globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2016.07.025
Scopus记录号: 2-s2.0-84979713210
论文题名:
10Be cosmic-ray exposure dating of moraines and rock avalanches in the Upper Romanche valley (French Alps): Evidence of two glacial advances during the Late Glacial/Holocene transition
作者: Chenet M.; Brunstein D.; Jomelli V.; Roussel E.; Rinterknecht V.; Mokadem F.; Biette M.; Robert V.; Léanni L.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 148
起始页码: 209
结束页码: 221
语种: 英语
英文关键词: 10Be cosmic-ray exposure dating ; French Alps ; Glacier fluctuations ; Holocene ; Late Glacial
Scopus关键词: Climate change ; Cosmology ; Glacial geology ; Landforms ; <sup>10</sup>Be cosmic-ray exposure dating ; French Alps ; Glacier fluctuations ; Holocenes ; Late Glacial ; Cosmic rays ; Allerod ; beryllium isotope ; chronology ; climate change ; cosmic ray ; dating method ; Holocene ; late glacial ; moraine ; Postglacial ; radiation exposure ; reconstruction ; rock avalanche ; Younger Dryas ; Alps ; France ; Pelvoux Massif
英文摘要: Cosmic-ray exposure (CRE) dating of moraines allow glacier fluctuations and past climate change reconstructions. In the French Alps, there is a lack of moraine dating for the Late Glacial/Holocene transition period. Here we present a chronology of glacier advances in the Upper Romanche valley (French Alps – Massif des Ecrins) based on 10Be CRE dating. CRE ages of moraines of 13.0 ± 1.1 ka and 12.4 ± 1.5 ka provide evidence for two stages of glacial advance or standstill at the end of the Late Glacial. The CRE dating of a rock avalanche deposit at 12.2 ± 1.5 ka is attributed to post-glacial debuttressing and reveals rapid deglaciation at the end of the Late Glacial. A CRE age of 7.1 ± 0.7 ka of a second mass-wasting, whose triggering factor is unidentified so far, indicates that up to an altitude of 2300 m a.s.l., the valley was ice-free as of ∼7 kyr at the latest. The re-evaluation of 21 moraine 10Be CRE ages from nine glacial valleys across the Alps shows multiple glacial advances occurring at the Late Glacial/Holocene transition. These results lead to a re-evaluation of the importance of cooling events during the Allerød and the Younger Dryas in the Alps. © 2016 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59488
Appears in Collections:过去全球变化的重建

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作者单位: Université Paris 1 Panthéon-Sorbonne, CNRS, UMR 8591, Laboratoire de Géographie Physique, Meudon, France; Université Clermont Auvergne, University Blaise Pascal, CNRS, UMR 6042, GEOLAB – Laboratoire de géographie physique et environnementale, Clermont-Ferrand, France; Institut de physique du globe de Paris, Observatoire volcanologique et sismologique de la Guadeloupe, Le HouëlmontGourbeyre, Guadeloupe; Aix-Marseille Université, CNRS-IRD UM 34 CEREGE, Technopôle de l'Environnement Arbois-Méditerranée, 80, Aix-en-Provence Cedex 04, BP, France

Recommended Citation:
Chenet M.,Brunstein D.,Jomelli V.,et al. 10Be cosmic-ray exposure dating of moraines and rock avalanches in the Upper Romanche valley (French Alps): Evidence of two glacial advances during the Late Glacial/Holocene transition[J]. Quaternary Science Reviews,2016-01-01,148
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