Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1705378114 |
Mercury evidence for pulsed volcanism during the end-Triassic mass extinction | |
Percival, Lawrence M. E.1,2,3,5; Ruhl, Micha1; Hesselbo, Stephen P.; Jenkyns, Hugh C.1; Mather, Tamsin A.1; Whiteside, Jessica H.4 | |
2017-07-25 | |
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:30页码:7929-7934 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Switzerland |
英文摘要 | The Central Atlantic Magmatic Province (CAMP) has long been proposed as having a causal relationship with the end-Triassic extinction event (similar to 201.5 Ma). In North America and northern Africa, CAMP is preserved as multiple basaltic units interbedded with uppermost Triassic to lowermost Jurassic sediments. However, it has been unclear whether this apparent pulsing was a local feature, or if pulses in the intensity of CAMP volcanism characterized the emplacement of the province as a whole. Here, six geographically widespread Triassic-Jurassic records, representing varied paleoenvironments, are analyzed for mercury (Hg) concentrations and Hg/total organic carbon (Hg/TOC) ratios. Volcanism is a major source of mercury to the modern environment. Clear increases in Hg and Hg/TOC are observed at the end-Triassic extinction horizon, confirming that a volcanically induced global Hg cycle perturbation occurred at that time. The established correlation between the extinction horizon and lowest CAMP basalts allows this sedimentary Hg excursion to be stratigraphically tied to a specific flood basalt unit, strengthening the case for volcanic Hg as the driver of sedimentary Hg/TOC spikes. Additional Hg/TOC peaks are also documented between the extinction horizon and the Triassic-Jurassic boundary (separated by similar to 200 ky), supporting pulsatory intensity of CAMP volcanism across the entire province and providing direct evidence for episodic volatile release during the initial stages of CAMP emplacement. Pulsatory volcanism, and associated perturbations in the ocean-atmosphere system, likely had profound implications for the rate and magnitude of the end-Triassic mass extinction and subsequent biotic recovery. |
英文关键词 | mercury end-Triassic extinction Central Atlantic Magmatic Province |
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:000406189900059 |
WOS关键词 | ATLANTIC MAGMATIC PROVINCE ; FLOOD-BASALT ERUPTIONS ; ST-AUDRIES BAY ; LARGE IGNEOUS PROVINCE ; JURASSIC BOUNDARY ; CARBON-CYCLE ; TRIASSIC/JURASSIC BOUNDARY ; EVENT ; UK ; EMPLACEMENT |
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/204752 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Oxford, Dept Earth Sci, Oxford OX1 3AN, England; 2.Univ Exeter, Camborne Sch Mines, Penryn TR10 9FE, England; 3.Univ Exeter, Environm & Sustainabil Inst, Penryn TR10 9FE, England; 4.Univ Southampton, Natl Oceanog Ctr Southampton, Ocean & Earth Sci, Southampton SO14 3ZH, Hants, England; 5.Univ Lausanne, Inst Earth Sci, Geopolis, CH-1015 Lausanne, Switzerland |
推荐引用方式 GB/T 7714 | Percival, Lawrence M. E.,Ruhl, Micha,Hesselbo, Stephen P.,et al. Mercury evidence for pulsed volcanism during the end-Triassic mass extinction[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(30):7929-7934. |
APA | Percival, Lawrence M. E.,Ruhl, Micha,Hesselbo, Stephen P.,Jenkyns, Hugh C.,Mather, Tamsin A.,&Whiteside, Jessica H..(2017).Mercury evidence for pulsed volcanism during the end-Triassic mass extinction.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(30),7929-7934. |
MLA | Percival, Lawrence M. E.,et al."Mercury evidence for pulsed volcanism during the end-Triassic mass extinction".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.30(2017):7929-7934. |
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