Big Ben: a new wide-bore piston corer for multi-proxy palaeolimnology |
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Authors: | Ian R Patmore Carl D Sayer Ben Goldsmith Thomas A Davidson Ruth Rawcliffe Jorge Salgado |
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Institution: | 1. Department of Geography, University College London, Gower Street, London, WC1E 6BT, UK 2. Environmental Change Research Centre, Department of Geography, University College London, Gower Street, London, WC1E 6BT, UK 3. Department of Bioscience, Aarhus University, Vejls?vej 25, 8600, Silkeborg, Denmark
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Abstract: | We present a design for a large diameter piston corer, deployed from a raft that is suitable for use in shallow lakes. The piston corer, known as Big Ben, consists of a core tube, a piston on a rope and a corer head, to which rods are attached to drive the tube into the sediment. A core catcher, which aids the support of the core tube when full of sediment, has been incorporated into the design. To extrude the sediment, a framework has been designed to keep the core tube upright and stationary and a modified bottle jack is used to push the piston upwards during the extrusion process. The practical operation of the Big Ben coring system from setting up a coring platform to collecting and safely extruding a core is detailed. Finally we summarise recent experiences of deploying the corer and highlight its potential uses in the developing field of multi-proxy palaeolimnology. |
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