Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/NGEO3028 |
A molybdenum-isotope perspective on Phanerozoic deoxygenation events | |
Dickson, Alexander J.1,2 | |
2017-10-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | The expansion and contraction of sulfidic depositional conditions in the oceans can be tracked with the isotopic composition of molybdenum in marine sediments. However, molybdenum-isotope data are often subject to multiple conflicting interpretations. Here I present a compilation of molybdenum-isotope data from three time intervals: the Toarcian Oceanic Anoxic Event about 183 million years ago, Oceanic Anoxic Event 2 about 94 million years ago, and two early Eocene hyperthermal events from 56 to 54 million years ago. A comparison of data from sites located in different hydrographic settings tightly constrains the molybdenum cycle for these intervals, allowing a direct comparison of the expanse of sulfidic conditions in each interval compared to today. Nonetheless, tracing rates of redox change over such rapid climatic events using molybdenum isotopes remains challenging. Future efforts to achieve this goal might be accomplished by analysing specific mineral phases, using complementary redox-sensitive geochemical techniques and by linking isotopic observations with Earth system modelling. Such improvements will make it possible to more fully assess the links between ocean deoxygenation, climatic and oceanographic changes, and biotic turnover. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000412102200007 |
WOS关键词 | MODERN BLACK ; FRACTIONATION ; ADSORPTION ; ANOXIA ; REDOX ; GEOCHEMISTRY ; OXYGENATION ; SEDIMENTS ; DRAWDOWN ; SEAWATER |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/34799 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Oxford, Dept Earth Sci, South Parks Rd, Oxford OX1 3AN, England; 2.Royal Holloway Univ London, Dept Earth Sci, Egham TW20 0EX, Surrey, England |
推荐引用方式 GB/T 7714 | Dickson, Alexander J.. A molybdenum-isotope perspective on Phanerozoic deoxygenation events[J]. NATURE GEOSCIENCE,2017,10(10). |
APA | Dickson, Alexander J..(2017).A molybdenum-isotope perspective on Phanerozoic deoxygenation events.NATURE GEOSCIENCE,10(10). |
MLA | Dickson, Alexander J.."A molybdenum-isotope perspective on Phanerozoic deoxygenation events".NATURE GEOSCIENCE 10.10(2017). |
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