The Msissi norite revisited - K/Ar dating, petrography and paleomagnetism

Details The Msissi norite revisited - K/Ar dating, petrography and paleomagnetism The Msissi norite revisited - K/Ar dating, petrography and paleomagnetism

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13..741s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 13, Aug. 1986, p. 741-743. Research supported by the Institut National des S

Mathematics

Logic

14

Geomagnetism, Mineralogy, Paleomagnetism, Petrography, Radioactive Age Determination, Argon Isotopes, Biotite, Gabbro, Morocco, Potassium Isotopes

Scientific paper

The 'Msissi norite' in Morocco (30.93 deg N, 4.71 deg W), from where one of the paleomagnetic reference pole for Africa in Devonian times has been derived, has been revisited and dated. Petrological examination shows that the rock is an alkaline gabbro (teschenite). K-Ar analyses on fresh biotite yield a 136-139 Ma age, which infirms the supposed Devonian age. The paleomagnetic study displays several distinct magnetic components.

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