Detrital zircons record the evolution of the Cathaysian Coastal Mountains along the South China margin

Chen, Yan; Meng, Jun; Líu, Hao; Wang, Chengshan; Tang, Ming; Liu, Tao; Zhao, Yinan

doi:10.1111/bre.12636

Cited by 18 publications

(6 citation statements)

References 66 publications

(97 reference statements)

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“…The 206 Pb/ 238 U weighted mean eruption/deposition age from 51 spot analyses is 106.6 ± 0.3 Ma (Figures 4b and Table S1 in Supporting Information S1), which is compatible with the late‐Early Cretaceous age based on ostracoda and charophyte fossils (Wang, et al., 1991), sporopollen assemblages (Huang & Long, 2008), and the youngest detrital zircon age (∼120 Ma; Jiang et al., 2015) obtained from the Lumuwan Formation in the Ledong‐Baisha area. The youngest detrital zircon ages in Lumuwan red beds are 105.7 ± 2 Ma in Baisha (19.4°N, 109.7°E) and 108.3 ± 2.8 Ma in Qionghai (19.1°N, 110.4°E; Chen et al., 2021), which are compatible with the tuff age of 106.6 ± 0.3 Ma in Ledong.…”

Section: Geochronologysupporting

confidence: 54%

Remagnetization Age and Mechanism of Cretaceous Sediments in Relation to Dyke Intrusion, Hainan Island: Tectonic Implications for South China and the Red River Fault

Meng

Gilder

et al. 2022

JGR Solid Earth

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Hainan Island lies near the Red River Fault, a prominent tectonic feature produced by the India‐Asia collision. There, we carried out a geochronologic and paleomagnetic study on Cretaceous rocks in order to better understand the kinematic history of the region. U‐Pb zircon dating of tuff intercalated in red bed sedimentary rocks yielded a concordant age of 106.6 ± 0.3 Ma; a mafic dyke intruding the red beds yielded a concordant age of 104.6 ± 0.7 Ma. Stepwise demagnetization experiments on 448 sedimentary rock samples and 191 dyke samples isolate solely normal polarities. Paleomagnetic directions of the dykes cluster in two distinct populations in geographic coordinates, indicating that dyke intrusion occurred in two pulses of limited duration (secular variation was not averaged) after tilting of the sediments. Baking of the sediments from the dykes only occurred near the contacts. Together with published data, the mean directions of 104 sites most tightly group at 58.3 ± 3.2% unfolding, indicative of a synfolding remagnetization, which can be constrained to have occurred within a 2 Myr period between sedimentation and dyke intrusion. We suggest that warm (50–100°C) fluid interaction during basin development led to new mineral growth spawning chemical remagnetization. The corresponding paleomagnetic pole at 81.5°N, 145.2°E (A95 = 2.4°) is indistinguishable from the coeval Eurasian reference pole, suggesting the South China Block has remained fixed to Eurasia since 105 Ma. A contour map of paleomagnetic rotations from 115 studies in the region shows that the Red River Fault roughly demarcates rotation magnitudes/signs, suggestive of a major tectonic boundary.

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Section: Geochronologysupporting

confidence: 54%

Remagnetization Age and Mechanism of Cretaceous Sediments in Relation to Dyke Intrusion, Hainan Island: Tectonic Implications for South China and the Red River Fault

Meng

Gilder

et al. 2022

JGR Solid Earth

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“…This inference of the pre‐Oligocene coastal mountains is also supported by palaeo‐altimetric reconstructions and palaeo‐drainage evolution studies. Palaeocurrent and detrital provenance studies of Late Cretaceous and Palaeogene fluvial deposits in sedimentary basin located east and west of the modern coast suggested a drainage system originating from the coastal mountains (Chen et al, 2022; Tian et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Eocene to present evolution of the Pearl River, China: A quantitative provenance interpretation on large detrital zircon U–Pb geochronological data

