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

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. In 2018, a sediment core was recovered from Lake Ginjal on Terceira island. A 3.5 m long sediment core was taken using a Russian chamber corer, 0.5 m long, with 5 cm diameter. Lake Ginjal occupies the bottom of a small crater at 390 m above sea level located in the plains of Achada, the oldest volcanic crater of Terceira island. Its maximum length and width are 120 m and 70 m, respectively, and its maximum water depth is 1 m. 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 550 years.

亚速尔群岛（Azores Archipelago）是坐落于北大西洋中部的9座海洋火山岛群，距欧洲约1500千米，距美洲约1900千米。2018年，研究人员从特塞拉岛（Terceira Island）的金加尔湖（Lake Ginjal）中获取了一根沉积物岩芯。该岩芯总长3.5米，采用长度0.5米、直径5厘米的俄罗斯式舱式采泥器（Russian Chamber Corer）获取。金加尔湖坐落于特塞拉岛最古老的火山口区域——阿查达平原（Achada Plains）内一处海拔390米的小型火山口底部，其最大长度与宽度分别为120米和70米，最大水深为1米。该岩芯通过碳十四（¹⁴C）测年法完成定年，其配套的多代用指标地球化学与生物学分析数据集，被用于重建过去550年间阿苏尔湖（Lake Azul）的古环境演化历史。