气候变化领域集成服务门户(CCPortal): Neoproterozoic glacial origin of the Great Unconformity

CCPortal

DOI	10.1073/pnas.1804350116
	Neoproterozoic glacial origin of the Great Unconformity
	Brenhin Keller C.; Husson J.M.; Mitchell R.N.; Bottke W.F.; Gernon T.M.; Boehnke P.; Bell E.A.; Swanson-Hysell N.L.; Peters S.E.
发表日期	2019
ISSN	0027-8424
起始页码	1136
结束页码	1145
卷号	116 期号:4
英文摘要	The Great Unconformity, a profound gap in Earth’s stratigraphic record often evident below the base of the Cambrian system, has remained among the most enigmatic field observations in Earth science for over a century. While long associated directly or indirectly with the occurrence of the earliest complex animal fossils, a conclusive explanation for the formation and global extent of the Great Unconformity has remained elusive. Here we show that the Great Unconformity is associated with a set of large global oxygen and hafnium isotope excursions in magmatic zircon that suggest a late Neoproterozoic crustal erosion and sediment subduction event of unprecedented scale. These excursions, the Great Unconformity, preservational irregularities in the terrestrial bolide impact record, and the first-order pattern of Phanerozoic sedimentation can together be explained by spatially heterogeneous Neoproterozoic glacial erosion totaling a global average of 3–5 vertical kilometers, along with the subsequent thermal and isostatic consequences of this erosion for global continental freeboard. © 2019 National Academy of Sciences. All Rights Reserved.
英文关键词	Cambrian explosion; Glacial erosion; Great Unconformity; Snowball Earth; Zircon
语种	英语
scopus关键词	hafnium; isotope; oxygen; zirconium; Article; erosion; exhumation; glaciation; Monte Carlo method; Neoproterozoic; priority journal; sea level; sedimentation; soil erosion
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/159039
作者单位	Brenhin Keller, C., Berkeley Geochronology Center, Berkeley, CA 94709, United States, Department of Earth and Planetary Science, University of California, Berkeley, CA 94720, United States; Husson, J.M., School of Earth and Ocean Sciences, University of Victoria, Victoria, BC V8W 2Y2, Canada; Mitchell, R.N., Department of Applied Geology, Curtin University, Perth, WA 6845, Australia; Bottke, W.F., Southwest Research Institute, Boulder, CO 80302, United States; Gernon, T.M., Ocean and Earth Science, University of Southampton, Southampton, SO17 1BJ, United Kingdom; Boehnke, P., Department of the Geophysical Sciences, University of Chicago, Chicago, IL 60637, United States, Chicago Center for Cosmochemistry, Chicago, IL 60637, United States; Bell, E.A., Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, Los Angeles, CA 90095, United States; Swanson-Hysell, N.L., Department of Earth and Planetary Science, University of California, Berkeley, CA 94720, United Sta...
推荐引用方式 GB/T 7714	Brenhin Keller C.,Husson J.M.,Mitchell R.N.,et al. Neoproterozoic glacial origin of the Great Unconformity[J],2019,116(4).
APA	Brenhin Keller C..,Husson J.M..,Mitchell R.N..,Bottke W.F..,Gernon T.M..,...&Peters S.E..(2019).Neoproterozoic glacial origin of the Great Unconformity.Proceedings of the National Academy of Sciences of the United States of America,116(4).
MLA	Brenhin Keller C.,et al."Neoproterozoic glacial origin of the Great Unconformity".Proceedings of the National Academy of Sciences of the United States of America 116.4(2019).