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|Title: ||U-Pb geochronology of the El Jadida rhyolite and relation to possible Lower Cambrian recycling (Coastal block, Moroccan Meseta).|
|Authors: ||Pereira, M.F.|
El Houicha, M.
El Attari, A.
|Issue Date: ||Mar-2018|
|Citation: ||Pereira, M.F-., Jouhari, A., El Houicha, M., Gama, C., Ezzouhairi, H., El Attari, A., Fekkak, A. Ennih, N., Silva, J.B., 2018. U-Pb geochronology of the El Jadida rhyolite and relation to possible Lower Cambrian recycling (Coastal block, Moroccan Meseta). First International Congress on Geosciences (ICG1) -Joint Congress CAAWG9 - AIC2 - ICGAME3, 20-24 March 2018 El Jadida – Morocco. Abstract book pp. 176-179.|
|Abstract: ||The El Jadida (Mazagan) dome, whose existence was reported as early as 1934 by
Yovanovitch and Freys, constitutes one of the first outcrops of the Moroccan Meseta where
the Precambrian (PIII?)-Paleozoic (Lower Cambrian?) boundary was established (Gigout,
1951; Cornée et al., 1984). Since then, it is listed as one of the few locations where the
basement of the Moroccan Variscan belt can be observed (Hoepffner et al.. 2005; Michard et
al., 2010).Despite, the absence of geochronological and biostratigraphic precise data to
constrain the time interval recorded here, there are stratigraphic similarities that allow a
correlation with the Ediacaran-Cambrian geological record of Anti-Atlas belt (Cornée et al.,
1984). In this study, we developed a petrographic, geochemical and U-Pb geochronological
study using zircon extracted from: (i) the El Jadida rhyolite with the aim of characterizing the magma source and estimate the age of crystallization; (ii) a microbreccia sampled at the base
of the El Jadida Dolomitic Formation for determining provenance.|
|Appears in Collections:||GEO - Comunicações - Em Congressos Científicos Internacionais|
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