scholarly journals Hydrogeochemical Characterization as a Tool to Recognize “Masked Geothermal Waters” in Bahía Concepción, Mexico

Resources ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 23
Author(s):  
Pablo Hernández-Morales ◽  
Jobst Wurl ◽  
Carlos Green-Ruiz ◽  
Diego Morata
Keyword(s):  
Spatial Distribution ◽  
Thermal Water ◽  
Elevated Temperatures ◽  
Ph Value ◽  
Spring Water ◽  
Geothermal Resources ◽  
Geothermal Waters ◽  
New Approach ◽  
Deep Reservoir ◽  
Hydrogeochemical Characterization

Geo-thermalism has been widely recognized on the Baja California Peninsula, especially during the last decade. The current research, carried out on Bahia Concepcion, evidences the existence of geothermal springs, which get recharged mainly by groundwater and seawater. The groundwater can be characterized as Na+-Cl− and Na+-HCO3− type, with a pH value close to neutrality. The slightly more acidic thermal sites presented temperatures between 32 °C and 59 °C at the surface. Based on the relationships of the Cl− and Br−, as well as the B/Cl−, and Br−/Cl− ratios, seawater was recognized as the main source of salinity. The spatial distribution is explained directly through marine intrusion, or via sprays and aerosols within the rainwater. Seawater ratios in thermal springs varied from 62% to 83%, corresponding mainly to shallow inflow, but seawater inputs into the deep thermal reservoir were also recognized. Temperatures in the geothermal deep reservoir were inferred from 114 to 209 °C, calculated through the SiO2 and Na+-K+ geothermometers. In addition to previously reported thermal sites at Bahía Concepción, and based on their elevated temperatures, two new sites were identified. Another five springs do not fulfill the commonly used definition, based on differential temperature, but show the typical hydrogeochemical signature of thermal water. A new approach to identify this low-temperature geothermal-influenced spring water by its hydrogeochemical composition is presented, for which the term “Masked Geothermal Waters” (MGW) is introduced. Our findings increase the area of the geothermal anomaly and, therefore, the potential of geothermal resources. The approach proposed in this research will also be useful to identify more MGW in other coastal areas.

A New Approach to Fluorescent Chemosensor of Cu2+ Ion

2014 ◽  
Vol 513-517 ◽  
pp. 65-69
Author(s):  
Xiao Jun Hu ◽  
Xin Yan Hu ◽  
Zhi Zhang
Keyword(s):  
Aqueous Solution ◽  
Electron Transfer ◽  
Self Assembly ◽  
Ph Value ◽  
Sodium Dodecyl ◽  
Fluorescence Emission ◽  
Fluorescent Chemosensor ◽  
Dynamic Quenching ◽  
Transfer Effects ◽  
New Approach

According to the principle of dynamic quenching a new ON-OFF fluorescent chemosensor for Cu2+ions was designed, this chemosensor was composed of p-tert-butylthiacalix [arene (TCA),sodium dodecyl sulfate (SDS) and perylene through the form of self-assembly in aqueous solution. Addition of Cu2+ions could result in a quenching of the fluorescence emission of perylene inside micelles, which due to intramicellar complex-fluorophore electron-transfer or energy-transfer effects induced by the complexation of TCA with the Cu2+ions.The experimental results indicated that: Under the condition of TCA/perylene was 800/1, SDS concentration was 150mmol/L and pH value above 9, according to the fluorescence quenching ,within a certain range of the concentration of Cu2+ion can be linearly determined.

PROSPECTS FOR DEVELOPMENT OF GEOTHERMAL RESOURCES AT THE YURKOVKA SECTION TARUMOVSKY DEPOSITS OF THERMAL WATER

2020 ◽  
Author(s):  
D.K. Javatov ◽  
◽  
K.M. Akhmedov ◽  
A.A. Azizov ◽  
◽  
...  
Keyword(s):  
Thermal Water ◽  
Geothermal Resources

На примере участка Юрковка Тарумовского месторождения теплоэнергетических вод рассмотрены перспективы освоения геотермальных ресурсов. Рассмотрена проблема правильного выбора технологических параметров геотермальных циркуляционных систем, обеспечивающих эффективное использование тепловой энергии. Наличие источника практически неограниченной тепловой энергии позволяют рассматривать перспективы использования геотермальных ресурсов месторождения для отопления и горячего водоснабжения больших площадей теплиц. Проведено исследование изменения энергии полной мощности и энергии обратной закачки в зависимости от температуры закачиваемого теплоносителя Проведены оптимизационные расчеты для данного месторождения термальных вод для геотермальной циркуляционной системы с вертикальной водозаборной и вертикальной нагнетательной скважинами и с вертикальной водозаборной и горизонтальной нагнетательной скважинами. В связи с чем актуальна проблема оценки возможного количества, извлекаемой тепловой энергии, на основе различных технологий.

scholarly journals Seismic Methods in Geothermal Water Resource Exploration: Case Study from Łódź Trough, Central Part of Poland

