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Orbital-climate control of mass-flow sedimentation in a Miocene alluvial-fan succession (Teruel Basin, Spain)

Dario Ventra, Hemmo A. Abels, Frederik J. Hilgen and Poppe L. de Boer
Orbital-climate control of mass-flow sedimentation in a Miocene alluvial-fan succession (Teruel Basin, Spain) (in Geology and geomorphology of alluvial and fluvial fans; terrestrial and planetary perspectives, Dario Ventra (editor) and L. E. Clarke (editor))
Special Publication - Geological Society of London (September 2017) 440 (1): 129-157

Abstract

The role of climate change in driving alluvial-fan sedimentation is hard to assess in pre-Quaternary successions, for which detailed chronologies and climate-proxy records cannot be easily established. In the Teruel Basin (Spain), high-resolution (10 (super 4) -10 (super 5) years) chronological and palaeoclimatic information was derived by orbital tuning of Late Miocene mudflat to ephemeral-lake deposits. The semi-arid palaeoclimate made this low-gradient, basinal environment sensitive to thresholds in the local hydrological balance. Basic facies rhythms are attributed to alternating, relatively humid/arid phases controlled by the climatic precession cycle. The lower stratigraphic interval of this reference section interfingers with distal, coarse-clastic beds from a coeval alluvial fan. The consistent interdigitation of debris-flow deposits with distal strata indicative of arid-to-humid climate transitions shows that fan sedimentation was regulated by climate cyclicity. In particular, the largest volumes of terrigenous debris were shed from the fan onto adjacent mudflats during transitions to relatively humid periods with pronounced seasonality, during precession minima. Distal to medial sections within alluvial-fan outcrops also feature prominent, laterally continuous alternations of coarse- and fine-clastic packages. This high degree of architectural organization, uncommon in fan successions, and stratigraphic relationships with the reference section suggest orbitally controlled climate change to have been the forcing mechanism.


ISSN: 0305-8719
Coden: GSLSBW
Serial Title: Special Publication - Geological Society of London
Serial Volume: 440
Serial Issue: 1
Title: Orbital-climate control of mass-flow sedimentation in a Miocene alluvial-fan succession (Teruel Basin, Spain)
Title: Geology and geomorphology of alluvial and fluvial fans; terrestrial and planetary perspectives
Author(s): Ventra, DarioAbels, Hemmo A.Hilgen, Frederik J.de Boer, Poppe L.
Author(s): Ventra, Darioeditor
Author(s): Clarke, L. E.editor
Affiliation: Utrecht University, Faculty of Geosciences, Utrecht, Netherlands
Pages: 129-157
Published: 20170918
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 222
Accession Number: 2017-082783
Categories: Sedimentary petrologyStratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. cols., geol. sketch maps
N40°02'60" - N40°19'60", W01°16'60" - W01°06'00"
Secondary Affiliation: Delft University of Technology, NLD, Netherlands
Source Note: Online First
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201743
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