SUMMARY

Modern tectonic characteristics of the Quảng Ngãi -
Quy Nhơn coastal regions and their significance for geological hazards

Nguyễn Xuân Nam, Hoàng Ngô Tự Do, Nguyễn Chí Trung, Đào Văn Nghiêm, Lê Mình Hiếu, Đỗ Văn Vinh

There were many evidences of active tectonic movements in the coastal areas of Quảng Ngãi and Quy Nhơn, namely as following: Movement of Quaternary sediments; volcanic activities during Neogene - Quaternary period; the outcropping of hot springs, uplift and subsidence landform; and the active faults. These activities have significance in interpreting for geological hazard, especially geohazards by endogenous and exogenous activities. A sub-meridian fault system is the youngest fault systems in the study area. And in the study area, the activities of sub-meridian fault creates a lifting unit, the local subsidence. The development of eroded cliffs, triangle facets, washout, gully, landslide, toppling, fissured land surface, eroded or corroded coastline are indirected evidences to confirm the existence of recently tectonic activities happened in the studied area. To propose some solution adaptation to minimize geological hazards in coastal areas of Việt Nam. On that basis, the group of policies and solution was proposed to prevent geohazards and serve the sustainable development of coastal regions in general and research areas in particular.

Người biên tập: PGS. TS. Trần Thanh Hải.