The Earth's Deep Carbon Cycle

地球深层碳循环

• 批准号: DP140100089
• 负责人: Prof Greg Yaxley
• 金额: $ 23.07万
• 依托单位: The Australian National University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2014
• 资助国家: 澳大利亚
• 起止时间: 2014-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP140100089
• 关键词: Earth; Deep; Carbon; Cycle

The climate change debate has focused scientific attention on Earth’s exogene carbon-cycle. However, Earth has another, much deeper carbon-cycle which is poorly understood. In addition to exerting a profound influence on atmospheric greenhouse gas concentrations over time scales from thousands to billions of years, it is critically important in many processes in the Earth’s deep mantle. The major means by which the deep carbon-cycle is replenished is via subduction of carbonate-bearing oceanic crust. The project proposes a high-pressure experimental and field-based program to understand the fate of this carbonate during its journey from the exosphere, through subduction zones and into the deep mantle.

气候变化的争论使科学界的注意力集中在地球的外生碳循环上。然而，地球还有另一个更深层次的碳循环，人们对此知之甚少。除了在数千年至数十亿年的时间尺度上对大气温室气体浓度产生深远影响外，它在地球深部地幔的许多过程中也至关重要。深部碳循环的主要补充方式是含碳酸盐洋壳的俯冲作用。该项目提出了一个高压实验和基于实地的计划，以了解这种碳酸盐在从外逸层，通过俯冲带进入地幔深处的过程中的命运。