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2009 Vol. 20, No. 1

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Tectonics and Sedimentary Basins of the South China Sea: Challenges and Progresses
周蒂, 姚伯初
2009, 20(1) doi: 10.1007/s12583-009-0001-8
Crustal Structure beneath Yinggehai Basin and Adjacent Hainan Island, and Its Tectonic Implications
吴世敏, 丘学林, 周蒂, 曾刚平, 夏戡原, 叶三余
2009, 20(1) doi: 10.1007/s12583-009-0002-7
Two NE-SW trending wide-angle seismic profiles were surveyed across the Chinese side of the Yinggehai (莺歌海) basin (YGHB) with ocean bottom hydrophones (OBHs) and piggyback recorded by onshore stations located on the Hainan (海南) Island. Detailed velocity-depth models were obtained through traveltime modeling and partially constrained by amplitude calculations...
Crustal Structure and Extension from Slope to Deepsea Basin in the Northern South China Sea
胡登科, 周蒂, 吴湘杰, 何敏, 庞雄, 王玉薇
2009, 20(1) doi: 10.1007/s12583-009-0003-6
The newly acquired long-cable multi-channel seismic (MCS) lines were used to study the crustal structure and extension in an NW-SE elongated 150 km by 260 km strip from the slope to the deepsea basin in the northern South China Sea (SCS). These profiles are of good penetration that Moho is recognizable in ~70% length of the lines. Seismostratigraphic interpretation and time-depth conversion were conducted...
Deep Structure and Dynamics of Passive Continental Margin from Shelf to Ocean of the Northern South China Sea
吴湘杰, 庞雄, 施和生, 何敏, 申俊, 张向涛, 胡登科
2009, 20(1) doi: 10.1007/s12583-009-0004-5
To study the deep dynamic mechanism leading to the difference in rifting pattern and basin structure from shelf to oceanic basin in passive continental margin, we constructed long geological sections across the shelf, slope and oceanic basin using new seismic data. Integrated gravity-magnetic inversion and interpretation of these sections were made with the advanced dissection method...
Baiyun Movement: A Significant Tectonic Event on Oligocene/Miocene Boundary in the Northern South China Sea and Its Regional Implications
庞雄, 陈长民, 朱明, 何敏, 申俊, 连世勇, 吴湘杰, 邵磊
2009, 20(1) doi: 10.1007/s12583-009-0005-4
A significant geologic event occurred on the Oligocene/Miocene boundary at 23.8 Ma in the northern South China Sea, which is named the Baiyun (白云) movement in this article. This event strongly affected not only the South China Sea, but also East Asia. After the Baiyun event, the ridge of seafloor spreading of the South China Sea jumped southward and rotated counterclockwise, and a strong subsidence occurred in the Baiyun sag of the Pearl River Mouth basin...
Denudation History of South China Block and Sediment Supply to Northern Margin of the South China Sea
闫义, 胡小琼, 林舸, 夏斌, 李晓勇
2009, 20(1) doi: 10.1007/s12583-009-0006-3
On the basis of apatite fission track (AFT) analyses, this article aims to provide a quantitative overview of Cenozoic morphotectonic evolution and sediment supply to the northern margin of the South China Sea (SCS). Seventeen granite samples were collected from the coast to the inland of the South China block. Plots of AFT age against sample location with respect to the coastline show a general trend of youngling age away from the coast, which implies more prolonged erosion and sediment contribution at the inland of the South China Sea during post break-up evolution...
Relationship between Formation of Zhongyebei Basin and Spreading of Southwest Subbasin, South China Sea
高红芳, 周蒂, 邱燕
2009, 20(1) doi: 10.1007/s12583-009-0007-2
The Zhongyebei (中业北) basin (ZYBB) is an NE-striking, narrow and small sedimentary basin superimposing the southern 1/2 segment of the proposed spreading axes of the SW subbasin of the South China Sea (SCS). More than 4 500 m strata were identified in the Zhongyebei basin, including the Paleogene lower structure layer and the Neogene upper structure layer. The SW subbasin of the South China Sea has been regarded as an oceanic basin opened by seafloor spreading, as evidenced by the flat and deep (> 4 000 m mostly) seafloor with linear magnetic anomalies, and by the shallow Moho depth of < 12 km as estimated from gravity modeling...
