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Co-Authors
- Rajendra Sharma
- Ch. V. V. S. Murthy
- B. V. Nagaraju
- H. C. Gouda
- A. Y. S. R. Chayanulu
- Rajesh K. Srivastava
- R. P. Hall
- R. Verma
- V. P. Mishra
- Ch. V. VS. Murthy
- Rajesh Prakash
- A. K. Shukla
- A. K. Bhatnagar
- H. N. Srivastava
- CH. V. V. S. Murthy
- B. Sengupta
- Rameshwar Bali
- B. P. Shukla
- V. V. S. Gurunadharao
- Rajesh Srivatstava
- R. N. Tiwari
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Singh, R. K.
- Interpretation of Aeromagnetic Data of Panna and Adjoining Area, Parts of M.P. & U.P., for Evaluation of Structural Patterns Favourable for Emplacement of Kimberlite Clan of Rocks and Estimation of Depths of Magnetic Bodies
Abstract Views :160 |
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Authors
Affiliations
1 Geological Survey of India, GMC Division, AMSE Wing, Vasudha Bhavan, Kumaraswamy layout, Bangalore - 560 078, IN
1 Geological Survey of India, GMC Division, AMSE Wing, Vasudha Bhavan, Kumaraswamy layout, Bangalore - 560 078, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 69, No Spl Iss 3 (2007), Pagination: 653-663Abstract
The rocks of Vindhyan Supergroup overlying Bundelkhand Granites host the diamondiferous Kimberlite diatremes in Kaimur Group and diamondiferous conglomerates within the Rewa Group. This region, collectively referred as the 'Panna Diamond Belt' was flown by the Geological Survey of India aircraft during the years 2001-2002 and the aeromagnetic data generated are interpreted here. The survey was carried out at an altitude of 150 m above ground level with traverse spacing of 500 m.
The International Geomagnetic Reference Field (IGRF) corrected aeromagnetic data was brought to a plane at 600 m above msl and was subjected to terrain correction. Interpretation of this area yielded several structural trends in NE-SW, ENE-WSW, nearly E-W, nearly N-S and NW-SE directions in the form of magnetic discontinuities and linears, which are indicative of structural patterns like formational contacts/faults/fractures and body axes. The study area is characterized by a strong magnetic linear feature trending in ENE-WSW direction with intersections in nearly N-S direction representing transverse faults at some places and also intersected by two prominent features on either side, one around Majhagaon and the other towards north of Usrar. This prominent ENE-WSW trending magnetic feature is seen to fall along the contact of Vindhyan Supergroup with the adjacent Bundelkhand Granite Complex (BGC) and strong magnetic closures along this feature represent the intrusive activity at depth. In the northern part of the area occupied by BGC. Prominent magnetic features are obtained in the direction of NE-SW and few in N-S and E-W directions represent the fracture system.
The quantitative interpretation of aeromagnetic data employing radial power spectrum, matched filtering, 2-D, 3-D and contact modeling indicated the depths of causative sources. The radial power spectrum indicated three magnetic interfaces at 380 m, 1.3 km and 5.3 km from the plane of observation. The results of 2-D modeling of terrain corrected aeromagnetic data along Panna Diamond Belt yielded the depth range of 410 m-690 m from the observation plane correlatable with the interface at 380 m. The matched filtered map of second layer indicated the continuation of these magnetic bodies. The results of 3-D prism modeling of Reduced to Pole (RTP) data along Panna Diamond Belt indicated the depths in the range of 0.9 km-1.7 km from the observation plane, which is correlatable with the interface at 1.3 km. The matched filtered map of deep layer indicated that all the magnetic closures along Panna Diamond belt disappeared except a huge magnetic closure around Majhagaon-Hinota area. This appears to be a deep intrusive body and manifested in the form of different magnetic bodies at shallower depths. The depths of major NE-SW trending magnetic features in the northern part over BGC are of deeper nature. A few potential blocks were identified for search of possible emplacement of Kimberlite Clan of Rocks (KCRs).
