Open Access
Inferringdenudationvariationsfromthesediment record; anexampleof thelastglacialcyclerecordof the Golo Basinandwatershed,East Corsica, western Mediterraneansea
Gérôme Calvès,S. Toucanne,G. Jouet,S. Charrier,E. Thereau,Joel Etoubleau,Tania Marsset,L. Droz,M. Bez,Vitor Abreu,Stephan J. Jorry,T. Mulder,Gilles Lericolais +12 more
- 01 Jan 2012
2
TL;DR: In this paper, the authors used geophysical data and sampling of the Golo Basin (East Corsica margin) to study mass balance in a single drainage system over the last 130 kyr, by comparing deposited sediments in the sink and the maximum eroded volume in the source.
read more
Abstract: Geophysical data and sampling of the Golo Basin (East Corsica margin) provide the opportunity to study mass balance in a single drainage system over the last 130 kyr, by comparing deposited sediments in the sink and the maximum eroded volume in the source using total denudation proxies. Evaluation of the solid sediments deposited offshore and careful integration of uncertainties from the age model and physical properties allow us to constrain three periods of sedimentation during the last climatic cycle. The peak of sedimentation initiated during Marine Isotopic Stage (MIS) 3 (ca. 45 ka) and lasted until late in MIS 2 (ca. 18 ka). This correlates with Mediterranean Sea palaeoclimatic records and the glaciation in high altitude Corsica. The yield of solid sediment into the Golo Basin drops in the observed present day Mediterranean basins (gauging stations), whereas the palaeo-denudation estimate derived from the sediments over the last glacial period is one to ten times higher than that predicted using cosmogenic or thermochronometer estimates of exhumation. The catchment-wide denudation rate calculated from deposited solid sediment ranges from 47 to 219 mm kyr � 1 , which is higher than the estimate from palaeosurface ablation in the proximal part of the source (9–140 mm kyr � 1 ) and lower than the distal, narrow, incised channel of the Golo River (160–475 mm kyr � 1 ). This mismatch raises questions about the investigation of denudation at millennial-time scale (kyr) and at higher integrating times (Myr) as a reliable tool for determining the effect of climate change on mountain building and on sedimentary basin models.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
A 130,000-year record of Levantine Intermediate Water flow variability in the Corsica Trough, western Mediterranean Sea
Samuel Toucanne,Gwenael Jouet,Emmanuelle Ducassou,Maria-Angela Bassetti,Bernard Dennielou,C.M. Angue Minto'o,M. Lahmi,Nicolas Touyet,Karine Charlier,Gilles Lericolais,Thierry Mulder +10 more
- 01 Jan 2014
Abstract: Abstract Sortable silt particle-size data and stable isotope analyses from the Corsica Trough, western Mediterranean Sea, provide a continuous palaeoceanographic record of the inflow, ventilation and vertical fluctuations of the Levantine Intermediate Water (LIW) in the northern Tyrrhenian Sea for the last 130,000 years. The results presented herein reveal that climate changes drive the Mediterranean intermediate circulation on Milankovitch to millennial time-scales. Intensified intermediate inflow and ventilation in the Corsica Trough occurred throughout the last glacial interval, with a cold/faster – warm/slower pattern existing between the Dansgaard-Oeschger climatic oscillations (including Heinrich events) and the LIW variability. By contrast, a weak intermediate ventilation characterised the Holocene and the Last Interglacial period, especially during insolation maxima and the sapropel deposition in the eastern Mediterranean. This variability probably reflects the changes of the eastern Mediterranean net evaporation, as well as the propagation to the western Mediterranean of the profound hydrographic adjustments of the Levantine Sea and adjacent areas to climate forcing. The implications for the formation and ventilation of the Western Mediterranean Deep Water (WMDW) in the northwestern Mediterranean basin, as well as for Mediterranean–Atlantic exchange through the Strait of Gibraltar are discussed.
Weathering of granite and granitic regolith in Corsica: short-term 10Be versus long-term thermochronological constraints Weathering of granite and granitic regolith in Corsica: short-term
Joachim Kuhlemann,Ingrid Krumrei,Martin Danišík,K. van der Borg +3 more
- 01 Jan 2009
TL;DR: In this paper, in situ 10 Be concentrations in granites on Corsica (Mediterranean), exposed to subalpine climate, yield weathering rates of between 9 and 20 mm ka−1, when averaged over the last 30-100 ka.
2
References
IntCal13 and Marine13 radiocarbon age calibration curves 0-50,000 years cal BP
Paula J. Reimer,Edouard Bard,Alex Bayliss,J. Warren Beck,Paula G Blackwell,Christopher Bronk Ramsey,Caitlin E. Buck,Hai Cheng,R. Lawrence Edwards,Michael Friedrich,Pieter Meiert Grootes,Thomas P. Guilderson,Haflidi Haflidason,Irka Hajdas,Christine Hatté,Timothy J Heaton,Dirk L. Hoffmann,Alan G. Hogg,Konrad A Hughen,K Felix Kaiser,Bernd Kromer,Sturt W. Manning,Mu Niu,Ron W Reimer,David Richards,E. Marian Scott,John Southon,Richard A. Staff,Christian Turney,Johannes van der Plicht +29 more
TL;DR: In this paper, Heaton, AG Hogg, KA Hughen, KF Kaiser, B Kromer, SW Manning, RW Reimer, DA Richards, JR Southon, S Talamo, CSM Turney, J van der Plicht, CE Weyhenmeyer
Extended 14C Data Base and Revised Calib 3.0 14C Age Calibration Program
Minze Stuiver,Paula J. Reimer +1 more
TL;DR: The age calibration program, CALIB (Stuiver & Reimer 1986), first made available in 1986 and subsequently modified in 1987 (revision 2.0 and 2.1), has been amended anew as mentioned in this paper.
A Pliocene-Pleistocene stack of 57 globally distributed benthic δ18O records
TL;DR: In this paper, a 53-Myr stack (LR04) of benthic δ18O records from 57 globally distributed sites aligned by an automated graphic correlation algorithm is presented.
Age dating and the orbital theory of the ice ages: Development of a high-resolution 0 to 300,000-year chronostratigraphy
Douglas G. Martinson,Nicklas G Pisias,James D. Hays,John Imbrie,Theodore C. Moore,Nicholas J Shackleton +5 more
TL;DR: Using the concept of "orbital tuning", a continuous, high-resolution deep-sea chronostratigraphy has been developed spanning the last 300,000 yr as mentioned in this paper.
3.4K
Unraveling the effects of potassium metasomatism in sedimentary rocks and paleosols, with implications for paleoweathering conditions and provenance
TL;DR: In this article, the authors used ternary diagrams to determine the amount of K addition, premetasomatized sediment composition, and composition of provenance areas, which can be compared with the mineralogy of recent soil profiles and thus, climate and topographic conditions determined for past weathering events.
2.6K