Analysis of airborne magnetic and gravity anomalies of peninsular shield, India integrated with seismic and magnetotelluric results and gravity anomalies of Madagascar, Sri Lanka and East Antarctica

Mishra, D. C.; Kumar, Virendra; Rajasekhar, R. P.

doi:10.1016/j.gr.2005.11.014

Cited by 25 publications

(25 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In these models, moderate low resistivity zones are confined to the region near the PCSZ. Also, a remodeling of gravity data (Mishra et al, 2006) yielded a model involving three layered crust with 2.7, 2.8 and 2.9 gm/cm 3 with thicknesses around 12, 13 and 17 km, respectively without any low density layer (of 2.65 gm/cm 3 ) in the mid-crust (Fig. 5).…”

Section: Discussionmentioning

confidence: 99%

“…Another study identified a denser lower crust (2.85 gm/cm 3 ) with Moho depth ranging from 36 to 41 km (Ajayakumar et al, 2006). Excluding the earlier model by Singh et al (2003), all the other models (Radhakrishna et al, 2003;Ajayakumar et al, 2006;Mishra et al, 2006; show that the density of mid-lower crustal layers is more than about 2.75 gm/cm 3 for PCSZ and adjoining areas, suggesting relatively high density material beneath this zone.…”

Section: Gravity Studiesmentioning

confidence: 91%

“…A low density ( = 2.65 gm/cm 3 ) mid-crustal layer all along the profile is another interesting feature (figure not shown). The revised gravity model for this anomaly across PCSZ (Mishra et al, 2006) shows a high density zone (2.80 gm/cm 3 ) with more than 15 km thickness in the depth range of 10-25 km (Fig. 5).…”

Section: Gravity Studiesmentioning

confidence: 96%

“…Gravity lows can be found on either side which broadly coincide with the gravity lows near Kodaikanal as well as the Palghat to Kuppam gravity low axis discussed by Krishna Brahmam (1993). 2D gravity modeling, adopting the velocity modeling results of Reddy et al (Mishra et al, 2006). The gravity anomaly is shown in Fig.…”

Section: Gravity Studiesmentioning

confidence: 99%

“…Gravity models for the region are available from a N-S transect (Kolattur-Palani profile; Singh et al, 2003) as well as a revised gravity model (Mishra et al, 2006). We show in Fig.…”

Section: Revised Gravity Modelmentioning

confidence: 99%

See 4 more Smart Citations

The Cambrian collisional suture of Gondwana in southern India: A geophysical appraisal

Naganjaneyulu

Santosh

2010

Journal of Geodynamics

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Section: Gravity Studiesmentioning

confidence: 91%

Section: Gravity Studiesmentioning

confidence: 96%

Section: Gravity Studiesmentioning

confidence: 99%

“…Gravity models for the region are available from a N-S transect (Kolattur-Palani profile; Singh et al, 2003) as well as a revised gravity model (Mishra et al, 2006). We show in Fig.…”

Section: Revised Gravity Modelmentioning

confidence: 99%

See 3 more Smart Citations

The Cambrian collisional suture of Gondwana in southern India: A geophysical appraisal

Naganjaneyulu

Santosh

2010

Journal of Geodynamics

View full text Add to dashboard Cite

Insights into crustal architecture and tectonics across Palghat Cauvery Shear Zone, India from combined analysis of gravity and magnetic data

et al. 2020

View full text Add to dashboard Cite

The Palghat Cauvery Shear Zone (PCSZ), which dissects the Southern Granulite Terrane (SGT), evoked much attention for last two-three decades as it offers an enticing opportunity to understand Precambrian tectonics. Many studies suggest that it is a suture zone or a terrane boundary, but tectonic evolution is mainly derived from structural and geochronological evidences. The present gravity-magnetic study provides insight into both shallow and deeper crustal architecture and addresses the issues related to validation/modification of the existing tectonic realm. A total of 3,650 gravity and magnetic measurements were made covering 8,640 km 2 area, represented by high-grade metamorphic rocks and acid intrusives of Archean to Neoproterozoic age. Representative rock samples were also collected for determination of petrophysical properties (density and susceptibility) which have augmented the understanding of gravity-magnetic signature. The gravity anomaly map and subsequent modelling suggest an occurrence of a high-density batholith at mid-crustal level at the central part of the area. The magnetic anomaly map reveals that ENE-WSW trending linear magnetic low zone is coincident with a residual gravity high, which probably indicates the fossil of an oceanic crust. The horizontal gradient of gravity-magnetic data reveals the shallow crust, which is bounded by Palghat Cauvery Shear Zone (PCSZ) and Dharapuram Shear Zone (DSZ), and separates two terranes in terms of density and susceptibilities. The study suggests N-S verging compressional tectonics had led to closure of an ocean, imprints of which is well manifested in gravity and magnetic maps.

show abstract

Geochemical and Geochronological Data from Charnockites and Anorthosites from India’s Kodaikanal–Palani Massif, Southern Granulite Terrain, India

Catlos

Sayıt

Sivasubramanian³

et al. 2010

Topics in Igneous Petrology

View full text Add to dashboard Cite

Analysis of airborne magnetic and gravity anomalies of peninsular shield, India integrated with seismic and magnetotelluric results and gravity anomalies of Madagascar, Sri Lanka and East Antarctica

Cited by 25 publications

References 27 publications

The Cambrian collisional suture of Gondwana in southern India: A geophysical appraisal

The Cambrian collisional suture of Gondwana in southern India: A geophysical appraisal

Insights into crustal architecture and tectonics across Palghat Cauvery Shear Zone, India from combined analysis of gravity and magnetic data

Geochemical and Geochronological Data from Charnockites and Anorthosites from India’s Kodaikanal–Palani Massif, Southern Granulite Terrain, India

Contact Info

Product

Resources

About