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Subduction of carbonated sediments is the principal mechanism for the replenishment of mantle carbon reservoirs, but the processes of transport of carbonated sediments into the mantle and their incorporation into mantle chemical and isotopic heterogeneities are poorly constrained. Here we use in-situ major and trace element and Sr isotopic compositions and mineral Sr-Nd isotopes of the peridotite...
Subduction and collision are the key processes triggering geochemical refertilization of the lithospheric mantle beneath cratons. However, the way that the subducted plate influences the cratonic lithospheric mantle remains unclear. Here, in-situ major and trace-element and Sr isotopic compositions of peridotite and pyroxenite xenoliths carried by the Dongbahao Cenozoic basalts, located close to the...
The trace element, Li and Sr isotopic compositions of major minerals in peridotite xenoliths from Kuandian, North China Craton (NCC) were analyzed in situ to investigate Pacific slab subduction-related mantle modification beneath the eastern NCC. The 87 Sr/ 86 Sr ratios (0.70282–0.70553) are positively correlated with the La/Nb and U/Nb ratios for clinopyroxenes (Cpx). Based on the...
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