@ARTICLE{10.21494/ISTE.OP.2023.0964, 

TITLE={The carbonate deposits of the Poitiers-Fleury aqueduct (Vouneuil-sous-Biard, 86): an unstable hydro-sedimentary dynamic recording?}, 
  
AUTHOR={Christophe DURLET, Jérôme BRENOT, Éric PHILIPPE, Julien CURIE, Pierre-Alexandre TEBOUL, Théophile COCQUEREZ, Ludovic BRUNEAU, }, 
	
JOURNAL={Archaeology, Society and Environment}, 
	
VOLUME={1}, 

NUMBER={Issue 1}, 
	
YEAR={2023}, 

URL={https://www.openscience.fr/The-carbonate-deposits-of-the-Poitiers-Fleury-aqueduct-Vouneuil-sous-Biard-86}, 
	
DOI={10.21494/ISTE.OP.2023.0964}, 
	
ISSN={2752-4507}, 
	
ABSTRACT={Archaeological investigations conducted on an ancient aqueduct supplying the antique town of Poitiers, western France, in the municipality of Vouneuil-sous-Biard (86), has uncovered a 20 cm thick calcitic crust on walls of a buried channel. Two types of facies alternate in this crust. In the lower crust laminae are mostly comparable to speleothems that would be derived from relatively pure karstic waters. The mid and upper parts of the crust are influenced by microbial communities and probably derived from capture of surface streams rich in organic matter. The δ18O and δ13C values of these two facies, formed in a dark drain with little seasonal temperature variation, are intermediate between those expected for pure speleothems and tufa deposits. Alternance of very thin dark and light laminae exist, especially at the base of the crust. This may represent annual growths, but isotopic and petrographic existing data do not prove this hypothesis which would need further geochemical investigations.}}