Revised stratigraphic framework for the lower Anti-Atlas Supergroup based on U–Pb geochronology of magmatic and detrital zircons (Zenaga and Bou Azzer-El Graara inliers, Anti-Atlas Belt, Morocco)
نویسندگان
چکیده
منابع مشابه
geochemical and mineralogical characteristics of serpentinite and carbonated serpentinite: case of magnesite (bou azzer inlier, central anti-atlas, morocco)
ultramafic rocks are essentially constituted by silicates of magnesium: forsterite, and/or diopside-enstatite; who’s the most common hydrothermal alteration are the serpentinization. to bou azzer, the serpentinisation affected almost all of the ultrabasic rocks. among the phenomena bound to the serpentinisation observed on the ground, we distinguish the magnesium deposits (carbonated serpentini...
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the serpentinization of the harzburgitic mantle section of the bou azzer neoproterozoic ophiolite is studied by field mapping, structural observations, optical micrography, sem and x-ray diffractometry, and relationships with co, ni, cr and sulphides minerals are discussed. serpentinization occurred in two major steps with, i) intra-oceanic pseudomorphic serpentinization materialized by the iso...
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We present a ,,13C record from the Anti-Atlas mountains of Morocco and place it in the context of a detailed regional tectonostratigraphy. We place the lithoand chemostratigraphic record in a temporal framework using precision U-Pb zircon geochronology of ashes interbedded with the same carbonate units that provide "l3C data. The variations in "l3C of carbonate occur on a wide range of time sca...
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Due to rising demand for traditional complementary and alternative medicine (TCAM) globally, international ministerial groups and professional bodies have been calling for a global perspective on policy and a means for countries to share information and policy initiatives with one another. The WHO Global Atlas is designed to: assess the status of development of the sector; plan for further deve...
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ژورنال
عنوان ژورنال: Journal of African Earth Sciences
سال: 2020
ISSN: 1464-343X
DOI: 10.1016/j.jafrearsci.2020.103946