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DOI | 10.1126/science.1199011 |
Atmospheric PCO2 perturbations associated with the central atlantic magmatic province | |
Schaller M.F.; Wright J.D.; Kent D.V. | |
发表日期 | 2011 |
ISSN | 0036-8075 |
起始页码 | 1404 |
结束页码 | 1409 |
卷号 | 331期号:6023 |
英文摘要 | The effects of a large igneous province on the concentration of atmospheric carbon dioxide (PCO2) are mostly unknown. In this study, we estimate PCO2 from stable isotopic values of pedogenic carbonates interbedded with volcanics of the Central Atlantic Magmatic Province (CAMP) in the Newark Basin, eastern North America. We find pre-CAMP PCO2 values of ∼2000 parts per million (ppm), increasing to ∼4400 ppm immediately after the first volcanic unit, followed by a steady decrease toward pre-eruptive levels over the subsequent 300 thousand years, a pattern that is repeated after the second and third flow units. We interpret each PCO2 increase as a direct response to magmatic activity (primary outgassing or contact metamorphism). The systematic decreases in PCO2 after each magmatic episode probably reflect consumption of atmospheric CO2 by weathering of silicates, stimulated by fresh CAMP volcanics. |
英文关键词 | carbon dioxide; carbon dioxide; carbonate; concentration (composition); isotopic analysis; magmatism; perturbation; silicate; stable isotope; volcano; weathering; article; carbon cycle; controlled atmosphere; priority journal; sedimentation rate; volcano; Atlantic Ocean; Atlantic Ocean (Central); Newark Basin; United States |
语种 | 英语 |
来源期刊 | Science |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/245355 |
作者单位 | Department of Earth and Planetary Sciences, Rutgers University, Piscataway, NJ 08854, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, United States |
推荐引用方式 GB/T 7714 | Schaller M.F.,Wright J.D.,Kent D.V.. Atmospheric PCO2 perturbations associated with the central atlantic magmatic province[J],2011,331(6023). |
APA | Schaller M.F.,Wright J.D.,&Kent D.V..(2011).Atmospheric PCO2 perturbations associated with the central atlantic magmatic province.Science,331(6023). |
MLA | Schaller M.F.,et al."Atmospheric PCO2 perturbations associated with the central atlantic magmatic province".Science 331.6023(2011). |
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