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 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 Geothermal Systems Characteristics in Pesanggrahan Area, Bawang Distric, Batang Regency, Based on Geology and Geochemistry Analysis

2019 ◽  
Vol 125 ◽  
pp. 14002
Author(s):  
Rakhmadi Sulistyanto ◽  
Udi Harmoko ◽  
Gatot Yuliyanto
Keyword(s):  
Hot Springs ◽  
Hot Spring ◽  
Descriptive Analysis ◽  
Hot Water ◽  
Geothermal System ◽  
Water Type ◽  
Geothermal Systems ◽  
Volcanic System ◽  
Geothermal Fluid ◽  
Chloride Water

Research conducted at Pesanggrahan area, Sangubanyu Village, Bawang District, Batang Regency with geographical coordinates at 7°5'00 "00 S - 7°7'30" 00 S, and 109 ° 56'00 "E-109°58'30"E, with an area of around 25 Km². Research methods used quantitative and qualitative methods with descriptive analysis, geological and geochemical analysis. Geochemical fluid samples were taken in manifestations hot springs Pesanggrahan and hot water samples in Sibanteng and Sileri Crater to determine the relationship with geothermal systems in this area. Geomorphology divided into two geomorphology units, they are steep slope and sloping hill. Stratigraphy can be divided into three lithologies, which are andesite breccia, tuff breccia, and tuff sandstone. Based on fluid geochemical characteristics of manifestations, it can be interpreted that hot spring of Pesanggrahan area is outflow zone with bicarbonate-chloride water type, Sibanteng Crater and Sileri Crater, include upflow zone with water type sulfate for Sibanteng Crater, bicarbonate-sulfide water type for Sileri Crater. Environmental source geothermal fluid Pesanggrahan from the magmatic volcanic process. Sources geothermal fluid in Pesanggrahan, Sibanteng and Sileri Crater from meteoric water. Estimated temperature Pesanggrahan in the interval 50-100°C, Sileri Craters 160-180°C, and Sibanteng Craters 140-150°C. The Conceptual model of Pesanggrahan includes a geothermal system that associated with volcanic system and high relief liquid dominated system.

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 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 Application of MT dan Gravity Method to Potential Analysis of Kepahiang Geothermal Bengkulu

2018 ◽  
Author(s):  
ahmad zarkasyi ◽  
Boko Nurdiyanto ◽  
yunus daud
Keyword(s):  
Hot Springs ◽  
Ground Surface ◽  
Reservoir Rock ◽  
Geothermal System ◽  
Physical Parameters ◽  
Reservoir Temperature ◽  
Geothermal Potential ◽  
Cap Rock ◽  
Residual Heat

An analysis of geothermal potential in Kepahiang-Bengkulu area using gravity and MT measurements of PSDG has been done. The analysis was conducted on 286 gravity points and 37 MT points spread over the southern part of Mount Kaba to Babakan Bogor hot springs. Kepahiang geothermal system is related to the volcanic activity of Mount Kaba which is still preserving the residual heat from the magma. Based on the gravity residual anomaly, the structure that controls the emerging Sempiang hot springs is estimated to be Sempiang fault that in near north-south direction, while Babakan Bogor hot springs is estimated to be controlled by the Sumatra fault. The cap rocks scatter around Sempiang hot springs start from nearground surface with thickness of between 1500 meters to 2500 meters. Cap rock is a unit of Young Lava of Kaba with resistivity &lt; 10 Ohm-m and density is 2.2 gr/cm3. Geothermal reservoir is estimated to be located under the cap rocks scatter around Sempiang hot prings as indicated by values of 10-60 Ohm-m in resistivity and density is 2.4 gr/cm3. The top of reservoir is estimated to be 1500 meters below the ground surface, these rocks are volcanic products of Old Kaba in form of either lava or pyroclastic. Kepahiang geothermal prospect area scatters 19 km2 wide around Sempiang hot springs which is bound by contrast resistivity and fault. It has potential geothermal of 133 MWe with the assumption of reservoir temperature (geochemistry) is 2500C. Calculation of geothermal potential is included in the classification of expected reserves, as well as the extent and thickness of reservoir rock and fluid physical parameters are estimated based on data integrated geosciences detail depicted in the model tentatively.

