ORIGINAL RESEARCH article
Front. Earth Sci.
Sec. Geohazards and Georisks
Volume 13 - 2025 | doi: 10.3389/feart.2025.1618308
This article is part of the Research TopicNatural Disaster Prediction Based on Experimental and Numerical MethodsView all 15 articles
Assumptions about the Dynamics Sources and Mechanisms of Plate Tectonic Activities
Provisionally accepted
- 1College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu, Sichuan Province, China
- 2Sichuan Communication Surveying and Design Institute CO., LTD, Chengdu City, Sichuan, China
- 3School of Emergency Management, Xihua University, Chengdu, China
- 4Shaanxi Xingtong Engineering Consulting Co., LTD, Xi’an, Shan xi, Xi'an, China
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The problem of the driving source and power mechanism of plate motion remains a major scientific issue in urgent need of resolution. Based on the isostatic hypothesis model proposed by G.B. Airy in 1855, this study puts forward the crustal isostatic model based on the self-weight stress field and the assumption of the dynamic source of plate movement. It is believed that the plate movement in the crustal layer is the result of deep magma activities, and the mode of activity is mainly laminar flow. In terms of the dynamic mechanism, the assumption of the magma flow mechanism is proposed. It is believed that the magma flow is driven by the magma density gradient, and the magma density varies with depth. By using the model and assumptions in this paper, the two mechanical mechanisms of surface rupture and block movement are analyzed. Taking the Chengdu block in Western Sichuan as an example, the correlation between magma flow, regional stress field, large-scale displacement and tectonic activities is analyzed. The analysis results are in good agreement with the actual situation, effectively explaining the morphology and activities of typical fault activity structures in this region. The research results are helpful for people to further understand the tectonic activities of the Earth.
Keywords: Plate activity, Isostasy hypothesis model, dynamic mechanism, Crustal thickness, Density gradient
Received: 25 Apr 2025; Accepted: 29 May 2025.
Copyright: © 2025 Chen, Li, Gao and Chen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Ziyun Chen, College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu, 610059, Sichuan Province, China
Tianbin Li, College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu, 610059, Sichuan Province, China
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