GSTDTAP  > 地球科学
DOI10.1073/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
ISSN0027-8424
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
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被引频次:75[WOS]   [WOS记录]     [WOS相关记录]
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
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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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