Glaucony authigenesis, maturity and alteration in the Weddell Sea: An indicator of paleoenvironmental conditions before the onset of Antarctic glaciation

• Published in: Scientific Reports
• Main Authors: López-Quirós, Adrián, Escutia, Carlota, Sánchez Navas, Antonio, Nieto, F., García-Casco, Antonio, Martín Algarra, A., Evangelinos, Dimitris
• Other Authors: Ministerio de Ciencia e Innovación (España), European Commission, Junta de Andalucía
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Nature Publishing Group 2019
• Subjects: Antarctic; Salas; Weddell; Weddell Sea; Antarc*; Antarctica
• Online Access: http://hdl.handle.net/10261/205258; https://doi.org/10.1038/s41598-019-50107-1; https://doi.org/10.13039/501100000780; https://doi.org/10.13039/501100004837; https://doi.org/10.13039/501100011011

Three types of glaucony grains were identified in the late Eocene (~35.5-34.1 Ma) sediments from Ocean Drilling Program (ODP) Hole 696B in the northwestern Weddell Sea (Antarctica). The grains are K2O-rich (~7 wt%) and formed by smectite-poor interstratified ~10 Å glauconite-smectite with flaky/rose...