopic observations corroborate this interpretation. Notably, the higher the degree of sandstone, the lower the dolomite mineral content, and the higher the quartz and clay mineral content. The migration and evolution characteristics of major chemical components, such as CaO and MgO, exhibit a negative correlation with the dolomite sandstone process, while components like SiO₂, Al₂O₃ and Fe₂O₃ display a positive correlation. In summary, the primary causes of the dolomite sandstone and its heterogeneous characteristics in the study area can be attributed to three distinct scales: "macroscopic structural dynamics", "microscopic mineral structure composition", and "microscopic chemical composition evolution". The degree of sandstone significantly influences the saturated uniaxialcompressive strength of dolomite. The reduction amplitudes for the "micro-weak", "micro-medium", and "micro-strong" sandstone stages can reach 38.6%, 68.1%, and 90.0%, respectively, exhibiting a power function relationship. Consequently, the standard value of the saturated uniaxial compressive strength for the fully sandstone and extremely broken dolomite in ⑤₁ layer was fitted to be 1.3 MPa, resolving the engineering challenge of obtaining rock mechanics parameters for fully sandstone dolomite through indoor testing of standard rock samples.
- Wuhan Tianxingzhou carbonate rock belt,
- sandy dolomite,
- formation mechanism,
- engineering properties,
- engineering geology

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Formation Mechanism and Engineering Characteristics of Sandy Dolomite in Wuhan Tianxingzhou Carbonate Rock Belt

doi: 10.3799/dqkx.2024.052

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