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Central Indian tectonics revisited using aeromagnetic data
Earth, Planets and Space volume 55, pages e1–e4 (2003)
Aeromagnetic data, covering 600,000 km2 of Central India, have been analysed for the first time to throw light on the various tectonic blocks of the region, ranging in age from the Archean to the present. Existing geotectonic models are based on inadequate data and studies of relatively small regions. From the aeromagnetic data, we use the analytic signal and Euler deconvolution, to elucidate the subsurface structure of the region and redefine the tectonic elements. Contrary to the belief that the Central Indian shear defines the edge of the Central Indian craton, we find that the Sukinda thrust merges with the Tan shear to demarcate the edge of the Bastar and Eastern Ghat blocks by a shear that extends for approximately 1000 km in length. We call this the Main Peninsular shear. Magnetic anomaly data can thus play a crucial role in understanding the tectonic elements of a region with large surface cover.
Anand, S. P. and M. Rajaram, Study of Aeromagnetic data over part of Eastern Ghat Mobile Belt and Bastar craton, Gondwana Research, 2003 (communicated).
Anand, S. P., V. C. Erram, and M. Rajaram, Crustal structure delineation of Mahanadi basin from ground magnetic survey, J. Geol. Soc. India, 60, 283–291, 2002.
Geological Survey of India, Catalogue of Aero-Geophysical Maps, Airborne Mineral Surveys and Exploration Wing, Bangalore, India, 1995.
Geological Survey of India, Seismo Tectonic Atlas of India and its Environs, 2000.
Geosoft, Oasis Montage Data Processing and Analysis (DPA) systems for Earth Science applications (ver.4.3), Geosoft Inc., 1999.
Gokarn, S. G., C. K. Rao, G. Gupta, B. P. Singh, and M. Yamashita, Deep Crustal structure in the Central India from Magnetotelluric studies, Geophys. J. Int., 144, 685–694, 2001.
Mahadevan, T. M., Geology of Bihar and Jharkhand, 563 pp., Text Book Series, Geol. Soc. India, 2001.
Mishra, D. C., S. B. Gupta, M. B. S. V. Rao, and M. Venkatrayudu, Crustal structure and basement tectonics under Vindhyan Basin: Gravity and Magnetic study, Mem. Geol. Soc. India, 36, 213–224, 1996.
NGRI/GPH-2, Bouguer Gravity Anomaly Map of India, 1:5 million scale, 1975.
Ravi Shankar, Thermal and Crustal Structure of Sonata—a zone of mid-continental rifting in Indian Shield, J. Geol. Soc. India, 37, 211–220, 1991.
Reid, A. B., J. M. Allsop, H. Granser, A. J. Millett, and W. I. Somerton, Magnetic interpretation in three dimensions using Euler deconvolution, Geophysics, 55, 80–91, 1990.
Roest, W. R., J. Verhoef, and M. Pilkington, Magnetic interpretation using the 3D analytical signal, Geophysics, 57, 116–125, 1992.
Sarkar, A. N., Explanatory brochure on the Tectonic map of India, Geological Survey of India, 2001.
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.
Yedekar, D. B., S. C. Jain, K. K. K. Nair, and K. K. D. Dutta, The Central Indian collision suture, Geol. Survey India, Spl. Publication, 28, 1–43, 1990.
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Rajaram, M., Anand, S.P. Central Indian tectonics revisited using aeromagnetic data. Earth Planet Sp 55, e1–e4 (2003). https://doi.org/10.1186/BF03351743
- Aeromagnetic anomalies
- analytic signal
- Euler solutions
- Peninsular India
- Tectonic elements