Abstract
Bakreswar Geothermal Province (BGP) lies over the Archaean gneisses and schists formations. The heat flow and geothermal gradient of BGP are \(\sim \)230 mW/m\(^{2}\) and \(95{^{\circ }}\hbox {C}/\hbox {km}\), respectively. The Bakreswar hot spring (BHS) (\(23{^{\circ }}52^\prime 30^{\prime \prime }\hbox {N}\); \(87{^{\circ }} 22^{\prime }30^{\prime \prime }\hbox {E}\)) is located over NNW–SSE trending fault. It lies in the eastern flank of BGP and is connected by Sone–Narmada–Tapti (SONATA) and deep-seated ONGC fault systems. Earlier studies indicated that the geothermal fluid flowed towards the same path as that of deep ONGC fault. In view of this, 24 audio-magnetotelluric soundings in the frequency range 10 kHz–10 Hz were conducted at one end of the deep ONGC fault, which is about 20 km northwest of BHS. The data analysis indicated that the data are internally consistent. Analysis of dimensionality and strike are indicative of complex conductivity structures. The 3D inversion of full impedance was performed to obtain a conductivity model of the study area and resulted in root mean square (RMS) for sites close to unity. The results have been discussed by extracting cross-section along 3 to 7 profiles (four of the profiles are perpendicular to strike, whereas three profiles were oblique to the strike direction and are perpendicular to east–west trending ONGC faults). Several low conducting zones are observed in the profiles drawn parallel and perpendicular to the strike. These common conductors show consistent model features but modified resistivity and dimension. Depth slices from 200 to 1400 m suggest that the conductors in the northern part of the study area are deeper than the conductors in the south. The study area is dominated by several shallow conductors which coincide with several fractures present in the study area. The conductors are surrounded by a resistive feature that can act as an impermeable bed and probably restricts the flow of water within the zone. The four major conductors along the oblique profiles (profiles perpendicular to deep ONGC fault) coincide with deep ONGC fault, through which probably the geothermal fluid flows.
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References
Amatyakul P, Rung-Arunwan T and Siripunvaraporn W 2015 A pilot magnetotelluric survey for geothermal exploration in MaeChan region, northern Thailand; Geothermics 55 31–38.
Bahr K 1991 Geological noise in magnetotelluric data: A classification of distortion types; Phys. Earth Planet. Inter. 66 24–38.
Bartel L C and Jacobson R D 1987 Results of a controlled-source audio frequency magnetotelluric survey at the Puhimau thermal area, Kilauea Volcano, Hawaii; Geophysics 52 665–677.
Berdichevsky M N 1999 Marginal notes on magnetotellurics; Surv. Geophys. 20 341–375.
Bhattacharya B B, Sinharay R K and Shalivahan S S 2002 Audio magnetotelluric (AMT) investigations for 2D electrical conductivity modeling over geothermal province of Bakreswar, eastern India; In: 72nd Annual international meeting, SEG, Expanded Abstracts, pp. 488–491.
Chandrasekharam D 2000 Geothermal energy resources of India; In: Proceedings of world geothermal energy congress, pp. 133–145.
Chaudhuri H, Das N K, Bhandari R K, Sen P and Sinha B 2010 Radon activity measurements around Bakreswar thermal springs; Radiat. Meas. 45 143–146.
Chaudhuri H, Bari W, Iqbal N, Bhandari R K, Ghose D, Sen P and Sinha B 2011 Long range gas-geochemical anomalies of a remote earthquake recorded simultaneously at distant monitoring stations in India; Geochem. J. 45 137–156.
Chowdhury A N, Bose B B and Banerjee G 1964 Studies of geochemistry of thermal spring at Bakreswar; Report of 22nd Session, IGC, Part XII, pp. 143–160.
Deb S and Mukherjee A L 1969 On the genesis of a few groups of thermal springs in the Chotanagpur Gneissic Complex, India; J. Geochem. Soc. India 4 1–9.
Desikachar S V 1974 Himalayan orogeny and plate tectonics a geological interpretation; Misc. Publ. Geol. Surv. India 34 29–39, Part 1.