Keywords
Aeromagnetic, Kimberlite, Panna.
- Kimberlite Pipe in Lattavaram Area (A.P.) by Detailed Geopbysical Surveys: A Case History
Abstract Views :193 |
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Authors
Affiliations
1 Geological Survey of India, Bandlaguda Complex, Hyderabad 500660, IN
1 Geological Survey of India, Bandlaguda Complex, Hyderabad 500660, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 40, No 3 (1992), Pagination: 279-286Abstract
Detailed magnetic (V. F.) and electrical resistivity surveys led to the discovery of one more hidden kimberlite pipe (P8) of dimensions 110 x 55m to the northeast of the known pipe P4 in Lattavaram area, Anantapur district, Andhra Pradesh. Detailed geophysical surveys can profitably be used for the location of hidden kimberlite bodies, in selected areas.Keywords
Geophysical Surveys, kimberlites, Lattavaram, Andhra Pradesh.- Petrology Geochemistry of the Late Archaean Siliceous High-Magnesian Basalts (SHMB) from Kaklur, Southern Bastar Craton, Central India
Abstract Views :210 |
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Authors
Affiliations
1 Department of Geology, Banaras Hindu University, Varanasi 221005, IN
1 Department of Geology, Banaras Hindu University, Varanasi 221005, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 53, No 6 (1999), Pagination: 693-704Abstract
Greenschist facies rnetabasalts showing relict spinifex texture, associated with the Late Archaean Bengpal Group, are well exposed in the Kaklur area, Bastar craton. They are classified as siliceous high-magnesian basalts (SHMB) on the basis of its distinct chemistry, such as high SiO2 (52.83-54.52 wt%), high MgO (11.40-18.35 wt%), high Cr, Ni, enriched Rb and K, depleted Nb and Ti, and enriched-LREE patterns, as well as the presence of spinifex texture. Low Al2O3/TiO2 and Sc/Y ratios, high Ti/Zr and Sr/Nd ratios less than chondrite corroborate SHMB nature of these basalts and clearly distinguishes them from komatiites/lcomatiitic basalts and boninites. They show close geochemical similarities, particularly in high field strength and rare earth element concentrations, with other well studied Western Australian SHMB. Such SHMB are reported in literature to be derived either from komatiitic magma by crustal contamination though assimilation-fractional crystallization (AFC) processes or from magma generated from the refractory continental lithosphere.Keywords
Geochemistry, Late Archaean, High-Mg Basalt, Bastar Craton, Madhya Pradesh.- Contrasting Precambrian Mafic Dykes of the Bastar Craton, Central India: Petrological and Geochemical Characteristics
Abstract Views :256 |
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Authors
Affiliations
1 Department of Geology, University of Portsmouth, Portsmouth POI 3QL, GB
2 Department of Geology, Banaras Hindu University, Varanasi - 221 005, IN
1 Department of Geology, University of Portsmouth, Portsmouth POI 3QL, GB
2 Department of Geology, Banaras Hindu University, Varanasi - 221 005, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 48, No 5 (1996), Pagination: 537-546Abstract
Numerous mafic dykes occur within the Archacan-granite-gneisses of the Bastar (Bhandara) craton of central India. Width of these dykes varies from about 20 to 200 metres and are 1 to 20 kilometers long. The dykes trend mainly NW-SE, following the foliation of the granite gneiss and major regional structural trend. They mainly comprise two different types, one, amphibolitic and the other doleritic. The amphibolite dykes have a granoblastic texture whereas the unaltered dolerite dykes are ophitic or sub-ophitic. All of the dykes are sub-alkaline Fe-rich tholeiites. However, variations in the incompatible elements such as Nb, P, Ti, Zr, Y and the light rare earth elements (LREE), suggest that the Bastar dykes infact comprise two different sets. The amphibolite dykes were derived from an earlier relatively high-Mg, low-Ti olivine tholeiite magma. These dykes have high field strength element (HFSE) values only around six times higher than those of primordial mantle. In contrast, the doleritic dykes have fractionated HFSE levels 10 to 30 times higher than primitive mantle values; they are also characterised by a marked negative Sr anomaly not present in the older dykes. One subset of amphibolitic dykes corresponds geochemically to the predominantly doleritic swarm. These latcr dykes are derived from a low-Mg, high-Ti quartz-tholeiitic magma. The two different Bastar dyke sets are recognized here as the older, BD1 amphibolitic dykes and younger, BD2 doleritic dykes. Age constraints for these dykes are set by the ages of the enveloping host gneisses and discordant granitoids and hence they are placed at or near the end-Archaean.Keywords
Petrology, Mafic Dykes, Precambrian, Bastar Craton, Central India.- Study of Structural Pattern through Aeromagnetic Data for Mineral Prospecting and Kimberlite Clan Rocks in an Area around Mahbubnagar, A.P.
