Petrogenesis and Tectonic Implications of Triassic Plutonismin Southern California

通过U-Pb锆石年代学、微量元素分析和Nd、Sr、Pb同位素分析，研究了南加利福尼亚大陆边缘弧三叠纪岩体的成因。这些分析将有助于确定上地壳同化作用和分馏作用在岩体演化阶段中的相对作用。到目前为止，三叠纪岩体的研究很少，这些数据将为岩浆弧的早期演化提供急需的信息。研究结果将对加利福尼亚南部的构造演化和该地区元古代岩石圈的组成具有重要意义。

The genesis of Triassic plutons along the continental margin arc of southern California will be studied by U-Pb zircon geochronology, trace element analysis, and by Nd, Sr, and Pb isotope analyses. These analyses will allow the relative roles of upper crustal assimilation and fractionation to be ascertained for the stages of pluton evolution. Triassic plutons have been little studied until now and the data will provide much needed information on the early evolution of the magmatic arc. The results of this study will have important implications for the tectonic evolution of southern California and for the composition of the Proterozoic lithosphere in the region.