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Structural Study of Meghalaya Plateau Through Aeromagnetic Data
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The study of aeromagnetic data over parts of Assam-Meghalaya has delineated major discontinuities representing faults/fractures/contacts/shears and magnetic body axes, which helped in understanding the regional and structural setup of the area. The known Barapani and Dapsi Thrusts, Dudhnai Fault and three strong magnetic anomalies with reverse magnetisation have been delineated. The quantitative analysis of aeromagnetic data brought out the depths of magnetic interfaces and the magnetic picture of different layers, which also helped in understanding the regional and structural setup. The contact modeling across few profile sections showed the depths to the top of contacts and the map of magnetic-basement-depth-model revealed the undulations of the basement. Magnetic body axes of several magnetic anomalies and also several magnetic discontinuities representative of faults/ fractures/ contacts/ shears system in the area along with five potential blocks for mineral prospecting are the main outcome of this exercise. The seismotectonic activity associated with the magnetic features has also been studied to understand the structural setup.
Keywords
Structural Study, Aeromagnetic Data, Meghalaya.
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- BAROOAH, B.C. (1976) Tectonic pattern of the Precambrian rocks around Tyrssad, Meghalaya. Geol. Surv. India Misc. Publ., No.23 (Part II), pp.485-496.
- BELOUASSOV, V.V. (1962) Basic problems of Geotectonics. McGraw-Hill.
- BHATTACHARYA, R.S., KAR, N. and GHOSH, D. (F.S. 1977-78) A Short note on test magnetic and gravity traverse for detection of the ultrabasic body in Sung valley, Meghalaya. F.S. 197778. Geol. Surv. India, Unpubld. Report.
- CHATTOPADHYAY, N. and HASHIMI, S. (1984) The Sung Valley alkaline ultrmafic carbonatite complex, East Khasi and Jaintia Hills districts, Meghalaya. Rec. Geol. Surv. India, v.113(IV), pp.2433.
- DAS, A.P., PATHAK, B. and BAISHYA, R.C. (F.S. 1989-91) Report on regional gravity and magnetic surveys for delineation of ultramafic/ ultra-basic bodies with special emphasis for the search of platinoids in Sung Valley and adjoining areas, East Khasi and Jaintia Hills Districts, Meghalaya. F.S. 1989-91. Geol. Surv. India, Unpubld. Report.
- EVANS, P. (1964) The tectonic frame work of Assam. Jour. Geol. Soc. India, v.5, pp.80-96.
- GHOSH, S, CHAKRABORTY, S., BHALLA, J.K., PAUL, D.K., SARKAR AMITABHA, BISHUI, P.K. and GUPTA, S.N. (1991) Geochronology and Geochemistry of Granite Plutons from East Khasi Hills, Meghalaya. Jour. Geol. Soc. India, v.37, pp.331-342.
- GSI (2000) Seismotectonic Atlas of India and its Environs, Seisat14.
- GSI, NGRI, ONGC, O.I.L. (2006) Bouguer Gravity Anomaly (Terrain Corrected) Map of India with Station Distribution.
- GUPTA, R.P. and SEN, A.K. (1988) Imprints of the Ninety-East Ridge in the Shillong Plateau, Indian Shield. Tectonophysics, v.154, pp.335-341.
- HASAN, K. (1985) Report on the geophysical surveys for Magnetite, Apatite occurrences in the Sung Valley Complex, Jaintia Hills District, Meghalaya, F.S.1984-85. Geol. Surv. India, Unpubld. Report.
- HASAN, K. and THAKURIA, N.C. (1993) Report on magnetic (VF) surveys as ground follow-up work of aeromagnetic anomalous band E-2 and other magnetic features, south east of Tura, East and West Garo Hills District, Meghalaya, F.S.1988-89. Geol. Surv. India, Unpubld. Report.
- JAWAHAR, G. and RAGHURAMAIAH, K. (1993) Report on the regional gravity and magnetic surveys along Guwahati-Shillong Road, F.S. 1989-90. Geol. Surv. India, Unpubld. Report.
- KAYAL, J.R. (1987) Microseismicity and source mechanism study: Shillong Plateau, northeast India. Seismological Soc.Amer. Bull., v.77, pp.184-191.
- KAYAL, J.R. and ZHAO, DAPENG (1998) Three-Dimensional seismic structure beneath Shillong Plateau and Assam Valley, Northeast India. Seismological Soc. Amer. Bull., v.88, pp.667-676.
- KHAN, P.K. and CHAKRABORTY, P.P. (2007) The seismic b-value and its correlation with Bouguer gravity anomaly over the Shillong Plateau area: Tectonic implications. Science Direct. Jour. Asian Earth Sci., v.29, pp.136-147.
- KRISHNAN, M.S. (1960) Geology of India and Burma. Higgin Bothams, Madras, 553p.
- KUMAR, S., DHANARAJU, R., VARMA, H.M. and DOUGALL, N.K. (1984) Cancrinite-Tinguite and K-rich trachyte in the Nongcharam-Darugiri area of East Garo Hills District, Meghalaya: A preliminary study. Jour. Geol. Soc. India, v.25 pp.528-532.
