Major shoreline retreat and sediment starvation following Snowball Earth

doi:10.1111/ter.12426

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Major shoreline retreat and sediment starvation following Snowball Earth
	Nordsvan, Adam R.4; Barham, Milo 3; Cox, Grant ; Kirscher, Uwe 2,4; Mitchell, Ross N.1,4
刊名	TERRA NOVA
	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.
资助项目	Australian Postgraduate Award ; Curtin Research Scholarship ; Australian Research Council
WOS关键词	CAP CARBONATE ; CONTINENTAL-MARGIN ; LATE PLEISTOCENE ; LOW-LATITUDE ; INNER-CORE ; SEA-LEVEL ; STRATIGRAPHY ; CLASSIFICATION ; FLUCTUATIONS ; GLACIATION
WOS研究方向	Geology
语种	英语
出版者	WILEY
WOS记录号	WOS:000490085300001
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
内容类型	期刊论文
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.