PT Danmar Explorindo Managing Director Dan Madre originally presented this paper at the 17th MGEI Annual Convention on the 25th of November 2025 in Surabaya, Indonesia. This event was hosted by MGEI, or Masyarakat Geologi Ekonomi Indonesia, with the theme of Sustainable Resilience of Indonesia’s Mineral Resources: The Role of MGEI and Its Contribution in Technology, Research, and Professionalism.
The Coal Geology of Sumatra and Future Prospects in a Changing World