- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | DENG Ronggui, ZHONG Zhibin, WANG Wenpo, WANG Yuanyuan, ZHANG Jin, LIU Yuancheng. Characteristics and Significance of New Geological Tectonic Activities in Niba Mountain Fault Zone[J]. Journal of Southwest Jiaotong University, 2024, 59(6): 1457-1468. doi: 10.3969/j.issn.0258-2724.20220376
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New geological phenomena have been found in the structural geological mapping of Niba Mountain tunnel field of Ya’an to Xichang section of Beijing−Kunming Expressway. To demonstrate the nature of the Niba Mountain fault zone and new tectonic phenomena of regional geological tectonic significance, using quartz particle morphology scan, geological mechanics and rockmass mechanics theory and numerical simulation analysis method, first elaborated the area of Niba Mountain tunnel engineering geological environment and the new tectonic phenomena, and then discusses the Niba Mountain fault zone boundary faults and tectonic activity, Secondly, the regional geological tectonic significance of the neotectonic phenomenon is discussed. Finally, the existence of the neotectonic phenomenon and the rationality of the evidence of the regional tectonic new framework are demonstrated by numerical simulation analysis. The results show that: 1) the Niba Mountain fault zone has obvious neotectonic activity characteristics; 2) the Niba Mountain fault zone to which the new tectonic deformation phenomenon belongs has genetic homology with the Xianshuihe active fault zone in the “Y” shaped active tectonic zone in western Sichuan, which is the southeast extension of the Xianshuihe fault zone; 3) the Niba Mountain fault zone and its southeastern extension fault (Ebian−Mabian−Leibo segment) and the “Y” shaped active tectonic zone in western Sichuan constitute the original “X” type tectonic model, and have the conditions for the breeding of moderate and strong earthquake activities.
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