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- W2024259097 abstract "Nine basic dykes were sampled near Angmagssalik, east Greenland. Specimens have been treated by alternating field demagnetization in 11 steps up to 3000 (peak) oersted (300 mT). The ‘cleaned’ direction at all sites is recognized after treatment at 150 oersted. All specimens are reversely magnetized. The mean of the site mean directions has declination = 182°.0, inclination = −66°.9, it = 45, α95 = 7°.7. This direction yields a palaeomagnetic pole (reversed) at 73°.4N, 139°.5E (dp = 10°.7, dm = 12°.9) which is near, but significantly different from, that derived from lower Tertiary rocks in Greenland, namely 63°.2N, 184°.6E (A95 = 4°.5). K-Ar ages of the nine dykes, based upon whole-rock and mineral separates, range from mid-Tertiary to Cambrian. It is impossible to reconcile these ages with the palaeomagnetic results. The palaeomagnetic evidence, supported by geological inference, suggests that all nine dykes are members of the east Greenland lower Tertiary dyke swarm, designated THOL1, of probable age c. 52 Ma. The difference between the poles given above can be explained by supposing that the sampling area has tipped about a horizontal axis directed along 013°/193°, the angle of rotation being 13° (± 11°) anti-clockwise, when the axis is viewed along 013°. This local effect could have been due to block faulting when the north-east Atlantic started to open, or may be attributed to upwarping of the coast due to the weight of the ice-cap inland." @default.
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- W2024259097 date "1982-05-01" @default.
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- W2024259097 title "Palaeomagnetism of nine dated Phanerozoic dykes in south-east Greenland" @default.
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- W2024259097 doi "https://doi.org/10.1111/j.1365-246x.1982.tb04954.x" @default.
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