scholarly journals Identification of Subsurface Rock Structure of Non-Volcanic Geothermal Systems Based on Gravity Anomalies (Terak Village, Central Bangka Regency)

2021 ◽  
Vol 5 (2) ◽  
pp. 539-543
Author(s):  
Reza Firdaus ◽  
Siska Oktaviyani ◽  
Putri Hardianti ◽  
Tri Kusmita ◽  
Anisa Indriawati
Keyword(s):  
Hot Springs ◽  
Continuation Method ◽  
Bouguer Anomaly ◽  
Gravity Anomalies ◽  
Hot Water ◽  
Reservoir Rock ◽  
Geothermal System ◽  
Geothermal Systems ◽  
Rock Structure ◽  
Free Air Anomaly

Abstract   Geothermal manifestations on Bangka Island are found in the villages of Terak, Pemali, Sungailiat/Pelawan, Dendang, Permis, and Nyelanding. The manifestation of hot water in Terak Village, Central Bangka Regency is in the form of 3 hot springs with a surface temperature of 55ᵒC this research is to be carried focus on the structure of the subsurface rock layers using the geophysical method, namely the gravity method. The data used are topography and Free Air Anomaly. The data processing is in the form of Bouguer Correction and Terrain Correction to obtain the Complete Bouguer Anomaly (CBA) value. Then the CBA value is separated from regional anomalies and residual anomalies using the upward continuation method, as well as 2D modeling interpretation (forward modeling). From the research results, it is known that the subsurface rock structure of the non-volcanic geothermal system in Terak Village in the form of sandstone (2.28 – 2.49 gr/cm3) at a depth of 0 – 1.44 km is estimated as caprock, granite (2.77 – 2.78 gr/cm3) at a depth of 0 – 1.8 km is estimated as reservoir rock, and diorite rock (2.87 – 2.99 gr/ cm3) at a depth of 0 – 2 km is estimated as basement rock.    

scholarly journals Integrated Resistivity and Ground Penetrating Radar Observations of Underground Seepage of Hot Water at Blawan-Ijen Geothermal Field

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Sukir Maryanto ◽  
Ika Karlina Laila Nur Suciningtyas ◽  
Cinantya Nirmala Dewi ◽  
Arief Rachmansyah
Keyword(s):  
River Flow ◽  
Hot Springs ◽  
Hot Spring ◽  
Depth Resolution ◽  
Hydrothermal Activity ◽  
Geothermal Field ◽  
Hot Water ◽  
Geothermal System ◽  
Ground Penetrating ◽  
Reliable Methods

Geothermal resource investigation was accomplished for Blawan-Ijen geothermal system. Blawan geothermal field which located in the northern part of Ijen caldera presents hydrothermal activity related with Pedati fault and local graben. There were about 21 hot springs manifestations in Blawan-Ijen area with calculated temperature about 50°C. We have performed several geophysical studies of underground seepage of hot water characterization. The geoelectric resistivity and GPR methods are used in this research because both of them are very sensitive to detect the presence of hot water. These preliminary studies have established reliable methods for hydrothermal survey that can accurately investigate the underground seepage of hot water with shallow depth resolution. We have successfully identified that the underground seepage of hot water in Blawan geothermal field is following the fault direction and river flow which is evidenced by some hot spring along the Banyu Pahit river with resistivity value less than 40 Ωm and medium conductivity.

