The Cauvery Suture Zone: Map of Structural Architecture and Recent Advances

Chetty, T.R.K.

doi:10.1007/s12594-015-0192-9

Cited by 14 publications

(5 citation statements)

References 38 publications

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“…However, in the NW part, the gradient maxima(s) are not prominent. Chetty (2015) inferred dominance of NE–SW trending S1 fabrics in the southern part of CNSZ and the structural fabric derived from horizontal gradient of gravity data is in strong corroboration with the geological inferences.…”

Section: Resultssupporting

confidence: 62%

“…The general trend varies from NE-SW to ENE-WSE. However, in the NW part, the gradient maxima(s) are not prominent Chetty (2015). inferred dominance of NE-SW trending S1 fabrics in the southern part of CNSZ and the structural fabric derived from horizontal gradient of gravity data is in strong corroboration with the geological inferences.To derive horizontal gradient of magnetic data, first, we have transformed the magnetic anomaly in the gravity domain (pseudo-…”

supporting

confidence: 64%

“…Black dot represents gravitymagnetic stations. Shear Zones marked after Chetty (2015) are Chennimalai Noyil Shear Zone (CNSZ); Dharapuram Shear Zone(DSZ); Devattur-Kallimandayam Shear Zone (DKSZ). A-A 0 , B-B 0 , C-C 0 , and D-D 0 .…”

Section: Processing Of Gravity and Magnetic Datamentioning

confidence: 99%

“…The Quaternary formations include kankar, soil, and alluvium. The PCSZ (Figure 1) is represented by an anastomosing network of shear zones broadly trending in an east–west fashion (Chetty, 2015; Chetty et al, 2016). The portion of the PCSZ, which traverses across the study area is known as Chennimalai Noyil Shear Zone (CNSZ), which varies in width from ~1 to 10 km.…”

Section: Geological Settingmentioning

confidence: 99%

“…The portion of the PCSZ, which traverses across the study area is known as Chennimalai Noyil Shear Zone (CNSZ), which varies in width from ~1 to 10 km. The other prominent shear zones are Dharapuram Shear Zone (DSZ), Devattur Kallimandayam Shear Zone (DKSZ) and Karur‐Oddanchatram Shear Zone (KOSZ), which show NE‐SW trend and merge with the PCSZ further east (Chetty, 2015).…”

Section: Geological Settingmentioning

confidence: 99%

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

et al. 2020

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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.

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Section: Resultssupporting

confidence: 62%

supporting

confidence: 64%

Section: Processing Of Gravity and Magnetic Datamentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

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