DOI: 10.1016/j.quascirev.2017.07.020
Scopus记录号: 2-s2.0-85029003738
论文题名: Constraining processes of landscape change with combined in situ cosmogenic 14C-10Be analysis
作者: Hippe K.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 173 起始页码: 1
结束页码: 19
语种: 英语
英文关键词: Complex exposure
; Cosmogenic nuclides
; Erosion
; Glacial
; Inheritance
; Quaternary
; Sediment
; Soil
; Surface exposure dating
Scopus关键词: Catchments
; Erosion
; Glacial geology
; Sedimentology
; Sediments
; Soils
; Complex exposure
; Cosmogenic nuclides
; Glacial
; Inheritance
; Quaternary
; Surface exposure dating
; Isotopes
英文摘要: Reconstructing Quaternary landscape evolution today frequently builds upon cosmogenic-nuclide surface exposure dating. However, the study of complex surface exposure chronologies on the 102–104 years’ timescale remains challenging with the commonly used long-lived radionuclides (10Be, 26Al, 36Cl). In glacial settings, key points are the inheritance of nuclides accumulated in a rock surface during a previous exposure episode and (partial) shielding of a rock surface after the main deglaciation event, e.g. during phases of glacier readvance. Combining the short-lived in situ cosmogenic 14C isotope with 10Be dating provides a valuable approach to resolve and quantify complex exposure histories and burial episodes within Lateglacial and Holocene timescales. The first studies applying the in situ 14C-10Be pair have demonstrated the great benefit from in situ 14C analysis for unravelling complex glacier chronologies in various glacial environments worldwide. Moreover, emerging research on in situ 14C in sedimentary systems highlights the capacity of combined in situ 14C-10Be analysis to quantify sediment transfer times in fluvial catchments or to constrain changes in surface erosion rates. Nevertheless, further methodological advances are needed to obtain truly routine and widely available in situ 14C analysis. Future development in analytical techniques has to focus on improving the analytical reproducibility, reducing the background level and determining more accurate muonic production rates. These improvements should allow extending the field of applications for combined in situ 14C-10Be analysis in Earth surface sciences and open up a number of promising applications for dating young sedimentary deposits and the quantification of recent changes in surface erosion dynamics. © 2017 Elsevier Ltd
资助项目: The author wishes to thank the many scientists and technicians that have contributed to the in situ 14C research performed at ETH Zürich over the past 10 years. Many thanks to the group of Isotope Geochemistry and to all members of the Laboratory of Ion Beam Physics. Special thanks to F. Kober and L. Wacker for their dedication and encouragement. M. Lupker, S. Ivy-Ochs and R. Wieler are thanked for helpful comments on an earlier version of the manuscript, many valuable discussions and great support. Constructive reviews by N. Akçar and an anonymous reviewer helped to considerably improve the manuscript. The author acknowledges funding by the Swiss National Science Foundation MHV grant (PMPDP2_158288/1).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59096
Appears in Collections: 过去全球变化的重建
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作者单位: Laboratory of Ion Beam Physics, ETH Zürich, Otto-Stern-Weg 5, Zürich, Switzerland
Recommended Citation:
Hippe K.. Constraining processes of landscape change with combined in situ cosmogenic 14C-10Be analysis[J]. Quaternary Science Reviews,2017-01-01,173