MsoNormal style="MARGIN: 0cm 0cm 0pt"> hDivSummary name="EnDivSummary">Zircon U-Pb age, major and trace elements, REE,Sr-Nd-Pb, and zircon Hf isotope compositions were discussed for the Mesozoic Tongjing diorite porphyry in Yinan area of western Shandong Province. The results show that the Tongjing diorite porphyry is characterized by high SiO2(54.68%~63.01%) and Mg(Mg#=55~66) and relatively low TiO2(0.2%~0.71%) content, similar to high-Mg diorite distributed extensively in western Shandong Province. There is a strong enrichment of LREE [(La/Yb)n=10~15] and HFSE(Nb,Ta,Ti) anomaly, with no Eu anomaly, and Sr(241×10-6~711×10-6) and Ba(554×10-6~822×10-6) content is high. The Sr-Nd isotope characteristics of rock resembling suggest that they have the same magma source. The ISr and εNd(t)values are respectively 0.706 473~0.708 867 and -15.13~-9.18, which are not consistent with the data of contemporaneous Yinan gabbro which had been studied by the former researchers.ml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
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