111674 20240122154815.0 doi 10.21701/bolgeomin.131.2.003 sideral 127712 ART-2021-127712 mul Muñoz, Arsenio Universidad de Zaragoza (orcid)0000-0001-5700-6495 Periodicidad climática y datación astrocronológica del Grupo Enciso en la cuenca oriental de Cameros (N de España) 2021 Access copy available to the general public Unrestricted This study presents the cyclostratigraphic analysis of a detailed, 1,371 m-thick stratigraphic section logged in the Lower Cretaceous syn-rift lacustrine and alluvial deposits of the Enciso Group, in the eastern Cameros Basin. The spectral analysis of a time series based on lithology reveals periodic sedimentary cycles attributable to variations in the eccentricity of the Earth’s orbit around the Sun (131.8 and 39.9 m-thick sedimentary cycles for the long and short orbital eccentricity cycle) and to changes in the obliquity (12.6 m-thick cycle) and the two precession modes (7.7-5.5 m-thick cycles) of the Earth’s rotation axis. We have constructed a floating astrochronological time scale based on the spectral analysis allowing us to propose that the time interval registered in the studied series is ca. 5.4-5.7 Ma, and to estimate an average sedimentation rate of ~255-239 m/Ma. The presence of cycles representing a similar time span but having different thickness, reveals a higher influence of tectonic activity in the central and upper parts of the succession, and discriminate tectonic from climatic signal, the latter being significant throughout the succession. The sedimentary facies and paleontological content of the studied profile, deposited very close to the coastline, have allowed us to interpret a deepening-shallowing cycle that it is proposed to be eustasy- related (transgressive-regressive cycle). The anchoring of this cycle with the sea level curve in combination with the scarce paleontological dates permit the Enciso Group to be located in the Hauterivian-Barremian, that was approximately deposited between 132.5-126.8 or 132.3-126.9 Ma, depending on whether the short or long eccentricity cycle is considered, respectively. info:eu-repo/grantAgreement/ES/AEI/PID2019-108705GB-I00 info:eu-repo/grantAgreement/ES/DGA/E32-17R info:eu-repo/grantAgreement/ES/DGA/E32-20R info:eu-repo/grantAgreement/ES/DGA-FEDER/Construyendo Europa desde Aragón info:eu-repo/grantAgreement/ES/UZ/UZ2017-CIE-08 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 0.231 2021 Geology 2021 Q3 Geochemistry and Petrology 2021 Q3 0.8 2021 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Angulo, Ana Liesa, Carlos L. Universidad de Zaragoza (orcid)0000-0002-9130-117X Luzón, María Aránzazu Universidad de Zaragoza (orcid)0000-0002-8929-9429 Mayayo, María José Universidad de Zaragoza (orcid)0000-0003-0410-6948 Pérez, Antonio Universidad de Zaragoza (orcid)0000-0001-6285-2522 Soria, Ana R. Universidad de Zaragoza (orcid)0000-0003-2963-8422 Val, Víctor Yuste, Alfonso Universidad de Zaragoza (orcid)0000-0002-2169-4561 2000 280 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Estratigrafía 2000 428 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Geodinámica Interna 2000 120 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Cristalografía Mineralog. 131, 2 (2021), 243-268 Bol. Geol. Min. Boletin Geologico y Minero 0366-0176 3609969 http://zaguan.unizar.es/record/111674/files/texto_completo.pdf Versión publicada 3107176 http://zaguan.unizar.es/record/111674/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:111674 articulos driver 2024-01-22-15:39:27 ARTICLE