scholarly journals Identification of Geothermal Potential Based on Fault Fracture Density (FFD), Geological Mapping and Geochemical Analysis, Case Study : Bantarkawung, Brebes, Central Java

KnE Energy ◽  
2015 ◽  
Vol 2 (2) ◽  
pp. 141
Author(s):  
Oktoberiman . ◽  
Dimas Aji Ramadhan P ◽  
Fajar Rizki W ◽  
Rizal Tawakal A
Keyword(s):  
Alternative Energy ◽  
Hot Springs ◽  
Major Ions ◽  
Research Area ◽  
Geological Mapping ◽  
Hot Water ◽  
Geothermal System ◽  
Geochemical Analysis ◽  
Fracture Density ◽  
Geothermal Potential

<p>Insufficient of conventional energy production today in Indonesia, encouraging all elements to discover an alternative energy. Geothermal is one of big potential alternative energy in Indonesia regarding the conditon of geological setting in Indonesia which has 129 active volcanoes. Bantarkawung is located in the western of Mount Slamet where hot spring occured as geothermal manifestation. This indicate geothermal potential in that area. This research is aimed to identify geothermal potential that lies in bantarkawung using Fault Fracture Density (FFD), Geological Mapping and Geochemical analysis. Based on FFD analysis known that anomaly area is located at central and northeast of research area, and based on geological mapping known that area composed by mudstone unit and sandstone unit, water temperature of research area is 43 °C to 62 °C, by using geochemical analysis of major ions HCO3-,Cl-,S042- known that the type of hot water is bicarbonate water which characterized as an outflow zone of geothermal system. </p><p><strong>Keywords</strong>: Bantarkawung; FFD; geochemichal analysis; geothermal; hot springs</p>

scholarly journals Magmatism and Geothermal Potential in Pandan Volcano East Java Indonesia

2019 ◽  
Vol 2 (2) ◽  
pp. 50
Author(s):  
Isao Takashima ◽  
Dwi Fitri Yudiantoro
Keyword(s):  
Igneous Rock ◽  
Hot Springs ◽  
Hot Water ◽  
Geothermal System ◽  
Geothermal Fluid ◽  
Additional Information ◽  
Geothermal Potential ◽  
High K ◽  
Petrographic Method ◽  
Using Data

Pandan volcano is a volcano formed on Tertiary sedimentary rocks from the Kendeng zone deposited in the basin of East Java. In addition to generating petroleum potentials, such as Cepu and Bojonegoro oil fields, this area also generates geothermal potential. As a source of heat from the geothermal system is igneous rock formed from the magmatism process. The type of rock formed by the process of magmatism in the Pandan geothermal system is basaltic-andesitic and hornblende andesite are medium-high K calk alkaline affinity located in the island arc. The interaction of hot rock from post magmatism process with hydrothermal fluid resulted in the manifestation of hot springs and calcite travertine in the study area. Prediction of the subsurface temperature of hot water from geothermometer silica analysis contained in Banyukuning and Jarikasinan show cristobalite Beta equilibrium (70oC) and quartz temperature (120oC). To study about magmatism and geothermal fluid using petrographic method and petrochemical analysis (X-ray fluorescence spectrometry method) to the sample of igneous rock. While to study the fluid type and geothermometer of geothermal fluid using data from previous researchers. This research study is expected to provide additional information on the field of geothermal and magmatism in this area.

scholarly journals An Integrated Survey of the Geochemical Study at the Blawan-Ijen Area, East Java

2021 ◽  
Vol 10 (2) ◽  
pp. 84-93
Author(s):  
Riska Laksmita Sari ◽  
Firman Sabila ◽  
Haeruddin Haeruddin ◽  
Eriska Saputri ◽  
Welayaturromadhona Welayaturromadhona ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Alternative Energy ◽  
Hot Water ◽  
Geothermal System ◽  
Water Type ◽  
Geochemical Analysis ◽  
Near Surface ◽  
Co2 Gas ◽  
Geothermal Fluid ◽  
Sulphate Water

