The potential for a continuous 10Be record measured on ice chips from a borehole ...

• Main Authors: Nguyen, Long, Paleari, Chiara I., Müller, Stefanie, Christl, Marcus, Mekhaldi, Florian, Gautschi, Philip, Mulvaney, Robert, Rix, Julius, Muscheler, Raimund
• Format: Article in Journal/Newspaper
• Language: English
• Published: ETH Zurich 2021
• Subjects: AMS; sample preparation; Beryllium 10; Ice core; Solar activity; Antarc*; Antarctica; East Antarctica; ice core
• Online Access: https://dx.doi.org/10.3929/ethz-b-000527992; http://hdl.handle.net/20.500.11850/527992

Ice cores are excellent archives for obtaining long and continuous 10Be records. However, traditional ice core 10Be measurements required a lot of ice (0.5–1kg) and often needed to be connected to a large and costly ice core project. These reasons have been the factors limiting the number and variety of 10Be projects and data. In this paper, we show measurements of 10Be on small samples (∼45g) of continuous auger ice chips from a borehole at Little Dome C (LDC), East Antarctica. The sample preparation method for 10Be accelerator mass spectrometry (AMS) was tested and optimized using test samples (∼50g) including well-mixed surface ice chips from the LDC site, snow collected in Lund (Sweden) and frozen Milli-Q water. The results show that our small ice samples should be processed without ion exchange filtration of the melt water and cleaning the subsequent Be(OH)2 precipitate. In addition, co-precipitating Be with Fe led to more reproducible measurement currents and offer the potential for higher efficiency ... : Results in Geochemistry, 5 ...