High-resolution record reveals climate-driven environmental and sedimentary changes in an active rift.

Autor: McNeill LC; School of Ocean and Earth Science, University of Southampton, Southampton, S014 3ZH, United Kingdom. lcmn@noc.soton.ac.uk., Shillington DJ; Lamont-Doherty Earth Observatory of Columbia University, 61 Route 9W, Palisades, NY, 10964, USA., Carter GDO; British Geological Survey, The Lyell Centre, Edinburgh, United Kingdom., Everest JD; British Geological Survey, The Lyell Centre, Edinburgh, United Kingdom., Gawthorpe RL; Department of Earth Science, University of Bergen, Bergen, Norway., Miller C; Department of Earth, Environmental and Planetary Sciences, Rice University, Houston, USA., Phillips MP; Institute for Geophysics, University of Texas at Austin, Austin, USA., Collier REL; School of Earth and Environment, The University of Leeds, Leeds, United Kingdom., Cvetkoska A; Department of Animal Ecology and Systematics, Justus Liebig University, Giessen, Germany., De Gelder G; Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, Paris, France., Diz P; Departamento Geociencias Marinas y Ordenación del Territorio, Facultad de Ciencias del Mar, Universidad de Vigo, Vigo, Spain., Doan ML; Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, IFSTTAR, and ISTerre, Le Bourget-du-Lac, France., Ford M; CRPG, UMR 7358, France. Also at: Université de Lorraine, ENSG, INP, Nancy, France., Geraga M; Department of Geology, University of Patras, Patras, Greece., Gillespie J; Center for Tectonics, Resources, and Exploration (TRaX), Department of Earth Sciences, School of Physical Sciences, University of Adelaide, Adelaide, Australia., Hemelsdaël R; Géosciences Montpellier, Université de Montpellier, Montpellier, France., Herrero-Bervera E; University of Hawai'i at Manoa, Hawai'i Institute of Geophysics and Planetology, Honolulu, USA., Ismaiel M; University Centre for Earth and Space Sciences, University of Hyderabad, Hyderabad, India., Janikian L; Universidade Federal de São Paulo, Departamento de Ciências do Mar, Sao Paulo, Brazil., Kouli K; Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Athens, Greece., Le Ber E; School of Geography, Geology and the Environment, University of Leicester, Leicester, United Kingdom., Li S; School of Energy Resources, China University of Geosciences, Beijing, China., Maffione M; School of Geography Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom., Mahoney C; School of Earth and Environment, The University of Leeds, Leeds, United Kingdom., Machlus ML; Lamont-Doherty Earth Observatory of Columbia University, 61 Route 9W, Palisades, NY, 10964, USA.; Department of Physical Sciences, Kingsborough Community College, City University of New York, New York, USA., Michas G; Laboratory of Geophysics and Seismology, Technological Educational Institute of Crete, Irakleio, Greece., Nixon CW; Department of Earth Science, University of Bergen, Bergen, Norway., Oflaz SA; Graduate School 'Human Development in Landscapes', Christian-Albrechts-Universität zu Kiel, Kiel, Germany., Omale AP; Department of Geology and Geophysics, Louisiana State University, Baton Rouge, USA., Panagiotopoulos K; Institute of Geology and Minerology, University of Cologne, Cologne, Germany., Pechlivanidou S; Department of Earth Science, University of Bergen, Bergen, Norway., Sauer S; Ifremer, Department of Marine Geosciences, Centre Bretagne, Plouzané, France., Seguin J; Institute for Ecosystem Research, Christian-Albrechts-Universitat zu Kiel, Kiel, Germany., Sergiou S; Department of Geology, University of Patras, Patras, Greece., Zakharova NV; Department of Earth and Atmospheric Sciences, Central Michigan University, Mount Pleasant, USA., Green S; British Geological Survey, The Lyell Centre, Edinburgh, United Kingdom.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2019 Feb 28; Vol. 9 (1), pp. 3116. Date of Electronic Publication: 2019 Feb 28.
DOI: 10.1038/s41598-019-40022-w
Abstrakt: Young rifts are shaped by combined tectonic and surface processes and climate, yet few records exist to evaluate the interplay of these processes over an extended period of early rift-basin development. Here, we present the longest and highest resolution record of sediment flux and paleoenvironmental changes when a young rift connects to the global oceans. New results from International Ocean Discovery Program (IODP) Expedition 381 in the Corinth Rift show 10s-100s of kyr cyclic variations in basin paleoenvironment as eustatic sea level fluctuated with respect to sills bounding this semi-isolated basin, and reveal substantial corresponding changes in the volume and character of sediment delivered into the rift. During interglacials, when the basin was marine, sedimentation rates were lower (excepting the Holocene), and bioturbation and organic carbon concentration higher. During glacials, the basin was isolated from the ocean, and sedimentation rates were higher (~2-7 times those in interglacials). We infer that reduced vegetation cover during glacials drove higher sediment flux from the rift flanks. These orbital-timescale changes in rate and type of basin infill will likely influence early rift sedimentary and faulting processes, potentially including syn-rift stratigraphy, sediment burial rates, and organic carbon flux and preservation on deep continental margins worldwide.
Databáze: MEDLINE
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