Geothermal energy is a renewable alternative energy source. One of the analyses used to determine the characteristics of a geothermal field is water geochemical analysis. The target of this research is the Blawan-Ijen geothermal prospect area, Bondowoso. The geochemical analysis was carried out using AAS, Spectrophotometer and acid-base titration. This survey shows the characteristics of the geothermal system and geothermal fluid in the Blawan area, Ijen. From the chemical analysis of hot water, we found that the types of geothermal water fluids in the Blawan Ijen area vary. In samples BL1, BL2 and BL5 included in the type of Sulphate Water with the dominant elemental Sulphate (SO4) content is also known as Sulfuric Acid Water (Acid-Sulphate Water). Then for the BL4 sample included in the type of chloride water. This type of water is a type of geothermal fluid found in most areas with high-temperature systems. Areas with large-scale hot springs flowing with high Cl concentrations originate from deep reservoirs and indicate permeable zones in those areas. However, this area may not be located above the main upflow zone. There are several other possibilities, such as topographic influences, which can significantly impact hydrological control. The presence of chlorine gas can also identify high zones' permeable areas (e.g., faults, breccia eruptions or conduit). In contrast, BL3 samples are included in the Bicarbonate Water-type. The element HCO3 (bicarbonate) is the most dominant element (main anion) and contains CO2 gas from the chemical analysis results. HCO3 water is generally formed in marginal and near-surface areas in systems dominated by volcanic rocks, where CO2 gas and condensed water vapour into groundwater. The vapour condensation can either heat the groundwater or be heated by steam (steam heated) to form an HCO3 solution

scholarly journals Natural State Modeling of Singapore Geothermal Reservoir

2012 ◽  
Vol 3 ◽  
pp. 34-40
Author(s):  
Hendrik Tjiawi ◽  
Andrew C. Palmer ◽  
Grahame J. H. Oliver
Keyword(s):  
Hot Springs ◽  
Hot Spring ◽  
High Heat ◽  
Hot Water ◽  
Geothermal Reservoir ◽  
Natural State ◽  
Geothermal System ◽  
Fuel Price ◽  
The Cost ◽  
Engineered Geothermal System

 The existence of hot springs coupled with the apparent anomalous high heat flow has sparked interest in the potential for geothermal development in Singapore. This geothermal resource may be potentially significant and could be exploited through Engineered Geothermal System (EGS) technology, i.e. a method to create artificial permeability at depth in granitic or sandstone formations as found under Singapore. The apparently ever-increasing fossil fuel price has made the cost of using the EGS technology more viable than it was in the past. Thus, to assess the resource, a numerical model for the geothermal reservoir has been constructed. Mass and heat flows in the system are simulated in 2D with AUTOUGH2.2, and the graphical interface processed through MULGRAPH2.2. Natural state calibration was performed to match both the observed and the expected groundwater profile, and also to match the hot water upflow at the Sembawang hot spring, with simulated flowrate matching the hot spring natural flowrate. The simulation gives an encouraging result of 125 - 150 °C hot water at depth 1.25 – 2.75 km.

scholarly journals INTERPRETASI SISTEM PANAS BUMI SUWAWA BERDASARKAN DATA GAYA BERAT

2020 ◽  
Vol 5 (2) ◽  
pp. 44-54
Author(s):  
Dian Nur Rizkiani ◽  
Rustadi Rustadi
Keyword(s):  
Hot Springs ◽  
Bouguer Anomaly ◽  
Ground Surface ◽  
Research Area ◽  
Geothermal System ◽  
Svd Analysis ◽  
Free Air ◽  
Tentative Model ◽  
System Data ◽  
Andesite Lava

The research of gravity on Suwawa Sub-District geothermal is done for the purposes to determine fault structure using Second Vertical Derivative (SVD) technique, create a 2D subsurface model and 3D tentative model using regional anomaly data, and interpreting Suwawa geothermal system. Data processing is done in the research include: drift correction, terrain correction, free air correction, complete Bouguer anomaly, spectral analysis, SVD analysis, 2D modeling and 3D inversion modeling and tentative model. The research results showed that the research area has low Bouguer anomaly with a range of 75.8 to 79.5 mGal values in the West and Southeast, while high anomaly with a range of 90.9 to 111.2 mGal values in the Northern and Southern, there is correlation of fault based on SVD analysis with geological fault that indicate the presence of Libungo hot springs, the inversion results indicate the presence of low density (ρ = 1.8 g/cc) which is an alluvial rocks and high density (ρ = 2.9 g/cc) which is Andesite Lava rocks, 3D tentative modeling indicate the presence of reservoir is at a depth of 2 km from the ground surface. Based on the model created, Cap Rock is located on Andesite Lava rocks with ρ = 2.9 g/cc at a depth of 1200 m and Heat Source located at a depth of 2000 m.

scholarly journals Hydrogeochemistry of Natar and Cisarua Hot springs in South Lampung, Indonesia

