Geologi, Karakteristik Alterasi Hidrotermal dan Mineralisasi Bijih pada Pit Purnama Martabe, Kabupaten Tapanuli Selatan, Provinsi Sumatera Utara: Geology, Hydrothermal Alteration Characteristics and Ore Mineralization in Purnama Martabe Pit, Tapanuli Selatan District, North Sumatra Province. PROMINE [Internet]. 2021 Sep. 22 [cited 2026 Apr. 15];9(1):37-44. Available from: https://www.journal.ubb.ac.id/index.php/promine/article/view/2118