Abstract
The Triassic arkoses occur as thin pedimentar layers which mantle the granitic basement of the Haute Moulouya Province (Morocco); they are accumulated in paleodepressions of tectonic origin. They host an irregularly scattered PbBa mineralization. A previously PbBa enriched orthoclase-adularia-rich detrital fraction is recognized as the source of metals. Afterwards, together with silica and adularia vuggy overgrowth, metals were trapped in the arkosic cement. This peculiar distribution results from a sequence of leaching and clogging stages related to the variation of level of a sulphate-rich water-table. The metal concentration begins with the mechanical deposition of a clastic component under a warm and arid climate; then, the intrapedimentar drainage the effects of which iscontrolled by the paleotopography of the basement is responsible for the nature and the distribution of the chemical species (especially for the ores) which are precipitated into the arkosic cement. This peculiar temporal and spatial organization is strongly dependent on the nature of the secondary cement in the arkoses and typically has a diagenetic signature.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
