检索结果-内蒙古大学图书馆

Geochemical Investigation on the Implications of Fluid Origin, Subsurface Processes and Recharge on the Tangkuban Perahu Geothermal Conceptual Model

SSRN

引用

SSRN 2022年

作者： Kobare, Nyora Donald Suryantini, Suryantini Iskandar, Irwan Geothermal Engineering Master’s Program Faculty of Mining and Petroleum Engineering Bandung Institute of Technology Jl. Ganesha 10 Bandung40132 Indonesia Department of Geosciences School of Mines and Geosciences University of Dar es Salaam 16103 Uvumbuzi Road Dar es Salaam Tanzania United Republic of Geological Engineering Study Program Faculty of Earth Sciences and Technology Bandung Institute of Technology Jl. Ganesha 10 Bandung40132 Indonesia

Tangkuban Perahu and nearby volcano-hosted geothermal prospects are believed to be important for future power generation in West Java, Indonesia. Recharge areas of these prospects and geothermal fluid evolution are not yet fully understood. The objectives of this investigation are to describe the fluid origin, processes, and evolution of geothermal fluids in relation to the recharge and the conceptual model of the Tangkuban Perahu Geothermal Systems (TPGS). The investigation involved sampling and analysis of geothermal waters, rainwater, and gases collected in fumaroles and other manifestations around the TPGS. Isotopic results of δ18O and δ2H collected from thermal and rainwater indicate deep-circulating meteoric origin, at an infiltration altitude ranges between 753-850 m in low terrain. Meanwhile, the high-standing terrain indicates the recharge zone to be within the wall of the Sunda Caldera and mountain slopes. Chondrite normalized patterns reveal an overall flat trendline that suggests the enrichment of Lower Rare Earth Elements (LREEs) in the central part of Tangkuban Perahu which is derived from the magmatic influx. The non-atmospheric gases origin was diagnosed by the lower N2/Ar (≤ 38) and is characterized of meteoric origin. The positive δ18O shifts from Ciater (CT), Batu Gede (BG), and Domas crater (KwD) geothermal waters samples comparatively to local meteoric lines are influenced by the interaction with wall rocks or magmatic influx. In these geothermal systems, the meteoric water infiltrated to the depth is heated, mixed with near-surface water, and followed by partial discharge as thermal springs along faults. © 2022, The Authors. All rights reserved.

关键词： Partial discharges

来源：评论

学校读者我要写书评

暂无评论

Experimental Instrumentation of Water Stage Monitoring Stations in Mountain Streams Bedrock Using Pressure Transducers

SSRN

引用

SSRN 2023年

作者： Quezada, Victor M. Hernandez Anguiano, Jesus Horacio Miranda, Raúl Padilla, Francisco Li, Yanmei Knappett, Peter S.K. Murrieta, Daniel Vázquez, Antonio Bian, Jianmin Doctoral Program of Water Science and Technology Engineering Division University of Guanajuato Guanajuato Guanajuato36000 Mexico Department of Mining Metallurgy and Geology Engineering University of Guanajuato Guanajuato Guanajuato36020 Mexico Department of Geomatics and Hydraulic Engineering University of Guanajuato Guanajuato Guanajuato36000 Mexico ETS of Engineering of Roads Canals and Ports University of La Coruña C. de Elviña 15071 Spain Department of Geology and Geophysics Texas A&M University College StationTX778432 United States Master Program of Water Science Engineering Division University of Guanajuato Guanajuato Guanajuato36000 Mexico Key Laboratory of Groundwater Resources and Environment Ministry of Education Jilin University Changchun130021 China College of New Energy and Environment Jilin University Changchun130021 China

This study presents a new method of installing non-vented pressure transducers with dataloggers to monitor river/streams stage in mountain areas. The installation was performed in the bedrock of the streams using a protective copper casing, next to streams natural control and without affecting their characteristics since it does not require infrastructure. This allowed the installation of 18 pressure transducers in areas with mining influence, urban and natural protected areas, among others. The results obtained show that the risks of damage to the pressure transducer due to extreme floods or vandalism are significantly reduced, and that it is possible to build monitoring stations using the natural section/channel controls or structure controls. The proposed method considerably reduces infrastructure and maintenance costs for stage monitoring, making it feasible to install in mountain rivers and streams with similar characteristics to those presented in this study. © 2023, The Authors. All rights reserved.