2019 ◽  
Vol 4 (3) ◽  
pp. 178
Author(s):  
Mochamad Iqbal ◽  
Bella Restu Juliarka ◽  
Wijayanti Ashuri ◽  
Bilal Al Farishi
Keyword(s):  
Metamorphic Rock ◽  
Meteoric Water ◽  
Hot Springs ◽  
Hot Spring ◽  
Isotope Analysis ◽  
Research Area ◽  
Geothermal System ◽  
13C Isotope ◽  
Geologic Map ◽  
Quaternary Volcanic Rock

Natar Hot Spring is one of the geothermal manifestations that is located in Lampung Province, Indonesia. About 6 km to the east, another hot spring appears with temperature around 40°C with neutral pH called Cisarua Hot Spring. The Natar Hot Spring itself having temperature 47-54°C with 6.23 pH. Based on the geologic map, the appearance of these hot spring is caused by Lampung-Panjang Fault which trending northwest-southeast. Morphology of the research area is showing a flat terrain topography which composed of Quaternary volcanic rock and metamorphic rock in the basement. The nearest volcano that expected to be the heat source of the geothermal system is the Quaternary extinct volcano called Mt. Betung which is located about 15 km to the southwest. The aim of the study is to analyze the geochemistry of the manifestations and calculate the reservoir temperature. Geochemistry analysis result shows both manifestations are bicarbonate which is formed as a steam-heated water or steam condensates. Geothermometer calculation shows that the geothermal reservoir has temperature 150-160°C with approximately 300 m in depth. All manifestations are originated from meteoric water according to stable isotope analysis D and δ18O data and interacting with carbonate-metamorphic rock beneath the surface based on 13C isotope value. A further geophysics study is needed to determine where the heat comes from.

scholarly journals Geological Aspect to Enhance Cultural Heritage at Ngempon Temple Geotourism Site, Semarang Regency, Central Java

2021 ◽  
Vol 317 ◽  
pp. 01031
Author(s):  
Mohamad Fajril Falah ◽  
Jenian Marin ◽  
Tri Winarno
Keyword(s):  
Data Collection ◽  
Field Data ◽  
Hot Springs ◽  
Research Area ◽  
Geological Mapping ◽  
Petrographic Analysis ◽  
Central Java ◽  
Field Data Collection ◽  
Lower Pleistocene ◽  
Historical Sites

Ngempon Temple is one of the historical sites around the Mount Ungaran area. Ngempon Temple is the result of Hindu civilization in Indonesia which was built in the VIII-IX century. This research was conducted in the Ngempon area because it is necessary to conserve historical sites associated with geological sites in the study area. This study aims to determine the geological aspects that have the potential to become geotourism sites in the research area. The methods used are geological mapping for field data collection and petrographic analysis to determine rock characteristics. There are several sites including historical sites and geological sites in the vicinity of Ngempon Temple, namely Ngempon Temple, Diwak Waterfall, and Derekan Hot Springs. The lithologies found in the research area are claystone, tuff sandstone, basaltic andesite breccia, and andesite breccia. The volcanic rock in the research area is formed by Mount Ungaran activity during Lower Pleistocene until Holocene.

Laboratory Experiences in Alternative Energy Systems and Their Integration in a Green Curriculum

2010 ◽  
Author(s):  
Said Dini ◽  
Richard B. Mindek ◽  
Daniel Goodwin ◽  
Adam Desmarais
Keyword(s):  
Wind Energy ◽  
Solar Collector ◽  
Alternative Energy ◽  
Mechanical Engineering ◽  
Energy Systems ◽  
Hot Water ◽  
Geothermal System ◽  
Solar Pv ◽  
Laboratory Facility ◽  
Laboratory Experiences

Alternative energy laboratory experiences in solar PV and wind energy have been developed to help support the “green” concentration recently offered for the first time in the mechanical engineering program at Western New England College. These laboratories, which give students hands-on experience and a better understanding of basic concepts in alternative energy systems, are conducted in a newly developed indoor/outdoor alternative energy laboratory facility. The alternative energy indoor/outdoor laboratory facility includes a fully operation geothermal system, which is used to heat and cool the engineering labs. It also includes six 195 Watt photovoltaic panels, a 30,000 Btu/clear day flat-plate solar collector, a Thermomax evacuated tubes solar collector, as well as a full scale 1 kW wind turbine, which allows for useful power and hot water to be provided to the engineering building. This facility is also fully instrumented for the collection of key performance data and allows for large scale demonstration of alternative energy systems to students. This paper describes the development, operation and capability of the indoor/outdoor alternative energy facilities, as well as a detailed description of solar and wind experiments, and how these are used in support of the “green” concentration within the mechanical engineering curriculum to give engineering graduates greater competency in the design, analysis and application of solar and wind energy systems.

