Detrital zircon U-Pb dating in the southern Hefei Basin: Evidence for exhumation of HP-UHP rocks of the Dabie Orogen

Wang, Yongsheng; Bai, Qiao; Tian, Ziqiang; Du, Hui

doi:10.1007/s11430-019-9565-3

Cited by 9 publications

(11 citation statements)

References 58 publications

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“…All ages are displayed on the KDEs and histograms with a fixed 20 Ma kernel density estimate bandwidth with labeled modal age peaks. Published data sources for the Lower Jurassic basins peripheral to the Dabie orogen are: Grimmer et al., 2003; C. Li & Hu, 2022; R. Li et al., 2005; She et al., 2012; Y. Wang et al., 2009, 2020; J. Yang et al., 2010; Y. Zhang et al., 2017; Zhu et al., 2017.…”

Section: Discussionmentioning

confidence: 99%

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Sedimentological Evidence for Pre‐Early Permian Continental Subduction in the Dabie Orogen, Central‐East China

Deng,

Hu,

Chew

et al. 2024

Tectonics

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How to constrain the onset of continental subduction and prograde metamorphism in an orogen remains a fundamental question. The widespread Triassic ultrahigh‐pressure (UHP) metamorphic rocks in the Dabie orogen in central‐east China are generally attributed to continental subduction. The earliest Triassic peripheral basins (the Huangshi, Yueshan and Nanjing basins) around the Dabie orogen represent an ideal archive to reconstruct the early evolution of the orogen. Here we present a multidisciplinary provenance study on these Triassic strata, including framework petrography and heavy mineral analyses combined with U‐Pb age and trace‐element analyses of detrital zircon, rutile and apatite. The abundant metapelitic lithics and muscovite grains, a heavy mineral population dominated by metamorphic apatite, and a significant Permian (270–290 Ma) age peak from U‐Pb age spectra of detrital zircon, rutile and apatite imply an Early Permian medium‐high grade metamorphic source in the uppermost structural levels of the Dabie orogen. Our provenance data indicate that the onset of northward continental subduction of the South China Block commenced no later than the Early Permian (c. 290 Ma). This event is clearly earlier and distinct from the more widespread Triassic UHP metamorphism of the Dabie orogen, suggesting that continental subduction and mountain‐basin interaction were protracted processes (>55 Myr, c. 290–235 Ma). When combined with other geological evidence, our results show that the prolonged continental subduction is not always preceded by subduction of oceanic crust.

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Section: Discussionmentioning

confidence: 99%

“…Published data sources for the Lower Jurassic basins peripheral to the Dabie orogen are:Grimmer et al, 2003;C. Li & Hu, 2022;She et al, 2012;Y. Wang et al, , 2020J.…”

mentioning

confidence: 99%

Sedimentological Evidence for Pre‐Early Permian Continental Subduction in the Dabie Orogen, Central‐East China

Deng,

Hu,

Chew

et al. 2024

Tectonics

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“…Detrital zircon U–Pb ages (7941 grains) from pre‐Jurassic sedimentary and metasedimentary units from, or adjacent to the Dabie orogen are summarised here to evaluate their relationship to the Lower Jurassic strata as potential correlatives or source units (Figure 11). Detrital mineral U–Pb or Ar/Ar age data are grouped in one composite KDE for each basin in Figure 11, and also incorporate previously published detrital zircon U–Pb and phengite Ar/Ar ages (1339 zircon grains and 112 phengite grains) from Lower Jurassic units (Grimmer et al., 2003; Li et al., 2005; Li & Hu, 2022; She et al., 2012; Wang et al., 2009, 2020; Yang et al., 2010; Zhang et al., 2017; Zhu, Wang, et al., 2017) to evaluate their similarity and the relative contribution of each source area to the Lower Jurassic basins.…”

