Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1614506114 |
Tectonic controls on the long-term carbon isotope mass balance | |
Shields, Graham A.1; Mills, Benjamin J. W.2 | |
2017-04-25 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:17页码:4318-4323 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | The long-term, steady-state marine carbon isotope record reflects changes to the proportional burial rate of organic carbon relative to total carbon on a global scale. For this reason, times of high delta C-13 are conventionally interpreted to be oxygenation events caused by excess organic burial. Here we show that the carbon isotope mass balance is also significantly affected by tectonic uplift and erosion via changes to the inorganic carbon cycle that are independent of changes to the isotopic composition of carbon input. This view is supported by inverse covariance between delta C-13 and a range of uplift proxies, including seawater Sr-87/Sr-86, which demonstrates how erosional forcing of carbonate weathering outweighs that of organic burial on geological timescales. A model of the long-term carbon cycle shows that increases in delta C-13 need not be associated with increased organic burial and that alternative tectonic drivers (erosion, outgassing) provide testable and plausible explanations for sustained deviations from the long-term delta C-13 mean. Our approach emphasizes the commonly overlooked difference between how net and gross carbon fluxes affect the long-term carbon isotope mass balance, and may lead to reassessment of the role that the delta C-13 record plays in reconstructing the oxygenation of earth's surface environment. |
英文关键词 | carbon isotopes mass balance tectonics carbonate weathering long-term carbon cycle |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399995600037 |
WOS关键词 | ATMOSPHERIC OXYGEN ; MODEL ; RISE ; CO2 ; TRIGGER ; SULFUR ; CYCLES ; RECORD ; OCEAN ; O-2 |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
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/204694 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.UCL, Dept Earth Sci, London WC1E 6BT, England; 2.Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England |
推荐引用方式 GB/T 7714 | Shields, Graham A.,Mills, Benjamin J. W.. Tectonic controls on the long-term carbon isotope mass balance[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(17):4318-4323. |
APA | Shields, Graham A.,&Mills, Benjamin J. W..(2017).Tectonic controls on the long-term carbon isotope mass balance.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(17),4318-4323. |
MLA | Shields, Graham A.,et al."Tectonic controls on the long-term carbon isotope mass balance".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.17(2017):4318-4323. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论