Abstract Views :201 |
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Authors
Rajendra Sharma
1,
Ch. V. V. S. Murthy
1,
V. P. Mishra
1,
B. V. Nagaraju
1,
H. C. Gouda
1,
R. K. Singh
1
Affiliations
1 Geological Survey of India, GMC Division, AMSE Wing, Vasudha Bhavan, Kumaraswamy Layout, Bangalore - 560 078, IN
1 Geological Survey of India, GMC Division, AMSE Wing, Vasudha Bhavan, Kumaraswamy Layout, Bangalore - 560 078, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 72, No 2 (2008), Pagination: 175-189Abstract
The qualitative interpretation of aeromagnetic map of an area around Mahbubnagar, indicated several linears and discontinuities, which suggest the presence of various magnetic bodies and fractures, faults, and shears. The magnetic discontinuities trend in NW-SE, WNW-ESE, NE-SW, N-S and E-W directions. The quantitative interpretation indicated three magnetic interfaces at the depths of 4.5 km, 1.3 km and 670 m from the plane of observation at 675 m above m.s.l. The magnetic maps of different layers prepared by matched filtering have helped in understanding the structural setup. The study of these maps has indicated that major discontinuities (fractures/faults) extend to greater depths. The 2-D modelling revealed the dips of the bodies varying between 3°-27° indicating the near horizontal type of sources excepting the one with 69° dip. The depths to the top of these bodies were found to vary between 308 m-1180 m from the plane of observation. The 3-D prism modelling of selected anomalies indicated that most of them are near horizontal type of sources except a few. The depths to the top of these prism bodies vary between 440 m- 831 m and to the bottom between 682 m-7136 m from the plane of observation. This shows that majority of the magnetic bodies are emplaced in the surficial and shallow layers and few extend to greater depths. Based on this study, 15 blocks were identified as potential areas for mineral prospecting and also for possible emplacement of Kimberlite clan rocks (KCR).Keywords
Aeromagnetic, Mineral Prospecting, Mahbubnagar, Andhra Pradesh.- Structural Study through Aeromagnetic Data for Mineral Prospecting in Betul-Chhindwara Area, M. P.
