摘要
A detailed study of isotope and trace element on the volcanic-intrusive complex in Yanbei, Jiangxi Province is reported.All rocks of the complex have similar crystallization age,relatively high(^(87)Sr/ ^(88)Sr)_i and δ^(18)O,high ^(207)Pb/^(204)Pb,lower ε_(Nd)and old Nd model age.They also possess high Rb/Sr and F/ Cl,weak Ce and intense Eu negative anomalies.These characteristics clearly demonstrate that the volcanic- intrusive complex is the product of the evolution of cognate magma,and the initial magma was formed by the partial melting of Early-Middle Proterozoic metasedimentary rocks.
A detailed study of isotope and trace element on the volcanic-intrusive complex in Yanbei,Jiangxi Province is reported.All rocks of the complex have similar crystallization age,relatively high(<sup>87</sup>Sr/<sup>88</sup>Sr)<sub>i</sub> and δ<sup>18</sup>O,high <sup>207</sup>Pb/<sup>204</sup>Pb,lower ε<sub>Nd</sub>and old Nd model age.They also possess high Rb/Sr and F/Cl,weak Ce and intense Eu negative anomalies.These characteristics clearly demonstrate that the volcanic-intrusive complex is the product of the evolution of cognate magma,and the initial magma was formed by thepartial melting of Early-Middle Proterozoic metasedimentary rocks.
