Profile of rare earth element characteristics across the Peninsular Ranges Batholith near the international border, southern California, U.S.A., and Baja California, Mexico

This brief report summarizes REE abundances and fractionations in a number of rocks in a profile across the Peninsular Ranges batholith, in the region east of San Diego, California, and Tijuana, B.C., Mexico. The data are from part of a more extensive investigation of the REE geochemistry in the northern 600 km of the batholith. (Gromet and Silver, 1977; Gromet, 1979; Gromet and Silver, 1979, and in preparation). Other contributions in this guidebook report systematic variations in the geochemistry, petrology and history of the batholith, as revealed in transverse traverses. Consequently, emphasis is placed on examining the extent to which the well-defined REE geochemical characteristics can be related to other major characteristics of the batholithic complex.