depositional environment and provenance of the shurijeh formation sandstones (neocomian) in the abgarm village, east of kopet-dagh basin
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abstract
in this study, depositional environment and provenance of sandstones of the surijeh formation (lower cretaceous) in the abgarm section in the kopet-dagh basin are investigated. analysis of sedimentary facies in this section shows that there are two clastic (continental and coastal plain) and two carbonate (coastal plain) facies associations are present. the results of modal analysis and geochemical data show that siliciclastic sediments are derived from recycled orogenic and quartzose sedimentary source rock (recycled orogen). the use of discriminant function diagrams shows these sandstones plotted in the passive continental margin. chemical index of alteration (cia) for these rocks suggests a moderately high chemical weathering of the source terrains. the geochemical results are very similar to petrographicl data that show semi-humid to semi-arid climate conditions.
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Journal title:
رخساره های رسوبیجلد ۷، شماره ۱، صفحات ۱۴۹-۰
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