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- Title
Significance of Sequence Stratigraphy Research in the Assessment of Groundwater Potential of Coastal Quaternary Sediments in Vietnam's Ninh Thuan—Binh Thuan Area.
- Authors
Nghi, Tran; Van Tuan, Nguyen; Thu, Trinh Hoai; Shakirov, Renat; Syrbu, Nadezhda; Cuong, Do Huy; Thanh, Dinh Xuan; Hung, Do Tien; Huong, Tran Thi Thuy; Dong, Mai Duc; Lee, Natalia
- Abstract
Ninh Thuan and Binh Thuan are two provinces in South Central Vietnam with two very unique phenomena: (1) Having a uniquely hot and dry climate in the context that Vietnam's general climate is tropical and humid and (2) The red sand plateau has spectacular scenery and a huge volume that is superior to other coastal sand dunes of Vietnam. Quaternary geologists and hydrogeologists have studied many coastal areas of Ninh Thuan—Binh Thuan since 1975, but have not yet been able to answer four very basic questions: (1) arid climate and very poor groundwater storage capacity are related to the very thin Quaternary sediments and uplifting Tertiary geological structure? (2) Where does quartz sand come from with such a huge, magnificent and beautiful red color? (3) When was the sand dune formed and what is the mechanism of formation? (4) Do the sand dunes are a good aquifer? To answer the above questions, the authors have studied sequence stratigraphy on both objects: (1) inner low plains and (2) coastal sand dunes. According to that approach, the sand dunes are divided into 5 sequences as follows: (1) sequence 1 (Sq1- ) has an early Pleistocene age (1600–700 ka BP); (2) Sequence 2 (Sq2- ) has an early-middle Pleistocene age (700–150 ka BP); (3) Sequence 3 (Sq3- ) has late middle Pleistocene age (150–70 ka BP); (4) Sequence 4 (Sq4- ) has an early-late Pleistocene age (70–30 ka BP); and (5) Sequence 5 (Sq5- -Q2) has from late late Pleistocene to Holocene. These 5 sequences constitute an aquifer of good quality with undivided Quaternary stratigraphy. In the alluvial-lagoon plains, the sequence stratigraphical column has only 4 sequences: (1) Sq2: ; (2) Sq3: ; (3) Sq4: ; and (4) Sq5: -Q2. These sequences constitute two aquifers of poor quality: (1) aquifer qp1 correspond to lowstand alluvial gravelly sand facies complexes of from early middle to early late Pleistocene (Sg( - ) LST); and (2) aquifer qp2 correspond to lowstand late late Pleistocene gravelly sand facies complex (Sg LST).
- Subjects
VIETNAM; SEQUENCE stratigraphy; COASTAL sediments; SAND dunes; SAND; GROUNDWATER; MIDDLE age
- Publication
Lithology & Mineral Resources, 2023, Vol 58, Issue 5, p478
- ISSN
0024-4902
- Publication type
Article
- DOI
10.1134/S0024490223700207