Precise magnesium isotope analyses of high-K and low-Mg rocks by MC-ICP-MS

2019 ◽  
Vol 34 (5) ◽  
pp. 940-953 ◽  
Author(s):  
Zhian Bao ◽  
Kangjun Huang ◽  
Tianzheng Huang ◽  
Bing Shen ◽  
Chunlei Zong ◽  
...  
Keyword(s):  
Igneous Rock ◽  
Magnesium Isotope ◽  
Rock Samples ◽  
High K ◽  
Icp Ms ◽  
Isotope Analyses

This study presents a chemical protocol for the separation of Mg that is particularly adapted for diverse igneous rock samples, especially for high-K and low-Mg rocks.

scholarly journals Prospects of Using Hydrocarbon Deposits from the Autochthonous Miocene Formation (Eastern Carpathian Foredeep, Poland) for Geothermal Purposes

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3102
Author(s):  
Anna Chmielowska ◽  
Anna Sowiżdżał ◽  
Barbara Tomaszewska
Keyword(s):  
Oil And Gas ◽  
Geothermal System ◽  
Vast Number ◽  
Hydrocarbon Traps ◽  
Oil And Gas Fields ◽  
Geothermal Potential ◽  
Carpathian Foredeep ◽  
And Migration ◽  
Gas Fields ◽  
Geothermal Parameters

There are many oil and gas fields around the world where the vast number of wells have been abandoned or suspended, mainly due to the depletion of reserves. Those abandoned oil and gas wells (AOGWs) are often located in areas with a prospective geothermal potential and might be retrofitted to a geothermal system without high-cost drilling. In Poland, there are thousands of wells, either operating, abandoned or negative, that might be used for different geothermal applications. Thus, the aim of this paper is not only to review geothermal and petroleum facts about the Eastern Carpathian Foredeep, but also to find out the areas, geological structures or just AOGWs, which are the most prospective in case of geothermal utilization. Due to the inseparability of geological settings with both oil and gas, as well as geothermal conditionings, firstly, the geological background of the analyzed region was performed, considering mainly the autochthonous Miocene formation. Then, geothermal and petroleum detailed characteristics were made. In the case of geothermal parameters, such as formation’s thickness, temperatures, water-bearing horizons, wells’ capacities, mineralization and others were extensively examined. Considering oil and gas settings, insights into reservoir rocks, hydrocarbon traps and migration paths issues were created. Then, for evaluating geothermal parameters for specific hydrocarbon reservoirs, their depths were established based on publicly available wells data. Thereafter, the average temperatures for selected reservoirs were set. As the effect, it turned out that most of the deposits have average temperatures of 40/50 °C, nonetheless, there are a few characterized by higher (even around 80 °C) temperatures at reasonable depths.

scholarly journals Origin of the low-medium temperature hot springs around Nanjing, China

2021 ◽  
Vol 13 (1) ◽  
pp. 820-834
Author(s):  
Jun Ma ◽  
Zhifang Zhou
Keyword(s):  
Hot Springs ◽  
Hot Spring ◽  
Hot Water ◽  
Geothermal Water ◽  
Geological Condition ◽  
Medium Temperature ◽  
Rock Interaction ◽  
Karst Landform ◽  
Karst Landforms ◽  
Development And Management

Abstract The exploration of the origin of hot spring is the basis of its development and utilization. There are many low-medium temperature hot springs in Nanjing and its surrounding karst landform areas, such as the Tangshan, Tangquan, Lunshan, and Xiangquan hot springs. This article discusses the origin characters of the Lunshan hot spring with geological condition analysis, hydrogeochemical data, and isotope data. The results show that the hot water is SO4–Ca type in Lunshan area, and the cation content of SO4 is high, which are related to the deep hydrogeological conditions of the circulation in the limestone. Carbonate and anhydrite dissolutions occur in the groundwater circulation process, and they also dominate the water–rock interaction processes in the geothermal reservoir of Lunshan. The hot water rising channels are deeply affected by the NW and SN faults. Schematic diagrams of the conceptual model of the geothermal water circulation in Lunshan are plotted. The origin of Tangshan, Tangquan, and Xiangquan hot springs are similar to the Lunshan hot spring. In general, the geothermal water in karst landforms around Nanjing mainly runs through the carbonate rock area and is exposed near the core of the anticlinal structure of karst strata, forming SO4–Ca/SO4–Ca–Mg type hot spring with the water temperature less than 60°C. The characters of the hot springs around Nanjing are similar, which are helpful for the further research, development, and management of the geothermal water resources in this region.

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