This technical report details the results of a comprehensive petrographic analysis conducted on rock samples collected from Obi Island in North Maluku. Performed by P.T. Gondwana for LITBANG EP-PERTAMINA, the study focuses on identifying the mineralogical composition, textures, and fabric of the volcanic and sedimentary rock units in the region. The analysis serves as a foundational geological …
Ore Deposit Studies and Exploration Models (Volume 1) is a comprehensive set of course notes produced by the Centre for Ore Deposit and Exploration Studies (CODES) at the University of Tasmania. This specific volume focuses on Volcanogenic Massive Sulphide (VMS) Deposits, providing an in-depth analysis of their geological settings, ore mineralogy, and hydrothermal alteration patterns. The text …
This technical report presents a comprehensive multi-disciplinary study of the Sorong Fault Zone in Eastern Indonesia, a region characterized by complex tectonics at the junction of the Eurasian, Philippine Sea, and Australian plates. The project establishes a regional geochronological and stratigraphic framework for the islands of Halmahera, Morotai, Bacan, Obi, and Waigeo. Utilizing geologica…
Laporan ini merupakan dokumen penelitian awal yang diterbitkan oleh Pusat Survei Geologi untuk mengkaji sejarah pembentukan dan perkembangan cekungan sedimen Ketungau di wilayah Kalimantan Barat. Fokus utama penelitian ini adalah memahami mekanisme tektonik yang menyebabkan penurunan cekungan (basin subsidence) serta pola sedimentasi yang terjadi selama periode Tersier. Studi ini mengintegrasik…
Bacan is located in the zone of convergence between the Australian, Philippine Sea and Eurasian Plates. This study establishes a new stratigraphy for the region based on geological mapping, biostratigraphic dating, and geochemical analysis. The investigation reveals that the oldest rocks belong to the Sibela Continental Suite, likely of Palaeozoic age, derived from the Australian craton. The re…
Kalimantan Geoscientific Data Package: Scientific Papers is a seminal collection of technical studies resulting from the Indonesia-Australia Geological Mapping Project (IAGMP). This volume compiles essential research on the geological framework of Kalimantan, featuring detailed geochemical analyses, isotopic dating of igneous suites, and regional stratigraphic syntheses. The papers provide crit…
Petrological Processes examines the fundamental physical and chemical mechanisms that govern the formation, evolution, and transformation of rocks within the Earth’s crust and mantle. The subject covers key processes such as partial melting, magma generation, fractional crystallization, magma mixing, metasomatism, and metamorphic reactions, as well as the role of pressure, temperature, fluids…
Tectonics and Sedimentation of Indonesia is a significant collection of scientific papers published to honor the 50th anniversary of R.W. van Bemmelen’s seminal work, The Geology of Indonesia. This volume, edited by H. Darman and F.H. Sidi, provides a comprehensive look at the interplay between tectonic evolution and sedimentary processes across the Indonesian archipelago. The contributing au…
Collection of Granite Papers is a compiled volume that brings together a series of scientific studies addressing the origin, classification, petrology, geochemistry, and tectonic significance of granitic rocks from various geological settings. The papers discuss granite genesis through processes such as partial melting, magma differentiation, crust–mantle interaction, and tectono-magmatic evo…
Majalah Geologi Indonesia merupakan jurnal ilmiah yang mempublikasikan hasil penelitian, kajian, dan pemikiran ilmiah di bidang ilmu kebumian, khususnya geologi Indonesia. Artikel-artikel yang dimuat mencakup topik stratigrafi, sedimentologi, petrologi, geokimia, geologi struktur, tektonik, geologi ekonomi, serta aspek kebencanaan dan sumber daya geologi. Jurnal ini menjadi media penting bagi p…