The study, resulting from a collaboration between the laboratory of Professor of Geology Claire Bucholz and UC Berkeley, has shown that the strontium isotopic compositions of island arc magmas ...

The mélange rises as diapirs into the overlying hot mantle wedge due to its buoyancy and low viscosity, which then melts along with the surrounding mantle rocks and eventually forms the arc magmas.

Arc volcanism are widely observed in oceanic ... with the trace elemental and Sr-Nd isotopic characteristics of SSI magmas but also accounts for their systematically heavy Mg-B isotopic compositio ...

A chord separates the circumference of a circle into two sections - the major arc and the minor arc. It also separates the area into two segments - the major segment and the minor segment.