Mathian M. auteur aut IRD Aufort J. auteur aut IRD Braun Jean-Jacques auteur aut IRD Riotte Jean auteur aut IRD Selo M. auteur aut IRD Balan E. auteur aut IRD Fritsch Emmanuel auteur aut IRD Bhattacharya S. auteur aut IRD Allard T. auteur aut IRD text journalArticle eng text/pdf born digital access Secondary minerals in soils can record climatic changes affecting continental surfaces over geological times. Their dating should refine our present knowledge about their potential periods of formation as well as their relations with the ongoing change of climate and erosion/weathering regimes. In the present study, twenty kaolinite samples from two lateritic profiles of the Karnataka plateau, an intensively studied area in the southern India, have been dated using electron paramagnetic resonance (EPR) spectroscopy. Kaolinite ages vary between 0.229(+/- 0.24) Ma to 40.73(+/- 15.37) Ma. Four different groups of age can be identified with ages clustered around 1.0, 3.5, 9.0 and 39.0 Ma. These groups of age indicate local preferential weathering periods that coincide with distinct Indian climatic events described in independent studies, such as monsoon strengthening. Thus, regional or subcontinental factors likely prevailed over global forcing in the imprint of climatic events in the regolith profiles. These results confirm that despite their simple mineralogy, laterites can contain several relictual and coexisting generations of secondary minerals and that EPR dating of kaolinite contributes to unraveling the complex history of continental surfaces over geological periods. specialized Weathering Laterite EPR dating Kaolinite Indian monsoon INDE 064 068 021 69 89-105 2019 1342-937X https://www.documentation.ird.fr/hor/fdi:010077021 10.1016/j.gr.2018.12.003 1342-937X [F B010077021] https://www.documentation.ird.fr/hor/fdi:010077021 https://www.documentation.ird.fr/intranet/publi/2019/10/010077021.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2019-11-05 2025-02-24 fdi:010077021 fre