Abstract

Major elemental analyses and specific gravity determinations were made on bulked rock samples from 162 localities over the Lakeview Mountains pluton. Mineral separates from 126 localities were also analyzed. Results show that the pluton is highly homogeneous on the large scale with high heterogeneity on the small scale. Despite the high homogeneity, all analytical results define consistent zonational patterns approximately parallel to the walls of the body and to the concordant schlieren. This zonation shows that the Lakeview Mountains pluton has a relatively basic and dense core compared to its margin and implies that the last rock to crystallize was more basic than rock formed earlier.

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