| 1 | Tectonic Characteristics and Emplacement Mechanism of Dayishan Granite in Hunan Province, China显示文摘Dayishan granite, a significant metallogenic-rock body located in Shaoyang-Chenxian tectonomagmatic belt of Hunan Province, was controlled by 'Dayishan-type' fault pattern. Based on the study of tectonic setting and geological features of the grantie, it is concluded that the tectonic system controlling magmatic emplacement is a shear folded-fauted zone which resulted from NW-trending convergent strike-slip faulting. The close relationship between the temporal-spatial distribution, emplacement mechanism of Dayishan granite and the strike-slip faulting is detailed. | Li Xianfu(Wuhan Institute of Chemical Technology, Wuhan 430073)Li Jianwei Fu Zhaoren Li Zijin(Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074) | 1999 | Journal of Earth Science1999，18，4： | 1 |
| 2 | Study on Geomechanical and Physical Models of Necking-Type Slopes显示文摘A simplified geomechanical model was proposed by considering three typical neckingtype slopes;this model lays a foundation for the further investigation of the deformation behaviors of such slopes.Three physical models of necking-type slopes were built according to the geomechanical model with slope evolution stages.Finally,preliminary calculations related to the arching effect in the physical model were conducted.Three evolution stages of necking-type slopes,namely,the initial stage,compression stage,and failure stage,were presented based on the formation and disappearance of the arching effect within the slope.The specific parameters of the geomechanical model were given.In the setup of the tilting test,the failure angle of the necking-type slope model was calculated to be approximately 50°with a large lateral resistance coefficient.The proposed geomechanical model and physical models of necking-type slopes provide guidance for the establishment of geomechanical and physical models of landslides at specific sites. | Kun Fang Huiming Tang Jichen Zhu Zijin Fu Pengju An Bocheng Zhang Chunyan Tang | 2023 | Journal of Earth Science2023，34，3： | 0 |
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