New results from physical modelling of arc–continent collision in Taiwan: evolutionary model
New results from physical modelling of arc–continent collision in Taiwan: evolutionary model
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DOI：
10.1016/s0040-1951(00)00273-0
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发表时间：
2001-04
期刊：
影响因子：
2.9
通讯作者：
A. Chemenda;R. Yang;J. Stephan;E. Konstantinovskaya;Gennady M. Ivanov
中科院分区：
文献类型：
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作者：
A. Chemenda;R. Yang;J. Stephan;E. Konstantinovskaya;Gennady M. Ivanov
地质资料分析和台湾弧陆碰撞的二维和三维实验模拟结果表明，这一过程主要经历了以下几个阶段：(1)约6 ~ 7ma以来，中国大陆边缘俯冲地壳在菲律宾海板块（PSP）前缘（增生棱镜）下的断裂和增厚；(2)约5Ma前中国边缘俯冲地壳片的隆升（挤压）掘出和中央山脉的起始；(3)吕宋弧/弧前在强烈的水平挤压作用下发生弯曲屈曲（沉降），并受到中央山脉生长和掘出的物质的沉积充填；(4)沿西向纵向谷断裂向弧下倾和弧前闭合的PSP破坏；(5)台湾北部已经发生并向南扩散的大陆俯冲逆转和停止。向南传播的碰撞不是静止的。目前在台湾南部和南部近海发生的初始碰撞并不遵循与台湾中部和北部相同的（如上所述）演变。碰撞在时间和空间上的演变应在一个三维模型的框架内考虑，其中PSP破裂在台湾中北部酝酿了很长时间，经历了多个演化阶段。一旦发生，断裂（纵谷断层）迅速向南传播进入该区域，该区域没有经历破裂前的演化。断裂锋目前位于21°30′n附近。
Both the analysis of the geological data and the results from 2D and 3D experimental modelling of arc–continent collision in Taiwan reveal the following major stages in this process: (1) failure and thickening of the subducting crust of the Chinese continental margin under the frontal part (accretionary prism) of the Philippine Sea Plate (PSP) since ca. 6–7Ma; (2) uplift (squeezing) and exhumation of the subducted crustal slice of the Chinese margin and initiation of the Central Range about 5Ma ago; (3) flexural buckling (subsidence) of the Luzon arc/fore-arc under strong horizontal compression and sedimentary infilling of this area by the material shed from the growing and exhuming Central Range; (4) failure of the PSP along the west-vergent Longitudinal Valley Fault dipping beneath the arc and closure of the fore-arc; (5) subduction reversal and stoppage of continental subduction which has already occurred in northern Taiwan and propagates to the south. The southward propagation of the collision is not stationary. Currently occurring initial collision in southern Taiwan and offshore to the south does not follow the same (described above) evolution as in central and northern Taiwan. The evolution of the collision in time and space should be considered in the framework of a 3D model where the PSP rupture is preparing in the central and northern Taiwan during a long time, passing through a number of evolutionary stages. Once it has occurred, the rupture (Longitudinal Valley Fault) rapidly propagates to the south into the domain, which did not undergo the pre-rupture evolution. The rupture front is currently located near 21°30′N.