Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41561-017-0002-7 |
An essential role for continental rifts and lithosphere in the deep carbon cycle | |
Foley, Stephen F.1; Fischer, Tobias P.2 | |
2017-12-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; USA |
英文摘要 | The continental lithosphere is a vast store for carbon. The carbon has been added and reactivated by episodic freezing and re-melting throughout geological history. Carbon remobilization can lead to significant variations in CO2 outgassing and release in the form of magmas from the continental lithosphere over geological timescales. Here we use calculations of continental lithospheric carbon storage, enrichment and remobilization to demonstrate that the role for continental lithosphere and rifts in Earth's deep carbon budget has been severely underestimated. We estimate that cratonic lithosphere, which formed 2 to 3 billion years ago, originally contained about 0.25 Mt C km(-3). A further 14 to 28 Mt C km(-3) is added over time from the convecting mantle and about 43 Mt C km-3 is added by plume activity. Re-melting focuses carbon beneath rifts, creating zones with about 150 to 240 Mt C km(-3), explaining the well-known association of carbonate-rich magmatic rocks with rifts. Reactivation of these zones can release 28 to 34 Mt of carbon per year for the 40 million year lifetime of a continental rift. During past episodes of supercontinent breakup, the greater abundance of continental rifts could have led to short-term carbon release of at least 142 to 170 Mt of carbon per year, and may have contributed to the high atmospheric CO2 at several times in Earth's history. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416858000009 |
WOS关键词 | MANTLE ; VOLCANO ; CONSTRAINTS ; ALKALINE ; ORIGIN ; MELT ; LAMPROPHYRES ; KIMBERLITES ; EVOLUTION ; GENESIS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34781 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Macquarie Univ, ARC Ctr Excellence Core Crust Fluid Syst, Dept Earth & Planetary Sci, N Ryde, NSW, Australia; 2.Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA |
推荐引用方式 GB/T 7714 | Foley, Stephen F.,Fischer, Tobias P.. An essential role for continental rifts and lithosphere in the deep carbon cycle[J]. NATURE GEOSCIENCE,2017,10(12). |
APA | Foley, Stephen F.,&Fischer, Tobias P..(2017).An essential role for continental rifts and lithosphere in the deep carbon cycle.NATURE GEOSCIENCE,10(12). |
MLA | Foley, Stephen F.,et al."An essential role for continental rifts and lithosphere in the deep carbon cycle".NATURE GEOSCIENCE 10.12(2017). |
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