Possible origins of Permian remagnetizations in Devonian and Carboniferous limestones from the Moroccan Anti-Atlas (Tafilalet) and Meseta

Details Possible origins of Permian remagnetizations in Devonian and Carboniferous limestones from the Moroccan Anti-Atlas (Tafilalet) and Meseta Possible origins of Permian remagnetizations in Devonian and Carboniferous limestones from the Moroccan Anti-Atlas (Tafilalet) and Meseta

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pepi...52..339s&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 52, Issue 3-4, p. 339-351.

Physics

8

Scientific paper

Permian overprints have been recognized for several years in different regions of the Hercynian chain. This process seems to affect not only large internal parts, but also external zones of the chain. Devonian limestones sampled in the Tafilalet and Maider massifs near Erfoud and Msissi reveal a strong Permian component carried mainly by magnetite. Scanning Electron Microscope (SEM) and X-ray investigations were performed in order to unravel the origin of this magnetite. Permian remagnetizations are also present in Visean limestones from the Meseta. Isothermal Remanent Magnetization studies and SEM analysis of magnetic separates show that this magnetization is carried mainly by pyrrhotite which could be a result of oxidation of pre-existing pyrite.

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