The formation and evolution of the East China Sea Shelf Basin: A new view

Zhu, Weilin; Zhong, Kai; Fu, Xiaowei; Chunfeng, Chen; Zhang, Minqiang; Gao, Shunli

doi:10.1016/j.earscirev.2018.12.009

Cited by 81 publications

(4 citation statements)

References 97 publications

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“…The Cenozoic ECSSB is located off of the southeast coast of mainland China to the west of the Ryukyu Islands (Japan) [18] (Figure 1a). It is NNE-SSW trending and covers an area of 240,000 km 2 .…”

Section: Geological Settingmentioning

confidence: 99%

Geochemical Characterization of the Eocene Coal-Bearing Source Rocks, Xihu Sag, East China Sea Shelf Basin, China: Implications for Origin and Depositional Environment of Organic Matter and Hydrocarbon Potential

et al. 2021

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Eocene coal-bearing source rocks of the Pinghu Formation from the W-3 well in the western margin of the Xihu Sag, East China Sea Shelf Basin were analyzed using Rock-Eval pyrolysis and gas chromatography–mass spectrometry to investigate the samples’ source of organic matter, depositional environment, thermal maturity, and hydrocarbon generative potential. The distribution patterns of n-alkanes, isoprenoids and steranes, high Pr/Ph ratios, abundant diterpanes, and the presence of non-hopanoid triterpanes indicate predominant source input from higher land plants. The contribution of aquatic organic matter was occasionally slightly elevated probably due to a raised water table. High hopane/sterane ratios and the occurrence of bicyclic sesquiterpanes and A-ring degraded triterpanes suggest microbial activity and the input of microbial organisms. Overwhelming predominance of gymnosperm-derived diterpanes over angiosperm-derived triterpanes suggest a domination of gymnosperms over angiosperms in local palaeovegetation during the period of deposition. The high Pr/Ph ratios, the plot of Pr/n-C17 versus Ph/n-C18, the almost complete absence of gammacerane, and the distribution pattern of hopanes suggest that the samples were deposited in a relatively oxic environment. Generally, fluctuation of redox potential is coupled with source input, i.e., less oxic conditions were associated with more aquatic organic matter, suggesting an occasionally raised water table. Comprehensive maturity evaluation based on Ro, Tmax, and biomarker parameters shows that the samples constitute a natural maturation profile ranging from marginally mature to a near peak oil window. Hydrogen index and atomic H/C and O/C ratios of kerogens suggest that the samples mainly contain type II/III organic matter and could generate mixed oil and gas.

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Section: Geological Settingmentioning

confidence: 99%

Geochemical Characterization of the Eocene Coal-Bearing Source Rocks, Xihu Sag, East China Sea Shelf Basin, China: Implications for Origin and Depositional Environment of Organic Matter and Hydrocarbon Potential

et al. 2021

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“…Below that depth, the synrift sequences experienced intensive shortening, leading to the formation of inversion structures characterized by local folds and small faults on the left side and as well the basement faults. In addition, a large boundary fault extends up to the shallow formations on the right hand side of this sub-basin (Zhu et al, 2019). In this region, it is relatively easy to perform manual picking on the migrated section and CIGs.…”

Section: The North Jinshan Sagmentioning

confidence: 99%

“…The 2D seismic data between the west slope belt and the central structure belt are available for this test. Taking a regional unconformity surface related to the late Eocene Yuquan Event (denoted as "T25" in Figure 18) as a reference (G. , the shallow formations correspond to the continuous deposition from Oligocene to Neogene, while numerous faults are developed in the sequences of Eocene and older formations (Su et al, 2014;Zhu et al, 2019). Here, we apply both CG-RWI and GN-RWI approaches to build the velocity models, and examine if the latter approach can improve the velocity model building and delineate of the geologic structures.…”

Section: The Xihu Sagmentioning

confidence: 99%

Reflection Full Waveform Inversion With Second‐Order Optimization Using the Adjoint‐State Method

2021

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“…2 , Tab. S1 Supplementary Information) and its subduction processes beneath Eurasia, gave the main contribution to the geodynamic evolution 4 , 16 , 33 , 35 – 44 . Thus, in this paper we provide 2D numerical simulations of the interactions between the Pacific and north-eastern Eurasia plates during the last 57 Ma, to investigate the role of variable plate kinematics of a subducting plate on the evolution of a subduction zone and the relative deformation regime along the continental upper plate.…”

Section: Introductionmentioning

confidence: 99%

Variable plate kinematics promotes changes in back-arc deformation regime along the north-eastern Eurasia plate boundary

Ficini,

Cuffaro,

Doglioni

et al. 2024

Sci Rep

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The stretching of the lithosphere leading to back-arc basins formation generally develops behind arc-trench systems and is considered the consequence of slab retreat relative to the upper plate. Here, we examine the deformation regime evolution within the overriding plate due to subduction processes, using thermo-mechanical numerical simulations. We explore the north-eastern Eurasia plate boundary and the mechanisms of subducting Pacific plate since 57 Ma. During this time interval, several extensional basins formed along the Eurasia margin, such as the East China Sea, the Japan Sea, and the Kuril basin. Here, we increased the simulation complexity, with the inclusion of (i) the kinematic variability of the Pacific plate over the geological past with respect to a fixed Eurasia, incorporating time-dependent (i.e., temporally evolving) velocities computed from plate motion reconstructions; (ii) a Low-Velocity Zone within the asthenosphere, and (iii) a horizontal eastward mantle flow. Our results show a crucial role of the mantle flow for the development of lithospheric extension and back-arc basin opening, and a main kinematic control of the subduction trench position, which advances and retreats, into distance intervals in the order of $$\sim$$ ∼ 100 km, and providing stages of compression and extension in a back-arc basin.

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The formation and evolution of the East China Sea Shelf Basin: A new view

Cited by 81 publications

References 97 publications

Geochemical Characterization of the Eocene Coal-Bearing Source Rocks, Xihu Sag, East China Sea Shelf Basin, China: Implications for Origin and Depositional Environment of Organic Matter and Hydrocarbon Potential

Geochemical Characterization of the Eocene Coal-Bearing Source Rocks, Xihu Sag, East China Sea Shelf Basin, China: Implications for Origin and Depositional Environment of Organic Matter and Hydrocarbon Potential

Reflection Full Waveform Inversion With Second‐Order Optimization Using the Adjoint‐State Method

Variable plate kinematics promotes changes in back-arc deformation regime along the north-eastern Eurasia plate boundary

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