Basement structures underneath the northern South Yellow Sea basin (East China): Implications for the collision between the North China and South China blocks

Xu, Minggang; Chen, Jianwen; Liang, Jie; Yinguo, Zhang; Baohua, Lei; Shi, Jingli; Wang, Jianqiang; Liu, Jun; Liu, Hong

doi:10.1016/j.jseaes.2019.104040

Cited by 13 publications

(10 citation statements)

References 38 publications

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“…4,27 The Indosinian unconformity in the SYSB has been well-studied using multichannel seismic data. 11,28,29 This tectonic uplift and erosion event likely occurred from the Early Cretaceous to the Miocene, and the eroded thickness ranges from ∼1200 to 1400 m. 7 Moreover, an eroded thickness of 1000 m between the Upper Devonian and the Lower Silurian was estimated from seismic profiles using stratigraphic trend surface analysis. The kinetic parameters of the source rocks referred to an analogous kinetics model in the software based on the analysis of the Rock-Eval data.…”

Section: Methodsmentioning

confidence: 99%

“…Two major unconformities were identified, and a detailed representation of erosional events is essential to the model. , The Indosinian unconformity in the SYSB has been well-studied using multichannel seismic data. ,, This tectonic uplift and erosion event likely occurred from the Early Cretaceous to the Miocene, and the eroded thickness ranges from ∼1200 to 1400 m . Moreover, an eroded thickness of 1000 m between the Upper Devonian and the Lower Silurian was estimated from seismic profiles using stratigraphic trend surface analysis.…”

Section: Methodsmentioning

confidence: 99%

“…The stratigraphic units of the SYSB consist of Precambrian metamorphic basement rocks, Paleozoic to Triassic marine craton sediments, and overlying terrigenous sediments. ,, The marine sediments are widespread in the entire basin, whereas the Mesozoic–Cenozoic terrigenous (fluvial–alluvial and lacustrine) sediments developed mainly within the rifted depressions. The terrigenous clastic sediments are more than 8 km thick in the North Depression but are usually absent in the Central Uplift of the SYSB…”

Section: Geological Frameworkmentioning

confidence: 99%

“…7,8 The new seismic survey and drilling borehole (CSDP-2) confirmed the presence of widespread thick Paleozoic marine deposits in the Central Uplift of the SYSB and revealed multiple sets of Silurian− Lower Triassic source rocks. 6,9 The Central Uplift (also referred to as the Laoshan Uplift) of the SYSB, 10,11 where the CSDP-2 borehole is located (Figure 1), is therefore considered to be one of the most important potential hydrocarbon-bearing areas.…”

Section: Introductionmentioning

confidence: 99%

“…These wells are all distributed in the North Depression and South Depression, and no exploratory well was drilled in the Central Uplift. Although the Mesozoic–Cenozoic continental detrital deposition in the depression areas of the basin has long been of particular interest as a prospective hydrocarbon target, oil and gas exploration has not yet been realized. , The new seismic survey and drilling borehole (CSDP-2) confirmed the presence of widespread thick Paleozoic marine deposits in the Central Uplift of the SYSB and revealed multiple sets of Silurian–Lower Triassic source rocks. , The Central Uplift (also referred to as the Laoshan Uplift) of the SYSB, , where the CSDP-2 borehole is located (Figure ), is therefore considered to be one of the most important potential hydrocarbon-bearing areas.…”

Section: Introductionmentioning

confidence: 99%

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Hydrocarbon Generation Evaluation, Burial History, and Thermal Maturity of the Lower Triassic–Silurian Organic-Rich Sedimentary Rocks in the Central Uplift of the South Yellow Sea Basin, East Asia

et al. 2020

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This study focuses on the organic-rich rocks in the Central Uplift of the South Yellow Sea Basin (SYSB) using the CSDP-2 borehole, which was drilled through the integrated Lower Triassic–Silurian sediments and yielded approximately 2736 m of cores. Geochemical analyses of core samples, including Rock-Eval pyrolysis, elemental analysis, maceral analysis, and gas chromatography–mass spectrometry, revealed multiple sets of effective source rocks developed from the Lower Triassic Qinglong Formation to the Lower Silurian Gaojiabian Formation. The organic matter is dominated by types II1–2–III kerogen, most of which are mature to post-mature. Comprehensive geochemical analysis shows that Permian and Lower Carboniferous mudstones are the most important source rocks and have strong hydrocarbon generation capacity. Most of the source rocks are dominated by planktonic/bacterial sources, deposited mainly in a low-salinity marine environment, and influenced by the input of terrigenous detrital materials. Basin modeling results show that most of the Paleozoic–Mesozoic source rocks in the Central Uplift generally entered the oil-generation window during the Triassic to Late Jurassic. The timing of hydrocarbon generation and expulsion was simultaneous or earlier than the collisional orogenic movement between the Sino–Korean Platform and the Lower Yangtze Craton, which may have some destructive impact on the oil and gas preservation. Therefore, it is preservation condition rather than source rocks that may be one of the most important elements for hydrocarbon accumulation in the Central Uplift of the SYSB.

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Section: Methodsmentioning

confidence: 99%