Magma generation in arc systems is the most complex phenomenon and history compared to that in other tectonic settings. The magma source/or sources and process/or processes caused the wide geochemical variation of the rocks produced are widely discussed, but still no agreement among the petrologists and geochemists. Indonesia…
Oil & Gas and• coal resources in Indonesia have been known smce the pre• independent era, and up to present-day, they are still mined and considered to be an important fossil energy commodity for several decade in the future. In contrast, oil shale deposits in Indonesia have not been touched for the benefit of f…