The evolution of the Vindhyan basin vis-à-vis the Narmada-Son lineament, central India, from deep seismic soundings

Kaila, K. L.; Murty, P.R.K.; Mall, D. M.

doi:10.1016/0040-1951(89)90249-7

Cited by 91 publications

(72 citation statements)

References 20 publications

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“…KAILA et al (1987), presented a two-dimensional preliminary model for this area, based on travel-time data modeling of only two shot points SP 40 and SP 235. KAILA et al (1989) presented results based on two-dimensional velocity modeling of six major shot points, 0, 40, 80, 120, 160 and 235. Their crustal model consists of a 6.5 km s )1 velocity layer in the upper crust ( 8-18-km depth), a 6.7 km s )1 velocity mid crustal layer (18-32-km depth) and a 6.5 km s )1 low velocity in the lower crust (32-44-km depth).…”

Section: Discussionmentioning

confidence: 99%

“…In crustal seismic studies a velocity of 6.5-6.7 km s )1 normally indicates the presence of middle or lower crustal rocks. If the velocity of 6.5-6.7 km s )1 is considered as representing the lower crust, as has been suggested by earlier researchers (KAILA et al, 1989), it would indicate an almost non-existent or very thin upper crust and a very thick lower crust (about 35 km). Such a crustal structure has not been observed elsewhere in the Indian shield.…”

Section: Salient Features Of the Crustal Structurementioning

confidence: 99%

“…1) in 1984. Results based upon the interpretation of part of these analog data along the profile were published in various research journals (KAILA et al, 1987(KAILA et al, , 1989. These results were based on the modeling of travel-time data only.…”

Section: Introductionmentioning

confidence: 99%

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2-D Crustal Velocity Structure Along Hirapur-Mandla Profile in Central India: An Update

Murty

Tewari

Reddy

2004

Pure and Applied Geophysics

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The 2-D crustal velocity model along the Hirapur-Mandla DSS profile across the Narmada-Son lineament in central India (MURTY et al., 1998) has been updated based on the analysis of some short and discontinuous seismic wide-angle reflection phases. Three layers, with seismic velocities of 6.5-6.7, 6.35-6.40 and 6.8 km s )1 , and upper boundaries located approximately at 8, 17 and 22 km depth respectively, have been identified between the basement (velocity 5.9 km s )1 ) and the uppermost mantle (velocity 7.8 km s )1 ). The layer with 6.5-6.7 km s )1 velocity is thin and is less than 2-km deep between the Narmada north (at Katangi) and south (at Jabalpur) faults. The upper crust shows a horst feature between these faults, which indicates that the Narmada zone acts as a ridge between two pockets of mafic intrusion in the upper crust. The Moho boundary, at 40-44 km depth and the intra-crustal layers exhibit an upwarp suggesting that the Narmada faults have deep origins, involving deep-seated tectonics. A smaller intrusive thickness between the Narmada faults, as compared to those beyond these faults, suggests that the intrusive activities on the two sides are independent. This further suggests that the two Narmada faults may have been active at different geological times. The seismic model is constrained by 2-D gravity modeling. The gravity highs on either side of the Narmada zone are due to the effect of the high velocity/high density mafic intrusion at upper crustal level.

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Section: Discussionmentioning

confidence: 99%

Section: Salient Features Of the Crustal Structurementioning

confidence: 99%

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2-D Crustal Velocity Structure Along Hirapur-Mandla Profile in Central India: An Update

Murty

Tewari

Reddy

2004

Pure and Applied Geophysics

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“…The major prominent rift that separates the northern and southern peninsular blocks is the Son-Narmada rift about 1,000 km long and 50 km wide. Basement reactivation and associated block faulting took the plate several times along the Son-Narmada rift in the geological past (KAILA et al, 1989;DASGUPTA et al, 2000;KAYAL, 2000). There are two major deep-seated boundary fault systems; a northerly dipping SNNF and a southerly dipping SNSF.…”

Section: Historical Seismicity and The Seismogenic Sourcesmentioning

confidence: 99%

A New Insight into Probabilistic Seismic Hazard Analysis for Central India

Mandal

Shukla

Khan

et al. 2013

Pure Appl. Geophys.