Links among Slope Morphology, Canyon Types and Tectonics on Passive and Active Margins in the Northernmost South China Sea
Ho-Shing Yu*, Emmy T Y Chang
2009, 20(1) doi: 10.1007/s12583-009-0008-1
We examine slope profile types and variations in slope gradient and slope relief with depth for both passive and active margins in the northern most South China Sea. The passive South China margin is characterized by an exponential slope profile, mainly associated with clustered slope-confined canyons. The active Taiwan margin shows a linear-like shape with great variations along the lower slope...
Numerical Analysis and Simulation Experiment of Lithospheric Thermal Structures in the South China Sea and the Western Pacific
林舸, 彭美丽, 赵崇斌, 张露, 张德圣, 刘士林
2009, 20(1) doi: 10.1007/s12583-009-0009-0
The asthenosphere upwelled on a large scale in the western Pacific and South China Sea during the Cenozoic, which formed strong upward throughflow and caused the thermal structure to be changed obviously. The mathematical analysis has demonstrated that the upward throughflow velocity may have varied from 3?1011 to 6?1012 m/s. From the relationship between the lithospheric thickness and the conductive heat flux, the lithospheric heat flux in the western Pacific should be above 30 mW/m2, which is consistent with the observed data...
Lithospheric Thermal Isostasy of North Continental Margin of the South China Sea
Chen Shi* (陈石), Zhang Jian (张健), Sun Yujun (孙玉军), Shi Yaolin (石耀霖)
2009, 20(1) doi: 10.1007/s12583-009-0010-7
Accompanied with rifting and detaching of the north continental margin of the South China Sea, the crust and the lithosphere become thinner away from the continental margin resulting from the tectonic activities, such as tensile deformation, thermal uplift, and cooling subsidence, etc.. Integrated with thermal, gravimetric, and isostatic analysis techniques, based on the seismic interpretation of the deep penetration seismic soundings across the northern margin of the South China Sea, we reconstructed the lithospheric thermal structure and derived the variation of the crust boundary in the east and west parts of the seismic profile by using gravity anomaly data...
Kinematics of Convergence and Deformation in Luzon Island and Adjacent Sea Areas: 2-D Finite-Element Simulation
刘再峰, 詹文欢, 姚衍桃, 詹美珍, 张殿广
2009, 20(1) doi: 10.1007/s12583-009-0012-3
The Luzon Island is a volcanic arc sandwiched by the eastward subducting South China Sea and the northwestward subducting Philippine Sea plate. Through experiments of plane-stress, elastic, and 2-dimensional finite-element modeling, we evaluated the relationship between plate kinematics and present-day deformation of Luzon Island and adjacent sea areas...
Characteristics and Hydrocarbon Potential of Mesozoic Strata in Eastern Pearl River Mouth Basin, Northern South China Sea
Hao Hujun* (郝沪军), Zhang Xiangtao (张向涛), You Hongqing (尤洪庆), Wang Ruiliang (汪瑞良)
2009, 20(1) doi: 10.1007/s12583-009-0013-4
The well LF35-1-1 in the eastern Pearl River Mouth basin (PRMB) of the northern South China Sea revealed unmetamorphosed Middle–Late Jurassic neritic-bathyal sediments and Cretaceous fluvial-lacustrine sediments. Three tectonic movements were identified in Late Jurassic to Early Creta-ceous, late Early Cretaceous, and Late Cretaceous to Paleocene, respectively...
