DOI: 10.1016/j.quascirev.2018.06.001
Scopus记录号: 2-s2.0-85048949855
论文题名: Terrestrial 10Be and electron spin resonance dating of fluvial terraces quantifies quaternary tectonic uplift gradients in the eastern Pyrenees
作者: Delmas M. ; Calvet M. ; Gunnell Y. ; Voinchet P. ; Manel C. ; Braucher R. ; Tissoux H. ; Bahain J.-J. ; Perrenoud C. ; Saos T. ; ASTER Team
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 193 起始页码: 188
结束页码: 211
语种: 英语
英文关键词: Alluvial terrace chronosequence
; Electron spin resonance
; Fluvial incision
; Neotectonics
; Pleistocene
; Terrestrial cosmogenic nuclide
; Topographic uplift
Scopus关键词: Electrospinning
; Magnetic moments
; Paramagnetic resonance
; Spin dynamics
; Weathering
; Chronosequences
; Fluvial incision
; Neotectonics
; Pleistocene
; Terrestrial cosmogenic nuclides
; Topographic uplift
; Landforms
; beryllium isotope
; burial (geology)
; chronosequence
; climate forcing
; cosmogenic radionuclide
; dating method
; electron spin resonance
; isostasy
; Mediterranean environment
; moraine
; Neogene
; neotectonics
; orogeny
; Pleistocene
; Quaternary
; regolith
; terrace
; topography
; uplift
; watershed
; Pyrenees
英文摘要: The 120 km -longTêt River flows out of the Pyrenees to the Mediterranean. By displaying a mappable sequence of Quaternary alluvial units between the Pleistocene frontal moraines of the high range and the offshore sedimentary depocentres, its 1400 km2 watershed is well suited to quantifying gradients of topographic uplift. Five main generations of terrace treads had previously been inferred from constrasts in regolith weathering features, but here we present the first radiometric age constraints based on 15 ESR sediment burial ages covering the full sequence, and 3 vertical TCN age profiles restricted to three mid-sequence terraces. Analytically robust results were obtained for the oldest and uppermost terrace T5 (ESR age: 1099 ± 179 ka), for T3b (ESR age: 374 ± 47 ka, ∼MIS 10), and for T2 (ESR age: 174 ± 44 ka, ∼MIS 6). These results are consistent with the contrasts in weathering grade of the deposits. The TCN profiles only yielded minimum exposure ages but provided precise post-depositional denudation rates for the fluvial terrace treads. The land-to-sea geometry of the chronosequence also provided clues about valley incision rates in response to topographic uplift during the last ∼1 Ma. Based on a critical review of similar data obtained for other Mediterranean and Atlantic watersheds in the Pyrenees, the full regional correlation reveals that post-orogenic topographic uplift was substantial and relatively uniform throughout the entire mountain range. Patterns and magnitudes suggest a shared, probably subcrustal driving mechanism of Neogene and Quaternary mountain growth, with only subsidiary influence from isostasy, and climatic forcing. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112117
Appears in Collections: 气候减缓与适应
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作者单位: Université de Perpignan Via Domitia, UMR CNRS 7194 Histoire naturelle de l'Homme Préhistorique, 52 Avenue Paul Alduy, Perpignan, 66860, France; Université de Lyon, CNRS UMR 5600 Environnement, Ville, Société, 5 Avenue Pierre Mendès-France, Bron Cedex, F-69676, France; Museum National d'Histoire Naturelle de Paris, Institut de Paléonthologie Humaine, UMR CNRS 7194 Histoire naturelle de l'Homme Préhistorique, 1, Rue René Panhard, Paris, 75013, France; Aix-Marseille Université, CNRS-IRD-Collège de France, UM 34 CEREGE, Technopôle de l'Environnement Arbois-Méditerranée, BP80, Aix-en-Provence, 13545, France; BRGM, DGR/GAT, 3 Avenue Claude Guillemin, BP 36009, Orléans, 45060, France
Recommended Citation:
Delmas M.,Calvet M.,Gunnell Y.,et al. Terrestrial 10Be and electron spin resonance dating of fluvial terraces quantifies quaternary tectonic uplift gradients in the eastern Pyrenees[J]. Quaternary Science Reviews,2018-01-01,193