A new conglomerate test in palaeomagnetism

Details A new conglomerate test in palaeomagnetism A new conglomerate test in palaeomagnetism

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998geoji.133..721s&link_type=abstract

Geophysical Journal International, Volume 133, Issue 3, pp. 721-725.

Physics

5

Scientific paper

The conglomerate test is widely used in palaeomagnetism to date components of natural remanent magnetization with respect to deposition of conglomerates. It has been demonstrated, however, that this test may be positive even if the data are strongly contaminated by a secondary remanence, especially for the commonly used small number of clasts Starkey & Palmer 1970). Here we show with the aid of numerical simulations that different statistical procedures employed in this test have similar low sensitivities to remagnetization. We suggest a new conglomerate test which incorporates additional information on the direction of a secondary palaeomagnetic component which is isolated from either clasts themselves or their host rocks. Numerical simulations show that this new test is about twice as sensitive to remagnetization as the previous procedures and is robust with respect to small errors in the direction of a secondary component.

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