Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1073/pnas.1909165116 |
| Subglacial meltwater supported aerobic marine habitats during Snowball Earth | |
| Lechte, Maxwell A.1,2; Wallace, Malcolm W.1; Hood, Ashleigh van Smeerdijk1; Li, Weiqiang3; Jiang, Ganqing4; Halverson, Galen P.2; Asael, Dan5; McColl, Stephanie L.1; Planavsky, Noah J.5 | |
| 通讯作者 | Lechte, Maxwell A. |
| 来源期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
 |
| ISSN | 0027-8424 |
| 出版年 | 2019 |
| 卷号 | 116期号:51页码:25478-25483 |
| 英文摘要 | The Earth's most severe ice ages interrupted a crucial interval in eukaryotic evolution with widespread ice coverage during the Cryogenian Period (720 to 635 Ma). Aerobic eukaryotes must have survived the Snowball Earth glaciations, requiring the persistence of oxygenated marine habitats, yet evidence for these environments is lacking. We examine iron formations within globally distributed Cryogenian glacial successions to reconstruct the redox state of the synglacial oceans. Iron isotope ratios and cerium anomalies from a range of glaciomarine environments reveal pervasive anoxia in the ice-covered oceans but increasing oxidation with proximity to the ice shelf grounding line. We propose that the outwash of subglacial meltwater supplied oxygen to the synglacial oceans, creating glaciomarine oxygen oases. The confluence of oxygen-rich meltwater and iron-rich seawater may have provided sufficient energy to sustain chemosynthetic communities. These processes could have supplied the requisite oxygen and organic carbon source for the survival of early animals and other eukaryotic heterotrophs through these extreme glaciations. |
| 英文关键词 | oxygenation glaciation Snowball Earth iron formation Fe isotopes |
| 类型 | Article |
| 语种 | 英语 |
| 国家 | Australia ; Canada ; Peoples R China ; USA |
| 开放获取类型 | Green Published, Bronze |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000503281500025 |
| WOS关键词 | KINGSTON PEAK FORMATION ; IRON-FORMATION ; ICE SHELF ; FE ISOTOPE ; DYNAMICS ; CONSTRAINTS ; SPONGES ; ORIGIN ; RECORD ; SHEET |
| WOS类目 | Multidisciplinary Sciences |
| WOS研究方向 | Science & Technology - Other Topics |
| EI主题词 | 2019-12-17 |
| 来源机构 | 南京大学 |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/311820 |
| 作者单位 | 1.Univ Melbourne, Sch Earth Sci, Parkville, Vic 3010, Australia; 2.McGill Univ, Dept Earth & Planetary Sci, Montreal, PQ H3A 0E8, Canada; 3.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210093, Jiangsu, Peoples R China; 4.Univ Nevada, Dept Geosci, Las Vegas, NV 89154 USA; 5.Yale Univ, Dept Geol & Geophys, New Haven, CT 06511 USA |
| 推荐引用方式 GB/T 7714 | Lechte, Maxwell A.,Wallace, Malcolm W.,Hood, Ashleigh van Smeerdijk,et al. Subglacial meltwater supported aerobic marine habitats during Snowball Earth[J]. 南京大学,2019,116(51):25478-25483. |
| APA | Lechte, Maxwell A..,Wallace, Malcolm W..,Hood, Ashleigh van Smeerdijk.,Li, Weiqiang.,Jiang, Ganqing.,...&Planavsky, Noah J..(2019).Subglacial meltwater supported aerobic marine habitats during Snowball Earth.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,116(51),25478-25483. |
| MLA | Lechte, Maxwell A.,et al."Subglacial meltwater supported aerobic marine habitats during Snowball Earth".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 116.51(2019):25478-25483. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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