Browsing by Autor "Pierre Sabatier"
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Item type: Item , Holocene variations in Lake Titicaca water level and their implications for sociopolitical developments in the central Andes(National Academy of Sciences, 2023) Stéphane Guédron; Christophe Delaere; Sherilyn C. Fritz; Julie Tolu; Pierre Sabatier; Anne-Lise Devel; Carlos Heredia; Claire Vérin; Eduardo Queiroz Alves; Paul A. BakerHolocene climate in the high tropical Andes was characterized by both gradual and abrupt changes, which disrupted the hydrological cycle and impacted landscapes and societies. High-resolution paleoenvironmental records are essential to contextualize archaeological data and to evaluate the sociopolitical response of ancient societies to environmental variability. Middle-to-Late Holocene water levels in Lake Titicaca were reevaluated through a transfer function model based on measurements of organic carbon stable isotopes, combined with high-resolution profiles of other geochemical variables and paleoshoreline indicators. Our reconstruction indicates that following a prolonged low stand during the Middle Holocene (4000 to 2400 BCE), lake level rose rapidly ~15 m by 1800 BCE, and then increased another 3 to 6 m in a series of steps, attaining the highest values after ~1600 CE. The largest lake-level increases coincided with major sociopolitical changes reported by archaeologists. In particular, at the end of the Formative Period (500 CE), a major lake-level rise inundated large shoreline areas and forced populations to migrate to higher elevation, likely contributing to the emergence of the Tiwanaku culture.Item type: Item , Late Holocene volcanic and anthropogenic mercury deposition in the western Central Andes (Lake Chungará, Chile)(Elsevier BV, 2019) Stéphane Guédron; Julie Tolu; Élodie Brisset; Pierre Sabatier; Vincent Perrot; Sylvain Bouchet; Anne‐Lise Develle; Richard Bindler; Daniel Cossa; S. C. FritzItem type: Item , Late Hololocene mercury deposition history in Lake Chungara (4500 m. a.s.l., Chile): Influence of volcanic eruptions and changes in Paleolimnoecology(2017) Stéphanie Guédron; Julie Tolu; Élodie Brisset; Pierre Sabatier; Anne‐Lise Develle; Sylvain Bouchet; Richard Bindler; A Dominic; Sherilyn C. Fritz; Paul A. BakerInternational audienceItem type: Item , Reconstructing two millennia of copper and silver metallurgy in the Lake Titicaca region (Bolivia/Peru) using trace metals and lead isotopic composition(Elsevier BV, 2021) Stéphane Guédron; Julie Tolu; Christophe Delaere; Pierre Sabatier; Julien Barré; Carlos Heredia; Élodie Brisset; Sylvain Campillo; Richard Bindler; Sherilyn C. Fritz