A paleomagnetic and isotopic age for the Wackerfield Dyke of northern England |
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| Authors: | DH Tarling JG Mitchell Henry Spall |
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| Institution: | Department of Geophysics and Planetary Physics, University of Newcastle upon Tyne, Newcastle upon Tyne, England;Environmental Research Laboratories, National Oceanic and Atmospheric Administration (NOAA), Boulder, Colorado, USA |
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| Abstract: | The Wackerfield Dyke is exposed in northern England and its field relationships suggest it could be related to the Eocene Mull Dyke Swarm. Wackerfield Dyke specimens taken from below the zone of surface weathering have a natural remanent magnetization that is extremely stable to thermal and alternating field demagnetization. Stability is expected because the Fe-Ti oxides are highly oxidized. The stable magnetization is identical with a primary remanence that can be isolated from certain samples of the Whin Sill of northern England, and gives a mean pole at 175°E, 22°N (dp = 2°, dm = 3°). An Upper Carboniferous age for the Wackerfield Dyke is confirmed by a K-Ar whole rock age of 303 my. |
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