The Jurassic high Sr/low Y granitoids in eastern China are characterized by high Sr/Y (27-166) and La/Yb (14-66) ratios, low abundance in Y (6-21μg/g) and Yb (0.5-2.0μg/g), comparable with those of adakites defined by Defant et al. Thus, they were recently considered as adakitic rocks by some researchers. Compared with the typical adakites in circum-Pacific margins, however, these high Sr/low Y granitoids have higher K2O (-3.5%) but lower A12O3 (-16.0%) as well as lower Mg#(-38) and δSrN (-1.23) values. Furthermore, they show relatively flat HREE patterns with Y/Yb values of -10 close to the chondritic value. These geochemical characteristics indicate a residue mineral assemblage of hornblende, garnet and plagioclase for these high Sr/low Y granitoids melt. Thus, they were generated by partial melting at 9-13 kbar (30-45 km in depth), similar to the Archaean high-Al TTG rather than the modern adakites. Generation of these high Sr/low Y granitoids cannot be considered as evidence for a thickened crust The Jurassic high Sr / low Y granitoids in eastern China are characterized by high Sr / Y (27-166) and La / Yb (14-66) ratios, low abundance in Y (6-21 μg / g) and Yb Compared with those of adakites defined by Defant et al. Thus, they were recently considered as adakitic rocks by some researchers. Compared with the typical adakites in circum-Pacific margins, however, these high Sr / low Y granitoids (-16.0%) as well as lower Mg # (- 38) and δSrN (-1.23) values. Moreover, they show relatively flat HREE patterns with Y / Yb values ​​of -10 close to the chondritic value. These geochemical characteristics indicate a residue mineral assemblage of hornblende, garnet and plagioclase for these high Sr / low Y granitoids melt. Thus, they were produced by partial melting at 9-13 kbar (30-45 km in depth ), similar to the Archaean high-Al TTG rather than the modern adakites. Generation of these high Sr / low Y granitoids can not be considered as evidence for a thickened crust