Tian

Zhang

et al. 2023

Basin Research

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Drainage evolution of the Pearl River, one of the major rivers in the eastern margin of the Asian continent, has important implications for the tectonomorphic evolution of the northern margin of the South China Sea and the southeastern Tibetan Plateau. Previous reconstructions using different methods suggested discrepant timings for the formation of river, ranging from Early Oligocene to Middle Miocene. Here, we address this heavily debated topic using quantitative unmixing modelling of detrital zircon data from the Pearl River Mouth Basin in the northern margin of the South China Sea. In this study, we develop a novel approach for estimating the relative contributions of detrital zircon sources to their shared sink, and propose to use the correlation coefficients among zircon contribution models to evaluate the trade‐off among sources with similar age spectra, to avoid the potential overinterpretation of individual contributions. Our new method is applied to new (997) and published detrital zircon U–Pb data from offshore boreholes and modern Pearl River samples to quantitatively interpret and reconstruct the sediment provenance of the Pearl River Mouth Basin and the development of the Pearl River. Our findings reveal that the provenance change of the Pearl River Mouth Basin can be divided into three main stages. Eocene sediments were mainly sourced in the intra‐basinal highlands and the eastern coastal tributaries, indicating a local drainage system. Early Oligocene provenances extended westward, as shown by the increase in sediment contribution from the central and western parts of the Pearl River (28% in total). Since the Late Oligocene, the eastern, central and western parts of the modern Pearl River have contributed equal amounts of zircons to the Pearl River Mouth Basin, indicating the establishment and long‐term stability of the modern‐like drainage system, as highlighted by our new data acquired from the borehole Miocene strata. The Late Oligocene westward expansion of the Pearl River is consistent with the timing of the coeval breakup and spreading of the South China Sea and the intensified Asian monsoon precipitation, highlighting the importance of base level fall and climate in controlling the drainage evolution.

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“…Afterward the Okhotomorsk Block drifted northward and collided with the Siberian Craton at ∼80 Ma (Suo et al., 2020; Yang, 2013), the subduction zone of the paleo‐Pacific Plate also retreated eastward during the Late Cretaceous (Li et al., 2019), and Southeast China underwent regional extension (Suo et al., 2019). This tectonic setting is not favorable for the maintenance of such a high range, but the coastal mountains were still >2 km high during the Late Cretaceous (Chen et al., 2022; Zhang et al., 2016).…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…Reconstructions suggested that a meridionally oriented mountain range had existed along the East Asian coast during the Late Cretaceous (Chen, 2000), and that it had attained an altitude of much more than 2 km in the early Late Cretaceous and became lower afterward (Chen et al., 2022; Zhang et al., 2016). Therefore, it is likely that the strong signal of orbital forcing in the Songliao Basin was due to the East Asian coastal mountains.…”

Section: Introductionmentioning

confidence: 99%

Coastal Mountains Amplified the Impacts of Orbital Forcing on East Asian Climate in the Late Cretaceous

Zhang,

Flögel,

et al. 2023

Geophysical Research Letters

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During the Cretaceous, there were two factors that had important influences on the East Asian climate, the East Asian coastal mountains and Earth's orbital cycling. An important question is how the coastal mountains modulated the variability of East Asian climate over orbital timescales. Here, we perform simulations with the coastal mountains of 0, 2, and 4 km high and three orbital configurations to answer the question. Our results show that a mountain range at the East Asian coast can amplify the impacts of orbital forcing on East Asian climate. Specifically, precipitation over the Songliao Basin in Northeastern China has significant changes as the coastal mountain range is about 4 km high. Combining our simulation results with orbitally‐controlled sedimentary deposits from the Songliao Basin, we conclude that the altitude of the coastal mountain range was very likely higher than 2 km in the Late Cretaceous.

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Detrital zircons record the evolution of the Cathaysian Coastal Mountains along the South China margin

Cited by 18 publications

References 66 publications

Remagnetization Age and Mechanism of Cretaceous Sediments in Relation to Dyke Intrusion, Hainan Island: Tectonic Implications for South China and the Red River Fault

Remagnetization Age and Mechanism of Cretaceous Sediments in Relation to Dyke Intrusion, Hainan Island: Tectonic Implications for South China and the Red River Fault

Eocene to present evolution of the Pearl River, China: A quantitative provenance interpretation on large detrital zircon U–Pb geochronological data

Coastal Mountains Amplified the Impacts of Orbital Forcing on East Asian Climate in the Late Cretaceous

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