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Deconvolution of u‐channel paleomagnetic data near geomagnetic reversals and short events

The deconvolution scheme of Oda and Shibuya [1996] , designed for half‐core data from the pass‐through magnetometer aboard the Joides Resolution, has been adapted for treatment of u‐channel data. The program was tested using u‐channels from Ocean Drilling Program (ODP) Site 1090. A significant increase in resolution of the u‐channel data can be achieved by deconvolution, resulting in data comparable with that obtained by continuous discrete sampling. Large amplitude changes of the magnetization vector revealed by the deconvolution treatment are in good agreement with the results obtained on discrete samples extracted from the same u‐channels. Application of this procedure to u‐channel data from ODP Sites 983 and 984, over a short time interval around 1.255 Ma, permitted enhanced definition of the so‐called Bjorn geomagnetic event.