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DOI | 10.1073/pnas.1611086114 |
Role of degassing of the Noril'sk nickel deposits in the Permian-Triassic mass extinction event | |
Le Vaillant, Margaux1; Barnes, Stephen J.1; Mungall, James E.2; Mungall, Emma L.3 | |
2017-03-07 | |
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 | 2017 |
卷号 | 114期号:10页码:2485-2490 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; Canada |
英文摘要 | The largest mass extinction event in Earth's history marks the boundary between the Permian and Triassic Periods at circa 252 Ma and has been linked with the eruption of the basaltic Siberian Traps large igneous province (SLIP). One of the kill mechanisms that has been suggested is a biogenic methane burst triggered by the release of vast amounts of nickel into the atmosphere. A proposed Ni source lies within the huge Noril'sk nickel ore deposits, which formed in magmatic conduits widely believed to have fed the eruption of the SLIP basalts. However, nickel is a nonvolatile element, assumed to be largely sequestered at depth in dense sulfide liquids that formed the orebodies, preventing its release into the atmosphere and oceans. Flotation of sulfide liquid droplets by surface attachment to gas bubbles has been suggested as a mechanism to overcome this problem and allow introduction of Ni into the atmosphere during eruption of the SLIP lavas. Here we use 2D and 3D X-ray imagery on Noril'sk nickel sulfide, combined with simple thermodynamic models, to show that the Noril'sk ores were degassing while they were forming. Consequent "bubble riding"by sulfide droplets, followed by degassing of the shallow, sulfide-saturated, and exceptionally volatile and Cl-rich SLIP lavas, permitted a massive release of nickel-rich volcanic gas and subsequent global dispersal of nickel released from this gas as aerosol particles. |
英文关键词 | Noril' sk Ni-Cu-PGE deposits Permian-Triassic mass extinction sulfide flotation |
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:000395511400049 |
WOS关键词 | GAS ; VOLCANO ; NI ; CU ; EQUILIBRIA ; ELEMENTS ; SULFUR ; LIQUID ; MAGMAS |
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/204672 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Commonwealth Sci & Ind Res Org, Mineral Resources, Kensington, WA 6151, Australia; 2.Univ Toronto, Dept Earth Sci, Toronto, ON M5S 3B1, Canada; 3.Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada |
推荐引用方式 GB/T 7714 | Le Vaillant, Margaux,Barnes, Stephen J.,Mungall, James E.,et al. Role of degassing of the Noril'sk nickel deposits in the Permian-Triassic mass extinction event[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(10):2485-2490. |
APA | Le Vaillant, Margaux,Barnes, Stephen J.,Mungall, James E.,&Mungall, Emma L..(2017).Role of degassing of the Noril'sk nickel deposits in the Permian-Triassic mass extinction event.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(10),2485-2490. |
MLA | Le Vaillant, Margaux,et al."Role of degassing of the Noril'sk nickel deposits in the Permian-Triassic mass extinction event".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.10(2017):2485-2490. |
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