Major shoreline retreat and sediment starvation following Snowball Earth
文献类型：期刊论文
| 作者 | Nordsvan, Adam R.4; Barham, Milo3; Cox, Grant; Kirscher, Uwe2,4; Mitchell, Ross N.1,4 |
| 刊名 | TERRA NOVA
 |
| 出版日期 | 2019-12-01 |
| 卷号 | 31期号:6页码:495-502 |
| ISSN号 | 0954-4879 |
| DOI | 10.1111/ter.12426 |
| 英文摘要 | While cap dolostones are integral to the Snowball Earth hypothesis, the current depositional model does not account for multiple geological observations. Here we propose a model that rationalises palaeomagnetic, sequence-stratigraphic and sedimentological data and supports rapid deglaciation with protracted cap dolostone precipitation. The Snowball Earth hypothesis posits that a runaway ice-albedo can explain the climate paradox of Neoproterozoic glacial deposits occurring at low palaeolatitudes. This scenario invokes volcanic degassing to increase atmospheric greenhouse gases to a critical threshold that overcomes the albedo effect and brings the planet back from the ice-covered state. Once this occurs, Earth should shift rapidly from a snowball to an extreme greenhouse. However, cap dolostone units overlying glacial sediments, typically interpreted as transgressive deposits, exhibit multiple magnetic reversals indicating they accumulated in >10(5) years. By reviewing modern post-glacial systems, sequence stratigraphic concepts and principles of sedimentology, we suggest that cap dolostones are not restricted to the transgression but rather represent sediment starvation following a major landward shoreline migration associated with the demise of Snowball Earth. Thus, the duration in which cap dolostone accumulated is not directly coupled to the timescale of the Snowball Earth deglaciation. |
| WOS关键词 | CAP CARBONATE ; CONTINENTAL-MARGIN ; LATE PLEISTOCENE ; LOW-LATITUDE ; INNER-CORE ; SEA-LEVEL ; STRATIGRAPHY ; CLASSIFICATION ; FLUCTUATIONS ; GLACIATION |
| 资助项目 | Australian Postgraduate Award ; Curtin Research Scholarship ; Australian Research Council |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000490085300001 |
| 出版者 | WILEY |
| 资助机构 | Australian Postgraduate Award ; Australian Postgraduate Award ; Curtin Research Scholarship ; Curtin Research Scholarship ; Australian Research Council ; Australian Research Council ; Australian Postgraduate Award ; Australian Postgraduate Award ; Curtin Research Scholarship ; Curtin Research Scholarship ; Australian Research Council ; Australian Research Council ; Australian Postgraduate Award ; Australian Postgraduate Award ; Curtin Research Scholarship ; Curtin Research Scholarship ; Australian Research Council ; Australian Research Council ; Australian Postgraduate Award ; Australian Postgraduate Award ; Curtin Research Scholarship ; Curtin Research Scholarship ; Australian Research Council ; Australian Research Council |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/93895]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Nordsvan, Adam R. |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 2.Eberhard Karls Univ Tubingen, Dept Geosci, Tubingen, Germany 3.Curtin Univ, Ctr Explorat Targeting Curtin Node, Sch Earth & Planetary Sci, Perth, WA, Australia 4.Curtin Univ, Ctr Excellence Core Crust Fluid Syst CCFS, Inst Geosci Res TIGeR,Earth Dynam Res Grp, Australian Res Council,Sch Earth & Planetary Sci, Perth, WA 6845, Australia |
| 推荐引用方式 GB/T 7714 | Nordsvan, Adam R.,Barham, Milo,Cox, Grant,et al. Major shoreline retreat and sediment starvation following Snowball Earth[J]. TERRA NOVA,2019,31(6):495-502. |
| APA | Nordsvan, Adam R.,Barham, Milo,Cox, Grant,Kirscher, Uwe,&Mitchell, Ross N..(2019).Major shoreline retreat and sediment starvation following Snowball Earth.TERRA NOVA,31(6),495-502. |
| MLA | Nordsvan, Adam R.,et al."Major shoreline retreat and sediment starvation following Snowball Earth".TERRA NOVA 31.6(2019):495-502. |
入库方式： OAI收割
来源：地质与地球物理研究所
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