Oleh: Kuntadi Nugrahanto

Abstraksi : ...

Oleh: Sujatmiko

Abstraksi : Opal Biru adalah sejenis opal berkualitas batumulia berwarna biru seperti warna safir biru. Opal biru ini ditemukan di daerah Sukabumi Selatan, Jawa Barat, sekitar awal Maret 1998. Dari hasil peninjauan awal ke lapangan terungkap bahwa temuan opal biru ini tergolong suatu temuan yang ...

Oleh: Asnawir Nasution;Muraoka;Takashima;Y.Okubo;H. Takahashi;M. Takahashi

Abstraksi : The study is a result of a new 5-year cooperation research program between NEDO, the Geological Survey of Japan and the Volcanological Survey of Indonesia. Preliminary interpretation of the exploration data from the Bejawa area of East Nusa Tenggara indicates the presence of a ...

Oleh: Yusuf S. Djajadihardja;Helmut Beiersdorf;Safri Burhanudin;Christian Reichert;Syarif Hidayat;Michael Wiedicke H.

Abstraksi : Joint cooperation on geological and geophysical investigation between the government of Indonesia (The Agency for the Assessment and Application of Technology, BPPT) and the government of Germany (Bundesanstalt fur Geowiessenschaften und Rohstoffe, BGR) has been carried out from 29 November ...

Oleh: Andry Nabasir;Andriyani S;Hendar SM;Haruji MP;Subagio

Abstraksi : The Telisa Formation is a thick shale interval with minor shaly sand reservoir in the Central Sumatra Area. This sand in Bangko field has not been widely developed because’ most of the existing producers are completed in the deeper formation, such as the planned Duri 1600’ sand for ...

Oleh: Bismantoro Prabowo;Gunardi B. Sulistyo

Abstraksi : An organic geochemical study was performed on 22 oils from various fields within the oil field blocks of Central Sumatra. The study was conducted in order to determine if the Trough, located between the Minas and Kotabatak Fields, is an active hydrocarbon kitchen. The oils from the study area ...

Oleh: Daja Djuang Putra’

Abstraksi : A challenging problem faced by all development geologists is how to increase the field production in anticipating natural production decline. For several years, PERTAMINA Jambi Operation has been faced to this problem until the discovery of Bungin Batu structure (BBT). This structure was ...

Oleh: Ory Sadjati;Asep H. P. Kesumajana;R. P. Koesoemadinata

Abstraksi : Nilai present day heatflow yang dianggap konstan sepanjang waktu geologi sering digunakan didalam melakukan pemodelan untuk ‘menentukan kematangan batuan induk. Anggapan ini sebenarmya kurang tepat karena pada kenyataannya featflow tidaklah bersifat konstan, namun fransient dan mengikuti ...

Oleh: R. Kunto Wibisono;Aminin Fanandi

Abstraksi : The Telisa formation in Minas field has been developed in the last 3 years, This formation has a low resistivity and low contrast between the shale and sand zones. Moreover, the Telisa is laminated, shally sand, and as such presents a challenge to open hole log analysis because of its ...

Oleh: Susanto Budi Nugroho;Untung Budi Santoso

Abstraksi : ...

Oleh: Tri Hananto;Bambang Wisnu Handono

Abstraksi : Horizontal well drilling is one of the technology currently used to exploit oil in reservoirs consisting low permeability zone, naturally fractured reservoirs, high cost-areas, and water coning zones (McCoy, 1996). Butun horizontal wells represent the usage of this technology to enhance oil ...

Oleh: A. Isjudarto;T. Darijanto;B. Sulistijo

Abstraksi : Mineralisasi daerah jalur Cikidang-Cirotan-Cikotok yang termasuk dalam zona Kubah Bayah merupakan mineralisasi tipe epitermal /ow sulphide berjalur utara selatan. Mineralisasi yang dijumpai sangat bervariasi mulai dari Low Base Metal (Cikidang) sampai High Base Metal ...

