1. Full name: Nguyen Thi Huyen Trang                            2. Sex: Female

3. Date of birth: 18/01/1986                                           4. Place of birth: Bac Ninh

5. Admission decision number: 3973/QĐ-ĐHKHTN date 24/11/2016 of VNU University of Sceince rector.

6. Changes in academic process: During the training process, the PhD student was allowed to suspend semesters V and VI according to Decision 4705/QD-DHKHTN for the reason to taking care a newborn child and continuing to study again according to Decision 4199/QD-DHKHTN.

7. Official thesis title: Late Pleistocene - Holocene sedimentary evolution in the coastal zone from Cua Tieu river mouth to Ca Mau cape

8. Major: Geology                                                         9. Code: 9440201.01

10. Supervisors: Prof. Tran Nghi, Assoc. Prof. Dinh Xuan Thanh

11. Summary of the new findings of the thesis

+ The thesis has clarified the evolutionary history of Late Pleistocene – Holocene sediments (Q13b - Q2) in the coastal zone from Cua Tieu river mouth to Ca Mau cape in 3 phases:

1) The lowstand systems tract (LST) from 45,000 to 18,000 years BP is characterized by a complex of alluvial muddy sand facies in the Mekong Delta and Ca Mau peninsula;

2) The transgressive systems tract (TST) from about 18,000 to 5,000 years BP the Mekong Delta region is characterized by the alluvial muddy sand facies and the estuary sandy mud facies dominated in the incised valley, the intertidal sand facies and the the coastal swamp and bay- lagoon mud facies in the uplifting terrain;

3) The highstand systems tract (HST) from 5,000 years of BP up to now, it is the connecting phase of the two deltas.

+ The thesis proves that mid-late Holocene sediments (Q22-3) (from 5000 years to now) of the coastal zone from Cua Tieu river mouth to Ca Mau cape are composed of two different lithfacies complex in origin and forming conditions. The tidal plains characterized by tidal and coastal lithofacies while the deltaic plain dominated by alluvial, deltaic and subaquous lithofacies. The coastal zone of Cuu Long Delta evolved according to the rules of an accretion delta with river dynamic playing a key role. Meanwhile, the coastal zone of the Ca Mau peninsula evolved by the mechanism of assembling small tidal plains into larger tidal plain with sediment brought in by the coastal currents. That process is governed by the tidal dynamics.

12. Paratical applicability, if any: Research on characteristics of sedimentary facies, topography-geomorphology and changing tendency of coastal zone is the most reliable scientific basis for properly orientation in resource exploitation, coastal spatial planning in the direction of sustainable development.

13. Further research directions, if any: Research on the sedimentary evolution of the southern delta coastal zone is the foundation  for further research on two urgent issues:

(1) Causes of coastal erosion of Ca Mau peninsula and Cua Dai area and mitigation measures;

(2) Research on the scientific basis of coastal planning and management towards sustainable development

14. Thesis-related publications:

Nguyen Thi Huyen Trang, Tran Nghi, Dinh Xuan Thanh (2016), “Characteristics of Late Pleistocene - Holocene Lithofacies in the Mekong Deltaic Coastal Zone, Southern Vietnam”, VNU Journal of Science, Earth and environmental sciences Vol.32, No.2S, pp.69-80.

Nguyen Thi Huyen Trang, Tran Nghi, Dinh Xuan Thanh, Nguyen Thi Tuyen (2018), “Sandy Ridges System Evolution of Mekong Delta, Southern Vietnam and Its Role in Contructing History of Mekong Delta in Late Holocene”, VNU Journal of Science, Earth and environmental sciences Vol.34, No.2, pp.59-73.

Nguyen Thi Huyen Trang, Tran Nghi, Dinh Xuan Thanh, Nguyen Dinh Thai, Tran Thi Thanh Nhan (2019), “Late Pleistocene - Holocene Sedimentary Evolution of Nam Bo Plain and Correlation from the Ca Mau Peninsula to the Mekong River Delta in Midle-Late Holocene”, VNU Journal of Science: Earth and Environmental Sciences, Vol. 35, No. 4, pp.97-120.