A ca. 2.2Ga Acidic Magmatic Event at the Northern Margin of the Yangtze Craton: Evidence from U‐Pb Dating and Hf Isotope Analysis of Zircons from the Kongling Complex

Xu, Di; Wei, Yunxu; Peng, Lianhong; Deng, Xin; Hu, Kun; Líu, Hao

doi:10.1111/1755-6724.13567

Cited by 3 publications

(7 citation statements)

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“…The third period records (1.80-1.50 Ga) is similar to that of sedimentary in the Shenlongjia, Dagushi and Suixian groups (1.4 Ga; Xiao, 2012;Li et al, 2016;Xu et al, 2016;Fig. 6.…”

Section: Timing and Provenance Of Metasedimentary Rockssupporting

confidence: 64%

“…The age spectra of detrital zircons from the Huwan complex is much similar with that of the Shenlongjia Group (Xiao, 2012;Li et al, 2016;Xu et al, 2016) in the Yangtze Block, but different with that of the Erlangping, Kuanping and Xiong'er groups in the northern Qinling belt and southern margin of the North China block. Thus, Paleoproterozoic rocks in the margin of the Yangtze Block might serve as the important provenance contributor to the sedimentary rocks in the Huwan complex.…”

Section: Timing and Provenance Of Metasedimentary Rocksmentioning

confidence: 81%

“…7. Relative age probability for detrital zircons from the metasedimentary rocks in the Huwan Complex.Ages of detrital zircon for Shennongjia Group in northwestern Yangtze Block are from Xiao (2012),Li et al (2016), andXu et al (2016). The data for Kuanping and Erlangping groups in the southern margin of the North China Block are fromLiu et al (2013).…”

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confidence: 99%

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Paleo‐ to Mesoproterozoic Tectono‐Magmatic Events Recorded in the Huwan Complex from the Dabie Orogen, Central China: Evidence from Petrology and U‐Pb Geochronology

Zhu

CHEN

Chen

et al. 2023

Acta Geologica Sinica (Eng)

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To better understand the Precambrian tectonic evolution of the Dabie Orogen in the northern margin of Yangtze Block, we present geochronological data for metasedimentary and metavolcanic rocks in the Huwan Complex. A total of 385 detrital zircon LA‐ICP‐MS analyses for metasedimentary rocks yielded three 207Pb/206Pb age populations: 1.50–1.80 Ga, 1.81–1.87 Ga and 1.93–2.0 Ga, providing a maximum depositional timing of ca.1.50 Ga; while metafelsic volcanic gneisses yielded protolith U‐Pb ages of 1893 ± 54 Ma. The peak ages are remarkably consistent with the tectonothermal events that occurred in the northern Yangtze Block, indicating the presence of Paleo‐ to Meso‐proterozoic magmatism in the Dabie Orogen. The age range of 1.93–2.0 Ga correlates with the Paleoproterozoic collision; the age range of 1.81–1.87 Ga coincides with the period of the post‐orogenic extension; and the age range of 1.50–1.80 Ga Ma is interpreted to associate with an extensional regime. Zircon cores with age of 1732–1965 Ma have εHf(t) values ranging from ‐11.70 to ‐2.47, indicating that juvenile crust involved in their magma sources. Owing to the similar age spectra, we proposed that the nucleus of the Dabie Orogen was close to the Yangtze Block since the Paleoproterozoic. The Huwan Complex has an intimate affiliation to the Yangtze Block. The Huwan complex was not only experienced the Paleo‐Tethys ocean subduction and collision, but also recorded Paleo‐ to Mesoproterozoic tectono‐magmatic events in the Dabie Orogen.

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“…The third period records (1.80-1.50 Ga) is similar to that of sedimentary in the Shenlongjia, Dagushi and Suixian groups (1.4 Ga; Xiao, 2012;Li et al, 2016;Xu et al, 2016;Fig. 6.…”

Section: Timing and Provenance Of Metasedimentary Rockssupporting

confidence: 64%

Section: Timing and Provenance Of Metasedimentary Rocksmentioning

confidence: 81%

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Paleo‐ to Mesoproterozoic Tectono‐Magmatic Events Recorded in the Huwan Complex from the Dabie Orogen, Central China: Evidence from Petrology and U‐Pb Geochronology

Zhu

CHEN

Chen

et al. 2023

Acta Geologica Sinica (Eng)

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“… Probability density plots of detrital zircon age. (a) Data of the Shennongjia Group (H. Li et al., 2013; Xiao, 2012; D. Xu et al., 2016; J. Wang et al., 2013; this study). (b–c) Data of SW Laurentia (Mulder et al., 2017).…”

Section: Discussionmentioning

confidence: 85%

“…Probability plots of detrital zircon age. (a) Data of the Shennongjia Group (H Li et al, 2013;Xiao, 2012;D. Xu et al, 2016;J.…”

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confidence: 99%

New Paleomagnetic Results From the Late Mesoproterozoic Luanshigou Formation, Shennongjia Group in South China and Their Implications for the Pre‐Grenvillian Connections Between South China Blocks and Southwestern Laurentia

