Production of lithium-ion batteries in Indonesia will be more feasible if Indonesia has its own lithium resources. Metapelitic rocks have the potential to serve as an alternate raw material for lithium. Phyllite, a type of metapelitic rock, was found in the Luk Ulo Complex, Central Java. The objective of this study is to determine the mineral composition and lithium concentration...
The geology of West Kalimantan, especially Sanggau Regency, contains a wide range of acidic to intermediate rocks of Lower Cretaceous age with stable tectonic conditions that meet the requirements for the formation of bauxite on an economical scale. The research area is in Mukti Jaya Village, Sanggau Regency, West Kalimantan Province. This research aims to determine the geology...
Government drilling is a geothermal exploration well drilling program carried out by the government. For planning, it is necessary to rank candidate prospect areas to be included in the program. This study ranked twenty candidate drilling sites using the incremental internal rate of return or incremental IRR method from discounted cash flow (DCF) calculations. The stages for the...
The estimation of mineral resources is crucial in mining, particularly in determining production targets, pit design, and investment decisions. Accurate resource estimation results will facilitate optimal mine planning. The objective of this study is the application of estimation techniques that consider geostatistics, namely ordinary kriging, in estimating bauxite deposit...
Multielement geochemical data processing with K-means and principal component analysis was carried out in the Toguraci, part of the Gosowong gold mine contract of work in North Halmahera Regency, North Maluku Province. Previous research has suggested that there is overprinting low sulphidation epithermal Au-Ag mineralization and Cu-Au porphyry. This research focused on 2 selected...
Cement factory PT. Cemindo Gemilang which is located in Lebak city, has done many exploration activities which in this area also has the potential for limestone resources. Basically, the research area has a quite large potential for limestone and never been mined before. Therefore this research can help to determine the geological condition in the research area including...
The study area is located in Blok X, PT SILO, Sebuku Island, South Kalimantan. The geology of the study area is dominated by serpentinized ultramafic rocks, which have a high potential for the formation of lateritic iron minerals. The aim of the investigation of the area was to determine the vertical and horizontal distribution of the element contents and the association of the...
Several previous investigative activities in the Dolok Pangkuruhan area, Dairi Regency, North Sumatra Province have discovered several locations of gold and base metal mineralization. This article discusses the characteristics of alteration and mineralization of gold and base metals based on the results of investigations in 2023 with the aim of determining the characteristics of...
The occurences of iron mineralisation in upper part of Kusan River, Kapayang, Regency of Tanah Bumbu are still indicative and required more research to reveal the characteristic and potency of iron ore deposits. The research was conducted with reconnaissance survey using methode of geological mapping, sampling of rock, iron ore, lateritic soil, and panning concentrate of crushed...
The North Arm of Sulawesi Island is a gold-rich metallogenic belt. The study area is located in Bakan Village, Bolaang Mongondow Regency, North Sulawesi in the IUP area of PT J Resources Bolaang Mongondow. Exploration to obtain new prospect areas is still being carried out. Therefore, research on alteration and mineralisation characteristics is expected to be a reference for the...
This research was conducted to identify the characteristics of laterite deposits in the western and eastern blocks of Sebuku Island, Kotabaru Regency, South Kalimantan using field observation methods, and laboratory analysis including titration, XRF, XRD and petrography analysis. The characteristics of the western block laterite deposits are 10 meters until 15 meters deep. The...
The use of Geographic Information System (GIS) modelling in developing geothermal resources has been widely carried out, from the initial survey and exploration to exploitation or production stages. This GIS modelling aims to delineate specific locations that are considered to have geothermal resources or are suitable for geothermal field production facilities. This study aims to...
The tropical climate in Indonesia causes a high level of chemical weathering or lateritization of ultramafic rocks which results in the enrichment of economic elements such as Fe, Ni and Co. These elements accumulate in the limonite and saprolite zones. This research was conducted on Sebuku Island which composed of ultramafic rocks, especially harzburgite. This study aims to...
Iron is a metal commodity that is widely used in human civilization, and is now used as a raw material for making steel and a mixture of raw materials for cement. Therefore, research activities on iron sand deposits are still needed, especially in ex-mining areas that are interesting for re-examination, because increase of metal price, so decrease the cut off grade for iron sand...
The subsurface structure of the geothermal field in Desa Tambang Sawah has been mapped. This research aims to delineate the resistivity values in the area of Tambang Sawah Village, Lebong Regency, Bengkulu Province based on magnetotelluric measurements which can later identify low, medium, and high resistivity values to interpret geothermal in the research area. The...
The identification of deposits and mineralogical characteristics of ores is necessary to assist further exploration development activities. Research in the Pit X test trench area was conducted to determine the type of epithermal deposits based on the deposite form, ore mineral texture, alteration, sulfide minerals, and gangue minerals that are dominantly found from the results of...
The development of high technology currently relies heavily on rare earth elements (REE), some of which are obtained from tin ore mining. The largest production of tin ore is located in the Bangka Belitung Islands. To assess this potential further, this research aims to provide direction for development. The focus of this research centers on Monazite, which has the potential to...
The three main problems in Indonesia's geothermal development include selling price issues, working area tenders, and high upstream risks. These three will lead to one condition: geothermal projects cannot reach their economic level. The Government of Indonesia (GoI) has initiated the Government Drilling Program to reduce high upstream risks. In addition to the main objective of...
A requirement in the ISO 17025-2017 quality control systems is the adaptation of standard reference materials to ensure measurement accuracy and validation. However, standard reference material is expensive with difficult procurement procedures and limited matrices. Therefore, it is necessary for laboratories to produce their own standard reference materials. This study aims to...
Thorium is radioactive element which can be used as the main element of nuclear fuel beside of uranium. Belitung island is located at The Southeast Asian Tin Belt where it has much radioactive mineral potential. The purpose of this study is to conduct radioactivity measurement and inferred resource estimation of thorium (Th) in study area. The lithology of study area consists of...
The research area is located in the southern part of Seram Island, Maluku, which is at an elevation of 3 to 675 meters above sea level; is composed of metapelites to low-grade metamorphic rocks, coralline limestone and alluvial deposits. The purpose of this investigation is to study geological control, mineralization characteristics and ore geochemistry of Au±basemetal deposit in...
High anomaly analysis of Land Surface Temperature (LST) on Landsat 8 imagery is a remote sensing method to detect the presence of geothermal prospects. This analysis is carried out through the presence of ground surface temperature anomalies. This study aims to identify the indication of Mount Sirung geothermal prospect in Alor Regency, East Nusa Tenggara Province through high...
The Gimpu geothermal area is one of the geothermal areas in Central Sulawesi. Surface geothermal manifestations are characterized by the emergence of hot springs with a temperature of 53–67 oC.Geophysics research in this area was conducted to determine the subsurface structure that describes the geothermal system in the Gimpu area. This paper discusses the characteristics of...
The X Geothermal Field in Flores, East Nusa Tenggara, has surface thermal manifestations such as hot springs, fumaroles, and alteration rocks, which indicate potential geothermal resources. This research aims to model and characterize the base of the conductor in X geothermal field as a supporting data for geothermal exploration studies. The modeling was performed using 3D...
Bentonite is an abundant mineral resource in Indonesia, based on data from the Center for Coal and Geothermal Mineral Resources (PSDMBP) in 2021 the measured resource of bentonite is 3,299,072,992.75 tons and has not been utilized optimally. Sekarwangi Village has bentonite resources, based on that the purpose of this research was conducted to find out the potential and types of...