Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2000095117 |
Thermogenic carbon release from the Central Atlantic magmatic province caused major end-Triassic carbon cycle perturbations | |
Heimdal, Thea H.; Jones, Morgan T.; Svensen, Henrik. H. | |
2020-05-18 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:22页码:11968-11980 |
文章类型 | Article |
语种 | 英语 |
国家 | Norway |
英文摘要 | The Central Atlantic magmatic province (CAMP), the end-Triassic mass extinction (ETE), and associated major carbon cycle perturbations occurred synchronously around the Triassic-Jurassic (T-J) boundary (201 Ma). Negative carbon isotope excursions (CIEs) recorded in marine and terrestrial sediments attest to the input of isotopically light carbon, although the carbon sources remain debated. Here, we explore the effects of mantle-derived and thermogenic carbon released from the emplacement of CAMP using the long-term ocean-atmosphere-sediment carbon cycle reservoir (LOSCAR) model. We have tested a detailed emission scenario grounded by numerous complementary boundary conditions, aiming to model the full extent of the carbon cycle perturbations around the T-J boundary. These include three negative CIEs (i.e., Marshi/Precursor, Spelae/Initial, Tilmanni/Main) with sharp positive CIEs in between. We show that a total of similar to 24,000 Gt C (including similar to 12,000 Gt thermogenic C) replicates the proxy data. These results indicate that thermogenic carbon generated from the contact aureoles around CAMP sills represents a credible source for the negative CIEs. An extremely isotopically depleted carbon source, such as marine methane clathrates, is therefore not required. Furthermore, we also find that significant organic carbon burial, in addition to silicate weathering, is necessary to account for the positive delta C-13 intervals following the negative CIEs. |
英文关键词 | Central Atlantic magmatic province end-Triassic extinction C cycle perturbations C cycle modeling |
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:000538147800023 |
WOS关键词 | ADVANCED DVORAK TECHNIQUE ; TROPICAL CYCLONES ; CLIMATE-CHANGE ; INTENSITY ; VARIABILITY ; REANALYSIS ; IMPACT |
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/267665 |
专题 | 地球科学 |
作者单位 | Univ Oslo, Ctr Earth Evolut & Dynam, NO-0315 Oslo, Norway |
推荐引用方式 GB/T 7714 | Heimdal, Thea H.,Jones, Morgan T.,Svensen, Henrik. H.. Thermogenic carbon release from the Central Atlantic magmatic province caused major end-Triassic carbon cycle perturbations[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(22):11968-11980. |
APA | Heimdal, Thea H.,Jones, Morgan T.,&Svensen, Henrik. H..(2020).Thermogenic carbon release from the Central Atlantic magmatic province caused major end-Triassic carbon cycle perturbations.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(22),11968-11980. |
MLA | Heimdal, Thea H.,et al."Thermogenic carbon release from the Central Atlantic magmatic province caused major end-Triassic carbon cycle perturbations".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.22(2020):11968-11980. |
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