Process of Rifting and Collision along Plate Margins of the Qinling Orogenic Belt and Its Geodynamics
Process of Rifting and Collision along Plate Margins of the Qinling Orogenic Belt and Its Geodynamics
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DOI：
10.1111/j.1755-6724.1999.tb00836.x
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发表时间：
1999-09
期刊：
影响因子：
--
通讯作者：
Liu Shao-feng;Zhang Guowei
中科院分区：
文献类型：
--
作者：
Liu Shao-feng;Zhang Guowei
秦岭造山带经历了复杂的裂陷与碰撞过程，表现为1大洋伸展与板缘裂陷并存，2前缘洋壳俯冲与板块后缘伸展并存。这就形成了盆山格局，其特征是由洋盆分隔的板块与由边缘地区的裂谷海槽划分的大陆块体共存，俯冲造山带与洋张并存。总体而言，华北板块与扬子板块之间的板块边缘地带自北向南不断发生裂谷作用，而裂谷作用后的微板块则不断向北增生。这一特殊的造山过程可能是由北向南分别发生在商丹缝合带和勉略缝合带的两次深部地幔动力学调整和地幔柱活动所控制的。
The Qinling orogenic belt underwent complicated processes of rifting and collision, as shown by the coexistence of 1 ocean extension and plate margin rifting and 2 subduction of the frontal oceanic crust and extension of the rear plate margin. These resulted in a basin‐mountain framework characterized by the coexistence of plates separated by the ocean basin and continental blocks demarcated by the rifting sea trough in the marginal region and the coexistence of subduction orogeny and ocean extension. Generally speaking, the plate marginal area between the North China plate and Yangtze plate continually rifted from north to south and the rifted micro‐plates continually accreted northwards. This especial orogenic process was probably controlled by two events of deep mantle geodynamic adjustment and mantle plume activities, which occurred in the Shangdan suture belt and Mianlüe suture belt from north to south respectively.