Numerical simulation of coast effect on magnetotelluric measurements

Malleswari, D.; Veeraswamy, K.

doi:10.1007/s40328-013-0039-z

Cited by 8 publications

(4 citation statements)

References 24 publications

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“…These features were interpreted as images of fossil pathways of the volcanic emplacements associated with the greenstone belt and granite suite formation exposed in the region. Below EGMB is a thin lithosphere which forms the exterior margin of Indian shield subsequent (Malleswari et al 2019).…”

Section: Dharwar Craton Karnatakamentioning

confidence: 99%

“…Dharwar craton (DC) and Eastern Ghat Mobile Belt (EGMB), lithosphere architecture of the cratonic domain were investigated by IITB, ISM (IIT), UCIL, CIST, CSIR-NGRI groups (Chandrasekhar et al, 2018;Singh et al, 2018;Malleswari et al, 2019;Pratap et al 2018;Kusham et al, 2018). Few MT traverses, cutting across the Western Ghat and east of the Western Ghat belt, were investigated by CSIR-NGRI group (Patro et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…North Singhbhum Mobile Belt (NSMB) and Dalma basalts of Proterozoic ages were mapped through resistivity model derived from MT data by ISM (IIT) group, (Maurya et al 2015, 18). CSIR-NGRI and CIST groups worked in Dharwar region (Malleswari et al 2019;Pratap et al 2018;Kusham et al 2018). CSIR-NGRI group investigated the Central Indian Shear (CIS) zone and Narmada-Son Lineament (NSL) of the Central Indian Tectonic Zone (CITZ), (Azeez et al 2017; Azeez, 2016; Patro and Sharma, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Magnetotelluric investigations in India during last five years

Israil¹,

Kumar²,

Devi³

et al. 2020

PINSA

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This paper reviews the Magnetotelluric (MT) studies carried out in India during last five years. These MT field studies covered area, which includes Garhwal Himalaya, Sikkim Himalaya; Indo-Gangetic Plain (IGP); Gujrat, Dharwar craton (DC), Eastern Ghat Mobile Belt (EGMB), North Singhbhum Mobile Belt (NSMB), Dalma basalts, Dharwar region, Central Indian Shear (CIS) zone, Narmada-Son Lineament (NSL), Cuddapah basin, Banaganapalli quartzites, Narji limestone, Koyna-Warna and 3D MT inversion software-AP3DMT. The field investigations aimed to delineate deep crustal structure, the basement depth geometry, resistivity structure in the Bhuj earthquake region, electrical resistivity characterization of Fault zones, mapping of geothermal source zone, lithosphere architecture. Software, AP3DMT-MATLAB code for 3D inversion of MT data was developed and tested. This code is made versatile and user friendly by an efficient use of MATLAB's inbuilt functions.

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Section: Dharwar Craton Karnatakamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magnetotelluric investigations in India during last five years

Israil¹,

Kumar²,

Devi³

et al. 2020

PINSA

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“…A surface layer of 5 m thickness was preferred, and the thickness of subsequent layers was increased appropriately to accommodate the resolution change of the data with depth. The oceans, Arabian Sea at the western end and Bay of Bengal located ~ 300 km east of the profile, were made a part of the starting model and kept fixed throughout the inversion to overcome the ocean effect on the MT data [ Malleswari and Veeraswamy , ]. Seawater resistivity of 0.3 Ωm was assumed.…”

Section: Present Mt Studymentioning

confidence: 99%

The electrical resistivity structure of lithosphere across the Dharwar craton nucleus and Coorg block of South Indian shield: Evidence of collision and modified and preserved lithosphere

et al. 2015

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Magnetotelluric-derived two-dimensional lithospheric resistivity structure of the western Dharwar craton (WDC) and adjoining Coorg block indicates isolated low-resistivity zones in the crust and three striking upper mantle conductive features within the highly resistive Archean lithosphere. The crustal conductors in the WDC show good spatial correlation with the exposed supracrustal rocks conformable with the relic schist belt channels having conductive mineral grains. Conductive zones within the Coorg crust might be related to the relatively young (933 Ma) metamorphic processes in the area and/or possible fluids derived from the Cretaceous passage of Reunion plume in the proximity of Coorg area. A near-vertical conductive structure extending from the lower crust into the upper mantle coincides with the transition zone between Coorg and WDC. This is interpreted as the suture zone between the two tectonic blocks and provides evidence for the individuality of the two Archean terrains. An anomalous upper mantle conductive zone found beneath the craton nucleus may indicate a modified cratonic lithosphere. This could have been derived due to the collision between Coorg and WDC and possibly survived by the subsequent multiple episodes of melt and fluid infiltration processes experienced in the region. Thick (~190 km) and preserved lithosphere is mapped at the eastern segment of WDC. Resistive lithosphere of~125 km thickness is imaged for the Coorg block.

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