Garcia X, Ledo J and Queralt P 1999 2D inversion of 3D magnetotelluric data; Earth Planets Space 51 1135–1143.
Ghaedrahmati R, Moradzadeh A, Fathianpour N, Lee S K and Porkhial S 2013 3-D inversion of MT data from the Sabalan geothermal field, Ardabil, Iran; J. Appl. Geophys. 93 12–24.
Ghose D, Chowdhury D P and Sinha B 2002 Large-scale helium escape from earth surface around Bakreswar-Tantloi geothermal area in Birbhum district, West Bengal, and Dumkadistrict, Jharkhand, India; Curr. Sci. India 82 993–996.
Harinarayana T, Azeez K K A, Murthy D N, Veeraswamy K, Rao S P E, Manoj C and Naganjaneyulu K 2006 Exploration of geothermal structure in Puga geothermal field, Ladakh Himalayas, India by magnetotelluric studies; J. Appl. Geophys. 58 280–295.
Heasler H P, Jaworowski C and Foley D 2009 Geothermal systems and monitoring hydrothermal features; In: Geological Monitoring, pp. 105–140, https://doi.org/10.1130/2009.monitoring(05).
Majumdar R K, Majumdar N and Mukherjee A L 2000 Geoelectric investigations in Bakreswar geothermal area, West Bengal, India; J. Appl. Geophys. 45 187–202.
Majumdar N, Majumdar R K, Mukherjee A L, Bhattacharya S K and Jani R A 2005 Seasonal variations in the isotopes of oxygen and hydrogen in geothermal waters from Bakreswar and Tantloi, Eastern India: Implications for groundwater characterization; J. Asian Earth Sci. 25 269–278.
Meqbel N M, Egbert G D, Wannamaker P E, Kelbert A and Schultz A 2014 Deep electrical resistivity structure of the northwestern U.S. derived from 3-D inversion of US Array magnetotelluric data; Earth Planet. Sci. Lett. 402 290–304.
Mukhopadhyay D K and Sarolkar P B 2012 Geochemical appraisal of Bakreswar-Tantloi hot spring, West Bengal and Jharkhand, India; In: Thirty-seventh workshop on geothermal reservoir engineering, Stanford University, Stanford, California.
Mukhopadhyay M, Verma R K and Ashraf M H 1986 Gravity field and structures of the Rajmahal Hills: Example of the Paleo-Mesozoic continental margin in eastern India; Tectonophys. 131 353–367.
Nagar R K, Vishwanathan G, Sagar S and Sankaranaraanan A 1996 Geological, geophysical investigation in Bakreshwar-Tantloie thermal field, Birbhum and Santhal-Parganas districts, West Bengal and Bihar, India; In: Geothermal energy in India (eds) Pitale U L and Padhi R N, Geol. Surv. India Publ. 45 87–98.
ONGC 1969 Tectonic map of India; Oil and Natural Gas Commission, Dehradun, India.
Oskooi B, Pedersen L B, Smirnov M, Arnason K, Eysteinsson H and Manzella A, the DGP Working Group 2005 The deep geothermal structure of the Mid-Atlantic Ridge deduced from MT data in SW Iceland; Phys. Earth Planet. Inter. 150 183–195.
Park S K and Mackie R L 2000 Resistive (dry?) lower crust in an active orogen, Nanga Parbat, northern Pakistan; Tectonophys. 316 359-380, https://doi.org/10.1016/S0040-1951(99)00264-4
Park S K and Torres-Verdin C 1988 A systematic approach to the interpretation of magnetotelluric data in volcanic environments with applications to the quest for magma in Long Valley, California; J. Geophys. Res.: Solid Earth 93(B11) 13265–13283, https://doi.org/10.1029/JB093iB11p13265.
Parkinson W D 1959 Directions of rapid geomagnetic fluctuations; Geophys. J. Int. 2 1–14.
Pellerin L, Johnston J M and Hohmann G W 1996 A numerical evaluation of electromagnetic methods in geothermal exploration; Geophysics 61 121–130.