Liu,

Zhang,

et al. 2024

JGR Solid Earth

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The identification of the Grenvillian‐age ophiolite suites in the Yangtze block in recent years suggested that the northern Yangtze subblock (NYB) and the southern Yangtze subblock (SYB) were once separated by an ocean in late Mesoproterozoic. Although some paleogeographic models advocated the Pre‐Grenvillian connections between the south China blocks and Laurentia, none of them has been paleomagnetically tested. Here we report the new paleomagnetic results obtained from the ∼1,270 Ma purplish‐red muddy dolomite beds of the Luanshigou Formation, Shennongjia Group, NYB, providing new constraints for reconstructing the paleogeographic positions of the south China blocks in late Mesoproterozoic. A total of 447 samples underwent stepwise thermal demagnetization. Two components were identified. The low‐temperature component is interpreted as the recent viscous remnant magnetization. The high‐temperature component was obtained from 64 samples below 580°C and from 177 samples below 690°C, directed northeast‐up or southwest‐down, antipodally, positioning the paleomagnetic pole at 18.5°S, 74.4°E (dm/dp = 2.5/1.6°). Rock magnetic results demonstrate that the magnetic carriers in purplish‐red dolomite and pale‐pink dolomite are predominated by hematite and magnetite, respectively. The data quality is supported by an inverse baked contact test, a B‐class reversal test, and the paleomagnetic pole is distinct from any younger poles of the region. Based on the paleomagnetic results, aided by geological evidence, we propose a reconstruction in which the NYB was juxtaposed to southwestern Laurentia in the late Mesoproterozoic and suggest that the late Mesoproterozoic Miaowan‐Shimian ophiolite zone in the Yangtze block was likely an extension of the Grenville belt of Laurentia.

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Internal versus external locations of the South China Craton within Rodinia during the Cryogenian: Provenance history of the Nanhua Basin

et al. 2020

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Contrasting models for internal versus external locations of the South China Craton (SCC) in the supercontinent Rodinia and associated mantle plume or ocean subduction dominated tectonic processes can be resolved by detrital zircon U-Pb dating and Lu-Hf isotopic analyses on the Cryogenian Nanhua Supergroup in the central SCC. Our results show that samples from the lower Liantuo, Tiesi’ao, and Datangpo formations of the Nanhua Supergroup show three age peaks at 2.50 Ga, 2.05 Ga, and 0.85 Ga, and those of the upper Nantuo Formation yield four peaks at 2.50 Ga, 2.05 Ga, 0.85 Ga, and 0.65 Ga. The Archean and Paleoproterozoic (1.80−2.10 Ga) zircons have εHf(t) values of −16.3 to +4.7 and −23.0 to +4.2, and may be sourced from the Kongling and Douling complexes and Paleoproterozoic intrusions in the northern Yangtze Block, respectively. Early Neoproterozoic (0.70−0.96 Ga) zircon grains show variable εHf(t) values of −20.0 to +15.0. In combination with the absence of Mesoproterozoic detrital zircons in the Nanhua Supergroup, huge volumes of Neoproterozoic granitic intrusions in the northern Yangtze Block are the potential sources for the 0.70−0.96 Ga detrital zircons. Only the siltstone of the Nantuo Formation has late Neoproterozoic (0.63−0.69 Ga) detrital zircons with high and positive εHf(t) values (+7.9 to +9.4). Several granitoid intrusions (0.63−0.68 Ga) in the Wudang and Ankang uplift of the South Qinling belt in the northern Yangtze Block provide the late Neoproterozoic detrital zircons of the Nantuo Formation. These provenance analyses of the Nanhua Supergroup indicate an interior source from the SCC, rather than an exterior source from the Laurentia and Australia cratons. The Neoproterozoic rift basins and magmatic rocks in the SCC were produced by secular episodic subductions and back-arc extensions, rather than a Neoproterozoic super-mantle plume. The SCC occupied a peripheral position adjacent to northern India in Rodinia during the Neoproterozoic. These conclusions will promote our understanding of genetic mechanism and distribution prediction of the several Cryogenian−Cambrian black-shale layers and excellent source rocks in the SCC.

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A ca. 2.2Ga Acidic Magmatic Event at the Northern Margin of the Yangtze Craton: Evidence from U‐Pb Dating and Hf Isotope Analysis of Zircons from the Kongling Complex

Cited by 3 publications

References 3 publications

Paleo‐ to Mesoproterozoic Tectono‐Magmatic Events Recorded in the Huwan Complex from the Dabie Orogen, Central China: Evidence from Petrology and U‐Pb Geochronology

Paleo‐ to Mesoproterozoic Tectono‐Magmatic Events Recorded in the Huwan Complex from the Dabie Orogen, Central China: Evidence from Petrology and U‐Pb Geochronology

New Paleomagnetic Results From the Late Mesoproterozoic Luanshigou Formation, Shennongjia Group in South China and Their Implications for the Pre‐Grenvillian Connections Between South China Blocks and Southwestern Laurentia

Internal versus external locations of the South China Craton within Rodinia during the Cryogenian: Provenance history of the Nanhua Basin

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