Surface vitrification caused by natural fires in Late Pleistocene wetlands of the Atacama Desert

Pierrick Roperch (1) , Jérôme Gattacceca (2) , Millarca Valenzuela (3) , Bertrand Devouard (4) , Jean-Pierre Lorand (5) , César Arriagada (6) , Pierre Rochette (2) , Claudio Latorre (7) , Pierre Beck (8)

1 GR - Géosciences Rennes
2 CEREGE - Centre européen de recherche et d'enseignement des géosciences de l'environnement
3 UC - Catholic University of Chile
4 AMU - Aix Marseille Université
5 LPG - Laboratoire de Planétologie et Géodynamique [UMR 6112]
6 FCFM - Departamento de Geologia
7 IEB - Instituto de Ecología y Biodiversidad
8 LST - Laboratoire de Sciences de la Terre

! Paleomagnetic laboratory-Geosciences Rennes-Measurements by P. Roperch ! Equipments 2G magnetometer-Molspin spinner-Agico JR6 ! 2G one measurement between two zeros : code C1 ! 2G four measurements between two zeros : code C4 ! Molspin spinner 6 positions : code Mo ! Jr6a spinner automated mode : code Ja ! Jr6/Jr5 spinner 2 positions : code J2 ! First measurement (or NRM) code N0, F0 or D0 in most cases ! MMTD Furnace for thermal demagnetization ! codes D+ and D-indicate that sample orientation changed in the furnace between ! two steps along +Z and-Z ! AF 2G Online three axis F+ = sequence coils X,Z,Y, F-= sequence coils Y,Z,X ! FX = after demagnetization along X; ! FY = along Y, FZ = along Z; combine FX,FY and FZ to remove GRM

Domaines: Sciences de la Terre; Planète et Univers [physics]; Sciences de l'environnement

Pierrick Roperch, Jérôme Gattacceca, Millarca Valenzuela, Bertrand Devouard, Jean-Pierre Lorand, et al.. Surface vitrification caused by natural fires in Late Pleistocene wetlands of the Atacama Desert. Earth and Planetary Science Letters, 2017, 469, pp.15-26. ⟨10.1016/j.epsl.2017.04.009⟩. ⟨hal-02889687⟩