THOLEIITIC AND CALC-ALKALIC SERIES IN RELATION TO THE BEHAVIORS OF TITANIUM, VANADIUM, CHROMIUM, AND NICKEL.

Abstract

The tholeiitic (TH) and calc-alkalic (CA) series are the two major rock series in the non-alkalic (subalkalic) igneous rocks. In each series, the composition of rock (or magma) should vary with advancing fractional crystallization. Thus, the major and trace element compositions of igneous rocks could be understood in relation to the rock series and the stage of fractional crystallization. In this paper, the authors are dealing with the behaviors of vanadium, chromium, and nickel in the TH and CA series to show how their behaviors cast light on the nature of the series. Refs.