Petroleum System in Deepwater Basins of the Northern South China Sea
吴时国, 韩清华, 马玉波, 董冬冬, 吕福亮
2009, 20(1) doi: 10.1007/s12583-009-0014-3
The northern South China Sea margin has experienced a rifting stage and a post-rifting stage during the Cenozoic. In the rifting stage, the margin received lacustrine and shallow marine facies sediments. In the post-rifting thermal subsidence, the margin accumulated shallow marine facies and hemipelagic deposits, and the deepwater basins formed. Petroleum systems of deepwater setting have been imaged from seismic data and drill wells...
Patterns and Dynamics of Rifting on Passive Continental Margin from Shelf to Slope of the Northern South China Sea: Evidence from 3D Analogue Modeling
孙珍, 周蒂, 吴世敏, 钟志洪, 姜建群, 樊浩
2009, 20(1) doi: 10.1007/s12583-009-0011-6
Affected by thermal perturbation due to mantle uprising, the rheological structure of the lithosphere could be modified, which could lead to different rifting patterns from shelf to slope in a passive continental margin. From the observed deformation style on the northern South China Sea and analogue modeling experiments, we find that the rift zone located on the shelf is characterized by half grabens or simple grabens controlled mainly by long faults with large vertical offset, supposed to be formed with normal lithosphere extension...
Tectonic Evolution and Dynamics ofDeepwater Area of Pearl River Mouth Basin, Northern South China Sea
董冬冬, 张功成, 钟锴, 袁圣强, 吴时国
2009, 20(1) doi: 10.1007/s12583-009-0016-1
Quantitative studies on the evolution and dynamics of the deepwater area of Pearl River Mouth basin (PRMB) were carried out based on the latest geological and seismic data. The study area is generally in an extensional state during the Cenozoic...
Filling History and Post-Breakup Acceleration of Sedimentation in Baiyun Sag, Deepwater Northern South China Sea
周蒂, 孙珍, 廖杰, 赵忠贤, 何敏, 吴湘杰, 庞雄
2009, 20(1) doi: 10.1007/s12583-009-0015-2
The Baiyun (白云) sag in the southern Pearl River Mouth basin is the largest and deepest sag in deepwater northern South China Sea. Researches and exploration in this sag have revealed many distinct features of the sag. This article reports its filling history through backstripping of depth data of interpreted sequence boundaries...
Features of Late Cenozoic Deepwater Sedimentation in Southern Qiongdongnan Basin, Northwestern South China Sea
袁圣强, 姚根顺, 吕福亮, 胡冰, 贺晓苏, 王彬, 李丽
2009, 20(1) doi: 10.1007/s12583-009-0017-0
Based on high resolution 2D and 3D seismic data acquired in recent years, using sequence stratigraphy analysis and geophysical methods, we discuss the features of Late Cenozoic deepwater sedimentation in the southern Qiongdongnan (琼东南) basin. The study area entered a bathyal slope environment in the Miocene. The channel developed in the Sanya (三亚) Formation was controlled by a fault break, and its shingled seismic characteristics represent multiple erosion and fill, which may indicate that turbidite current developed in the slope environment...
Characteristics and Formation Mechanism of Polygonal Faults in Qiongdongnan Basin, Northern South China Sea
孙启良, 吴时国, 姚根顺, 吕福亮
2009, 20(1) doi: 10.1007/s12583-009-0018-z
Based on high-resolution 3D seismic data, we document the polygonal faults within the Miocene Meishan (梅山) Formation and Huangliu (黄流) Formation of the Qiongdongnan (琼东南) basin, northern South China Sea. Within the seismic section and time coherent slice, densely distributed extensional faults with small throw and polygonal shape were identified in map view...
Magnetic Susceptibility in Surface Sediments in the Southern South China Sea and Its Implication for Sub-sea Methane Venting
陈忠, 颜文, 汤贤赞, 刘建国, 陈木宏, 杨华平
2009, 20(1) doi: 10.1007/s12583-009-0019-y
In order to understand the characteristics of magnetic variability and their possible implication for sub-sea methane venting, magnetic susceptibility (MS) of 145 surface sediment samples from the southern South China Sea (SCS) was investigated. Magnetic particles extracted from 20 representative samples were also examined for their mineral, chemical compositions and micro- morphology...