南沙中部海域沉积地层特征及其构造成因

吴朝华; 赵美松; 刘海龄

doi:10.3799/dqkx.2011.089

Volume 36 Issue 5

Sep. 2011

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WU Chao-hua, ZHAO Mei-song, LIU Hai-ling, 2011. Characteristics of Sedimentary Strata in Central Nansha Sea Area and Its Tectonic Origin. Earth Science, 36(5): 853-860. doi: 10.3799/dqkx.2011.089

Citation:

WU Chao-hua, ZHAO Mei-song, LIU Hai-ling, 2011. Characteristics of Sedimentary Strata in Central Nansha Sea Area and Its Tectonic Origin. Earth Science, 36(5): 853-860. doi: 10.3799/dqkx.2011.089

WU Chao-hua, ZHAO Mei-song, LIU Hai-ling, 2011. Characteristics of Sedimentary Strata in Central Nansha Sea Area and Its Tectonic Origin. Earth Science, 36(5): 853-860. doi: 10.3799/dqkx.2011.089

Citation:

WU Chao-hua, ZHAO Mei-song, LIU Hai-ling, 2011. Characteristics of Sedimentary Strata in Central Nansha Sea Area and Its Tectonic Origin. Earth Science, 36(5): 853-860. doi: 10.3799/dqkx.2011.089

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Characteristics of Sedimentary Strata in Central Nansha Sea Area and Its Tectonic Origin

doi: 10.3799/dqkx.2011.089

WU Chao-hua^{1, 2
,},
ZHAO Mei-song^{1, 2},
LIU Hai-ling^{2
,
,}

1.
Graduate University of Chinese Academy of Sciences, Beijing 100049, China
2.
CAS Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Guangzhou 510301, China

Received Date: 2011-04-18
Publish Date: 2011-09-15

Abstract

Abstract

To further understand the characteristics and tectonic evolution of sedimentary in the central waters of the Nansha, we select typical survey line 02N02 in this area and present detailed interpretation of its structure and stratigraphy.It finds that there is a set of thick Mesozoic or even older strata in the area, especially in the southern area, which generally has strong folding, and there is a series of NE-NEE-trending faults controlling the deposition obviously in the wings of folds.Anticline has been eroded at the top, deposited in the wings.The filling and coating deposition between Cenozoic T_g (the top of Middle Eocene) and T₄₀ (the bottom of Middle Miocene) interface in rift valleys were controlled by faults, and the formation of cap rock above T₄₀ with little change in stratigraphic thickness were less controlled by faults.Combining these features above and comparing the line 87N4 intersecting with line 02N02 and the line 90N9 nearby the line 02N02 to the east, and the line 94N2 crossing this area, we analyze the Mesozoic and Cenozoic tectonic origin of the central Nansha Sea area, and further discuss its evolution.
- central Nansha Sea area,
- structural features,
- tectonic evolution,
- sedimentology,
- filling deposits,
- Meso-Cenozoic,
- marine geology

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References(42)

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