- MATHEW, M.P. (1988) Computer programs developed at AMSE Wing, GSI, Bangalore. Geol. Surv. India, Unpubld. Report MAZUMDER, S.K. (1976) A summary of the Precambrian geology of the Khasi hills, Meghalaya. Geol.Surv. India, Misc. Publ., No.23(Part II), pp.311-334.
- MAZUMDER, S.K. (1986) The Precambrian framework of part of the Khasi Hills, Meghalaya. Rec. Geol.Surv.India, v.117(2), pp.1-59.
- MITRA, S.K. (1998) Structural history of the rocks of the Shillong group around Sohiong, east Khasi hills,Meghalaya. Indian Jour. Geol., v.70, pp.123-131.
- MUKHOPADHYAY, M. (1984) Seismotectonics of transverse lineaments in the eastern Himalaya and its foredeep. Tectonophysics, v.109, pp.227-240.
- MURTHY, CH.V.V.S., GOUDA, H.C.,SINGH, R.K. and NAGARAJU, B.V. (2007) Report on Interpretation of Aeromagnetic Data in parts of West Khasi Hills and Kamrup Districts of Meghalaya and Assam, F.S. 2006-2007.
- MURTHY, M.V.N., MAZUMDER, S.K. and BHAUMIK, N. (1976) Significance of tectonic trends In the geological evolution of the Meghalaya uplands since Precambrian. Geol. Surv. India, Misc. Publ., No.23, pp.471-484.
- NAIDU, P.S. and MATHEW, M.P. (1988a) Computer program for radial and angular spectrum estimation. Geol. Surv. India, Unpubld. Report.
- NAIDU, P.S. and MATHEW, M.P. (1998) Analysis of Geophysical Potential Fields: A Digital Signal Processing Approach. Advances in Exploration Geophysics, v.5, Elsevier, Netherlands.
- NAYAK, P.N., ROY, J.C. and PRAKASH, D. (F.S. 1975-76) Geophysical investigations for detecting zones of sulphide mineralisation in Barapani-Mawiong area, District Khasi hills, Meghalaya, F.S. 1975-76. Geol. Surv. India, Unpubld. Report.
- NGRI Map (1977) Total Intensity aeromagnetic map of AssamMeghalaya, generated and interpreted after aerial survey during Nov-Dec1977 by NGRI.
- PARTHASARATHI, E.V.R. (1978) Lineament Map of N.E. India, GSI Map.
- PATHAK, B., SYIEN, S.M. and ZAHIDI, A. (2006) Report on gravity– magnetic survey along Guwahati-Shillong Road, in parts of Assam and Meghalaya, outside F.S.P. 2003-04. Geol. Surv. India, Unpubld. Report.
- PATHAK, B. and SYIEM, S.M. (2006a) Report on gravity-magnetic mapping in parts of Ribhoi, East and West Khasi Hills District, Meghalaya, F.S. 2003-2004. Geol. Surv. India, Unpubld. Report.
- PRASAD, R.K. (1983) Geological Report on Ground Evaluation of Aeromagnetic Features in toposheet Nos. 83C/3,7 and 8 Jaintia Hills District, Meghglaya. Geol. Surv. India, Unpubld. Report for F.S.1982-84.
- RAMA RAO, M.S.V., BHATTACHARYA, R.S., SAHA, K. and RAO, C.M. (F.S. 1981-82) Report on geophysical investigation as ground follow up of the aeromagnetic anomaly (HA3) in Pynthorlangteine area, Jaintia Hills District, Meghalaya, State, F.S. 1981-82. Geol. Surv. India, Unpubld. Report
- RAVINDRA, R., PRASAD, R.K., DUARA, B.K. and MISHRA, S.N. (1994) On the Efficacy of Integrated Study of Aeromagnetic data : A Case History from Meghalaya Plateau. Geol. Surv. India Spec. Publ. No.35, pp. 147-160.
- REDDI, A.G.B., MURTHY, B.S.R. and KESAVAMANI, M. (1995) A compendium of four decades of geophysical activity in Geological Survey of India, pp.91-94, Plates: NE-1 and NE-2.
- REEVES, C.V. (1985) Airborne Geophysics for Geological mapping and regional exploration. ITC Jour, v.3, pp.147-161.
- STANELY JOHN, M. (1977) Simplified magnetic interpretation of the geologic contact and thin dyke. Geophysics, v.42(6), pp.236-1240.
- VALDIYA, K.S. (1976) Himalayan transverse faults and folds and their parallelism with subsurface structures of North Indian plains. Tectonophysics, v.32, pp.353-386.
- VERMA, R.K. and MUKHOPADHAYAY, M. (1977) An analysis of the gravity field in northeastern India. Tectonophysics, v.142, pp.283-317.
- VENKATA RAMANA, M. and SAWAIYAN, S.C. (1993) Report on geophysical surveys for ground evaluation of aeromagnetic anomalous band E-1 and other magnetic features, Northwest and Northeast of Tura in the total intensity aeromagnetic (NGRI) map of Assam-Meghalaya West and East Garo hills Districts, Meghalaya, F.S.1989-90. Geol. Surv. India, Unpubld. Report.
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