globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1804350116
论文题名:
Neoproterozoic glacial origin of the Great Unconformity
作者: 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.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2019
卷: 116, 期:4
起始页码: 1136
结束页码: 1145
语种: 英语
英文关键词: Cambrian explosion ; Glacial erosion ; Great Unconformity ; Snowball Earth ; Zircon
Scopus关键词: hafnium ; isotope ; oxygen ; zirconium ; Article ; erosion ; exhumation ; glaciation ; Monte Carlo method ; Neoproterozoic ; priority journal ; sea level ; sedimentation ; soil erosion
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162285
Appears in Collections:气候变化与战略

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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 States; Peters, S.E., Department of Geoscience, University of Wisconsin–Madison, Madison, WI 53706, United States

Recommended Citation:
Brenhin Keller C.,Husson J.M.,Mitchell R.N.,et al. Neoproterozoic glacial origin of the Great Unconformity[J]. Proceedings of the National Academy of Sciences of the United States of America,2019-01-01,116(4)
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