Petrogenesis and Tectonic Implications of Triassic Plutonismin Southern California

利用锆石U-Pb值年代学、微量元素分析和Ndsr、Pb3种同位素分析方法，对南加州大陆边缘弧三叠纪深成岩体的成因进行了研究。这些分析将使上地壳同化和分馏在深成岩体演化阶段中的相对作用得以确定。到目前为止，人们对三叠纪深成岩浆岩的研究很少，这些数据将为岩浆弧的早期演化提供急需的信息。这项研究的结果将对南加州的构造演化和该地区元古代岩石圈的组成具有重要的意义。

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.