关键词： Pressure sensors

来源：评论

学校读者我要写书评

暂无评论

Lithium adsorption behaviour from Ciseeng geothermal brine water onto Amberlite resin

引用

AIP Conference Proceedings 2024年第1期3003卷

作者： Ariyo Suharyanto Miftakhur Rohmah Latifa Hanum Lalasari Mohammad Zaki Mubarok Research Center for Metallurgy National Research and Innovation Agency South Tangerang 15314 Banten Indonesia. Doctoral Program of Mining Engineering Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha 10 Bandung 40132 Indonesia. Department of Metallurgical Engineering Institut Teknologi Bandung Indonesia Faculty of Mining and Petroleum Engineering Jl. Ganesha 10 Bandung 40132 Jawa Barat Indonesia.

Lithium extraction from geothermal brines has recently become a strong interest due to the large volume of lithium resources in over 2000 geothermal wells and hot springs worldwide. This article discusses the adsorption behavior of lithium contained in local geothermal brine water originating from the Ciseeng geothermal field in Bogor Regency, West Java Province of Indonesia, by Amberlite IR-120 Na resin. The lithium uptake and the selectivity of lithium adsorption by Amberlite IR 120 Na resin towards alkaline and alkaline earth elements contained in the geothermal brine samples, the equilibrium behavior, and adsorption kinetics were studied. The experimental results show that lithium adsorption increased by the increase in contact time of brine water and Amberlite IR 120 in 4-day continuous adsorption and reached a maximum level at day-3 to 0.0356 mmol/g Li. Li adsorption decreased after day-3, indicating that the Li adsorption had reached an equilibrium state at day-3. The highest adsorption recovery during 4-day continuous adsorption is exhibited by K, followed by Li, Na, Ca, and Mg. Considering a low adsorption percentage of Li (maximum 36.6%) but still higher than that of Ca, Mg, and Na, the adsorption parameters are still to be improved. Linear fitting of the experimental data on the four different isotherm adsorption models indicated that the lithium adsorption from Ciseeng brine fit mostly with Freundlich and Temkin model with an adsorption capacity of the Amberlite IR 120 of 0.051 mg/g. Based on the linear fitting procedure of the experimental data to four different kinetics models, the lithium adsorption from Ciseeng brine onto Amberlite resin follows the Elovich kinetic model (R2 = 0.986), which indicates the dominant chemisorption mechanism in the lithium adsorption process.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Geology Controlling Factors of the Top Reservoir;Muara Laboh Geothermal System Case Studies 9

Geology Controlling Factors of the Top Reservoir;Muara Laboh...

引用

9th ITB International Geothermal Workshop 2020, IIGW 2020

作者： Sihotang, Mauliate Suryantini Azis, Herwin Stimac, Jim Baroek, Marino Geothermal Engineering Master's Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia PT. Supreme Energy Menara Sentraya 23rd Fl. Jl. Iskandar Syah Raya Jakarta12160 Indonesia Stimac Geothermal Consulting 4210 Chaparral Rd. Santa RosaCA95409 United States

