... comprises 34 flows having a cumulative thickness of 431 m, resting over the overlying Precambrian basement. The flows are classified as the Amarkantak Group, which includes eight formations, namely the Mandla, Dhuma, Pipardehi, Linga, Multai, Amarwara, Khampa, and Kuleru formations in ascending...

... and the Cambay graben (Fig 1 and 2). The exposed geological sequence within the "SONATA" rift contains remnant of a period of active rifting in late Archaean - Early Proterozoic times (2600-2400 Ma.) represented by metasedimentary formations over 500 km in length and 20-25 km width-designated as Mahakoshal...

... carried out during 1981-1982. This profile is in three parts: (a) Khajuriakalan-Rahatgaon, five shot points, (b) Pagariahat-Masooda, six shot points and (c) Multai-Pulgaon profile, four shot points. For both the profiles the shot points were placed roughly at every 20 to 30 km on the profile. Details...

...-< Il. ~ Q 0.0 50.0 ~ ~ ~ Shield Region Mahanadl Della Area Dhatrigram - Bongaon East of Sonamukhi Dhatri,ram Part East of Moyna Hoolhly/Damodar River 60.0 .:l _ _ _ _ _ _ _ I Fig.4. Interval velocity-depth function for zone-2. Kaila et al. (1987a; 1992) may be referred for names of various places. Paradip profiles (Kaila et al. 1987a), the granitic basement (5.9 km/sec) lies at a depth of 1.2 km. This velocity is maintained up to 6 km depth where it jumps to 6.5 km/sec. At a depth of around 17.2 km it is underlain by a 3.2 kIn thick LVL (6.0 km1sec). A high velocity (7. I kmlsec) layer underlies the LVL. The velocity jump from 6.0 km/sec in the LVL 10 7.1 krn/sec represents the top of the lower crustal layer at 20.4 km depth in the Mahanadi delta area. The jump of velocity from 7.1 krnl sec to 8.1 km/sec at 34.6 km depth occurs at the Moho discontinuity. Zone-3 includes the Bundelkhand craton, Vindhyan basin covered by Hirapur - Mandla profile (Kaila et al. 1987b) and KhajuriaKalan - Puigaon section (Kaila and Rao, 1985) across the Narmada lineament. The crustal velocity structure for this zone is shown in Fig.5. The crustal thickness is around 43 km in Hirapur Narshinghgarh and Katangi - Mandla part of the profile and around 41.2 km in Narshinghgarh - Katangi part. Thus the Moho depth in zone 3 is similar to the Indian shield region. The JOUR.GEOL.SOC.INDIA, VOL.49.APRIL.1997 VARIATION OF CRUSTAL VELOCITY STRUCTURE, DSS STUDIES AND IMPLICATIONS 399 VELOCITY (KM/S) 1.0 3.0 5.0 7.0 9.0 0.0 tL..LLIJ.-d'oOtIIJIL..L.J..J..LLJl..1 VELOCITY (KM/S) 3.0 5,0 7.0 9.0 10.0 g 20.0 ~ ~ 30.0 cE ~ Q 40.0 GO Shield Region 50.0 G-al Katangi - Mandla tr--6--i> Narsin(hrarh - Katanri ~ Chhipener - Rahatgaon -t--f Hirapur - Narsinrhgarh ~ Betul - Multai - Pult;aon ~ Kbajuria Kalan - Sehore 60.0 Pagariahat..J _ _ _ _ _ _ _ _ _ _ _ Fig.S. Interval velocity-depth function for zone-3. Kaila et ai. (1985; 1987b) may be referred for names of places. 10.0 -. 20.0 ~ ::t...

... basin in the Chhindwara, Mandla and Jabalpur (CMJ) sector of Madhya Pradesh ( Figure 1 ), the DVS and intertrappean sediments are designated as the Amarkantak Group ( Geological Survey of India 2000b ). This group is further divided into eight formations: the Mandla, Dhuma, Piparadhi, Linga, Multai...

... lamprophyre as an assimilate. Sr-Nd isotopic ratios of the Cenozoic tholeiitic dykes of the Multai area of the Deccan volcanic province indicate ( Kumar et al., 2022 ) depleted mantle source and affinity to the Mahabaleshwar and Poladpur formations. Sheth et al. (2022 ) show that the outcrop structures...

... 1.166 1.035 0.888 0.692 0.994 1.24 0.99 0.97 0.96 EuA and CeAl calculated according to MUlTay et al. (1992) and CeAl calculated according to Sholkovitz (1994). ~REE (ppm) 0° ( La /Vb)n ~ LREE I ~ HREE 50 100 150 .- -~ x 200 )0- nw. 0 250 300 350 400 Fig.6. Vertical profiles of tREE (ppm), (LaWb)a' EuA...

... and eastern part of the Betul belt. The VMS mineralization at Banskhapa is located in the high-magnesian schists, which occur as conformable bodies within a milieu of acid volcanics. Out of these Muariya VHMS deposit is important and occurs to the NNW of Multai. The other important Bhuyari VHMS prospect...

... Plateau after Narmada river. It originates at Tapi Kund near Multai in Betul district of Madhya Pradesh and traverses a length of around 784 km before draining into the Arabian sea. The entire Tapi basin is divided into three sub-basins, namely, Upper Tapi basin (Tapi Kund to Hatnur reservoir), Middle...