Abstract Views :189 |
PDF Views:3
Authors
Rajendra Sharma
1,
Ch. V. VS. Murthy
1,
V. P. Mishra
1,
B. V. Nagaraju
1,
H. C. Gouda
1,
R. K. Singh
1
Affiliations
1 Geological Survey of India, GMC Division, AMSE Wing, Vasudha Bhavan, Kumaraswamy Layout, Bangalore - 560 078, IN
1 Geological Survey of India, GMC Division, AMSE Wing, Vasudha Bhavan, Kumaraswamy Layout, Bangalore - 560 078, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 71, No 6 (2008), Pagination: 815-826Abstract
The aeromagnetic map of Betul-Chhindwara area, contains two magnetic domains namely 'A' representing high amplitude anomalies falling over Deccan Traps and domain 'B' represented by moderate amplitude anomalies falling over gneiss and Gondwana Supergroup. The qualitative interpretation of aeromagnetic data has brought out several linears and discontinuities, which show the presence of various magnetic bodies and fractures/faults/shears/contacts respectively. The magnetic linears were found to trend mainly in ENE-WSW direction and few in E-W, NE-SW and NW-SE directions. The prominent magnetic discontinuities trending in ENE-WSW directions were found to be intersected by NW-SE, NE-SW and nearly N-S trending discontinuities at places. One of these prominent discontinuities was found to fall along granitic gneiss and others at the contact of gniesses with Gondwana Supergroup in northern part and with Deccan Traps in southern part. One prominent discontinuity was found within Gondwana Supergroup in the northern part and another in the southeastern part over the known Gavilgarh fault. The magnetic discontinuity obtained in the gneissic complex was found to fall over the known sulphide mineralisation near Banaskhapa-Piparia etc. and thus assumes importance for prospecting sulphide minerals all along the discontinuity.The quantitative interpretation was carried out by computing the radial power spectrum and by 2-D modelling of selected anomalies. The Radial power spectrum yielded two interfaces at the depths of 0 871 km and 9 461 km from observation plane (1080 m above msl). The shallow layer map is similar to that of the terrain corrected map whereas the deep layer map indicated the gradients corroborating with the discontinuities mentioned above excepting the one falling over granitic gneiss which was reflected as a broad elongated magnetic low. The results of 2-D modelling over ten selected anomalies suggest that most of the bodies are very shallow excepting two The dips of most of the bodies were found m between 6°-25° and few between 32°- 48°.
Keywords
Aeromagnetic, Mineral Prospecting, Betul, Madhya Pradesh.- Seismicity Pattern Preceding Great Muzaffarabad Earthquake of 8th October 2005
Abstract Views :169 |
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Authors
Affiliations
1 India Meteorological Department, New Delhi - 110 003, IN
2 128, Pocket-A, Sarita Vihar, New Delhi - 110 044, IN
1 India Meteorological Department, New Delhi - 110 003, IN
2 128, Pocket-A, Sarita Vihar, New Delhi - 110 044, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 71, No 3 (2008), Pagination: 388-396Abstract
Seismicity pattern has been examined prior to the occurrence of the six earthquakes (M ≥ 54) during the period 1965 to 2005. This includes the damaging earthquake of Gilgit 1972 Pattan 1974 and Muzaffarabad earthquake 2005. The results were interpreted with reference to (i) pattern of occurrence of past earthquakes (ii) energy released event wise and cumulative energy released year wise. It was interesting to note that all these earthquakes were preceded by quiescence followed by increase in seismicity before the occurrence of main earthquake. An alternative interpretation of the data prior to the occurrence of the great Muzaffarabad earthquake (October 2005) suggested a sequence of double quiescence as reported in Uttarkashi (1991) and Chamoli (1999) earthquakes in Uttaranchal. The focal mechanism solution of an earthquake during February 2004 and October 2005 revealed significant changes in the orientation of P and T axis. It was interesting to find that the value of 'b' in Gutenberg-Richter frequency magnitude relationship decreased markedly during 1985-1994 and almost recovered prior to the occurrence of Great Muzaffarabad earthquake m accordance with the Dilantancy Diffusion model of earthquakes.Keywords
Seismicity Pattern, Muzaffarabad Earthquake, B-value.- Analysis of Aeromagnetic Data Over Part of Bundelkhand Granite Complex for Geology and Structure
Abstract Views :176 |
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Authors
