Magnetotelluric investigations to identify geothermal source zone near Chabsar hotwater spring site, Ahmedabad, Gujarat, Northwest India

Mohan, Kapil; Kumar, G. Pavan; Chaudhary, Peush; Choudhary, Virender; Nagar, Mehul; Khuswaha, Dilip; Patel, Piyushkumar N.; Gandhi, Drasti; Rastogi, B. K.

doi:10.1016/j.geothermics.2016.10.001

Cited by 24 publications

(10 citation statements)

References 15 publications

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“…These studies as an off shoot bring out the potential showing the scope and prospective of the MT studies in hydrocarbon, geothermal exploration, resource location, seismogenesis etc. Some details of these applied studies can be found in the research publications (Sarma et al, 1983;Gupta et al, 1996;Bhattacharya et al, 2003;Sarma et al, 2004;Harinarayana et al, 2006a;Satpal et al, 2006;Pandey et al, 2009;Sinharay et al, 2010;Rawat et al, 2014;Patro et al, 2015;Sircar et al, 2015;Arora et al, 2017;Mohan et al, 2017;Patro, 2017). Therefore, case studies Article presented here are carefully selected to highlight the allied applications.…”

Section: Introductionmentioning

confidence: 99%

Electrical conductivity structure along a few transects over the Indian Lithospheric domains

Patro

2020

Episodes

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Section: Introductionmentioning

confidence: 99%

Electrical conductivity structure along a few transects over the Indian Lithospheric domains

Patro

2020

Episodes

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“…As a deep geophysical technique, the magnetotelluric (MT) method is being widely used for the assessment of geothermal fields in many regions and is also the most appropriate electromagnetic technique to electrically image the subsurface structures [20]. In geothermal regions, it can provide useful information about the lateral and vertical variation of the resistivity of the subsurface.…”

Section: Rock Sample and Analysismentioning

confidence: 99%

Hydrogeochemical Characteristics and Genesis Model of Jinjiang and Julong Hot Springs in Changbai Mountain, Northeast China

2018

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Changbai Mountain in China has been explored as a potential area for its rich hot springs including the Jinjiang and Julong hot spring groups. The hydrogeochemical characteristics and conceptual genesis models of the Jinjiang and Julong hot springs were evaluated by hydrogeochemical analysis, isotope analysis, rock sample analysis, hydrogeochemistry simulation, and geophysical exploration method. The results showed that HCO3− and Na+ were the most abundant anion and cation in the hot springs, and the hydrochemical type was Na-HCO3. And the hot springs are enriched with trace components such as H2SiO3 and Sr. The major gas composition of the Jinjiang hot springs and Julong hot springs were CO2, N2, and CH4, which were derived from the mantle. The chemical compositions were produced by feldspar and pyroxene mineral hydrolysis. The recharge source of the hot springs was atmospheric precipitation and was also influenced by evaporation, and the genetic models for the Jinjiang hot springs and Julong hot springs were as follows: the heat source of both was a magma body and heat was mainly migrated in the form of thermal conduction. The cap rocks were both composed of trachyte of Baitoushan formation, basalt of Junjianshan formation, and rhyolitic pyroclastic rocks of Changbai formation. The geothermal reservoir of both hot springs was a fracture zone with the lithology of volcanic breccia, sand, and gravel and volcanic breccia and marble, respectively.

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“…MT has been applied in a range of areas and geological settings. A few examples of applications of the MT method in low enthalpy systems include: locating possible geothermal source zone in the Chabsar hot spring, India ( Mohan et al., 2017 ); the study of the geothermal zone in Hamam Faraun, Egypt, in order to identify the hot spring sources ( Abdel Zaher et al., 2012 ); and exploration of shallow geothermal fluid reservoirs for the Fang geothermal system, Thailand ( Amatyakul et al., 2016 ). MT has been used to clarify the geological structures associated with the Gediz Graben geothermal area in Turkey, using 3-D inversion to produce a conceptual model for the resistive basement rock structure ( Erdoğan and Candansayar, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Magnetotelluric data analysis using 2D inversion: A case study from Al-Mubazzarah Geothermal Area (AMGA), Al-Ain, United Arab Emirates

Saibi

Khosravi

Cherkose

et al. 2021

Heliyon

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Geothermal manifestations (hot springs) emerge in the Al-Mubazzarah Geothermal Area (AMGA), Al-Ain city, Abu Dhabi Emirate, United Arab Emirates. This paper presents the application and results of a Magnetotelluric (MT) survey, which was carried out in 2017 at the AMGA geothermal field. The MT method was used to investigate the variations in the electrical conductivity beneath the AMGA. This study focuses on characterizing the patterns of subsurface electrical conductivity of the AMGA geothermal reservoir. Dimensionality analysis of the measured MT data indicate that 2D inversion is appropriate for the subsurface resistivity interpretation. The inversion results support a model consisting of three resistivity-defined layers; from top to bottom they are: (1) a shallow layer with resistivity ranging from 10 to 20 Ωm, representing recent alluvial and windblown deposits, (2) a second conductive layer with resistivities less than 10 Ωm, beneath the first layer. This layer is recognized as the Tertiary carbonate sequence in the region, (3) a deep, moderate to relatively high resistive zone, 10–30 Ωm beginning at 800 m depth and reaching 4 km depth in the northern part of the profile, representing Mesozoic basement rocks. The observed moderate to high resistivity zone (10–30 Ωm) in the 2D model may represent a region where the hot groundwaters originated (geothermal reservoir), with the hottest geothermal located at a depth greater than 4 km. The geothermal reservoir zone is also represented by a low to high density contrast and a low to moderate magnetic susceptibility, as indicated in the inverted potential field data models, and confirmed the existence of a north dipping major fault.

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Magnetotelluric investigations to identify geothermal source zone near Chabsar hotwater spring site, Ahmedabad, Gujarat, Northwest India

Cited by 24 publications

References 15 publications

Electrical conductivity structure along a few transects over the Indian Lithospheric domains

Electrical conductivity structure along a few transects over the Indian Lithospheric domains

Hydrogeochemical Characteristics and Genesis Model of Jinjiang and Julong Hot Springs in Changbai Mountain, Northeast China

Magnetotelluric data analysis using 2D inversion: A case study from Al-Mubazzarah Geothermal Area (AMGA), Al-Ain, United Arab Emirates

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