Existence of a sedimentary graben in the western part of Narmada Zone: seismic evidence

Sridhar, Alpa; Tewari, H. C.

doi:10.1016/s0264-3707(00)00013-2

Cited by 29 publications

(21 citation statements)

References 10 publications

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“…The Narmada and Tapti Rivers flow in these rift valleys. For completeness of the work a brief description of the crustal structure and P -wave velocity distribution along the ThuadaraSindad profile, given by Sridhar (2001); Sridhar and Tewari (2001); and Tewari and Kumar (2003) is presented in the next section.…”

Section: Geology and Tectonic Frame Workmentioning

confidence: 99%

“…Several geological and geophysical studies have been carried out to understand the evolution of NSL and its influence on tectonic framework of central India. These studies include four Deep Seismic Sounding (DSS) profiles namely (I) HirapurMandla, (II) Khajuriakalan-Pulgaon, (III) UjjainMahan, and (IV) Thuadara-Sindad (Kumar et al 2000;Tewari et al 2001;Sridhar and Tewari 2001;Kumar 2002;Mall et al 2002). Locations of these profiles are shown in figure 1.…”

Section: Introductionmentioning

confidence: 99%

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2-D Crustal thermal structure along Thuadara-Sindad DSS profile across Narmada-Son lineament, central India

Thiagarajan

2007

J Earth Syst Sci

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Central India is traversed by a WSW-ENE trending Narmada-Son lineament (NSL) which is characterized by the presence of numerous hot springs, feeder dykes for Deccan Traps and seismicity all along its length. It is divided in two parts by the Barwani-Sukta Fault (BSF). To the west of this fault a graben exists, whereas to the east the basement is uplifted between Narmada North Fault (NNF) and Narmada South Fault (NSF). The present work deals with the 2-D thermal modeling to delineate the crustal thermal structure of the western part of NSL region along the Thuadara-Sindad Deep Seismic Sounding (DSS) profile which runs almost in the N-S direction across the NSL. Numerical results of the model reveal that the conductive surface heat flow value in the region under consideration varies between 45 and 47 mW/m 2 . Out of which 23 mW/m 2 is the contribution from the mantle heat flow and the remaining from within the crust. The Curie depth is found to vary between 46 and 47 km and is in close agreement with the earlier reported Curie depth estimated from the analysis of MAGSAT data. The Moho temperature varies between 470 and 500 • C. This study suggests that this western part of central Indian region is characterized by low mantle heat flow which in turn makes the lower crust brittle and amenable to the occurrence of deep focused earthquakes such as Satpura (1938) earthquake.

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Section: Geology and Tectonic Frame Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

2-D Crustal thermal structure along Thuadara-Sindad DSS profile across Narmada-Son lineament, central India

Thiagarajan

2007

J Earth Syst Sci

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“…The basement depth tends to become shallow towards southeast. Deep seismic sounding (DSS) studies across Narmada-Son lineament mapped Deccan Trap thickness and inferred subtrappean sediments in the Narmada-Tapti region(KAILA, 1988;SRIDHAR and TEWARI, 2001). The present study area falls in between the two DSS profiles along MehmadabadBillimora in the west and Thuadara-Sindad towards the east.…”

mentioning

confidence: 80%

“…The results of the seismic profile in the west along the Mehmadabad-Billimora show about 1-km thick Deccan Trap south of Narmada and reveal about 1-km thick Mesozoic sediments below the Deccan Trap. Along the Thuadara-Sindad profile in the east, Deccan Trap is found to be an average 900 m thick and south of Sendhwa up to the Tapti River, the thickness of Mesozoic sediments is around 1.9 km(KAILA, 1988) SRIDHAR and TEWARI (2001). in their reinterpreted seismic results along the Thuadara-Sindad profile delineate a graben between the rivers Narmada and Tapti.…”

mentioning

confidence: 95%

Delineation of Subtrappean Mesozoic Sediments in Deccan Syneclise, India, Using Travel-Time Inversion of Seismic Refraction and Wide-Angle Reflection Data

Murty

Prasad

Rao

et al. 2010

Pure Appl. Geophys.

