Seismic reflection characteristics and evolution of intrusions in the Qiongdongnan Basin: Implications for the rifting of the South China Sea

Zhao, Yanghui; Tong, Dianjun; Song, Yu; Li, Yang; Huang, Chao

doi:10.1007/s12583-016-0708-2

Cited by 30 publications

(8 citation statements)

References 37 publications

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“…Above the PD, a distinct seismic horizon can be tracked across the entire continental margin of the NSCS. The PD shows medium‐high amplitude, patchy‐to‐continuous reflections, and it has either erosional truncation below or onlap or downlap above the horizon (Ding et al., 2020; Gao et al., 2015; Yang et al., 2018; Zhao et al., 2016). This regional unconformity marks the final breakup of the continental lithosphere of the NSCS, which is referred to as the breakup unconformity (BRU) (Briais et al., 1993; Gao et al., 2015; Lei et al., 2018; Li et al., 2014; Ren et al., 2018; Sun et al., 2014).…”

Section: Rift System In the Baiyun Riftmentioning

confidence: 99%

Extension Discrepancy of the Hyper‐Thinned Continental Crust in the Baiyun Rift, Northern Margin of the South China Sea

et al. 2021

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Rifting process of sedimentary basins in the passive continental margin records the lithospheric extension that precedes the opening of oceanic basins (Ranero & Pérez-Gussinyé, 2010;Sutra et al., 2013;Zhou et al., 1995). The stretching factor, β, was proposed by McKenzie (1978) to quantify the lithospheric extension at rifted continental margins. A phenomenon has been widely reported that the stretching factor derived from faulting is far less than the one estimated from whole crustal or lithospheric thinning, referred to as "extension discrepancy" (

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Section: Rift System In the Baiyun Riftmentioning

confidence: 99%

Extension Discrepancy of the Hyper‐Thinned Continental Crust in the Baiyun Rift, Northern Margin of the South China Sea

et al. 2021

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“…Examples of these features include igneous sills and dykes, hydrothermal vents and intrusion-related forced folds (e.g. Trude, 2004;Hanset et al, 2008;Zhao et al, 2014;Zhao et al, 2016;Eide et al, 2018). Magmatic deposits may be identi ed on seismic based on stratal termination patterns, presence of eye shaped features and localized folds, and localized high amplitude discordant seismic re ections within sedimentary basin lls (e.g.…”

Section: Identi Cation Of Magmatic Bodies On Seismicmentioning

confidence: 99%

Timing of the Miocene-Quaternary magmatic intrusions in the Tanga offshore basin: correlation to age equivalent deposits in the Eyasi-Wembere basin and their implications for petroleum potential

Mvile

Kiswaka

Osinowo

et al. 2022

Preprint

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Detailed 2D qualitative seismic interpretation, coupled with core logging and analysis of elemental proxies, has been used to assess petroleum potential of the Miocene-Quaternary successions of the Tanga offshore basin. These successions have been intruded by magmatic sills and dykes. Based on seismic well tie and correlation with age equivalent onshore successions in the Eyasi-Wembere basin, the timing of these intrusions are linked to periods of tectonic episodes that influenced development of the East African Rift basins. Seismic interpretation has shown that these tectonic episodes occurred during the Miocene-Pliocene, Pleistocene and Holocene periods. The magmatic bodies are thought to have promoted source rock maturation and facilitate formation of structural elements for petroleum trapping in the basin.

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“…However, several intrusion-induced features were not observed in the analysed seismic images. Missing features include minor faulting (but still observable on seismic) of the immediate strata above the intrusion (Zhao et al, 2014;Zhao et al, 2016) which occurred during intrusion (only a major fault is seen), or saucer and eye-shaped structures (e.g., Brekke, 2000;Hansen et al, 2007).…”

Section: Dome Structuresmentioning

confidence: 99%

Permo–Triassic sedimentary fills and tectonic phases off Mid Norway: seismic investigation of the Trøndelag Platform

Kiswaka¹,

Felix²

2020

NJG

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Seismic interpretation (2D and new 3D surveys) has been used to investigate sedimentary fills and timing of tectonic activity offshore Mid Norway. This study was focused on upper Permian and Lower Triassic sedimentary basin fills, but a longer stratigraphic interval (Devonian-Upper Triassic) was analysed in order to get a broad understanding of what happened prior to, during and after deposition of the upper Permian-Lower Triassic successions. The ages of the sedimentary fills were partly constrained by well ties. Seismic reflectors and sedimentary successions below the upper Permian interval are of Late Devonianmid Permian age. Six sedimentary fill geometries (fill type A -F) were identified. These are (A) fault-ward thickening packages with internal strata thickening towards bounding faults, (B) wedge-shaped packages whose internal strata have more or less uniform thickness, (C) sedimentary fills containing fill type A overlain by sedimentary strata with more or less uniform thickness, (D) gently dipping packages that thicken towards deeper areas of the basin, and downlap onto pre-existing topography, (E) gently dipping strata filling depressions, and (F) sedimentary wedge with rotated internal strata and folded top. These fill types were used to determine phases of active tectonics and quiescent phases. Based on temporal changes of the fill types, five late Palaeozoic-Triassic unconformities have been mapped: a nonconformity where the Palaeozoic strata onlap onto the basement, a mid-Permian unconformity, two Early Triassic unconformities and a Middle Triassic angular unconformity. Results show that Devonian-Permian, mid-Permian, late-

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Seismic reflection characteristics and evolution of intrusions in the Qiongdongnan Basin: Implications for the rifting of the South China Sea

Cited by 30 publications

References 37 publications

Extension Discrepancy of the Hyper‐Thinned Continental Crust in the Baiyun Rift, Northern Margin of the South China Sea

Extension Discrepancy of the Hyper‐Thinned Continental Crust in the Baiyun Rift, Northern Margin of the South China Sea

Timing of the Miocene-Quaternary magmatic intrusions in the Tanga offshore basin: correlation to age equivalent deposits in the Eyasi-Wembere basin and their implications for petroleum potential

Permo–Triassic sedimentary fills and tectonic phases off Mid Norway: seismic investigation of the Trøndelag Platform

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