000121005 001__ 121005
000121005 005__ 20240319081023.0
000121005 0247_ $$2doi$$a10.1344/GeologicaActa2022.20.12
000121005 0248_ $$2sideral$$a131415
000121005 037__ $$aART-2022-131415
000121005 041__ $$aeng
000121005 100__ $$0(orcid)0000-0002-0504-2352$$aPueyo, Emilio Luis
000121005 245__ $$aThe chronology and rotational kinematics in the South-Eastern Jaca Basin (Southern Pyrenees): Las Bellostas section
000121005 260__ $$c2022
000121005 5060_ $$aAccess copy available to the general public$$fUnrestricted
000121005 5203_ $$aDespite the large number of magnetostratigraphic studies in the South Pyrenean Basin aiming to calibrate the basin chronostratigraphy and the biostratigraphic scales, the South Eastern Jaca Basin remains unexplored from this perspective, and its relation with the Ainsa Basin is not fully understood. In this work we contribute with new magnetostratigraphic data from the 950m thick Las Bellostas section, located in the northern hinge of the Balzes anticline. Well-proven primary signal (positive fold test and two pseudo-antiparallel polarities) supported by numerous primary data in the surroundings allow us building a reliable local polarity sequence of eight magnetozones (from R1 to N4). Additionally, seven new biostratigraphic samples (Nummulites and Assilina) in the lower part of the section (marine environment) allows tightening the section to the Geomagnetic Polarity Time Scale (GPTS) and proposing a refined age model for the southeastern Jaca Basin. The section starts in the Boltaña Fm., of Cuisian age (Shallow Benthic Zone, SBZ11), is followed by a sedimentary gap from C22n to C20n as witnessed by biostratigraphic data (SBZ11 underneath the hiatus and SBZ16 just atop). The deltaic Sobrarbe Fm. can be tracked until the C19n (Late Lutetian). From this point (200m) until the top of the section (950m), at least, the entire C18n chron can be recognized within the molassic Campodarbe Fm. (C18n.2n-C18n.1r and C18n.1n) (Bartonian) equivalent to the West to the prodeltaic Arguis marls Fm. The Middle Cusian (SBZ11) to Middle Lutetian (SBZ15) stratigraphic hiatus is, in part, enhanced by the structural position at the hinge of the Balzes anticline. These new chronostratigraphic constraints help refining the W-E and N-S stratigraphic relationships in the eastern Jaca Basin and in the Ainsa Basin. This section also allows us to accurately refine the kinematics of the rotational activity in the eastern External Sierras. The important difference in magnetic declination along the section and neighboring paleomagnetic data from the Balzes anticline (from ≈70º clockwise at the base of the stratigraphic section to non-significant at the top) together with the new age model for the Eastern Jaca Basin help characterizing the rotational activity of the Balzes thrust sheet. The rotation took place between chrons C20r (Middle Lutetian; 45Ma) and C17 (Lower Priabonian 37-38Ma) in agreement to nearby structures (Boltaña, Picodel Aguila anticlines) but clearly diachronic to western ones (Santo Domingo anticline). Besides, the rotational activity seems to follow a linear and continuous pattern (velocity 9-11º/Ma, R: 0.83-0.96) in contrast to closer structures that show two distinct rotational velocities (i.e. Boltaña). These new data still let open the debate on the rotational kinematics along the South Pyrenean basal thrust.
000121005 536__ $$9info:eu-repo/grantAgreement/ES/MICINN/CGL2017-90632-REDT$$9info:eu-repo/grantAgreement/ES/MICINN/PID2019-104693GB-I00/CTA$$9info:eu-repo/grantAgreement/ES/MINECO/CGL2014-54118-C2-2-R
000121005 540__ $$9info:eu-repo/semantics/openAccess$$aby-sa$$uhttp://creativecommons.org/licenses/by-sa/3.0/es/
000121005 590__ $$a1.5$$b2022
000121005 592__ $$a0.364$$b2022
000121005 591__ $$aGEOLOGY$$b24 / 48 = 0.5$$c2022$$dQ2$$eT2
000121005 593__ $$aGeology$$c2022$$dQ3
000121005 594__ $$a2.0$$b2022
000121005 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000121005 700__ $$aRodríguez-Pintó, Adriana
000121005 700__ $$aSerra-Kiel, Josep
000121005 700__ $$aBarnolas, Antonio
000121005 773__ $$g20 (2022), [29 pp.]$$pGeol. acta$$tGeologica Acta$$x1695-6133
000121005 8564_ $$s9133142$$uhttps://zaguan.unizar.es/record/121005/files/texto_completo.pdf$$yVersión publicada
000121005 8564_ $$s2414313$$uhttps://zaguan.unizar.es/record/121005/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
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000121005 951__ $$a2024-03-18-16:23:46
000121005 980__ $$aARTICLE