Komang Anggayana,
Research Group of Earth Resource Exploration, Faculty of Mining and Petroleum Engineering, ITB Jln. Ganesha No. 10, Bandung,
Indonesia
Basuki Rahmad,
Study Programme of Geology, Faculty of Mineral Technologies, UPN “Veteran” Yogyakarta,
Indonesia
Agus Haris Widayat,
Research Group of Earth Resource Exploration, Faculty of Mining and Petroleum Engineering, ITB,
Indonesia