Variation in dip-angle of the Indian plate subducting beneath the Burma plate and its tectonic implications

Provenance of the Eocene sandstones in the southern Chindwin Basin, Myanmar: Implications for the unroofing history of the Cretaceous–Eocene magmatic arc

“…The recent structural and kinematic analysis of the IBR, based on seismic reflection, geodetic and geological field data, has indicated that the IBR is having right-lateral shearing in the innermost part and E-W shortening in the outermost part due to the diffuse strain partitioning, related to the oblique convergence of the India/Sunda plates (Maurin and Rangin, 2009). However, the still active subduction in the western Myanmar is confirmed by a number of studies (e.g., Dasgupta et al, 2003;Satyabala, 2003;Nielsen et al, 2004;Khan, 2005;Socquet et al, 2006). The Indian plate subducts at a rate of 35-50 mm/yr.…”

Bearing of plate geometry and rheology on shallow-focus mega-thrust seismicity with special reference to 26 December 2004 Sumatra event

“…A literature review for Benioff trajectory reconstruction from hypocentral distribution revealed that the procedures have inherent inconsistency. The actual trend of Benioff zone trajectory can be estimated either assuming the best fit of the slab upper surface (Cardwell and Isacks, 1978;Furlong et al, 1982;Ruff and Kanamori, 1983a;Christova, 2004) or as a best fit down through the hypocentral distribution (Luyendyk, 1970;Isacks and Molnar, 1971;Khan, 2005;Khan and Chakraborty, 2005). From historic database the well-defined seismicity trend in the depth-dip angle profile allowed reconstruction of slab upper surface for both the sectors I and II.…”

Seismic b-Value and the Assessment of Ambient Stress in Northeast India

“…Northward convergence, anticlockwise rotation against Eurasia and oblique convergence against the Southeast Asia (DEWEY and BIRD, 1970;FITCH, 1970;SEEBER et al, 1981;LE DAIN et al, 1984;KLOOTWIJK et al, 1985;MAUNG, 1987;KHAN, 2005b) characterise the journey of the Indian plate since the Cretaceous period, and have led to the development of complicated tectonics in the northeast part of India. According to CURRAY (1989), the situation became even more complex near the syntaxis where the three plates viz., Indian, Eurasian and the Burma platelet, joined together and, accordingly, the deformational style changed from dextral shear, between India and Southeast Asia in the east, to a frontal collision at the eastern Himalayas.…”