西太平洋边缘构造特征及其演化

发布时间：2018-05-04 00:16

本文选题：西太平洋边缘构造 + 新生代　；参考：《中国地质》2017年06期

【摘要】：西太平洋边缘构造带是地球上规模最大最复杂的板块边界,以台湾和马鲁古海为界,自北往南大致可以分为3段。北段是典型的沟-弧-盆体系,千岛海盆、日本海盆及冲绳海槽均为典型的弧后扩张盆地。中段菲律宾岛弧构造带为双向俯冲带,构造复杂,新生代经历大的位移和重组,使得欧亚大陆边缘的南海、苏禄海和苏拉威西海成因存在很大的争议。南段新几内亚—所罗门构造带是太平洋板块、印度—澳大利亚及欧亚板块共同作用的结果,既有不同阶段的俯冲、碰撞,也有大规模的走滑与弧后的扩张,其间既有新扩张的海盆,又有正在俯冲消亡的海盆。台湾岛处于枢纽部位,欧亚板块在此被撕裂,南部欧亚大陆边缘南海洋壳沿马尼拉海沟俯冲于菲律宾岛弧之下,而北部菲律宾海洋壳沿琉球海沟俯冲欧亚大陆之下。马鲁古海是西太平洋板块边界又一转折点,马鲁古海板块往东下插于哈马黑拉之下,往西下插于桑义赫弧,形成反U形双向俯冲汇聚带,其洋壳板块已基本全部消失,致使哈马黑拉弧与桑义赫弧形成弧-弧碰撞。
[Abstract]:The western Pacific marginal tectonic belt is the largest and most complex plate boundary on the earth. It is divided into three sections from north to south with Taiwan and Maluku Sea as the boundary. The northern segment is a typical trench-arc basin system, and the Kuril Island basin, Japanese basin and Okinawa trough are all typical back-arc extensional basins. The central Philippine island arc tectonic belt is a bidirectional subduction zone with complicated structure and great displacement and reorganization in the Cenozoic, which makes the origin of the South China Sea, Sulu Sea and Sulawesi Sea on the Eurasian margin very controversial. The New Guinean-Solomon tectonic belt in the southern segment is the result of the interaction of the Pacific plate, the Indo-Australian plate and the Eurasian plate, with both subduction and collision at different stages, and large-scale strike-slip and back-arc expansion. In the meantime, there are both newly expanded basins and subduction basins. The southern oceanic crust of the southern Eurasia margin subducts beneath the Philippine island arc along the Manila trench, while the northern Philippine oceanic crust subducts under the Eurasian continent along the Ryukyu trench. The Marugu Sea is another turning point in the boundary of the western Pacific plate. The Marugu Sea plate runs eastward under Hammara and westward at the Sanyi Arc, forming an anti-U-shaped two-way subduction convergence zone, in which the oceanic crust plate has basically disappeared. As a result of the Hammarheira Arc and Sainih Arc-arc-arc collision.
【作者单位】：广州海洋地质调查局/国土资源部海底矿产资源重点实验室;
【基金】：中国地质调查局项目(DD20160138)资助~~
【分类号】：P736.1

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