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Tomasz Maćkowski ◽  
Anna Sowiżdżał ◽  
Anna Wachowicz-Pyzik
Keyword(s):  
Estimation Error ◽  
Geophysical Methods ◽  
Petroleum Industry ◽  
Geological Structure ◽  
Seismic Survey ◽  
Energy Potential ◽  
Geothermal Resources ◽  
Geothermal Waters ◽  
Seismic Methods ◽  
Geophysical Surveys

The geothermal waters constitute a specific type of water resources, very important from the point of view of their thermal energy potential. This potential, when utilized, supplies an ecological and renewable energy, which, after effective development, brings many environmental, social, and industrial benefits. The key element of any geothermal investment is the proper location of geothermal installation, which would guarantee the relevant hydrogeothermal parameters of the water intake. Hence, many studies and analyses are carried out in order to characterize the reservoir parameters, including the integrated geophysical methods. For decades, the geophysical surveys have been the trusty recognition methods of geological structure and petrophysical parameters of rock formations. Thus, they are widely applied by petroleum industry in exploration of conventional and unconventional (shale gas/oil, tight gas) hydrocarbon deposits. Advances in geophysical methods extended their applicability to many other scientific and industrial branches as, e.g., the seismic survey used in studies of geothermal aquifers. The following paper presents the opportunities provided by seismic methods applied to studies of geothermal resources in the central Poland where the geothermal waters are reservoired in both the Lower Cretaceous and the Lower Jurassic sedimentary successions. The presented results are obtained from a network of seismic profiles. An important advantage of the seismic survey is that they may support the selection of an optimal location of geothermal investment and determination of the geometry of geothermal aquifer. Furthermore, the application of geophysical methods can significantly contribute to the reduction of estimation error of groundwater reservoir temperature.

The potential for geothermal lithium in Italy

2021 ◽  
Author(s):  
Pierfranco Lattanzi ◽  
Andrea Dini ◽  
Giovanni Ruggieri ◽  
Eugenio Trumpy
Keyword(s):  
Rechargeable Batteries ◽  
Thermal Waters ◽  
Past Century ◽  
Geothermal Resources ◽  
High Enthalpy ◽  
The Past ◽  
Geothermal Fluids ◽  
Deep Reservoir ◽  
Increasing Demand ◽  
Made In

<p>Italy has never been a lithium (Li) producer, and the potential for “hard rock” deposits is moderate at best. On the other hand, the increasing demand for Li-based rechargeable batteries fostered new interest in this metal, and prompted the quest for alternative resources. The extraction of Li from geothermal brines (“geothermal lithium”) is currently considered in several countries, including, in Europe, France, Germany, and UK (EGEC, 2020).</p><p>Italy has vast geothermal resources, and there is a potential for “geothermal lithium” as well. A preliminary survey of literature data pointed out several occurrences of fluids with Li contents up to hundreds of mg/L. Among high-enthalpy fluids, we point out those of Cesano, Mofete, and Latera. At Cesano, geothermal fluids contain about 350 mg/L lithium (Calamai et al., 1976). Early studies conducted in the past century (Pauwels et al., 1990) suggested the feasibility of lithium recovery from these fluids. Even higher contents (480 mg/L) occur in the deep reservoir at Mofete (Guglielminetti, 1986), whereas fluids in the shallow and intermediate reservoir in the same field contain 28 to 56 mg/L. Geothermal fluids at Latera have somewhat lower contents (max 13.5 mg/L; Gianelli and Scandiffio, 1989). Several low-enthalpy thermal waters in Emilia-Romagna, Sardinia, Sicily and Tuscany also show significant (> 1 mg/L) Li contents (max 96 mg/L at Salsomaggiore; Boschetti et al., 2011). There are no published Li data for high-enthalpy fluids at Larderello; however, evidence of Li-rich fluids was found in fluid inclusions in hydrothermal minerals (Cathelineau et al., 1994). Moreover, the shallow (ca. 3.5 km) granitoid body underlying the field contains a Li-rich (about 1,000 ppm) biotite (A. Dini, unpublished data); it has been estimated that such rock may contain as much as 500 g Li per cubic meter.</p><p> </p><p>References</p><p>Boschetti T., et al. - Aquat Geochem (2011) 17:71–108</p><p>Calamai A., et al. <strong>- </strong>Proc. U.N. Symp. Development Use Geotherm. Energy, S. Francisco, USA (1976), 305-313</p><p>Cathelineau M., et al. – Geochim. Cosmochim. Acta (1994) 58: 1083-1099</p><p>EGEC (European Geothermal Council). https://www.egec.org/time-to-invest-in-clean-geothermal-lithium-made-in-europe/. Accessed December 2, 2020.</p><p>Gianelli G., Scandiffio G. - Geothermics (1989) 18: 447-463</p><p>Guglielminetti M. - Geothermics (1986) 15: 781-790</p><p>Pauwels H., et al. - Proc. 12th New Zealand Geothermal Workshop (1990), 117-123</p>

scholarly journals Method for Monitoring of Managing the Modernization of Regional Economy

