Geochemical of Volcanic Rock in Southern Part of Slamet Volcano, Indonesia

Abstract

Slamet volcano is the biggest volcano in Central Java, Indonesia which has stratovolcano type. Starting in 1772 until recent, Slamet volcano was erupted with short cycling so that geochemicals on rock are important to know how the history and erupted type. Method of research was conducted by geological survey (surface) and geochemical analysis of sample rocks. Geological condition is consist of lava flow, pyroclastic fall, and laharic deposits that was proven by petrography approached, meanwhile geochemical composition shows calc-alkaline and high K calc-alkaline series, genesis of magma was from continental plate with island arc tholeiitic setting. Depth of magma 155-174 km belom the earth's surface.