Special Issue: Special section for IUGG workshop: Lithospheric Structure of a Supercontinent:Gondwana
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Electromagnetic imaging of magma across the Narmada Son lineament, central India
Earth, Planets and Space volume 56, pages 229–238 (2004)
Wide band magnetotelluric (MT) studies were undertaken over a 130 km long, approximately north-south profile in central India across the Narmada Son lineament (NSL) that runs through Indian peninsula in ENE-WSW direction and its contiguous region. The NSL and its contiguous zone in the study region consists of Narmada graben, Satpura horst and Tapti-Purna graben, which are arranged from north to south as this order within the zone. The obtained deep crustal resistivity structure shows two deep-seated conductive features, which locate below the Tapti River on the southern flank of the Satpura horst (South conductor) and below Dorwa on the Narmada graben (North conductor), respectively. Both conductive features have identical resistivities of 10–200 Ohm-m and extend from 7 km to about 50 km in depth. Integration with gravity, heat flow and the deep seismic reflection studies suggests that these conductive bodies may have different causative factors. The South conductor, which is embedded in a high heat flow and a negative Bouguer gravity anomaly area, seems to be due to magma intrusion into the crust leading to high heat flows in the region. On the contrary, the North conductor is not characterized by high heat flow however seismic reflectors in this region show a domal feature. It is thus conjectured that the north conductive feature may be caused by the tectonic activity and partially molten magma emplacement from the asthenospheric levels into the crust.
Geological Survey of India, Geoscientific Studies of the Son-Narmada-Tapti Lineament Zone, Project CRUMANSONATA, Special Pub. No. 10, 1995.
Gokarn, S. G., C. K. Rao, B. P. Singh, and P. N. Nayak, Magnetotelluric studies across the Kurduwadi gravity feature, Phys. Earth Planet. Inter., 72, 58–67, 1992.
Gokarn, S. G., C. K. Rao, G. Gupta, B. P. Singh, and M. Yamashita, Deep crustal structure in central India using magnetotelluric studies, Geophys. J. Int., 144, 685–694, 2001.
Groom, R. W. and R. C. Bailey, Decomposition of magnetotelluric impedance tensor in the presence of local three-dimensional galvanic distortion, J. Geophys. Res., 94, 1913–1925, 1989.
Jones, A. G., Static shift of magnetotelluric data and its removal in a sedimentary basin environment, Geophysics, 53, 967–978, 1988.
Jones, A. G. and I. Dumas, Electromagnetic image of a volcanic zone, Phys. Earth and Planet. Inter., 81, 289–314, 1993.
Jones, A. G. and H. Jödicke, Magnetotelluric transfer function estimation improvement by coherence based technique, Paper presented at 54th annual international meeting of Soc. of Expl. Geophysics, Atlanta, Ga., Dec. 2–6, 1984.
Kaila, K. L., P. R. Reddy, M. M. Dixit, and P. Koteswara Rao, Crustal structure across Narmada-Son lineament, Central India from deep seismic soundings, J. Geol. Soc. India, 26, 465–480, 1985.
Kailasam, L. N., Plateau uplift in peninsular India, Tectonophysics, 61, 243–269, 1979.
Naik, P. N., Deep Crustal Configuration of Central India, Geological survey of India, Special Pub. No. 28, 67–98, 1990.
Naskar, D. C, K. Chowdary, K. K. Roy, O. P. Singh, and R. K. Majumdar, Geophysical approach for delineation of shallow crustal structure along Borgaon-Sanwer transect, Madhya Pradesh, J. Geol. Soc. of India, 60, 173–181, 2002.
Ogawa, Y., On two-dimensional modeling of magnetotelluric field data, Surv. Geophys., 23, 251–272, 2002.
Pascoe, E. H., Manual of Geology of India and Burma, Vol. I, Govt. of India Publ. Calcutta, India, pp. 285–287, 1959.
Rao, C. K., S. G. Gokarn, and B. P. Singh, Upper crustal structure in the Torni-Purnad region, Central India, using magnetotelluric studies, J. Geomag. Geoelectr, 47, 411–420, 1995.
Raval, U. and K. Veeraswamy, The radial and linear modes of interaction between Mantle Plume and continental lithosphere: A case study from western India, J. Geol. Soc. India, 56, 525–536, 2000.
Ravi Shanker, Heat flow map of India and discussion on its geological and economic significance, Indian Minerals, 42, 89–110, 1988.
Rodi, W. and R. L. Mackie, Nonlinear conjugate gradients algorithm for 2D magnetotelluric inversions, Geophysics, 66, 174–187, 2001.
Venkata Rao, K., Paleomagma chamber in the upper crust—Plaussible secondary source for Deccan basalts of the Satpura region in central India, J. Geol. Soc. India, 50, 673–680, 1997.
Venkata Rao, K. and P. N. Nayak, Geoscientific Studies of the Son-Narmada-Tapti Lineament Zone, Project CRUMANSONATA, Geological Survey of India, Special Pub. No. 10, 155–180, 1995.
Verma, R. K., Gravity field, DSS and crust mantle relationship in peninsular India, Proc. Int. Symp. Deep Seismic Sounding Traverses, edited by K. L. Kaila and H. C. Tiwari, Assocn. Expl. Geophys., Hyderabad, India, 27–41, 1986.
Verma, R. K. and P. Banerjee, Nature of continental crust along the Narmada-Son lineament inferred from gravity and deep seismic sounding data, Tectonophysics, 202, 375–397, 1992.
Wu, N., J. R. Booker, and J. T. Smith, Rapid two-dimensional inversion of COPROD2 data, J. Geomag. Geoelectr., 45, 1073–1087, 1993.
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Rao, C.K., Ogawa, Y., Gokarn, S.G. et al. Electromagnetic imaging of magma across the Narmada Son lineament, central India. Earth Planet Sp 56, 229–238 (2004). https://doi.org/10.1186/BF03353405
- conductor lineament