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

澳大利亚东部和北美早古生代俯冲的开始：原因和影响

• 批准号: DP0773913
• 负责人: Em/Prof John Foden
• 金额: $ 12.47万
• 依托单位: The University of Adelaide
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2007
• 资助国家: 澳大利亚
• 起止时间: 2007-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP0773913
• 关键词: Initiation; Early; Palaeozoic; Subduction; Eastern

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.

30多年前发现的俯冲作用是冰冷、致密的大洋岩石圈回到地幔的过程，是板块构造范式的关键动力要素之一。正是这一过程造就了“太平洋火环”。它是许多关键地质过程的根本原因，也是地球上一些最大规模的地形地貌的主要控制因素，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寒武纪的重要记录，我们将研究最早俯冲阶段的原因和影响，因为它最初是在5亿年前的西太平洋和光标前的大西洋发展起来的。