Inferring centennial terrigenous input for Patos Lagoon, Brazil: the world's largest choked coastal lagoon

摘要: This study introduces and discusses inorganic geochemical data from Patos Lagoon, the world’s largest choked coastal lagoon located in southern Brazil. Here, we characterise sedimentary environment using different elemental ratios to assess influence of both anthropogenic activities natural hydrological regime on contemporary record. Three sediment cores collected freshwater domain Lagoon were analysed. Elements Al, Ca, Cr, Fe, K, Sr, Ti V determined by inductively coupled plasma optical emission spectrometry (ICP-OES). Strong correlations between Sr together with lack correlation detrital elements suggested that carbonate precipitation is particularly important this system. Lithogenic Fe reflected Guaiba River sequences Lagoon. The K/Al ratio was used investigate changes weathering patterns Ti/Al evaluate grain size changes. Ti/Ca provided an excellent proxy for inferring historical wetter drier conditions, also appears be sensitive ENSO events. Finally, V/Cr prevailing reducing conditions bottom sediments. Overall, our findings show processes weathering, transport deposition are mostly related process, given large system, dilution could play role attenuating human impacts.