Affiliations
1 AMSE Wing, Geological Survey of India, Vasudha Bhavan, Kumaraswamy Layout, Bangalore - 560 078, IN
1 AMSE Wing, Geological Survey of India, Vasudha Bhavan, Kumaraswamy Layout, Bangalore - 560 078, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 68, No 6 (2006), Pagination: 949-958Abstract
The interpretation of aeromagnetic data over Bundelkhand Granite Complex (BGC) in parts of Lalitpur District (U P), Sagar and Chhatarpur Districts (M P) has revealed the structural patterns such as the boundaries of various geological formations, magnetic body axes, depth extents of intrusives and thickness of various litho-Units which may be of help in mineral exploration. The aeromagnetic features were found to correspond well with various geological formations like Bijawars, Vindhyans, Deccan Traps and BGC. The average depths of magnetic interfaces were estimated to be at 71 km, 19 km and 0 47 km from the observation plane (625 m above m s 1). The thickness of Deccan Traps was estimated to be of the order of 0 47 km from the plane of observation. The ferrugenous bodies in Bijawars and intrusive bodies in BGC were found to disappear at the magnetic interface at 19 km from the observation plane. The Bijawars were found to be thickened gradually towards west of Didonia up to the deeper interface at 71 km from observation plane probably due to the presence of schistose rocks and basic/Ultrabasic intrusives at depth. The study of matched filtered maps indicated that Vindhyans continue beyond the interface of 19 km at places. The 3-D prism modeling results indicated that the depth extents of most of the bodies are found to be in-Between the two interfaces at 0 47 km and 1 9 km and some bodies continued even deeper. The area towards north and northeast of Sonrai has been recommended as having potential for base-Metal mineral prospecting.Keywords
Aeromagnetics, Bundelkhand Granite Complex, Geology, Structure, Lalitpur (U P), Chhatarpur (M P).- Identification and Mapping of Chromium (VI) Plume in Groundwater for Remediation: A Case Study at Kanpur, Uttar Pradesh
Abstract Views :204 |
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Authors
R. K. Singh
1,
B. Sengupta
1,
Rameshwar Bali
2,
B. P. Shukla
1,
V. V. S. Gurunadharao
3,
Rajesh Srivatstava
4
Affiliations
1 Central Pollution Control Board, Ministry of Environment and Forests, Govt. of India, IN
2 Centre of Advanced Study in Geology, University of Lucknow, Lucknow, IN
3 National Geophysical Research Institute (CSIR), Hyderabad, IN
4 Department of Civil Engineering, Indian Institute of Technology, Kanpur, IN
1 Central Pollution Control Board, Ministry of Environment and Forests, Govt. of India, IN
2 Centre of Advanced Study in Geology, University of Lucknow, Lucknow, IN
3 National Geophysical Research Institute (CSIR), Hyderabad, IN
4 Department of Civil Engineering, Indian Institute of Technology, Kanpur, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 74, No 1 (2009), Pagination: 49-57Abstract
With only twenty five percent population living in urban areas, India has cities amongst the biggest in the world. Urban growth in most of Indian cities is concomitant with rise in water demand for community, as well as, for industrial purposes. The complex situation resulting from indiscriminate disposal of waste and its severe impact on groundwater quality is set for continuous worsening mainly for want of sustained effort aimed at site-specific remediation.
The study, a prerequisite for actual remediation in an industrial city of Kanpur, India, envisages detailed investigation about pollutant transport, evaluation of concept of Bio-remediation and a range of other options and finally full scale implementation of the best suited. Drilling of piezometers and resistivity survey indicates that the area is constituted of alluvial sands, gravels and their various admixtures. Chemical analysis of water samples collected from piezometers and hand pumps shows the presence of hexavalent chromium rich horizons at various depths. The alarming concentration of this carcinogenic heavy metal of the order of 16.3 mg/l against the permissible concentration (of 0.05 mg/l) for drinking water and high concentration within sediments of the area poses a major threat to the entire ecosystem. The projection of migration contaminant plume of hexavalent chromium as depicted in the paper is indicative of a concentrated extent of core zone existing in shallow alluvial aquifer, which may be targeted for interception by remedial measures.