2019 ◽  
Vol 71 ◽  
pp. 04004
Author(s):  
T. Krasnova ◽  
T. Plotnikova ◽  
A. Pozdnyakov ◽  
A. Vilgelm
Keyword(s):  
Spatial Distribution ◽  
Economic Activity ◽  
Urban Areas ◽  
Regional Economy ◽  
Regional Level ◽  
Market Potential ◽  
New Economic Geography ◽  
Local Market ◽  
Data Set ◽  
New Approach

This paper proposes a new approach for monitoring of managing the modernisation of regional economic. The model built on proposed methodology will make it possible to smooth out the influence of non-urban areas on the unevenness of economic activity in spatial development. This paper has two goals. The first is to provide a new compilation of data on spatial distribution of economic activity at the sub-regional level. This data set allows us to monitoring of different indicators within macroregions such as Siberia. The second goal is to construct an instrument that helps to overcome the endogeneity problem using new economic geography hypothesis about the mechanisms of distribution of economic activity. Section 2 describes the data and method that we have proposed, discusses the construction of the Theil indexes using these data at the sub-federal and the sub-regional level. Section 3 presents the correlations between spatial distribution of economic activity and local market potential, discusses the robustness of the results; and the last section concludes.

scholarly journals Systematic Analysis of Geothermal Resources in the Coastal Bedrock Area of Chunxiao Town (China) by Using Geochemistry and Geophysics Methods

Water ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 214
Author(s):  
Wei Zhao ◽  
Yanzhu Lin ◽  
Pengpeng Zhou ◽  
Guangcai Wang
Keyword(s):  
Thermal Water ◽  
Shallow Groundwater ◽  
Water Yield ◽  
Reservoir Temperature ◽  
Geothermal Resources ◽  
Systematic Analysis ◽  
Effective Utilization ◽  
Scientific Exploration ◽  
Hydrochemical Data ◽  
Geophysical Investigations

Geochemical and geophysical investigations were carried out to obtain more evidence of the potential of geothermal resources in Chunxiao Town (China). Hydrochemical data indicate the possible existence of mixing process between deep geothermal water and shallow groundwater. Analysis with SiO2 geothermometer shows that the geothermal reservoir temperature was estimated around 40–60 °C. In addition, combination investigations with CSAMT, radioactive radon, and soil thermal-released mercury detection reveal the specific location of the conduction fractures for thermal water circulation. Furthermore, the drilling work shows the deep thermal water temperature of >55 °C and the thermal water yield of 300 m3/d. All these results could provide important guidance for the scientific exploration and effective utilization of geothermal resources in coastal area.

scholarly journals Chemical characteristics of snow in the region along the Sea of Japan

1993 ◽  
Vol 18 ◽  
pp. 227-233 ◽  
Author(s):  
Kazuhide Satow
Keyword(s):  
Spatial Distribution ◽  
Electric Conductivity ◽  
Sea Of Japan ◽  
Ph Value ◽  
Chemical Components ◽  
Chemical Characteristics ◽  
The Sea Of Japan ◽  
Heavy Snowfall ◽  
Asian Continent ◽  
Ph Values

The amount of acidity in precipitation has been measured in heavy-snowfall regions facing the Sea of Japan. The average pH value of precipitation measured throughout the year at Nagaoka was 4.80 during 4.5 years, 1987–92. During winter the pH value is lower and electric conductivity higher. The spatial distribution of chemical components in new-fallen snow was studied along a 55 km-long sampling route. Results from four surveys showed that acidic snows have average pH values of 4.63–4.90. From the distribution of anion and cation concentration in new-fallen snow, it is concluded that strong northwest monsoons during winter bring an abundance of snow with salt components and many non-salt components from the Sea of Japan and also, possibly, from the Asian continent.

PROBE — Profile Resolution Obtained by Excitation

1978 ◽  
Vol 32 (4) ◽  
pp. 381-388 ◽  
Author(s):  
R. M. Measures
Keyword(s):  
Spatial Distribution ◽  
Spatial Resolution ◽  
Pump Pulse ◽  
Probe Pulse ◽  
Laser Pulses ◽  
Laser Induced Fluorescence ◽  
Line Of Sight ◽  
Theoretical Formulation ◽  
New Approach ◽  
Fluorescence Methods

A new approach for evaluating, with spatial resolution, the line of sight properties of a specific constituent is proposed. This PROBE (profile resolution obtained by excitation) concept involves the use of two counter-propagating laser pulses; a pump pulse to condition the medium and a probe pulse to interrogate the medium where the pulses overlap. In this way, information regarding the spatial distribution of a species is transformed into temporal information in the form of a change in the amplitude of a returned probe pulse. For certain situations the PROBE technique offers several advantages over scattering or laser induced fluorescence methods. A theoretical formulation of the concept clearly indicates the importance of the lifetime of the pumped state.

A new approach to soil classification mapping based on the spatial distribution of soil properties

Geoderma ◽  
2014 ◽  
Vol 219-220 ◽  
pp. 106-116 ◽  
Author(s):  
Alessandra Fagioli da Silva ◽  
Maria João Pereira ◽  
João Daniel Carneiro ◽  
Célia Regina Lopes Zimback ◽  
Paulo Milton Barbosa Landim ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Soil Properties ◽  
Soil Classification ◽  
New Approach
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