Crust and shallow mantle structure of south India by inverting interpolated receiver function with surface wave dispersion

Estimation of Moho Depth Beneath Southern Indian Shield by Inverting Gravity Anomalies Constrained by Seismic Data

“…This observation is in line with the previous studies based on seismic and gravity methods (Das et al, 2019;N. Kumar et al, 2014) and is interpreted as the resultant of Protero- zoic crustal collision along the MBCS during the Neoproterozoic thermal event (Das et al, 2019) or either due to the lack of deformation or due to the preservation of ancient crust (Gupta et al, 2003). In addition, similar crustal thickness values of 44-47 km are also noted south of Salem block into Madurai block till AKSZ, suggesting the possible continuation of the Achaean crust south of Palghat-Cauvery Shearzone System (PCSS).…”

“…There are substantial variations between individual tectonic units. Previous geophysical studies reported similar estimates of the average crustal thickness (Bhattacharya, 1974;Borah et al, 2014;Das et al, 2019;Gupta et al, 2003;Kaila et al, 1981;Kiselev et al, 2008;Singh et al, 2015;Tiwari et al, 2006) using different geophysical techniques.…”

“…During the last two decades, numerous geophysical studies have been carried out to determine the Moho beneath Southern Peninsular India. In particular, deep seismic sounding profiles (Kaila et al., 1979; Mandal et al., 2018; V. V. Rao & Prasad, 2006; Reddy et al., 2003; Vijaya Rao et al., 2015), receiver function analysis (Borah et al., 2014; Das & Rai, 2017; Das et al., 2015, 2019; Gupta et al., 2003; Julia et al., 2009; Kiselev et al., 2008; Rai et al., 2013; P. Rao & Kumar, 2022; Saikia et al., 2017), magnetotelluric studies (Abdul Azeez et al., 2015; Gokarn et al., 2004; Malleswari et al., 2019), and gravity studies (N. Kumar et al., 2014; Radhakrishna et al., 2003; Sunil et al., 2010). However, there are minimal geophysical studies that use joint geophysical investigations.…”

“…However, there are minimal geophysical studies that use joint geophysical investigations. 3D shear wave velocity structure from the joint inversion of surface wave dispersion and receiver function (Das et al., 2019) and 3D density structure from joint inversion of gravity, geoid, and topography data (N. Kumar et al., 2014) are a few examples of joint geophysical studies. Studies have yet to be performed in southern India to get a refined 3D architecture of Moho undulation from gravity anomalies by implementing seismic constraints.…”

“…In particular, deep seismic sounding profiles (Kaila et al, 1979;Mandal et al, 2018;V. V. Rao & Prasad, 2006;Reddy et al, 2003;Vijaya Rao et al, 2015), receiver function analysis (Borah et al, 2014;Das et al, 2015Das et al, , 2019Gupta et al, 2003;Julia et al, 2009;Kiselev et al, 2008;Rai et al, 2013;P. Rao & Kumar, 2022;Saikia et al, 2017), magnetotelluric studies (Abdul Azeez et al, 2015;Gokarn et al, 2004;Malleswari et al, 2019), and gravity studies (N. Kumar et al, 2014;Radhakrishna et al, 2003;Sunil et al, 2010).…”