Significance of a highly refractory source during subduction initiation to form the Izu-Bonin-Mariana Arc

• 作者: Scott A.Whattam Robert J.Stern
• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2022,（2）
• 所属期刊栏目: RESEARCH HIGHLIGHTS
• 页码范围: 119-121
• 页数: 3页
• 语种: 英文

摘要

The ascendent theory that unifies the Earth Sciences is Plate Tectonics,a regime which is unique to Earth.Other convectively active,solid silicate bodies of our Solar System (Venus,Mars,and Io) are encased in a single deforming "lid";on these,multiple plates and hence plate motions do not exist [1].As Earth's tectonic plates are driven by the sinking of old and cold oceanic lithosphere at subduction zones,understanding how new subduction zones originate is vital for a complete plate tectonic theory.Proposed mechanisms of subduction initiation (SI) are controversial but can be either spontaneous,i.e.,caused by forces originating at the SI site,or induced by ongoing plate motions [2].