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DOI | 10.1038/s41561-019-0492-6 |
Great Oxidation and Lomagundi events linked by deep cycling and enhanced degassing of carbon | |
Eguchi, James1,2; Seales, Johnny1; Dasgupta, Rajdeep1 | |
2020 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2020 |
卷号 | 13期号:1页码:71-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | For approximately the first 2 billion years of the Earth's history, atmospheric oxygen levels were extremely low. It was not until at least half a billion years after the evolution of oxygenic photosynthesis, perhaps as early as 3 billion years ago, that oxygen rose to appreciable levels during the Great Oxidation Event. Shortly after, marine carbonates underwent a large positive spike in carbon isotope ratios known as the Lomagundi event. The mechanisms responsible for the Great Oxidation and Lomagundi events remain debated. Using a carbon-oxygen box model that tracks the Earth's surface and interior carbon fluxes and reservoirs, while also tracking carbon isotopes and atmospheric oxygen levels, we demonstrate that about 2.5 billion years ago a tectonic transition that resulted in increased volcanic CO2 emissions could have led to increased deposition of both carbonates and organic carbon (organic C) via enhanced weathering and nutrient delivery to oceans. Increased burial of carbonates and organic C would have allowed the accumulation of atmospheric oxygen while also increasing the delivery of carbon to subduction zones. Coupled with preferential release of carbonates at arc volcanoes and deep recycling of organic C to ocean island volcanoes, we find that such a tectonic transition can simultaneously explain the Great Oxidation and Lomagundi events without any change in the fraction of carbon buried as organic C relative to carbonate, which is often invoked to explain carbon isotope excursions. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000511618700017 |
WOS关键词 | SUBDUCTED OCEANIC-CRUST ; ISOTOPE CONSTRAINTS ; SUBMARINE LAVAS ; PLATE-TECTONICS ; RISE ; MANTLE ; CO2 ; EVOLUTION ; RECORD ; OXYGEN |
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/280379 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Rice Univ, Dept Earth Environm & Planetary Sci, Houston, TX 77005 USA; 2.Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA 92521 USA |
推荐引用方式 GB/T 7714 | Eguchi, James,Seales, Johnny,Dasgupta, Rajdeep. Great Oxidation and Lomagundi events linked by deep cycling and enhanced degassing of carbon[J]. NATURE GEOSCIENCE,2020,13(1):71-+. |
APA | Eguchi, James,Seales, Johnny,&Dasgupta, Rajdeep.(2020).Great Oxidation and Lomagundi events linked by deep cycling and enhanced degassing of carbon.NATURE GEOSCIENCE,13(1),71-+. |
MLA | Eguchi, James,et al."Great Oxidation and Lomagundi events linked by deep cycling and enhanced degassing of carbon".NATURE GEOSCIENCE 13.1(2020):71-+. |
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