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DOI | 10.1029/2019GL083316 |
Redox Chemistry and Molybdenum Burial in a Mesoproterozoic Lake | |
Rico, K. I.1; Sheldon, N. D.1; Gallagher, T. M.1,2; Chappaz, A.3 | |
2019-06-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:11页码:5871-5878 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | While marine sediments have been used to constrain a history of redox chemistry throughout the Precambrian, far fewer data have been generated from lakes. With major biological innovations thought to have occurred in Proterozoic lakes, understanding their chemistry is critical for understanding the evolution of eukaryotic life. We use sediment geochemistry to characterize the redox conditions of the Nonesuch Formation (similar to 1.1 Ga) and a modern analogue for the Proterozoic: the Middle Island Sinkhole in Lake Huron (USA). Iron speciation, Mo contents, and Mo-U covariation demonstrate oxic and anoxic-not euxinic-environments, with no clear indicators of enhanced biological productivity in the Nonesuch Formation. Moderate Mo enrichments observed in the Nonesuch Formation are not attributed to euxinia, but instead to an authigenic particulate shuttle. We suggest that the Fe and Mo sediment geochemistry of these lacustrine systems reflect only local water column and sediment burial conditions and not atmospheric oxygenation. |
英文关键词 | redox molybdenum Proterozoic biogeochemistry |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000477616200027 |
WOS关键词 | COPPER HARBOR CONGLOMERATE ; AMERICAN MIDCONTINENT RIFT ; WESTERN INTERIOR SEAWAY ; TERRESTRIAL ENVIRONMENT ; THERMAL MATURITY ; IRON ; SPECIATION ; SEDIMENTS ; SINKHOLE ; WATERS |
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/184091 |
专题 | 气候变化 |
作者单位 | 1.Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI 48109 USA; 2.Univ Texas Austin, Jackson Sch Geosci, Austin, TX USA; 3.Cent Michigan Univ, Dept Earth & Atmospher Sci, Mt Pleasant, MI 48859 USA |
推荐引用方式 GB/T 7714 | Rico, K. I.,Sheldon, N. D.,Gallagher, T. M.,et al. Redox Chemistry and Molybdenum Burial in a Mesoproterozoic Lake[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(11):5871-5878. |
APA | Rico, K. I.,Sheldon, N. D.,Gallagher, T. M.,&Chappaz, A..(2019).Redox Chemistry and Molybdenum Burial in a Mesoproterozoic Lake.GEOPHYSICAL RESEARCH LETTERS,46(11),5871-5878. |
MLA | Rico, K. I.,et al."Redox Chemistry and Molybdenum Burial in a Mesoproterozoic Lake".GEOPHYSICAL RESEARCH LETTERS 46.11(2019):5871-5878. |
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