期刊
JOURNAL OF ASIAN EARTH SCIENCES
卷 191, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jseaes.2019.104218
关键词
Ground fissure; North China; Extensional basin; Geologic hazards; Groundwater overmining; Tectonic stress
资金
- Major Program of National Natural Science Foundation of China [41790441, 41272284, 41790442, 41877250, 41807234]
- CMEC Technology Incubation Project [CMEC-KJFH-2018-02]
- Shaanxi Science and Technology Co-ordination Innovation Project [2011KTZB03-02-02]
In this study, 5002 ground fissures in more than 1500 localities across 22 provinces in China are investigated and mapped to reveal their spatial distribution. The distribution of these ground fissures in China exhibits six regular patterns-assemblages in North China, syngenesis in extensional basins, clustering along fault zones, distributing along geomorphic boundaries, developed on the edge of subsidence areas, and clustering in large and mediumsized cities. Combined with regional GPS, numerical simulations, physical model test and In-SAR monitoring, the generative processes of ground fissures are analyzed and discussed in relationship to four mechanisms: (1) deep dynamic tectonism controls on the location of ground fissures, (2) intracontinental dynamic tectonism resulting in ground fissure assemblages, (3) fault stress inducing formation of ground fissures, and (4) groundwater overmining resulting in the reactivation and expansion of ground fissures. The geological environment is thus responsible for the establishment and appearance of ground fissure. More importantly, ground fissure propagation in China is the result of the synergistic effects of internal geological dynamic (including in deep tectonism, intracontinental tectoniim, and fault movement) coupled with anthropomorphic stress. This genetic model can be summarized as one that is tectonically controlled, stress -driven, and affected by regional hydrodynamic.
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