Pseudopaleosecular variation due to remanence anisotropy in a pyroclastic flow succession - INRA - Institut national de la recherche agronomique Accéder directement au contenu
Article Dans Une Revue Geophysical Research Letters Année : 2002

Pseudopaleosecular variation due to remanence anisotropy in a pyroclastic flow succession

Résumé

In order to check the reliability of a paleosecular variation record in a sequence of pyroclastic rocks (Miocene, Sardinia), we measured various types of anisotropy: magnetic susceptibility (AMS), anhysteretic remanent magnetization (AARM) and thermoremanent magnetization (ATRM). The main magnetic carrier is pseudo-single domain titanomagnetite. No general relation appears between the degrees of AMS and AARM, while the degrees of AARM and ATRM are almost identical. Measuring the AARM thus provides a fast and reliable method to correct paleomagnetic deviation in volcanic rocks. Once corrected for anisotropy deviation the apparent scatter of the paleomagnetic directions, mostly on inclination, is drastically reduced.
Fichier principal
Vignette du fichier
2002GL014697.pdf (126.87 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03036447 , version 1 (27-01-2021)

Identifiants

Citer

J. Gattacceca, Pierre Rochette. Pseudopaleosecular variation due to remanence anisotropy in a pyroclastic flow succession. Geophysical Research Letters, 2002, 29 (8), pp.127-1-127-4. ⟨10.1029/2002GL014697⟩. ⟨hal-03036447⟩
25 Consultations
98 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More