Authors
Cody Paige, John Gosse, Annina Margreth, Lukas Wacker
Publication date
2018/4
Journal
EGU General Assembly Conference Abstracts
Pages
11489
Description
Applications of cosmogenic 14C produced in minerals or ice on Earth are providing a new frontier in exposure dating and landscape erosion rate studies. In particular, the isotope can avoid problems facing longer-lived, lower production rate isotopes. The Dalhousie C-14 Extraction Line Laboratory (DCELL), the first cosmogenic 14C extraction line in Canada, was completed in January 2017 and is undergoing background and blank tests. Up to 8 g of quartz is melted using LiBO2 flux in an alumina boat to extract cosmogenic 14C. After removal of meteoric CO2 from the boat, flux, and quartz at low temperature (500 C), ultrapure O2 is flowed over the melting quartz aliquot at 1050 C to capture the in situ 14C as 14CO2. The 14CO2 is then purified using temperature-specific Liquid Nitrogen-slush traps to remove SOx, NOx, and other condensable gases, and a high temperature Ag-Cu mesh oxidation. The purified CO2 …
Scholar articles
C Paige, J Gosse, A Margreth, L Wacker - EGU General Assembly Conference Abstracts, 2018