The Initiation of Early Palaeozoic Subduction in Eastern Australia and North America: causes and effects

三十多年前确定的俯冲是寒冷、密集的海洋岩石圈向地幔的回归，是板块构造范式的关键动力要素之一。正是这个过程导致了“环太平洋火山带”的形成。它是许多关键地质过程的根本原因，是地球上一些规模最大的地理特征的主要控制因素，包括深海海沟和山脉。利用澳大利亚东部和加拿大大西洋边缘的寒武纪的重要记录，我们将研究俯冲最早阶段的原因和影响，因为它首先在西太平洋和5亿年前的前大西洋发展起来。

Identified thirty or more years ago subduction is the return of cold, dense, oceanic lithosphere to the mantle and is one of the key dynamic elements of the plate tectonic paradigm. It is this process that is responsible for the 'Pacific Ring of Fire'. It is the root cause of many key geological processes and is a primary control of some of the earth's largest-scale physiographic features, including deep-sea trenches and mountain ranges. Using the important record of Cambrian in eastern Australia and in the comparable Canadian Atlantic margin, we will look at the causes and impact of the earliest stages of subduction as it first developed in the western Pacific and pre-cursor Atlantic 500 million years ago.