Section: Discussionmentioning

confidence: 99%

“…Li et al (2005) interpreted the predominance of the 1.7-1.9 Ga zircons as indicative of a NCC source, because this age is characteristic of the NCC basement. By contrast, Wang et al (2020) suggested that 1.8-2.0 Ga zircons were sourced from the south from the SuSong Complex in the Dabie orogen, based on the generally similar zircon ages of the Fanghushan Formation gravels and the rocks of the SuSong Complex (Figure 11). Our data support the latter view, particularly because the Fanghushan Formation has abundant Neoproterozoic zircon grains which are unique to the SCB, while the NCC almost entirely lacks zircon of this age.…”

Section: Hefei and Nanjing Basinsmentioning

confidence: 99%

Early Jurassic initiation of the modern drainage pattern of the Dabie orogen (East China) revealed by a multi‐proxy provenance approach

Deng,

Hu,

Chew

et al. 2023

Basin Research

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The timing of the initiation of the present‐day tectonic architecture and drainage systems in eastern China remains debated. This study presents a comprehensive provenance study of the Early Jurassic peripheral basins surrounding the Dabie orogen including framework petrography, heavy‐mineral analysis, single‐grain chronology and chemistry. Clasts of high‐grade schist, muscovite grains, rare gneissic fragments, abundant metamorphic garnet and phengite (Si > 3.3 pfu), combined with a main 216–256 Ma rutile U–Pb population found in these Early Jurassic sandstones, indicate a source from the Triassic (U)HP belt in the Dabie orogen. Sedimentary lithics and ultra‐stable heavy‐mineral assemblages indicate an additional source of recycled sedimentary rocks. Combined with the continuous shift of the youngest detrital rutile age population toward younger ages toward the north that mimics the pattern of metamorphic bedrock ages in the Dabie orogen, we infer that the present surface tectonic architecture and paleodrainage patterns of the Dabie orogen were established in the Early Jurassic. Thus, the Early Jurassic exhumation of the Dabie orogen marked the development of the watershed between Northern and Southern China, namely the Huai River and several principal tributary systems of the middle‐lower Yangtze River.

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“…Radiocarbon dating methods-key methods which are currently being used -have significant analytical limitations. These approaches may therefore result in significant chronological uncertainty for stratum, hampering a direct comparison with historical data [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. However, because this dating method has age limitations, after obtaining the approximate age, it is necessary to analyze the geological evolution law together with other testing methods.…”

Section: Introductionmentioning

confidence: 99%

Terahertz Dating of Sedimentary Rocks

et al. 2022

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The depositional products of sedimentary rocks provide vital references for investigating the paleoenvironment, paleogeography, and tectonic evolution history. However, the detection methods of geological evolution are still relatively complicated, and how to combine geological age and geological evolution is confusing. Based on the sensitivity of terahertz waves to organic matter, a THz dating method was introduced for characterizing the geological age of sedimentary rocks. In this study, the geological evolution of Liujiang Basin was analyzed by using terahertz time domain spectroscopy (THz-TDS). According to the close relation between organic matter content and sedimentary environment, it can be inferred that the geological deposition in this area is affected by Marine cover. In addition, the refractive index of Ordovician sedimentary rocks is significantly higher than that of other sedimentary rocks. Based on these results, it is inferred that the sedimentary environment of the Liujiang Basin gradually changed from continental deposition to deep-water marine deposition from the Neoproterozoic to the Ordovician, and the sea water gradually retreated due to the crustal movement, resulting in a transition from deep-water deposition to continental inshore ocean facies deposition. These findings are highly consistent with the geological history of the study area. Combined with principal component analysis (PCA) technology, the relative geological age of sedimentary rocks can be divided. Our study con-firmed the reliability of this THz dating technique, which provides an effective way to study the geological evolution history of sedimentary rocks.

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Detrital zircon U-Pb dating in the southern Hefei Basin: Evidence for exhumation of HP-UHP rocks of the Dabie Orogen

Cited by 9 publications

References 58 publications

Sedimentological Evidence for Pre‐Early Permian Continental Subduction in the Dabie Orogen, Central‐East China

Sedimentological Evidence for Pre‐Early Permian Continental Subduction in the Dabie Orogen, Central‐East China

Early Jurassic initiation of the modern drainage pattern of the Dabie orogen (East China) revealed by a multi‐proxy provenance approach

Terahertz Dating of Sedimentary Rocks

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