Neoproterozoic bimodal volcanic rocks and granites in the western Dabie area, northern margin of Yangtze block, China: implications for extension during the break-up of Rodinia

Zhu, Jiang; Wu, Bo; Wang, Lian-Xun; Peng, Sanguo; Zhou, Hanwen

doi:10.1080/00206814.2018.1512058

Cited by 10 publications

(4 citation statements)

References 70 publications

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“…740 Ma) of the Dingyuan Formation, which has been considered as a characteristic magmatic event for the Yangtze Block (Yang et al, 2016), have also been observed in the to the north of the Huwan complex (shown in Fig. 1; Zhu et al, 2019bZhu et al, , 2021. Based on these geological features, we propose that the Huwan complex should be intimately affiliated to the Yangtze Block.…”

Section: Tectonic Characteristics Of the Huwan Complex 631 Is The Huw...mentioning

confidence: 70%

“…The Yangtze Block consists mainly of Precambrian rocks with sporadic outcrops of Archean rocks. Widespread Neoproterozoic magmatic events are recorded in the northwestern and northern margins of the Yangtze Block, and are related to the evolution of the supercontinent Rodinia (Chen Z et al, 2006;Ling et al, 2008;Zhang et al, 2015;Luo et al, 2018;Zhu et al, 2019aZhu et al, , b, 2021. Pre-Neoproterozoic outcrops in the Yangtze Block are relatively scarce and are found to be mainly scattered in the Houhe, Kongling, Douling, and Dongling complexes (Zhang B B et al, 2006;Zheng et al, 2006;Peng et al, 2009Peng et al, , 2012Chen et al, 2013;Chen and Xing, 2016;Qiu et al, 2017;Zhang Q Q et al, 2020).…”

Section: Geological Settingmentioning

confidence: 99%

“…This orogen is characterized by UHP eclogite-facies metamorphic rocks that were produced by the Triassic continental collision in central China (Hacker et al, 2000;Zheng et al, 2003Zheng et al, , 2009Wu and Zheng, 2013). Outcrops of ancient crustal rocks are exposed in the belt, such as the Huangtuling gneiss and the Tuanfeng migmatites with protolith ages of approximately 2.8 Ga (Chen N et al, 2006;Sun et al, 2008;Qiu et al, 2020a), the Neoarchean Muzidian tonalitic gneisses with protolith ages of 2.5-2.4 Ga (Qiu et al, 2021), and Neoproterozoic metagranites derived from volcanic events dating between 760-720 Ma (Zheng et al, 2004;Zhang et al, 2015;Zhu et al, 2019aZhu et al, , b, 2021. Intensive Cretaceous magmatism occured in the Dabie Orogen, triggering by the tectonic collapse of the thickened crust (Ma et al, 1998(Ma et al, , 2004Zhao et al, 2007Zhao et al, , 2008Xu et al, 2012).…”

Section: Geological Settingmentioning

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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Section: Tectonic Characteristics Of the Huwan Complex 631 Is The Huw...mentioning

confidence: 70%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

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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“…As for the tectonic setting, there are differing interpretations of the magmatic activity in 700-800 Ma, specifically whether it is related to island arc in a subduction environment or extension in a rift environment. Many recent researches on the Dingyuan Formation igneous rock in the North Huaiyang belt of Dabie Mountain suggests that it is a product of cracking [12,14], and belongs to the Neoproterozoic. But there is limited evidence from other areas.…”

Section: Introductionmentioning

confidence: 99%

Discovery and geological significance of the Neoproterozoic bimodal intrusive rocks in Dabie Orogen

Li,

Hu,

Kong

et al. 2023

Preprint

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In Mingshan reservoir of Dabie Orogenic Belt, there is a collection of Neoproterozoic bimodal intrusive rock formations. This study focuses on the zircon U-Pb chronology, rock geochemistry, and Hf isotopes of these formations. The findings reveal that: (1) The bimodal intrusive rocks mainly consist of gneissic monzogranite and biotite-bearing plagioclase amphibolite, with zircon U-Pb ages of 785.0 ± 7.1Ma and 787.3 ± 6.1Ma, respectively. These ages indicate that they were formed during the late Qingbaikou to early Nanhua epoch of the Neoproterozoic era. (2) The monzonitic granite in the peraluminous series displays a strong right deviation of LREE (Light Rare Earth Elements) and relatively flat HREE (Heavy Rare Earth Elements), as well as a negative δEu anomaly. It is enriched in elements like Rb, Ba, and K, while slightly depleted in elements like Nb, Sr, P, and Ti, similar to Al-type granite. The plagioclase-hornblende rock belongs to the metaluminous peraluminous, shoshonitic, and calc-alkaline series. It has a Mg# (molar ratio of Mg to Mg + Fe) of 0.15 ~ 0.25 and is enriched in LIL (Large Ion Lithophile) elements such as Rb, Ba, and K, with a slight positive anomaly of Ba, and depleted in Nb and Sr. (3) The monzogranite exhibits values of εHf(t) (epsilon Hafnium) ranging from − 13.4 to -7.2 (all negative), and tDM2(Hf) (two-stage depleted mantle model age) ranging from 2099 to 2298Ma. The amphibolite shows εHf(t) values ranging from 2.9 to 5.7 (all positive), and tDM2(Hf) ranging from 1257 to 1410Ma. The geochemistry and Hf isotopes indicate that the gneissic monzogranite and biotite-bearing plagioclase amphibolite have different magmatic sources. The mafic rocks originated from a depleted mantle and underwent fractional crystallization and strong crustal contamination. On the other hand, the acidic rocks resulted from partial melting of shallow ancient felsic crust due to the heating or upwelling of the mafic rocks. Taking into account regional correlation, the Middle Neoproterozoic bimodal intrusive rocks were formed in the structural setting of an intraplate extensional zone (incipient rift).

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Discovery of the mid-Cretaceous sedimentary rocks from the ultrahigh-pressure terrane, Dabie Orogenic Belt, and its tectono-paleogeographic implications

Li¹,

Xie²,

Wei³

et al. 2023

Journal of Palaeogeography

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Neoproterozoic bimodal volcanic rocks and granites in the western Dabie area, northern margin of Yangtze block, China: implications for extension during the break-up of Rodinia

Cited by 10 publications

References 70 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

Discovery and geological significance of the Neoproterozoic bimodal intrusive rocks in Dabie Orogen

Discovery of the mid-Cretaceous sedimentary rocks from the ultrahigh-pressure terrane, Dabie Orogenic Belt, and its tectono-paleogeographic implications

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