Multi-proxy analysis of sediment cores from Lake Peixinho (Azores archipelago, Portugal)

• Main Authors: Raposeiro, Pedro Miguel, Hernández, Armand, Pla-Rabes, Sergi, Gonçalves, Vítor, Bao, Roberto, Sáez, Alberto, de Boer, Erik J, Pimentel, Christopher, Marques, Helena, Vilagut, Violeta, Ricther, Nora, Gordon, Verónica, Yongsong, Huang, Giralt, Santiago
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Accumulation rate; 5α-stigmastan-3β-ol; 5β-cholestan-3β-ol; coprophilous fungi spores; macrophytes seeds; polycyclic aromatic hydrocarbons; Aerophilous diatoms; Age; Arboreal pollen; Azores; Azores Archipelago; Carbon; organic; total; total/Nitrogen; total ratio; Charcoal; flux; Chironomid analysis (Brooks et al; 2007); Chironomini; Chromatography; Core; Diatom analysis (Battarbee; 1986; in Berglund; Handbook of Holocene Pal.); Diatoms; benthic; planktic; tychopelagic; Mass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS; multiproxy; Nitrogen; oceanic island; Orthocladiinae; Peixinho_lake_2015; Pollen; herbs; Berglund; North Atlantic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.933440

The Azores archipelago is a group of nine oceanic volcanic islands located in the mid-North Atlantic, roughly 1500 km from Europe and 1900 km from America. Lake Peixinho located in Pico island 14m of maximum depth and is located at 874m above sea level. A coring campaign was conducted in June 2015 using a 60mm diameter UWITEC gravity corer from UWITEC floating platform retrieving a core (2.53 m long) located in the deepest part of the lake. The core was dated using ¹⁴C and produced a multi-proxy dataset of geochemical and biological analyses that we used to uncover paleoenvironmental changes on Lake Azul in the last 1500 years.