The present work, elaborating on the source, potential and monitoring the migration of the pollutant plume is the first field scale study of its kind in the country. The findings of these studies are of strong relevance in addressing the ground water pollution due to indiscriminate disposal practices of hazardous waste in areas located within the alluvial zones.
Keywords
Groundwater, Hexavalent Chromium, Pollutant Transport, Kanpur, Uttar Pradesh.References
- ANSARI, A.A., SINGH, I.B. and TOBSCHALL, H.J. (1999) Status of anthropogenically induced metal pollution in the Kanpur Unnao industrial region of the Ganga plain, India. Environmental Geol., v.38(1), pp.25-33.
- BEAR, J. (1972) Dynamics of fluids in porous media. New York, 764p.
- CENTRAL GROUND WATER BOARD, LUCKNOW (2000) Groundwater Pollution Studies in Unnao-Kanpur Industrial Areas, Uttar Pradesh, pp.21.
- CENTRAL GROUND WATER BOARD (CGWB), NEW DELHI (2001) Groundwater for everyone, 1p.
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- CENTRAL POLLUTION CONTROL BOARD (CPCB), INDIA (1997) Report on Groundwater quality in Kanpur, status sources and control measures no.GWQS/8/1996-97, 33p.
- CLESCERI, L.S., GREENBERG, ARNOLD, E. and Trussel, R.R. (1989) Standard Methods for the examination of water and wastewater, 17th edition, APHA-AWWA-WPCF. American Public Health Association, Washington D.C., 1470p.
- GROUNDWATER DEPARTMENT, UTTARPRADESH (1994) Report on Technical Feasibility of Groundwater Development in various blocks of District Kanpur, India, 11p.
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- SINGH, M., ANSARI, A.A., MULLER, G. and SINGH, I.B. (1997) Heavy metals in freshly deposited sediments of the Gomti river (atributary of Ganga river: effects of human activity. Environmental Geol., v.29(3/4) pp.246-252.
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- Sectoral Zoning in Natural Fluorites from Carbonatite Rocks of Ambadongar, Gujarat
Abstract Views :234 |
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Authors
R. K. Singh
1,
R. N. Tiwari
1
Affiliations
1 Department of Geology, Government Science College, Rewa - 486 001, IN
1 Department of Geology, Government Science College, Rewa - 486 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 76, No 3 (2010), Pagination: 244-246Abstract
In this article, we want to examine the presence of various types of zoning and spatial distribution of luminescence activating trace elements including REEs in natural fluorites from carbonatite rocks of Ambadongar, Gujarat. At Ambadongar, fluorite occurs as veins and vugs in different colours e.g. blue, yellow, green and purple associated with carbonatite and alkaline rocks. Cathodoluminescence microscopy was used to study the internal morphology including growth sectors, growth bands and concentric zoning patterns in fluorite crystals.Keywords
Fluorites, Zoning, Carbonatite, Ambadongar, Gujarat.- EPR Study of Yellow and Colourless Fluorite from Carbonatite Rocks of Ambadongar, Gujarat
Abstract Views :161 |
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Authors
Affiliations
1 Department of Geology, Govt. Science College, Rewa C-6/142 Second Floor, Sector-5 Rohini, Delhi - 110 085, IN
1 Department of Geology, Govt. Science College, Rewa C-6/142 Second Floor, Sector-5 Rohini, Delhi - 110 085, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 77, No 4 (2011), Pagination: 381-384Abstract
No Abstract.- Structural Study of Meghalaya Plateau Through Aeromagnetic Data
Abstract Views :209 |
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Authors
Affiliations
1 RSAS, Geological Survey of India, Vasudha Bhavan, K.S. Layout, Bangalore – 560 078, IN
1 RSAS, Geological Survey of India, Vasudha Bhavan, K.S. Layout, Bangalore – 560 078, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 79, No 1 (2012), Pagination: 11-29Abstract
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.References
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- 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.
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- 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.
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