Note on the palaeomagnetism of the Sekondi series, Ghana

Details Note on the palaeomagnetism of the Sekondi series, Ghana Note on the palaeomagnetism of the Sekondi series, Ghana

Jun 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973pepi....7..217b&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 7, Issue 2, p. 217-218.

Physics

2

Scientific paper

From a collection of 39 oriented hand-samples at 16 sites, total N.R.M. directions at 12 sites from the Elmina Sandstone (Devonian or possibly Carboniferous) of the Ghana coast fall in a group. Their in-situ mean (D = 334°, I = +111/2°) is significantly divergent from the local geomagnetic field, and does not correlate with expected Palaeozoic remanence directions. A bedding-tilt test suggests that the magnetisation is secondary, and comparison with other African data suggests a Mesozoic (possibly Cretaceous) age. The remanence is only partially stable against thermal demagnetisation. The observations are consistent with a remanence originating at the time of faulting, tilting and uplift which marked the beginning of rifting of South America from Africa.

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