Abstract
The spectral study of the Bouguer anomally map of Central India suggests an uplifted crust-mantle interface under the Mahandi graben. This study has delineated three subsurface levels of anomalous masses at the respective depths of 23 km, 8 km, and 2 km apparently representing the Moho, an intermediate discontinuity in the sialic part of the crust and the basement, respectively. Model study of the Bouguer anomaly along a profile suggests a typical continental graben type subsurface structure with a low density depression in the sialic part of the crust between 8 and 18 km supported by an elevated upper mantle of intermediate density (∼3.4 g/cm3) varying in depth from 25 km to 55 km. The depths of the inferred interfaces in case of Bundelkhand granite are 32 km, 11 km, and 1.5 km, which might represent the Moho, the base of intruded granite massif, and some shallow compositional variation. Similar studies in case of Vindhyan basin have brought out three discontinuities at the respective depths of 16 km, 6–4.5 km, and 2.4 km. The first horizon at the depth of 16 km probably represents the interface between the granitic and the basaltic part of the crust. The 6–4.5 km is the depth of the basement, with the 2.4 km interface separating Bijawar rocks from Vindhyans wherever they are present. A generalized inversion of a profile across a positive belt of Bouguer anomaly representing the subsurface Bijawar rocks support the above result.
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References
Crawford, A. R. (1970),The Precambrian Geochronology of Rajasthan and Bundelkhand, Northern India, Can. J. Earth Sci.7, 91–110.
Fox, C. S. (1934),The Lower Gondwana Coal Fields in India, Mem. Geol. Surv. India59.
Fuchs, K. (1979),Geophysical Contribution to Taphrogenesis, inApproaches to Taphrogenesis (E. Schweizerbart'sche Verlagsbuchhandlung (Naegele und Obermiller), Stuttgart 1974), pp. 420–432.
Griffiths, D. H., King, E. F., Khan, M. A., andBlundell, D. J. (1971),Seismic Refraction Line in the Gregory Rift, Nature (Physical Sciences)229, 66–71.
Hahn, A. (1965),Two Applications of Fourier Analysis for the Interpretation of Geomagnetic Anomalities, J. Geomagn. Geoelect.17, 195–225.
Hahn, A., Kind, E. G., andMishra, D. C. (1976),Depth Estimation of Magnetic Sources by Means of Fourier Amplitude Spectra, Geophys. Prospect.24, 287–308.
Holmes, A.,Principle of Physical Geology (Nelson, London and Edinburgh 1965), p. 1288.
Illies, J. H.,Graben Tectonics as Related to Grust-Mantle Interaction, International Upper Mantle Project Scientific Report No. 27, Proceedings of an International Rift Symposium held in Karlsruhe, October 10–12, 1968 (E. Schweizerbart'sche Verlagsbuchhandlung (Naegle u. Obermiller), Stuttgart 1970), pp. 4–26.
Illies, J. H., andFuchs, K.,Approaches to Taphrogenesis, Proceedings of an International Rift Symposium held in Karlsruhe, April 13–15, 1972 (E. Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart 1974).
Jhingran, A. G. (1958),The Problem of Bundelkhand Granite and Gneises, Presidential address, 45th Indian Science Congress.
Kaila, K. L., Roychowdhury, K., Reddy, P. R., Krishna, V. G., Narain, H., Subbotin, S. I., Sollogub V. B., Chekunov, A. V., Kharetchko, G. E., Lazarenko, M. A., andIlchenko, T. V. (1979),Crustal Structure along Kavali-Udipi Profile in the Indian Peninsular Shield from Deep Seismic Sounding, J. Geol. Soc. India20, 307–333.
Kailasam, L. N. (1976),Geophysical Studies on Major Sedimentary Basins of the Indian Craton, Their Deep structural Features and Evolution, Tectonophysics36 (1–4), 225–245.
Khan, M. A., andMansfield, J. (1971),Gravity Measurements in Gregory Rift, Nature (Physical Sciences)229, 72–75.
Mishra, D. C., andNaidu, P. S. (1974),Two-Dimensional Power Spectral Analysis of Aeromagnetic Fields, Geophys. Prospect.22, 345–353.
Mishra, D. C. (1977),Possible Extension of Narmada-Son Lineament from Marray Ridge in the West to the Eastern Syntaxial Bend in the East, Earth and Planat. Sci. letters36, 301–308.
Mueller, St.,Evolution of the Earth's Crust, inTectonics and Geophysics of Continental Rifts (eds. I. B. Ramberg and E. R. Neuman), NATO Advanced Study Institute Series (D. Reidel Publishing Co. 1977),37, 11–28.
Mueller, St., Peterschmitt, E., Fuchs, K., andAnsorge, J. (1969),Crustal Structure Beneath the Rhine Graben from Seismic Refraction and Reflection measurements (Special issue on the world Rift symposium), Tectonophysics8, 529–542.
Naidu, P. S. (1968),Spectrum of the Potential Field due to Randonly Disturbed Sources, Geophysics,33, 337–345.
Naidu, P. S. (1970),Fourier Transform of Large-Scale Aeromagnetic Fields using a Modified Version of Fast Fourier Transform, Pure Appl. Geophys.81, 17–25.
Naidu, P. S., andMishra, D. C. (1979),Digital Analysis of Geophysical Maps, a monograph under publication.
National Geophysical Research Institute (1969),Report on Airborne Magnetometer and Scintillometer Surveys over Parts of Panna Chattarpur and Tikamgarh Districts, Madhya Pradesh (India), a technical report for restricted circulation.
Pascoe, F. H. (1950),Manual of Geology of India and Burma I
Pascoe, F. H. (1959),Manual of Geology of India and Burma II.
Rhinegraben Research Group for Explosion Seismology,The 1972 Seismic Refraction Experiment in the Rhine Graben, inApproaches to Taphrogenesis (E. Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart 1974), pp. 122–137.
Subba Rao, D. V. (1977),Gravity Studies over Mahanadi and South Rewa-Gondwana Basins of India, a thesis submitted to the Andhra University (India) for the award of Doctor of Philosophy.
Talwani, M. (1973),Computer Usages in the Computation of Gravity Anomalies, inMethods in Computational Physics (ed. B. Alder),13, 343–389.
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Mishra, D.C., Tiwari, R.K. Spectral study of the Bouguer anomaly map of a rift valley and adjacent areas in Central India. PAGEOPH 119, 1051–1062 (1981). https://doi.org/10.1007/BF00878969
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DOI: https://doi.org/10.1007/BF00878969