Fig. 1: Study area and magma storage in Java and Bali.
From: Sunda arc mantle source δ18O value revealed by intracrystal isotope analysis
a Map of Central to East Java and Bali showing the location of Merapi, Kelut, Batur, and Agung volcanoes. The modern Sunda arc volcanoes in Central to East Java (dark grey) are mainly built on the Kendeng Basin (brown), but overlap locally with the Miocene Southern Mountains arc. Inset shows the regional tectonic setting with the study area in a red box. Maps in a were produced using GeoMapApp (www.geomapapp.org)74 with geological information from ref. 59. b Summary of thermobarometric models constructed using clinopyroxene mineral data from the samples utilised in this study. Black curves represent the frequency of crystallisation depths calculated from clinopyroxene mineral data (data from refs. 12,13,14). Note that clinopyroxene from the Merapi and Kelut samples crystallised dominantly in the arc crust (including the Kendeng Basin), whereas clinopyroxene from the Balinese samples crystallised at the crust–mantle boundary and within the upper mantle. Abbreviations: Freq., frequency; Moho, Mohorovičić discontinuity.