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2-D shallow velocity structure is derived by traveltime inversion of the first arrival seismic refraction and wide-angle reflection data along the E-W trending Narayanpur-Nandurbar and N-S Kothar-Sakri profiles, located in the Narmada-Tapti region of the Deccan syneclise. Deccan volcanic (Trap) rocks are exposed along the two profiles. Inversion of seismic data reveals two layered velocity structures above the basement along the two profiles. The first layer with a P-wave velocity of 5.15-5.25 km s -1 and thickness varying from 0.7-1.5 km represents the Deccan Trap formation along the Narayanpur-Nandurbar profile. The Trap layer velocity ranges from 4.5 to 5.20 km s -1 and the thickness varies from 0.95 to 1.5 km along the Kothar-Sakri profile. The second layer represents the low velocity Mesozoic sediments with a P-wave velocity of 3.5 km s -1 and thickness ranging from about 0.70 to 1.6 km and 0.55 to 1.1 km along the E-W and N-S profiles, respectively. Presence of a low-velocity zone (LVZ) below the volcanic rocks in the study area is inferred from the travel-time 'skip' and amplitude decay of the first arrival refraction data together with the prominent wide-angle reflection phase immediately after the first arrivals from the Deccan Trap formation. The basement with a P-wave velocity of 5.8-6.05 km s -1 lies at a depth ranging from 1.5 to 2.45 km along the profiles. The velocity models of the profiles are similar to each other at the intersection point. The results indicate the existence of a Mesozoic basin in the Narmada-Tapti region of the Deccan syneclise.

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“…Pleistocene sedimentary terraces in SNF zone are tilted 20-25 ∘ in the tract Hardi-Jabalpur and are also displaced 10-15 m near Navagram [15]. The seismic structure and existence of sedimentary basin of SONATA zone is interpreted by Murty et al [16] and Kumar et al [17] using 2D crustal seismic velocity models and 2D gravity modeling by Mishra, [18], Verma and Banerjee [19], Sridhar and Tewari, [20] and Mishra et al [21]. The high Bouguer gravity anomaly between Jabalpur and Mandla suggests localized uplift of SNSF and the presence of a magmatic body at different depths.…”

Section: Introductionmentioning

confidence: 99%

Tectonic Control on Drainage Network Evolution in the Upper Narmada Valley: Implication to Neotectonics

Kothyari

Rastogi

2013

Geography Journal

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Convergence of the Indian plate towards Eurasia is reflected in neotectonics along several zones throughout the Indian plate. Neotectonics of the upper Narmada river basin following one of the active Son-Narmada Fault (SNF central part) zones in central Peninsular India has been studied through tectonic geomorphometric parameters. The study area is 175 km wide and 400 km long valley and catchment area of upper Narmada river basin in Madhya Pradesh state. High resolution ASTER data indicates neotectonic features like sudden changes in drop of Narmada river floor at two locations around Jabalpur formed by conjugate normal faults. Cross profiles indicate uplift of the entire area by a few hundred meters south of the Son-Narmada south fault. Basin asymmetry parameter indicates northward shifting of the river course from middle of the basin due to uplift of the southern block.

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Existence of a sedimentary graben in the western part of Narmada Zone: seismic evidence

Cited by 29 publications

References 10 publications

2-D Crustal thermal structure along Thuadara-Sindad DSS profile across Narmada-Son lineament, central India

2-D Crustal thermal structure along Thuadara-Sindad DSS profile across Narmada-Son lineament, central India

Delineation of Subtrappean Mesozoic Sediments in Deccan Syneclise, India, Using Travel-Time Inversion of Seismic Refraction and Wide-Angle Reflection Data

Tectonic Control on Drainage Network Evolution in the Upper Narmada Valley: Implication to Neotectonics

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