Management information
Title: Unravelling the kinetics of burial remagnetizations; an integrated 4D approach (paleomagnetism, geothermometry and geochronology)
Code: PID2019-104693GB-I00
Initial date: 1 de June de 2020
Ending date: 28 de February de 2025
Funding: 187550 €
E-mail: jc.larra@igme.es
Project description
UKRIA-4D aims at determining the kinematics of the burial remagnetization that affects the Eocene turbidites of the Hecho Group in the Southpyrenean Basin.
The project is focused on the spatial and temporal characterization of the burial remagnetization that affects the lower part of the Southpyrenean Basin, made up by the turbidites of the Hecho Group. In addition to paleomagnetic data, it involves the acquisition of paleothermometric and rock-magnetic data aimed at characterizing the burial conditions and their imprint on the magnetic properties of the remagnized rocks. This information will be combined with the magnetobiochronology of the overlting sequence, made of of the marine and continental sediments of the Pyrenean molasse, whose accummulation rates conditioned burial of the underlying sequence and the kinematics of their remagnetization.
Targets
Burial remagnetizations are common in sedimentary basins subjected large subsidences, and compromise the obtention of primary paleomagnetic directions from which key information on their chronology and tecto-sedimentary evolution is obtained. The Southpyrenean Basin is affected by a burial remagnetization that, as oppossed to other world-known cases, such as those occurred during the normal Cretacous or reversse Permian superchrones, was acquired during a period in which the Earth´s magnetic field switched its polarity. The Southpyrenean Basin offers, thus, a unique opportunity to unravel the kinematics of the remagnetization by combining paleomagnetic, geochronologic and paleothermometric data of the remagnetized succession with a high-resolution magnetobiochronology of the overlying sedimentary dequence, that drove its burial.
Activities
WP 1
Characterizing the spatial and temporal extent of the burial remagnetization that affects the Hecho Group
This activity aims at characterizing, based on paleo- and rock-magnetic methods, the geographical and temporal extent of the burial remagnetization that affetcs the turbiditic succession of the Hecho Group in the Southpyrenean Basin.
WP 1
Characterizing the spatial and temporal extent of the burial remagnetization that affects the Hecho Group
This activity aims at estimating, based on Raman spectrometry of carbonaceous materia and mineralogical data, the burial temperatures that affect the different stratigraphic interval of the Hecho Group.
WP 2
Magnetobiochronology of the overlying sedimentary sequence
This activity aims at dating, based on magneto- and biostratigraphic methods, of the sedimentary succession overlying the Hecho Group, with the aim of establishing the conditions and chronology of its burial.
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