Top of reservoir (TOR) determination is one of the resource keys features of the geothermal resource and significantly impacts the well's productivity (Casing Point Determination). It is defined from the conceptual model process and refined by the well temperature data. This paper will describe the geologic controls on the top of reservoir geometries of the Muara Laboh (ML). ML has located in step over-pull apart basins of the Great Sumatra Fault Zone segment. The features then accommodate the emplacement of quaternary to tertiary volcanic and intrusion. The geoscientific data from the existing conceptual model, well cuttings, cores, MeB test, and image log data were combined with the drilling parameter data (mud temperature & mud loses) to characterize the geology of the TOR. Drilling results show that wells in the NE sector have a shallower TOR. The TOR is located near the quaternary Patah Sembilan volcanic unit's contact with the undifferentiated silicic formation. The NE sector TOR corresponds with the change of alteration type from smectite rich argillic zone (240°C) identified underlaying the NE reservoir sector's transition zone. MeB Index below 10 seems to be corresponding with the base of conductive of 5 Ohm, and the NE TOR location. The SW sectors TOR sits a deeper elevation (∼300msl), lies within the intercalated dacite-andesite volcanic unit, higher temperature propylitic alteration zone, with epidote, epidote-adularia-quartz, and open space veins were observed below the TOR. Similar to the NE sector, the drop of the MeB index to less than ten, which is also related to the lithology contact, shows the possibility that the TOR has dropped in the SW sector. Below the low MeB zone, calcite infilled the fractures and sometimes encapsulated the pre-existing epidote vein;calcite then decreases with increasing epidote vein and epidote-adularia vein occurrence. The observation then suggests a rapid boiling process in the SW sectors due to the dropping of water l

关键词： Water levels

来源：评论

学校读者我要写书评

暂无评论

Comparison of ZnO Doped Different Phases TiO2 Nanoparticles in Terms of Toxicity Using Zebrafish (Danio Rerio)

SSRN

引用

SSRN 2022年

作者： Sezer, Selda Yücel, Ayşegül Turan, Duygu Özhan Emre, Fatma Bilge Sarikaya, Musa Malatya Turgut Ozal University Akcadag Vocational School Laboratory and Veterinary Health Program Akcadag Malatya Turkey Iskenderun Technical University Iskenderun Vocational School Environmental Protection and Control Program Hatay Iskenderun Turkey Inonu University Faculty of Engineering Department of Mining Engineering Malatya Turkey Inonu University Faculty of Arts and Science Department of Biology Malatya Turkey Inonu University Faculty of Education Department of Science Teaching Malatya Turkey

Titanium dioxide is used in many commercial and industrial areas such as paint, paper, cosmetics, textiles, and surface coating. The reasons for its use in such a wide area are its anti-corrosion and high stability. Although TiO2 is considered to be a low toxicity material, research has been further expanded following the recognition of the possible carcinogenic effects of TiO2 in humans by the International Agency for Research on Cancer (IARC). The aim of this study is to compare the toxicity of TiO2 used in many fields in different phases. In the study anatase TiO2 synthesized by hydrothermal method and dual phase TiO2 (anatase and rutile phase) structures obtained by thermal conditioning were used and compared with commercially available TiO2. ZnO which has similar uses like TiO2 was also used and compared with 1% doped TiO2 in different phases in terms of toxicity. Zebrafish (Danio rerio, D. rerio), a freshwater fish, which is widely used in toxicity assessments was preferred in this study due to its small size, fast reproduction rate, low cost, physiological and molecular similarity with humans, and genetic predisposition. Experimental investigations showed that the highest death occurred in the low concentrations of (10 ppm) ZnO doped rutile phase. 39% of the embryos died in the ZnO nanoparticle solutions prepared at low concentrations. The highest mortality at medium (100 ppm) and high (1000 ppm) concentrations were observed in the ZnO-doped rutile phase after 96 hours. Similarly, the highest malformation was detected in the ZnO-doped rutile phase during the same period. © 2022, The Authors. All rights reserved.

关键词： Titanium dioxide

来源：评论

学校读者我要写书评

暂无评论

Seismicity Analysis and Velocity Structure of the Two-Phase Geothermal Field in West Java, Indonesia: Preliminary Result 2

Seismicity Analysis and Velocity Structure of the Two-Phase ...

