Rofiqul Umam

Isotopic evidence for slab-derived magmatic water beneath the Kussharo Caldera, Japan

It is well known that water transported by a subducting oceanic plate (slab) plays a key role in the formation of island-arc magmas. However, direct evidence demonstrating that magmatic water is derived from the slab remains limited. To address this, we conducted isotope and diss...

Stable isotope depletion and lithium enrichment due to accumulation processes in a structural controlled geothermal field : Evidence of meteoric water heated at shallow reservoir depths in the Sipoholon geothermal area, North Sumatra, Indonesia

The Sipoholon geothermal area in North Sumatra, Indonesia, is located within a tectonically active pull-apart basin in the central segment of the Sumatra Fault System, providing an excellent setting to investigate isotopic depletion and lithium (Li) enrichment in a structurally c...