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- W2774965082 abstract "To evaluate the role of subducted oceanic crust in the genesis of potassium-rich magmas, we report high-precision Mg isotopic data for a set of Cenozoic volcanic rocks from Northeast China. These rocks overall are lighter in Mg isotopic composition than the normal mantle and display considerable Mg isotopic variations, with δ26Mg ranging from −0.61 to −0.23. The covariation of δ26Mg with TiO2 in these rocks suggests that their light Mg isotopic compositions were derived from recycled oceanic crust in the form of carbonated eclogite in the source region. The strong correlations between δ26Mg and (Gd/Yb)N ratio as well as Sr-Pb isotopes further indicate a multicomponent and multistage origin of these rocks. Magnesium isotopes may thus be used as a novel tracer of recycled oceanic crust in the source region of mantle-derived magmas." @default.
- W2774965082 created "2017-12-22" @default.
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- W2774965082 date "2017-01-01" @default.
- W2774965082 modified "2023-10-16" @default.
- W2774965082 title "MAGNESIUM ISOTOPIC EVIDENCE FOR ANCIENT SUBDUCTED OCEANIC CRUST IN LOMU-LIKE POTASSIUM-RICH VOLCANIC ROCKS" @default.
- W2774965082 doi "https://doi.org/10.1130/abs/2017am-304699" @default.
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