气候变化领域集成服务门户(CCPortal): Timing and tempo of the great oxidation event

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DOI	10.1073/pnas.1608824114
	Timing and tempo of the great oxidation event
	Gumsley A.P.; Chamberlain K.R.; Bleeker W.; Söderlund U.; De Kock M.O.; Larsson E.R.; Bekker A.
发表日期	2017
ISSN	0027-8424
起始页码	1811
结束页码	1816
卷号	114 期号:8
英文摘要	The first significant buildup in atmospheric oxygen, the Great Oxidation Event (GOE), began in the early Paleoproterozoic in association with global glaciations and continued until the end of the Lomagundi carbon isotope excursion ca. 2,060 Ma. The exact timing of and relationships among these events are debated because of poor age constraints and contradictory stratigraphic correlations. Here, we show that the first Paleoproterozoic global glaciation and the onset of the GOE occurred between ca. 2,460 and 2,426 Ma, ∼100 My earlier than previously estimated, based on an age of 2,426 ± 3 Ma for Ongeluk Formation magmatism from the Kaapvaal Craton of southern Africa. This age helps define a key paleomagnetic pole that positions the Kaapvaal Craton at equatorial latitudes of 11° ± 6° at this time. Furthermore, the rise of atmospheric oxygen was not monotonic, but was instead characterized by oscillations, which together with climatic instabilities may have continued over the next ∼200 My until ≤2,250-2,240 Ma. Ongeluk Formation volcanism at ca. 2,426 Ma was part of a large igneous province (LIP) and represents a waning stage in the emplacement of several temporally discrete LIPs across a large low-latitude continental landmass. These LIPs played critical, albeit complex, roles in the rise of oxygen and in both initiating and terminating global glaciations. This series of events invites comparison with the Neoproterozoic oxygen increase and Sturtian Snowball Earth glaciation, which accompanied emplacement of LIPs across supercontinent Rodinia, also positioned at low latitude.
英文关键词	Great oxidation event; Kaapvaal craton; Paleoproterozoic; Snowball earth; Transvaal supergroup
语种	英语
scopus关键词	oxygen; Article; atmosphere; glaciation; great oxidation event; latitude; lithosphere; meteorological phenomena; Neoproterozoic; oscillation; oxygenation; Paleoproterozoic; priority journal; stratigraphy; volcano; weathering
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160661
作者单位	Gumsley, A.P., Department of Geology, Lund University, Lund, 22362, Sweden; Chamberlain, K.R., Department of Geology and Geophysics, University of Wyoming, Laramie, WY 82071, United States, Faculty of Geology and Geography, Tomsk State University, Tomsk, 634050, Russian Federation; Bleeker, W., Geological Survey of Canada, Ottawa, ON K1A0E8, Canada; Söderlund, U., Department of Geology, Lund University, Lund, 22362, Sweden, Department of Geosciences, Swedish Museum of Natural History, Stockholm, 10405, Sweden; De Kock, M.O., Department of Geology, University of Johannesburg, Auckland Park, 2006, South Africa; Larsson, E.R., Department of Geology, Lund University, Lund, 22362, Sweden; Bekker, A., Department of Geology, University of Johannesburg, Auckland Park, 2006, South Africa, Department of Earth Sciences, University of California, Riverside, CA 92521, United States
推荐引用方式 GB/T 7714	Gumsley A.P.,Chamberlain K.R.,Bleeker W.,et al. Timing and tempo of the great oxidation event[J],2017,114(8).
APA	Gumsley A.P..,Chamberlain K.R..,Bleeker W..,Söderlund U..,De Kock M.O..,...&Bekker A..(2017).Timing and tempo of the great oxidation event.Proceedings of the National Academy of Sciences of the United States of America,114(8).
MLA	Gumsley A.P.,et al."Timing and tempo of the great oxidation event".Proceedings of the National Academy of Sciences of the United States of America 114.8(2017).