Accurate information about the value and characteristics of geothermal energy resources and reserves is needed in planning appropriate energy policies to optimize the utilization of geothermal resources in Indonesia. In addition, differences in the results of calculating geothermal energy resources and/or reserves by developers and the government cause the economic calculations...
Indonesia is one of the countries that has the largest geothermal potential in the world. One of them is located in Sukabumi Regency, West Java. In order to optimize geothermal potential, research on geothermal characteristics is needed, one of which is the study of alteration minerals in geothermal manifestations. This research is focused on alteration studies using coring and...
Coal is one of the largest commodities used to produce electrical energy in Indonesia. As considered that coal is non-renewable energy, it is important to find new potential sources of coal. Exploration was carried out in the Jangga area, Batang Hari Regency, Jambi Province. It was an early stage exploration activity carried out by Center for Mineral, Coal dan Geothermal...
The results of an investigation by PSDMBP in 2011 showed that the REE content in weathered granitoid at Parmonangan contained several elements with significant anomalies such as Ce (600 to 1400 ppm), La (400 to 1000 ppm), and Pr (600 to 1400 ppm). Therefore, further investigation needs to be carried out to determine the distribution of REE to the west of the previous...
Iha – Luhu area is located in the western part of Seram Island, which is about 59.2 km from city of Piru. Geographically, it is located at 128o0’35” to 128o2’42”East Longitude and 3o20’40” s.d 3o22’05”South Latitude and is included in Huamual sub-district, West Seram Regency, Maluku. Stratigraphy of Iha – Luhu is composed of metapelitic rock and low grade metamorphic lithologies...
Ketungau Hulu is a gold prospect plan area in Sintang-Silantek Block on the island of Kalimantan which is a collaboration program between Indonesia (Geological Agency) and Malaysia (Jabatan Mineral and Geoscience). Administratively, the research area is located in Sintang Regency, West Kalimantan with an area of 18 km2. This study aims to identify the geological conditions...
Mining activities in Bangka Island are being conducted since Dutch colonial era. The wastes of tin mining produced many abandoned tailings which could cause negative impact for environment. However, there are accessory minerals in tailings which could be the new potential source of critical mineral. The purpose of this study is to identify accessory minerals and content...
Fault structure plays an important role in a geothermal system. Faults can be weak zones that are the location of intrusions that are related with heat sources, the location of permeability for reservoar, and as the fluid flow path to the surface that appears as manifestation. By understanding the characterization and distribution of geological structures in geothermal fields...
Mineralization in the Bukit Randu area and its surroundings is formed by geological structures to be investigated.This study uses data on fault striation, quartz vein plane and quartz veinlet plane. This study aims to determine the main structural pattern forming the mineralization zone. This research is useful for determining the geological structure model in the Randu Hill area...
Nickel laterite is a product of weathering of ultramafic rocks that have an abundance of olivine and orthopyroxene minerals. Geology in the Gebe Island, Central Halmahera Regency, North Maluku Province is composed of limestone, which is equivalent to the Waigeo Formation which has an inconsistent relationship with the underlying ultramafic rocks as carriers of laterite nickel...
The Patuha geothermal field is located in West Java Province, Indonesia and developed by state owned company PT Geo Dipa Energi (Persero). The Commercial Operation Date (COD) for Patuha was in September 2014 with plant capacity of 1x60 MW. Until now, Patuha Unit I geothermal field has been running for almost 7 years. The current production wells have experienced a natural decline...
Iha – Luhu is located in the western part of Seram Island, Maluku which is placed at an elevation of 9 up to 341 meters above sea level and occupies Taunusa Metamorphic Complex. This study aims to study geological control, mineralization characteristics and ore geochemistry of cinnabar deposit in Iha - Luhu. Research method applies a literature review, fieldwork for sampling...
Optimization of mineral economic valuation aims to determine the maximum net present value of a project over the life of mine. The economic valuation optimization model in this study is the development of the Lane (1988) and Sasongko (2013) model by considering environmental costs and referring to the cash flow framework. The research methods are include the following: (1...
The characteristics of coal can be seen from the lithotype and cleats. This research studied about low rank coal from Dahor Formation to characterize lithotype, cleats, and luster of the coal. Coal lithotypes are associated with maceral in the form of thin bands. Cleats are fractures in coal. Luster is the bright appearance in coal. The coal samples for this research are obtained...
Weathering could stimulate the formation of several economic deposits such as bauxite, ferrite, nickel, manganese, and ion-adsorption type REE. Lingga Regency is situated near the equator with a tropical climate that is vulnerable to weathering. The area is constituted of several Paleozoic rock units and is located near the Bentong-Raub Suture that sustains intensive weathering...
The research was conducted by the background of gold mining community around the research area. The purpose of the study was to know the continuity and type of mineralization that had been previously found outside the study area. The methods used include geological mapping and geochemical sampling of river sediments, rocks and pan concentrates. Laboratory analysis carried out at...
The tropical climate of Indonesia causes rock weathering. Soil from weathered rocks can be analyzed to determine the anomalies element to define the mineralization prospect areas using the geochemical methods. This study was carried out in the Nanga Bangik area with geological conditions favorable for mineralization. A total of 135 soil samples were collected from horizon B along...
Nage Region is part of Sunda-Banda Arc volcanism which formed an en-echelon array in Flores Island. The complex regional tectonics setting of the study area has created intensively found geological structures in the study area. The study was made through identification of structural geology by topographic lineament analysis, river lineament, circular features, and fault fracture...
Combined analyses of Landsat satellite image and Digital Elevation Model Nasional (DEMNAS) are used to identify geothermal prospect areas. The analyses are applied in Aceh Tengah Regency because the information of springs exists in the regional geological map of Takengon. Two methods are applied to DEMNAS, namely the FFD method and circular features visual interpretation. Land...
In the Island of Sulawesi, there are many granitic rocks which have potential for containing radioactive mineral deposits. The purpose of this study is to determine the type of radioactive mineral deposits based on radioactivity, uranium grade, and mineralogy characteristics of certain granitic rocks. The data used comprise radioactivity measurement, uranium content, megascopic...
The Underground coal gasification (UCG) is one approach to make use of deep-seated coal by converting it to a more environmentally friendly gas. The South Sumatra Basin is one of Indonesia's productive coal basins. The objective of this study is to find a suitable coal deposit for the development of UCG. Characterizing the coal seams is used to evaluate the potential of...
The area of Mount Tampomas which is located in Buahdua District, Conggeang District, and Tanjungkerta District, Sumedang Regency, West Java was chosen as the research area because it is predicted to have geothermal potential with the presence of geothermal manifestations such as hot springs. The presence of manifestations relates to permeable zones controlled by geological...
Mount Rajabasa is one of the geothermal fields in Sumatra that has not been exploited until now. The existence of manifestations in this area is an indication of the potential existence of geothermal reservoirs. This study aims to identify high permeability zones based on Fault Fracture Density (FFD) analysis and to analyze the relationship between the characteristics of the...
Geothermal development in Indonesia still dominated in volcanic geothermal system which is used as indirect use utilization (electricity), whereas about 70% of 357 geothermal location in Indonesian associate with non-volcanic geothermal system. Lack of subsurface information such as well data and reservoir temperature as well as low economic value that cause geothermal...
The research aims to determine hydrothermal evolution of the mineralisation bearing fluid contained in the Ramba Joring Pit, including temperature, pressure, density and depth of mineralisation deposition formation. This research uses the fluid inclusion analysis. Inclusion sampling was carried out on two main textures of ore namely vuggy silica texture formed at range Th 331ºC...