Extended Data Fig. 6: Effects of lithospheric contamination.
From: Widespread two-layered melt structure in the asthenosphere
a, Plot of Y/Yb versus Yb for basalts, diamondiferous kimberlites and spinel-facies peridotite xenoliths enclosed in Cenozoic basalts from the eastern NCC. The horizontal shaded areas represent the upper and lower bounds based on mean values ± 1 SD. The dark red curves are trends showing basaltic melts contaminated by lithospheric mantle with the composition of spinel-facies peridotites from the eastern NCC. The above modelling indicates that the low Y/Yb basaltic melts did not originate from lithospheric contamination of a high Y/Yb basaltic melt. b, εHf and εNd values of basalts and spinel-facies peridotite xenoliths. εHf and ΔHf values of basalts and diamondiferous kimberlites are also shown. ΔHf = εHf – (1.59εNd + 1.28). R2, correlation coefficient. Data sources: primitive mantle21 and peridotite xenoliths in Cenozoic basalts84 from the eastern NCC; the mantle array line: εHf = 1.59εNd + 1.2897. Full data of the North China basalts and Mengyin diamondiferous kimberlites are provided in Supplementary Table 2.