引用

2nd Southeast Asian Conference on Geophysics, SEACG 2018

作者： Firdaus Al Hakim, Muhamad Sule, Rachmat Hendriyana, Andri Master Program of Geothermal Engineering Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Indonesia Exploration and Engineering Seismology Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Indonesia

We observed 754 microearthquake data by at least 15 stations for six months as a tool to monitor and characterize the subsurface condition in two-phase geothermal field in Southern Bandung. The data were reduced to 417 events having azimuthal gap less than 180°. We determine the initial earthquake locations in this study by using Geiger method and we update the hypocenter locations by performing simultaneous inversion for hypocenters and 1D velocity structure followed by 3D tomographic inversion. We obtained the velocity structure by utilizing TomoDD to perform 3D tomographic inversion. There are four clusters of seismicity observed in this study which we suspected related to the injection, production, and tectonic activity of the study area. The southern cluster is consistent with the location of injection wells and spread from 1 km depth to 8 km depth, indicating that MEQ events were triggered by injection activity. The production area is characterized by a denser population of events and the events were distributed closely ranging from 1 to 3 km depth. We suspect that the third cluster is caused by development activity of steam dominated geothermal field omit in the east of our main field. The fourth cluster is located in the southernmost of our area and suspected caused by tectonic activity. Low Vp/Vs values near to the surface are observed in the north direction and coincide with the location of the first cluster. The location of anomaly is highly corresponded with the production area and the low value of Vp/Vs anomaly is interpreted as the steam zone. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Geothermal fields

来源：评论

学校读者我要写书评

暂无评论

A molecular dynamics study on CO2 diffusion coefficient in saline water under a wide range of temperatures, pressures, and salinity concentrations: Implications to CO2 geological storage

arXiv

引用

arXiv 2021年

作者： Omrani, Sina Ghasemi, Mehdi Mahmoodpour, Saeed Shafiei, Ali Rostami, Behzad Institute of Petroleum Engineering College of Engineering University of Tehran Tehran Iran Petroleum Engineering Program School of Mining & Geosciences Nazarbayev University Astana Nur-Sultan010000 Kazakhstan Institute of Applied Geosciences Geothermal Science and Technology Technische Universit t Darmstadt Darmstadt Germany

Carbon dioxide (CO2) sequestration in saline aquifers has been introduced as one of the most practical, long-term, and safe solutions to tackle a growing threat originating from the emission of CO2. Successfully executing and planning the process necessitates a comprehensive understanding of CO2 transport properties-particularly the diffusion coefficient, influencing the behavior of CO2 dissolution in water/brine regarding the shape of viscous fingers, the onset of instabilities, etc. In this research, Molecular Dynamics (MD) simulation was employed to compute the CO2 diffusion coefficient in various NaCl saline water concentrations (1-6 mol NaCl/kg water) under the broad spectrum of temperatures (294-423 K) and pressures (10-30 MPa) to acquire a data-set for the CO2 diffusion coefficient in different circumstances. According to the results, the NaCl concentration increase gives rise to a decrease in the CO2 diffusion coefficient, by which the reduction is most notably at higher temperatures. In fact, the presence of more cations due to the salinity concentration increase forms further hydration shells, acting as a barrier for CO2 diffusion. In addition, the rise in the CO2 diffusion at elevated temperatures can be explained by the cation's hydration shell size reduction with temperature increment due to intensifying repulsive forces among water molecules. We also proposed a new precise correlation for estimating CO2 diffusion coefficients over temperatures and salinity ranges of this study. Regarding the pressure variation effects, no tangible changes are observed with pressure increase, validating a negligible influence on the diffusion coefficient. Furthermore, the variability of the CO2 diffusion coefficient in the presence of other salts, namely MgCl2, CaCl2, KCl, and Na2SO4, were computed separately. Comparing the influence of various salts, CaCl2 and KCl have the highest and lowest effect on the CO2 diffusion coefficient, respectively. Finally, a set of direc

关键词： Carbon dioxide

来源：评论

学校读者我要写书评

暂无评论

Analysis from point of the view parents on mathematics learning using the grey systems theory 3

Analysis from point of the view parents on mathematics learn...

