【摘要】 麦哲伦海山链主要由十多座相对独立的平顶海山组成,呈北西向展布于太平洋海山密集区。结合前人对麦哲伦海山链形成和漂移的认识,从板块运动和几何学角度出发采用backtracking和hot-spotting海山追踪方法对该区海山的起源与形成进行了研究,结果表明,麦哲伦海山链是多热点成因的板内火山和板块构造运动共同作用的产物,最初于白垩纪期间由法属玻利尼西亚热点群西侧呈北北西向排列的热点活动产生,继而受到板块运动与区内近南北向和北北东向两组断裂及其热活化等的改造作用,最后形成了现今看到的平顶海山。更多还原

【Abstract】 The Magellan seamount trail includes tens of isolated guyots trending EW.A backtracking method and a hot-spotting method were used to trace the Magellan seamount trail from the movement of a plate and its geometry based on previous studies in this region.The result shows that the Magellan seamount trail is the collective products of intraplate volcanism originating from multiple hot spots and plate tectogenesis.The Magellan seamount trail is derived from the present French Polynesian hot spots trending NNW during the Cretaceous.They are also affected by the activity of two fracture zones,which trend SN and NNW,and thermal activity with the movement of the plate.Finally the present Magellan seamount trail is formed.更多还原