SUMMARY

Some results of research on Cenozoic basins in the continental shelf of Việt Nam

Trịnh Xuân Cường, Phan Ngọc Trung, Nguyễn Trọng Tín, Nguyễn Thanh Tùng, Nguyễn Thu Huyền, Nguyễn Anh Đức,
Nguyễn Thị Dậu, Nguyễn Thanh Lam, Lê Chi Mai, Đỗ Quang Đối, Nguyễn Thế Hùng, Nguyễn Hoàng Sơn

Based on the updated seismic, magnetic and gravity data on the Việt Nam Continental Shelf, the Tertiary sedimentary basins, namely Sông Hồng, Phú Khánh, Hoàng Sa, Cửu Long, Nam Côn Sơn, Tư Chính - Vũng Mây, Trường Sa and Malay - Thổ Chu, have been clearly specified. Geostructural and stratigraphic analyses show that these basins were formed in Paleogene and mainly controlled by Oligocene-Miocene extrusion and the East Sea floor spreading. These two factors interacted with each other. The different shapes of the East Việt Nam Tertiary basins in the East of Việt Nam were due to specific geodynamic factors of each area. The Eocene-Oligocene sediments were deposited mainly in the delta plain and lacustrine environments near the supply sources, playing an important role as the source rocks. The Miocene and younger sediments were formed in depositional environment ranging from delta plain in the West to shallow and deep sea in the East. The petroleum systems of the basins and areas have been accurately identified by updated high-quality data with advanced technologies and studying methods. These studies have provided good results and maps which ensure sufficient reliability for studying and delineating prospective areas and assessing hydrocarbon potential, meeting the requirements for planning and management of marine resources and environment in the coming years and long-term future.

Người biên tập: GS.TS Trần Nghi.