The role for carbonated melt-lithosphere mantle interaction in alkaline basalt origin

Here we report a suite of alkaline volcanic rocks from the South Qinling region of central China, ranging from carbonated silicate melts to evolved alkali basalts. Detailed data include: whole-rock major-trace elements and Sr-Nd isotopes, carbonate C isotopes, clinopyroxene major elements and O isotopes, Zircon U-Pb ages. Whole-rock major element analyses were carried out at University of Science and Technology of China in Hefei. Whole-rock trace element data were obtained from Wuhan Sample Solution Analytical Technology Company in Wuhan, China. Whole-rock Rb-Sr and Sm-Nd analyses were performed using Neptune MC-ICP-MS at University of Science and Technology of China in Hefei. Carbonate C isotope was conducted using a Thermo Fisher Scientific MAT253 magnetic sector mass spectrometer, coupled with an online Finnigan Gasbench II interface at University of Science and Technology of China in Hefei. Clinopyroxene major elements were analyzed on polished thin sections by Shimazu EPMA 1600 electron microprobe (EMP) at CAS Key Laboratory of Crust-Mantle Materials and Environments in USTC, China. Clinopyroxene O isotope analyses were performed using laser fluorination with a 25 W CO2 laser MIR-10 at University of Science and Technology of China in Hefei.