Silvia Crosetto & Ian Watkinson

Myanmar has been affected by the ongoing convergence of India and Eurasia since the Paleogene. Presently India’s northward movement results in strike-slip motion along a diffuse N-S-trending plate boundary, which includes the active Kyaukkyan Fault, source of a 1912 M8.0 earthquake. This understudied and tectonically significant fault poses a considerable seismic hazard to the growing population living in the area. This project aims to reconstruct the Holocene palaeoseismic history of the Kyaukkyan Fault and its role in oblique convergence across the India-Sundaland margin.

Northward movement of the coupled India-West Burma Block relative to Sundaland led to the development of two main strike-slip systems in Eastern Myanmar: a N-S-trending fault system, including the active Sagaing Fault, the Shan Scarp Fault System and the Kyaukkyan Fault, and an E-W-trending fault system, including the Momeik and Kyaukme Faults. The Shan Scarp Fault System cross-cuts the Mogok Gneiss of the Mogok Metamorphic Belt. On the Shan Plateau, the N-S-trending Kyaukkyan Fault affects a Palaeozoic sedimentary succession and the Permo-Triassic Plateau Limestone carbonate system.