Bibliographic citations
Tirado, E., (2025). Distribución y comportamiento del Co, Cr, Cu, Fe, Mg, Mn, Ni, Ti, V y Zn en las aguas y sedimentos de la ensenada Ezcurra, bahía Almirantazgo, Antártida – Indicadores del retroceso glaciar [Pontificia Universidad Católica del Perú]. http://hdl.handle.net/20.500.12404/29683
Tirado, E., Distribución y comportamiento del Co, Cr, Cu, Fe, Mg, Mn, Ni, Ti, V y Zn en las aguas y sedimentos de la ensenada Ezcurra, bahía Almirantazgo, Antártida – Indicadores del retroceso glaciar []. PE: Pontificia Universidad Católica del Perú; 2025. http://hdl.handle.net/20.500.12404/29683
@misc{renati/1665438,
title = "Distribución y comportamiento del Co, Cr, Cu, Fe, Mg, Mn, Ni, Ti, V y Zn en las aguas y sedimentos de la ensenada Ezcurra, bahía Almirantazgo, Antártida – Indicadores del retroceso glaciar",
author = "Tirado Romero, Eduardo Jesús",
publisher = "Pontificia Universidad Católica del Perú",
year = "2025"
}
The Ezcurra inlet (Admiralty bay, King George island, west Antarctica) presents a context of the generation of acid rock drainage (ARD), produced by the oxidation of pyrite belonging to the outcrops exposed after the glacial retreat in the continental mass of Cardozo cove. This drainage flows into the waters of the inlet through runoff and groundwater, providing an important input of Fe, which correlates with greater phytoplankton production close to the source. The geochemical results in the water column, pore water of the sediments and in the sediments themselves have shown the presence of Co, Cr, Cu, Fe, Mg, Mn, Ni, Ti, V and Zn. The high concentrations of these elements, except Cu and Zn, correlate with a marked lithological change in the sediment at 90 cm depth, where an increase in organic matter, iron oxides and hydroxides, and the presence of framboidal pyrite above 90 cm are observed, indicating the beginning of the DAR and with it the glacial retreat. According to the previously proposed sedimentation rate of the Ezcurra inlet (0.33 cm/year), ARD would have started approximately 273 years ago, correlating with the context of the Industrial Revolution. The input of Fe would contribute to the precipitation of framboidal pyrite in the sediment in a context of reduced microenvironments through the bacterial sulfate reduction process. Before the exposure to oxidation, high-temperature minerals such as chlorite, epidote and primary pyrite evidence hydrothermal mineralization in the continental mass of the inlet, deposited by glacial erosion in the sediments below 90 cm depth.
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