引用

3rd IEEE World engineering Education Conference, EDUNINE 2019

作者： Delgado, Alexi Ayala, Betsabe Department of Engineering Mining Engineering Section Mining Engineering Section Pontificia Universidad Católica Del Perú-PUCP Lima Peru Systems Engineering Program Universidad de Ciencias y Humanidades Lima Peru

ISBN: (纸本)9781728116662

Mathematics is a topic very important to achieve success during education and for life. In this way, the factors that could influence on mathematics learning, from the point of the view of parents, were analyzed. The approach used in this study was the grey clustering method, which is based on the grey systems theory. The case study was conducted in Lima, Peru. The sample of parents was obtained at the final stage of national competition of mathematics, commonly called CONAMAT, carried out after of previous stages of classification. The parents were divided in two groups, primary education parents and secondary education parents. The results revealed that the factor more important that influenced on the preference from students for mathematics learning were the vocation from students to sciences and the motivation from students to mathematics. The results of this study could help to mathematics teacher or educational authorities from Peru to make the best decision on mathematics teaching and learning. Moreover, the grey clustering method showed its effectiveness during the application on the case study, and it could be applied to other studies from social sciences or educational sciences, as the grey clustering method considers the uncertainty within its analysis. © 2019 IEEE.

关键词： Motivation

来源：评论

学校读者我要写书评

暂无评论

3D model of Krakatau volcano subsurface structure based on gravity data 1

3D model of Krakatau volcano subsurface structure based on g...

引用

1st International Seminar on Science and Technology 2018, ISST 2018

作者： Oemaiya, D.V. Santoso, D. Geophysical Engineering Study Program Faculty of Mining and Petroleum Engineering Institute of Technology Bandung Indonesia Applied and Exploration Geophysics Research Group Faculty of Mining and Petroleum Engineering Institute Technology Bandung Indonesia

Krakatau is one of the volcano in Indonesia which has the destructive paroxysmal eruption. Eruption on 1883 was estimated had VEI of 6. The eruption was recorded as one among some most violent volcanic eruption event in the world. Gravity method is one of the geophysical methods that could delineate the subsurface structure base on density variation. Therefore, the objectives of this research are to reconstruct the 3D subsurface structure of the Krakatau volcano especially the approximate location and dimension of the magma chamber. The subsurface model of Krakatau was done by 3D modelling using residual anomaly map. In order to develop the status of magma chamber model, the available information on the geological map of Krakatau and surrounding area was used. Besides that, some information relative to the volcano such as the information derived from earthquake wave attenuation were utilized. The result of the study shows that position its volcano magma chamber is not directly vertical or oblique under the volcano crater and it has multiple chambers which trending northwest-southeast. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Volcanoes

来源：评论

学校读者我要写书评

暂无评论

A Non-Linear Method for Hypocenter Determination around Central and East Java Region: Preliminary Result 2

A Non-Linear Method for Hypocenter Determination around Cent...

引用

2nd Southeast Asian Conference on Geophysics, SEACG 2018

作者： Muttaqy, Faiz Dian Nugraha, Andri Puspito, Nanang T Supendi, Pepen Rosalia, Shindy Geophysical Engineering Study Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Indonesia Global Geophysics Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Indonesia Bandung Indonesia

Java Island is highly active tectonic zone and also has a complex geological system as a result of Indo-Australian plate that subducted under the Eurasian plate. This complexity produces many large and destructive earthquakes. Moreover, Java is a most densely populated region in Indonesia. The precise earthquake location can define and evaluate the seismic hazard in the area. In this study, we determined hypocenter location around the central and east Java region by using a non-linear method. We manually picked P-and S-wave arrival time recorded by BMKG network for the time period of 2009 to 2017. We used the minimum 1D seismic velocity model of ak135 to locate the events. We used some criteria for the determination of event location including (i) at least recorded by 4 station which has clear onset P and S arrival, and (ii) has magnitude (MW) > 3. The seismicity in the study area is controlled by subduction and many active faults distributed along the Java Island, also clustered in several areas such as Kendeng thrust, Opak river fault, Kebumen, Banyuwangi, and others. The result of this study indicates the accurately main shallow seismicity zones in central and eastern part of Java region, and also confirm the presence of active inland faults. As further studies, we will conduct 1D velocity modeling and relocate the hypocenters using an updated local 1D velocity model beneath the study area. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Earthquakes

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：