Rybach L 2010 Status and prospects of geothermal energy; In: Proceedings of world geothermal congress, Vol. 5, pp. 1–5.
Sarkar A N 1982 Precambrian tectonic evolution of eastern India: A model of converging microplates; Technophys. 86 363–397.
Shalivahan S S, Sinharay R K and Bhattacharya B B 2006 Remote reference magnetotelluric impedance estimation of wideband data using hybrid algorithm; J. Geophys. Res. 111 B11103, https://doi.org/10.1029/2006JB004330.
Shanker R 1988 Heat-flow map of India and discussion on its geological and economic significance; Indian Mineral. 42(2) 89–110.
Shanker R, Guha S K, Seth N N, Ghosh A, Ghosh S, Nandy D R, Jangi B L and Mathuraman K 1991 Geothermal atlas of India; Geol. Surv. Ind. Spec. Publ. 19 110–113.
Simpson F and Bahr K 2005 Practical magnetotellurics; Cambridge University Press.
Singh H K, Chandrasekharam D, Vaselli O, Trupti G, Singh B, Lashin A and Al Arif N S 2015 Arifi-chemical characteristics of Jharkhand and West Bengal thermal springs along SONATA mega lineament, India; J. Earth Syst. Sci. 124(2) 419–430.
Singh A, Dehiya R, Gupta P K and Israil M 2017 A MATLAB based 3D modeling and inversion code for MT data; Comput. Geosci. 104 1–11.
Sinharay R K 2006 Application of Magnetotelluric (MT) method for the study of geothermal resources in Bakreswar, Eastern India; PhD Thesis, Indian School of Mines, Dhanbad.
Sinharay R K, Shalivahan S S and Bhattacharya B B 2010 Audiomagnetotelluric studies to trace the hydrological system of thermal fluid flow of Bakreswar Hot Spring, Eastern India: A case history; Geophysics 75 187–195.
Swift C M 1967 A magnetotelluric investigation of an electrical conductivity anomaly in the south western United States; PhD Thesis, Massachusetts Institution of Technology, Cambridge.
Takasugi S, Tanaka K, Kawakami N and Muramatsu S 1992 High spatial resolution of the resistivity structure revealed by a dense network MT measurement; J. Geomagn. Geoelectr. 44 289–308, https://doi.org/10.5636/jgg.44.289.
Tripathi A, Maurya V P, Srivastava S, Singh S, Bage A, Bhattacharya B B, Sinharay and Rajib K 2015 Bakreswar Geothermal Reservoir revealed from AMT results; In: 77th EAGE conference.
Uchida T 1995 Resistivity structure of Sumikawa geothermal field, northeastern Japan, obtained from magnetotelluric data; In: Proceedings of the world geothermal congress, pp. 921–925.
Volpi G, Manzella A and Fiordelisi A 2003 Investigation of geothermal structures by magnetotellurics (MT): An example from the Mt. Amiata area, Italy; Geothermics 32 131–145.
Vozoff K 1991 The magnetotelluric method; In: Electromagnetic method in applied geophysics (ed.) Nabighian M N, Soc. Explor. Geophys. 2 641–711.
Wannamaker P E, Rose P E, Doerner W M, Berard B C, McCulloch J and Nurse K 2004 Magnetotelluric surveying and monitoring at the Coso geothermal area, California, in support of the enhanced geothermal systems concept: Survey parameters and initial results; In: Proceedings, 29th workshop on geothermal reservoir engineering, Stanford University.
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AT conveys his sincere thanks to IIT (ISM), Dhanbad, for providing all the support to carry out this work. SV thanks the DST and UGC for their support. AT thanks Arun Singh, Department of Earth Science, IITR, for performing 3D inversion using AP3DMT. SSS thanks RKS for reading the paper critically.
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Tripathi, A., Shalivahan, S.S., Bage, A.K. et al. Audio-magnetotelluric investigation of Bakreswar Geothermal Province, Eastern India. J Earth Syst Sci 128, 102 (2019). https://doi.org/10.1007/s12040-019-1115-8
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DOI: https://doi.org/10.1007/s12040-019-1115-8