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Detailed Reference Information |
Rajendra Prasad, B., Behera, L. and Rao, P.K. (2006). A tomographic image of upper crustal structure using P and S wave seismic refraction data in the southern granulite terrain (SGT), India. Geophysical Research Letters 33: doi: 10.1029/2006GL026307. issn: 0094-8276. |
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We present a 2-D tomographic P and S wave velocity (Vp and Vs) image with Vp/Vs ratios along N-S trending 220 km long deep seismic profile acquired in 2005, which traverses across major shear and tectonically disturbed zones in southern granulite terrain (SGT), India. The 2-D velocity model constrained down to maximum 8 km depth shows velocity anomalies (>0.2 km/s) beneath major shear zones with good spatial resolution (>0.05 km/s). The presence of high Vp (6.3--6.5 km/s), Vs (3.5--3.8 km/s), Vp/Vs (>1.75) and Poisson's ratio (0.25--0.29) indicate significant compositional changes of rocks at shallow depths (0.5 to 8 km) reveal rapid crustal exhumation of mid to lower crustal rocks. This crustal exhumation could be responsible due to Pan-African tectonothermal activity during Neoproterozoic period. |
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Abstract |
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Keywords
Seismology, Continental crust, Seismology, Tomography (6982, 8180), Hydrology, Rocks, physical properties, Exploration Geophysics, Seismic methods (3025, 7294) |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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