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• W1964538887 abstract "Abstract The major, trace and rare earth element (REE) contents of metapelite (MPL), metapsammite (MPS) and metamarl (MM) samples from the Cambro-Ordovician Seydisehir Formation were analyzed to investigate their provenance and tectonic setting. The MPS, MPL, and MM samples have variable SiO 2 concentrations, with average values of 72.36, 55.54, and 20.95 wt%, moderate SiO 2 /Al 2 O 3 ratios (means of 6.88, 3.23, and 3.80), moderate to high Fe 2 O 3  + MgO contents (means of 5.14, 9.55, 3.56 wt%), and high K 2 O/Na 2 O ratios (means of 3.26, 3.64, 2.90), respectively. On average, the chemical index of alteration (CIA) values of the MPS and the MPL are 65.87 and 71.96, respectively, while the chemical index of weathering (CIW) values are 74.54 and 85.09, respectively. These data record an intermediate to high degree of alteration (weathering) of plagioclase to illite/kaolinite in the samples’ provenance. The chondrite-normalized REE patterns of all the sample groups are similar and are characterized by subparallel light rare earth elements (LREE)-enriched, relatively flat heavy rare earth elements (HREE) patterns with pronounced Eu anomalies (mean of 0.69) and moderate fractionation [average (La/Yb) N  = 8.7]. Plots of sediments in ternary diagrams of La, Th, Sc and elemental ratios (La/Sc, Th/Sc, Cr/Th, Eu/Eu*, La/Lu, Co/Th, La/Sc and Sc/Th), which are critical for determining provenance, and REE patterns indicate that the metaclastic units of the Seydisehir Formation were derived dominantly from felsic to intermediate magmatic rocks and not from a mafic source. The La–Sc–Th and Th–Sc–Zr/10 ternary diagrams of the Seydisehir Formation are typical of continental island arc/active continental margin tectonic settings. The geologic location and geochemistry of the Seydisehir Formation suggest that it was deposited in an Andean-type retroarc foreland basin during the Late Cambrian–Early Ordovician period. The Neoproterozoic intermediate to felsic magmatic rocks and metaclastic sediments with felsic origins of the Sandikli–Afyon Basement Complex (SBC) and their equivalent units, which are thought to be overlain by the younger units in the study area, may be the dominant source rocks for the Seydisehir Formation." @default.
• W1964538887 created "2016-06-24" @default.
• W1964538887 creator A5016510595 @default.
• W1964538887 date "2014-06-01" @default.
• W1964538887 modified "2023-09-26" @default.
• W1964538887 title "Geochemistry, provenance and tectonic setting of the Late Cambrian–Early Ordovician Seydişehir Formation in the Çaltepe and Fele areas, SE Turkey" @default.
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• W1964538887 doi "https://doi.org/10.1016/j.chemer.2013.07.002" @default.
• W1964538887 hasPublicationYear "2014" @default.
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