Oleh: B.P. Coutts;H. Susanto;N. Belluz;D. Flint;A. Edwards

Abstraksi : The Ertsberg East Skarn System. (EESS) is calciummagnesium silicate skarn containing in excess of 250 million tonnes of copper-gold grade. The Deep Ore fone (DOZ) is block cave mining operation exploiting a diluted reserve of 131 million tonnes grading 1.06% copper and 0.81 g/t gold in the ...

Oleh: Fernando R. Santos;Prianggito Sulistiono;Naomi E. W. Litaay

Abstraksi : The Totopo West epithermal vein system is situated at the NW margin of a Pliocene rhyodacitic caldera structure encompassing the Totopo Gold District in North Sulawesi, Indonesia. This favourable setting and the presence of sinters and high-level epithermal vein textures at Totopo West led to ...

Oleh: Harman Setyadi;Nur Wiwohol;Bowo Kusnanto;Sugeng Widodo;Nengah Sugita

Abstraksi : Kucing Liar replacement deposit was discovered in 1992. This is one of the latest gold discoveries in the Ertzberg Mining District, highland of Iman Jaya. Currently, a mining feasibility in this deposit is in progress. Kucing Liar is a complex, multistage Cu- Au Skarn/replacement deposit that ...

Oleh: Heru Sigit Purwanto

Abstraksi : Daerah Penjom terletak sekitar 7 kilometer (km) di sebelah selatan Kuala Lipis, Negeri Pahang, Semenanjung Malaysia, atau lebih kurang 20 km di sebelah timur sutur Bentong—Raub. Geologi daerah Penjom secara dominan tersusun oleh tuf, tuf lapili, dan batupasir, serta batulanau dan batulempung ...

Oleh: Muharam Sufjipto

Abstraksi : The Limpoga gold deposit is structurally controlled epithermal sediment hosted gold deposit located in the Ratatotok Distnct North Sulawesi. Limpoga is hosted in ai folded sequence of limestone, volcanogenic sediments and andesite and unconformably overlain by a post mineral sequence of ...

Oleh: Judihanri;Bambang Irawan

Abstraksi : Graseberg is located in Inan Jaya mountains (4,200 meters above sea-level) is one of the most richest Cu- Au deposits in the world. Magmatic activity in Grasberg was initiated by trachy-andesite volcanic activity, which resulted in volcanic rocks that comprised volcanic breccia, lava, and ...

Oleh: Partama Md;Sulistiyo B.

Abstraksi : Setting kekar di dalam sistem struktur sangat penting di dalam lingkungan mineralisasi, sehingga pola urat akan terkontrol oleh adanya struktur yang terjadi. Kegiatan magma yang mengintrusi secara regional akan membentuk gaya-gaya aktif secara regional pula, struktur primer yang terbentuk ...

Oleh: Geoffrey de Jong;Wahyu Sunyoto

Abstraksi : The portable infrared mineral analyser (PIMA) has effectively been used in the industry as an exploration tool. PIMA has mainly been used in defining alteration zones for porphyry and/or epithermal style deposits. Usage of PIMA in other type of deposits, eg skarns, has not yet been documented. ...

Oleh: M. Ulum A. Gani;Harijanto Soetjito

Abstraksi : Karakterisasi abu batubara Tondongkurah, Pangkajene, Sulawesi Selatan dilakukan untuk mengetahui kualitas pemanfaatannya yaitu dengan berbagai macam analisa seperti anlisa proksimat, petrografi, mineral, dan kimia. Hasil analisa petrografi pada batubara Tondongkurah (vitrinite reflectance ...

Oleh: Mohammad Syaiful

Abstraksi : An intensive surface geological mapping for coal exploration was done in Mampun Pandan Area (Jambi Province) in late 1989. This detail field mapping within an area of 8.25 x 6.2 square kilometers was conducted by using outcrop description, trenching, test pits, and completed by shallow ...

Oleh: Multan;Rauf A.;Rochmanto B;Langkoke R.

Abstraksi : Chromite placer deposit at Sawugi area is a part of the concentration of chromite deposit along the East Coast of Central Sulawesi that faces to Tolo Bay. Laterisation and denudation processes on the conglomerate of Tertiary Tomata Formation, released the chromite to the river stream, ...