New insights from multi-proxy data from the West Antarctic continental rise: Implications for dating and interpreting Late Quaternary palaeoenvironmental records ...

• Main Authors: Hillenbrand, CD, Crowhurst, SJ, Williams, M, Hodell, DA, McCave, IN, Ehrmann, W, Xuan, C, Piotrowski, AM, Hernández-Molina, FJ, Graham, AGC, Grobe, H, Williams, TJ, Horrocks, Allen, CS, Larter, RD
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier BV 2021
• Subjects: Antarctic Peninsula; Bioturbation; Bottom current; Carbon burn-down; Contourites; Ice-rafted debris; Manganese enrichment; Non-steady-state diagenesis; Sediment drifts; Antarctic; Bellingshausen Sea; Pacific; The Antarctic; Antarc*
• Online Access: https://dx.doi.org/10.17863/cam.78764; https://www.repository.cam.ac.uk/handle/1810/331316

The Antarctic Peninsula's Pacific margin is one of the best studied sectors of the Antarctic continental margin. Since the 1990s, several research cruises have targeted the continental rise with geophysical surveys, conventional coring and deep-sea drilling. The previous studies highlighted the potential of large sediment drifts on the rise as high-resolution palaeoenvironmental archives. However, these studies also suffered from chronological difficulties arising from the lack of calcareous microfossils, with initial results from geomagnetic relative palaeointensity (RPI) dating promising a possible solution. This paper presents data from new sediment cores recovered on cruise JR298 from seven continental rise sites west of the Antarctic Peninsula and in the Bellingshausen Sea with the objectives to (i) seek calcareous foraminifera, especially at shallow drift sites, to constrain RPI-based age models, and (ii) investigate the depositional history at these locations. We present the results of chronological ...