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DOI	10.1073/pnas.1422887112
	Revealing the climate of snowball Earth from δ17O systematics of hydrothermal rocks
	Herwartz D.; Pack A.; Krylov D.; Xiao Y.; Muehlenbachs K.; Sengupta S.; Di Rocco T.
发表日期	2015
ISSN	0027-8424
起始页码	5337
结束页码	5341
卷号	112 期号:17
英文摘要	The oxygen isotopic composition of hydrothermally altered rocks partly originates from the interacting fluid. We use the triple oxygen isotope composition (17O/16O, 18O/16O) of Proterozoic rocks to reconstruct the 18O/16O ratio of ancient meteoric waters. Some of these waters have originated from snowball Earth glaciers and thus give insight into the climate and hydrology of these critical intervals in Earth history. For a Paleoproterozoic [∼2.3-2.4 gigayears ago (Ga)] snowball Earth, δ18O = -43 ± 3‰ is estimated for pristine meteoric waters that precipitated at low paleo-latitudes (≤35°N). Today, such low 18O/16O values are only observed in central Antarctica, where long distillation trajectories in combination with low condensation temperatures promote extreme 18O depletion. For a Neoproterozoic (∼0.6-0.7 Ga) snowball Earth, higher meltwater δ18O estimates of -21 ± 3‰ imply less extreme climate conditions at similar paleolatitudes (≤35°N). Both estimates are single snapshots of ancient water samples and may not represent peak snowball Earth conditions. We demonstrate how 17O/16O measurements provide information beyond traditional 18O/16O measurements, even though all fractionation processes are purely mass dependent. © 2015, National Academy of Sciences. All rights reserved.
英文关键词	Climate; Hydrothermal alteration; Paleo-temperatures; Snowball Earth; Triple oxygen isotopes
语种	英语
scopus关键词	chemical compound; oxygen; oxygen 17; water; Antarctica; Article; astronomy; climate; distillation; fractionation; glacier; hydrology; isotope analysis; latitude; measurement; Neoproterozoic; Paleoproterozoic; polymerization; Precambrian; priority journal; Proterozoic; rock; taxonomy; temperature; water sampling
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/159094
作者单位	Herwartz, D., Abteilung Isotopengeologie, Geowissenschaftliches Zentrum, Georg-August-Universität Göttingen, Göttingen, 37073, Germany, Institut für Geologie und Mineralogie, Universität zu Köln, Cologne, 50674, Germany; Pack, A., Abteilung Isotopengeologie, Geowissenschaftliches Zentrum, Georg-August-Universität Göttingen, Göttingen, 37073, Germany; Krylov, D., Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, St. Petersburg, 199034, Russian Federation; Xiao, Y., CAS Key Laboratory of Crustal-Mantle Materials and Environments, School of Earth and Space Science, University of Science and Technology of China, Hefei, 230026, China; Muehlenbachs, K., Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3, Canada; Sengupta, S., Abteilung Isotopengeologie, Geowissenschaftliches Zentrum, Georg-August-Universität Göttingen, Göttingen, 37073, Germany; Di Rocco, T., Abteilung Isotopengeologie, Geowissenschaftliches Zentrum, Georg-August-Universität...
推荐引用方式 GB/T 7714	Herwartz D.,Pack A.,Krylov D.,et al. Revealing the climate of snowball Earth from δ17O systematics of hydrothermal rocks[J],2015,112(17).
APA	Herwartz D..,Pack A..,Krylov D..,Xiao Y..,Muehlenbachs K..,...&Di Rocco T..(2015).Revealing the climate of snowball Earth from δ17O systematics of hydrothermal rocks.Proceedings of the National Academy of Sciences of the United States of America,112(17).
MLA	Herwartz D.,et al."Revealing the climate of snowball Earth from δ17O systematics of hydrothermal rocks".Proceedings of the National Academy of Sciences of the United States of America 112.17(2015).