The PhD project is focused generally on the reconstruction of past climate changes, but more particularly on the anthropogenic impacts on ecosystems from the Gallo-Roman period to the 20th century, by coupling geochemistry analysis (trace elements, stables isotopes) and dating methods on carbonate deposits (speleothems, tufa) with investigations in geo-historical archives (ancient maps, documentary sources) on landscape mutations for the last centuries. On one hand, Investigations in geo-historical archives on land use in Normandy is envisaged by focusing on the construction of a spatial database (GIS) based on archaeological, historical sources, old maps and aerial photos for several sites. The objective is to reveal a general trend of the landscape evolution in Normandy for the last centuries. On the other hand, the candidate will investigate the potential of speleothems to serve as high-resolution coupled archives for past climate and ecosystem conditions. Several speleothems and tufa will be analysed at several resolution levels (annual, decadal, multi-centennial) using geochemical analysis and dating methods (U/Th, C14). A particular focus will be on reconstructing anthropogenic impact for the late Holocene period and paleo-pollutions trends (Pb, S) over a more recent period.
Plus d’informations :
[Télécharger l'annonce - PDF 170 Ko]