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Geochemistry of Carboniferous Sandstones (Sardar Formation), East-Central Iran: Implication for Provenance and Tectonic Setting 被引量:7
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作者 mohammad KHANEHBAD Reza MOUSSAVI-HARAMI +2 位作者 Asadollah MAHBOUBI Mehdi NADJAFI mohammad hosein mahmudy gharaie 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2012年第5期1200-1210,共11页
Geochemical analysis of sandstones from the Sardar Formation (from two stratigraphic successions) in east-central Iran were used for identification of geochemical characterization of sandstones, provenance and tecto... Geochemical analysis of sandstones from the Sardar Formation (from two stratigraphic successions) in east-central Iran were used for identification of geochemical characterization of sandstones, provenance and tectonic setting. Sandstones in the two lithostratigraphic successions have similar chemical compositions suggesting a common provenance. Bulk-rock geochemistry analysis of Carboniferous sandstones from Sardar Formation indicates that they are mainly quartz dominated and are classified as quartzarenites, sublitharenites and subarkoses, derived from acid igneous to intermediate igneous rocks. Discrimination function analysis indicates that the sandstones of Sardar Formation were derived from quartzose sedimentary provenance in a recycled orogenic setting. Also, major and trace elements in sandstones of Sardar Formation (e.g., K2O/Na2O vs. SiO2 ) indicate deposition in a stable passive continental margin (PM). Chemical index of alteration (CIA) for these rocks (65%) suggests a moderate to relatively high degree of weathering in the source area. 展开更多
关键词 PROVENANCE CARBONIFEROUS tectonic setting GEOCHEMISTRY Sardar Formation Iran
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