The tectono-stratigraphic and magmatic evolution of conjugate rifted margins: Insights from the NW South China Sea

Chao, Peng; Manatschal, Giänreto; Chenin, Pauline; Ren, Jianye; Zhang, Cuimei; Pang, Xiong; Zheng, Jinyun; Li, Yang; Kusznir, Nick

doi:10.1016/j.jog.2021.101877

Cited by 17 publications

(41 citation statements)

References 91 publications

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“…Comparable conclusions were drawn from the study of high‐resolution reflection seismic sections in the South China Sea by Chao et al. (2021) and Luo et al. (2021), in the Porcupine Basin by Whiting et al.…”

Section: Building a Stratigraphic Model For Idealized Rifted Marginsmentioning

confidence: 83%

“…(2013) and Chao et al. (2021). Several field and seismic studies also provide good evidence for it (e.g.…”

Section: Discussionmentioning

confidence: 96%

“…In‐between the main necking fault systems, the keystone block (future hyperextended domains) seems to remain at shallow water depths during (part of) the necking phase, or to be even temporarily emergent. Illustrative examples include the early Jurassic karst of the Briançonnais (Section 4.2.2; Claudel & Dumont, 1999), Tithonian offshore shelf deposits at the Iberian hyperextended domain (Section 4.3.3; Mohn et al., 2015, and references therein), lack of deposition in the central part of the northwestern South China sea (Section 5.1.4 and Figure 9c; Chao et al 2021), shallow water deposits on the Halten Terrace at the mid‐Norwegian margin (Section 5.2.2; Bell et al., 2014), and basement subaerial exhumation at the Socotra margin (Section 5.3.2; Pik et al., 2013). The width of such necking‐related uplift is of the order of a few tens of kilometres (Figure 13b; Chenin et al., 2019, and references therein).…”

Section: Discussionmentioning

confidence: 99%

“…Here we focus on the CGN‐1 multichannel high‐resolution 2D seismic section, for which Chao et al. (2021) recently proposed a detailed tectono‐sedimentary interpretation and balanced kinematic restoration. To study the spatio‐temporal evolution of deformation during rifting, they grouped seismic packages of the same interpreted age along dip into one Sequence (S) .…”

Section: Application Of Our Model To Incompletely Calibrated Natural ...mentioning

confidence: 99%

“…At the southern margin, the hyperextended domain is affected by in-sequence, oceanwarddipping, low-angle detachment faults that root on one and the same décollement level (Figure 9b,b2). Based on these observations, Chao et al (2021) suggested that the southern margin is a lower plate. In contrast, the alternance of ramps and terraces shaping the northern margin tip the scales in favour of an upper plate.…”

Section: The Hyperextended Domainsmentioning

confidence: 99%

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The syn‐rift tectono‐stratigraphic record of rifted margins (Part II): A new model to break through the proximal/distal interpretation frontier

et al. 2021

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One fundamental lesson from the last decade's research into rifted margins is that stratigraphic horizons cannot be simply correlated from the proximal into distal domain, which makes the interpretation of poorly calibrated and largely inaccessible distal margins difficult. In this contribution, we propose a new tectono‐stratigraphic model to help break through the proximal/distal interpretation frontier. After reviewing the scientific advances on rifted margins achieved during the last century, we describe the primary spatio‐temporal evolution of active deformation during rifting. We show that different rift domains are associated with specific (1) periods of active deformation; (2) tectonic structures and related stratigraphic architecture; (3) amounts of accommodation creation owing to specific ranges of horizontal widening and vertical deepening and (4) depositional environments. We demonstrate that the sequential localization of extension during rifting results in a younging of the base of passive infill (i.e. sediment deposited in a non‐tectonic setting) oceanward. We propose a panel of few to few tens of My time intervals related to specific tectonic events—our Tectonic Sequences—that may be correlated more or less easily and continuously across rifted margins. This study underlines the value of an iterative approach between fieldwork on fossil rifted margins and offshore geophysical studies, where field studies offer easy‐to‐access and high‐resolution calibration of dismembered rifted margin remnants, while geophysical studies provide comparatively low‐resolution imaging of entire, intact but largely inaccessible, rifted margins. It also highlights the necessity of jettisoning outdated dogma on rifted margins and changing our routines when interpreting seismic sections and outcrops.

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Section: Building a Stratigraphic Model For Idealized Rifted Marginsmentioning

confidence: 83%

“…(2013) and Chao et al. (2021). Several field and seismic studies also provide good evidence for it (e.g.…”

Section: Discussionmentioning

confidence: 96%