| Li Desheng,Jiang Renqi. 1989. Geological evolution of the Dongsha Uplift and its surrounding depressions in the South China Sea. Acta Oceanologica Sinica, (4):559－564 |
| Geological evolution of the Dongsha Uplift and its surrounding depressions in the South China Sea |
| Geological evolution of the Dongsha Uplift and its surrounding depressions in the South China Sea |
| Received:January 24, 1989 Revised:February 21, 1989 |
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| Abstract: |
The tectonic types of the Zhujiang (Pearl) River Mouth Basin in the South China Sea are epicontinental rift-depression basins.Prior to Early Cretaceous time, the Dongsha Uplift arid its surrounding depressions had been combined with the Eurasia Plate in a single unit.Many ENE-trending narrow rifted basins were formed in the third episode of Yanshan orogeny (Late Laramide).The rifted basins in the Paleocene and Eocene were stretched and extended, forming Zhu 1, Zhu 2 and Zhu 3 depressions.The Dongsha Uplift is located between Zhu 1 and Zhu 2 depressions.covering an area of 28 000 Km2.Its geologic evolution can be divided into four stages:
(1) Late Cretaceous-Paleocene block-faulting stage.
(2) Eocene-Oligocene uplifting and eroding stage.
(3) Late Oligocene-Early Miocene sustained subsiding stage.
(4) Middle Miocene-Recent noncompensated subsiding stage.
The Dongsha Uplift is a structural zone favourable for oil-gas accumulation. |
| 中文摘要: |
The tectonic types of the Zhujiang (Pearl) River Mouth Basin in the South China Sea are epicontinental rift-depression basins.Prior to Early Cretaceous time, the Dongsha Uplift arid its surrounding depressions had been combined with the Eurasia Plate in a single unit.Many ENE-trending narrow rifted basins were formed in the third episode of Yanshan orogeny (Late Laramide).The rifted basins in the Paleocene and Eocene were stretched and extended, forming Zhu 1, Zhu 2 and Zhu 3 depressions.The Dongsha Uplift is located between Zhu 1 and Zhu 2 depressions.covering an area of 28 000 Km2.Its geologic evolution can be divided into four stages:
(1) Late Cretaceous-Paleocene block-faulting stage.
(2) Eocene-Oligocene uplifting and eroding stage.
(3) Late Oligocene-Early Miocene sustained subsiding stage.
(4) Middle Miocene-Recent noncompensated subsiding stage.
The Dongsha Uplift is a structural zone favourable for oil-gas accumulation. |
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