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Abstract-The Son-Narmada-Tapti lineament and its surroundings of Central India (CI) is the second most important tectonic regime following the converging margin along HimalayasMyanmar-Andaman of the Indian sub-continent, which attracted several geoscientists to assess its seismic hazard potential. Our study area, a part of CI, is bounded between latitudes 18°-26°N and longitudes 73°-83°E, representing a stable part of Peninsular India. Past damaging moderate magnitude earthquakes as well as continuing microseismicity in the area provided enough data for seismological study. Our estimates based on regional GutenbergRichter relationship showed lower b values (i.e., between 0.68 and 0.76) from the average for the study area. The Probabilistic Seismic Hazard Analysis carried out over the area with a radius of *300 km encircling Bhopal yielded a conspicuous relationship between earthquake return period (T) and peak ground acceleration (PGA). Analyses of T and PGA shows that PGA value at bedrock varies from 0.08 to 0.15 g for 10 % (T = 475 years) and 2 % (T = 2,475 years) probabilities exceeding 50 years, respectively. We establish the empirical relationships ZPA These demonstrate that the ZPA values decrease with increasing shear wave velocity, suggesting a diagnostic indicator for designing the structures at a specific site of interest. The predictive designed response spectra generated at a site for periods up to 4.0 s at 10 and 2 % probability of exceedance of ground motion for 50 years can be used for designing duration dependent structures of variable vertical dimension. We infer that this concept of assimilating uniform hazard response spectra and predictive design at 10 and 2 % probability of exceedance in 50 years at 5 % damping at bedrocks of different categories may offer potential inputs for designing earthquake resistant structures of variable dimensions for the CI region under the National Earthquake Hazard Reduction Program for India.

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“…In the eastern and central part of the Son Narmada region, the processes of uplift and erosion of upper crustal layers have been inferred from seismic (Kaila et al, 1989;Tewari and Kumar, 2003) and magnetotelluric studies (Gokarn et al, 2001). In contrast, the more westerly region (west of Barwani; Fig.…”

Section: Introductionmentioning

confidence: 99%

Granitic and magmatic bodies in the deep crust of the Son Narmada Region, Central India: constraints from seismic, gravity and magnetotelluric methods

Naganjaneyulu

2010

Earth Planet Sp

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Magnetotelluric (MT) data at 24 locations in the Son Narmada region, Central India, were collected across the Tapti North Fault and Son Narmada Fault along the Chinchpada-Godhra profile (220 km). MT impedance tensors were then estimated in the period range 0.001-1,000 s using robust processing codes. The N70• E geo-electric strike direction was obtained by multi-site, multi-frequency analysis. The data were modeled using non-linear conjugate gradient scheme taking both apparent resistivity and phase into account. The two-dimensional MT model obtained (after static shift correction) represents resistive bodies (1,000-3,000 ohm-m) and conductive bodies (<20 ohm-m) in the deep crust. The resistive bodies in the lower crust are interpreted to be granitic intrusive complexes. The conductor on the south of Son Narmada Fault is attributed to the presence of magmatic bodies due to underplating, and the conductor on the north as due to the presence of fluids. The highly resistive (>2,000 ohm-m) upper crust is interpreted to comprise felsic rocks of granitic composition, and the low-resistive (<100 ohm-m) deep crust as being composed of dense mafic granulites. The Domal upwarp structure near Son Narmada Fault, with a thick felsic crust sandwiched between the mafic and intermediate crust, can be explained by underplated sediments/felsic crust which jacked-up the lithounits above.

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The evolution of the Vindhyan basin vis-à-vis the Narmada-Son lineament, central India, from deep seismic soundings

Cited by 91 publications

References 20 publications

2-D Crustal Velocity Structure Along Hirapur-Mandla Profile in Central India: An Update

2-D Crustal Velocity Structure Along Hirapur-Mandla Profile in Central India: An Update

A New Insight into Probabilistic Seismic Hazard Analysis for Central India

Granitic and magmatic bodies in the deep crust of the Son Narmada Region, Central India: constraints from seismic, gravity and magnetotelluric methods

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