scholarly journals Study of Geothermal Maronge, Sumbawa West Nusa Tenggara

2017 ◽  
Author(s):  
Romi Aprianto
Keyword(s):  
Hot Springs ◽  
Chemical Properties ◽  
Geothermal Gradient ◽  
Temperature Limit ◽  
Research Area ◽  
Hot Water ◽  
Geochemical Data ◽  
Water Type ◽  
High Enthalpy ◽  
Chloride Water

This study aims to determine the physical characteristics, analyze chemical properties, determine the type, estimate subsurface temperature, estimate geothermal gradient, and examine the use of hot springs in Maronge, Sumbawa, West Nusa Tenggara. Study was undertaken by collecting geological and geochemical data, followed by laboratory analysis. Study area for geothermal characteristization consists of four hot springs. The percentage of ions HCO3-, Cl- and SO42- in hot water samples analyzed showed that the hot springs area of research is the chloride water type. Subsurface temperatures estimated using geothermometer Na - K in the research area on the hot springs 1 to 4 are 210,68oC, 248,45oC, 243,28ºC and 258,91oC, and included in the high enthalpy which has a temperature limit &gt; 225oC. Geothermometer Na - K – Mg showed that the hot springs in the study area are in partial equlibrium. It is further revealed that geothermal energy in the areas of research can be used as a power plant.

scholarly journals The Origin of Geothermal Water Around Slamet Volcano - Paguyangan - Cipari, Central Java, Indonesia

2020 ◽  
Vol 5 (4) ◽  
pp. 206-210
Author(s):  
Sachrul Iswahyudi ◽  
Indra Permanajati ◽  
Rachmad Setijadi ◽  
Januar Aziz Zaenurrohman ◽  
Muhamad Afirudin Pamungkas
Keyword(s):  
Hydrothermal System ◽  
Meteoric Water ◽  
Hot Springs ◽  
Hot Spring ◽  
Geological Structure ◽  
Spring Water ◽  
Hot Water ◽  
Geothermal Water ◽  
Geochemical Analysis ◽  
Central Java

The existences of several hot springs between Slamet volcano, Paguyangan, and Cipari Districts raised questions regarding their origin. Several studies have been conducted related to the hydrothermal system at the location. Subsequent studies are needed to understand the hydrothermal system at the research site for the sustainability and conservation of geothermal natural resources. This research has reviewed several previous studies plus the latest information on the origin of hot spring water with the help of deuterium (2H) and 18O isotopes. This study used geochemical analysis of hot springs (geothermal) and local meteoric water to obtain information on isotope values. This was used for the interpretation of the origin of geothermal water. This study also used regional geological analysis methods for the interpretation of the mechanism for the emergence of these hot springs. The results of the analysis informed that the origin of hot water was local meteoric water. The geological structure was weak enough to allow water from the geothermal reservoir to reach the surface and meteoric water into the reservoir.

scholarly journals Material Analysis Supporting Cement Industry Muara Dua Area South Oku Regency South Sumatera

2020 ◽  
Vol 8 (1) ◽  
pp. 9-16
Author(s):  
Desianto Payung Battu ◽  
Jamaluddin Jamaluddin ◽  
Fathony Akbar Praktikno
Keyword(s):  
Iron Oxide ◽  
Research Area ◽  
Geological Mapping ◽  
Cement Industry ◽  
Geochemical Analysis ◽  
Analysis Method ◽  
Material Analysis ◽  
Silica Alumina ◽  
Geochemical Method ◽  
Marly Limestone

Material cement industry are mostly formed by carbonate and silica. Geology of Muara Dua area was contain those material used in cement industry. Mineralogy of carbonate this area mostly formed by Calcium (Ca) contained on Calcite (CaCO3), Dolomite (CaMg(CO3)2) while Silica, Alumina, Iron Oxide element found as SiO2, Al2O3, Fe2O3, MgO on rock. Research area mostly generated by tectonically complex where the sedimentation mostly controlled the existence of material using in cement industry. Three analysis method were conducted which are Geological Mapping to describe macro petrology, Petrography analysis to determine mineralogy microscopic and Geochemical method using XRF to identified chemical mineralogy of rock. Limestone is one of lithology unit that develop on research area where known as Packstone to Wackestone (Petrography) while "Calcitic Limestone” to “Marly Limestone” classification from Geochemical analysis (XRF). Another material such as Silica and trass material are definitely found on this research area to support cement industry. Element for support cement industry that exist on Muara Dua area formed due to sedimentation process that effected by tectonic and volcanic.

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