Characteristics of Present Tectonic Stress Field in Kon Plong, Viet Nam Area and Surrounding Areas through Geological Indicators

Abstract

The present geodynamics of the Kon Plong, Kon Tum area and its surroundings are characterized by 03 structural blocks and 12 sub-structural blocks, divided by 17 major regional fault systems that have signs of activity at present. The present tectonic stress field in the region is a strike–slip–normal faulting regime with a maximum compression axis of 33904, a minimum compression axis of 065Ð02, and the intermediate axis dips vertically. The stress ratio is 0.51. In the Dak Ha and Mang Den sub-blocks, the stress field tends to shift towards normal or normal–strike–slip faulting with an NW-SE extension axis (219 – 250°) because of the effect of reservoir impoundment.