Distinct tectono-magmatism on the margins of Rodinia and Gondwana

Wu, Guozhong; Chu, Xu; Tang, Ming; Li, Weiyong; Chen, Fukun

doi:10.1016/j.epsl.2023.118099

Cited by 10 publications

(10 citation statements)

References 92 publications

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“…After the cratonization of the NCC, the magmatic and volcanic activities associated with extension are most active in the southern margin during the period time of 1.8–1.6 Ga. From the statistical data of A-type granite, numerous granites with A-type geochemical features were produced by the partial melting of the thinned lower crust, supporting a continuous thinning process of the crust. ,, The newly reported A-type granites in the BJS and LWZ region are located in the southern margin of the NCC and formed in an extensional tectonic setting at 1.8–1.6 Ga, which may constrain the initial breakup time of the Columbia supercontinent. Meanwhile, associated with coeval A-type granites, volcanic rocks, and mafic dyke swarms, the BJS and LWZ granites can well indicate extensional tectonic events.…”

Section: Discussionmentioning

confidence: 99%

Late Paleoproterozoic Breakup Event in the Southern Margin of the North China Craton: Evidence from A-Type Granites

Chen,

Yang,

Tian

et al. 2024

ACS Earth Space Chem.

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The late Proterozoic tectonic evolution of the North China Craton (NCC) has long been a matter of debate, and A-type granites in the region can provide valuable constraints for resolving this issue. In this paper, the Baojiashan and Longwangzhuang granites from the southern margin of the NCC were studied using a combination of LA-ICP-MS zircon U−Pb dating, Hf−Nd isotopic analyses, and whole-rock geochemical analyses to constrain their magmatic ages and sources. The Baojiashan and Longwangzhuang granites yield intrusion 207 Pb/ 206 Pb ages of 1803 ± 29 and 1607 ± 21 Ma, respectively. They show significant geochemical similarities to the A-type granites, with high SiO 2 and K 2 O content, high FeO T /(FeO T + MgO) and 10,000 Ga/Al ratios, strong Eu-negative anomaly, and high zircon saturation temperature (813−982 °C). Among them, the Baojiashan granites display a lower Nb/Ta ratio and a higher Y/Nb ratio, consistent with the characteristics of A 2 -type granites. Longwangzhuang granites exhibit opposite ratios of the above, following the characteristics of A 1 -type granites. The zircon ε Hf (t) values (−6.5 to −3.0) and ε Nd (t) values (−6.7 to −2.4) of both are similar, and the second-stage model ages (T DM2 ) are 2588−2730 and 2462−2953 Ma, indicating that they mainly originated from the partial melting of the Neoarchean crust. Combined with previous analytical results, the southern margin of the NCC experienced a process of postorogenic extension toward intracontinental rift at 1.8−1.6 Ga and represents a response to the breakup of the Columbia supercontinent.

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Section: Discussionmentioning

confidence: 99%

Late Paleoproterozoic Breakup Event in the Southern Margin of the North China Craton: Evidence from A-Type Granites

Chen,

Yang,

Tian

et al. 2024

ACS Earth Space Chem.

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“…Previous studies have shown that the complex magmatic During the Mesoproterozoic-Neoproterozoic Grenvillian Orogeny (1.3-0.9 Ga), the residual fragments of the Columbia supercontinent that were not completely disintegrated converged to form the Rodinia supercontinent (Fig. 7b) (Cawood, 2020;Zhang et al 2020b;Wu et al 2023). The Grenvillian Orogeny (1.3-0.9 Ga) is extensively recorded in both Laurentia and Gondwana (Fig.…”

Section: B Sediment Sourcesmentioning

confidence: 91%

“…According to palaeomagnetic, fossil and detrital zircon data during the early Palaeozoic, the South China Block, Tarim Block, North Qiangtang Terrane and Indochina Block were located close to each other. They are collectively referred to as the North Vietnam-South China and these microcontinents divide the Palaeo-Tethys Ocean into several narrow basins (Duan et al 2011;McKenzie et al 2011;Metcalfe, 2013;Xu et al 2013;Zhou et al 2015a;Chen et al 2016;Lee et al 2016;Han et al 2016;Wang et al 2016;Zhao et al 2017Zhao et al , 2018Liu, 2020;Wu et al 2023). Therefore, the closure of the Proto-Tethys Ocean has stages, and its sutures are characterized by multiple zones, such as Truong Son, Changning-Menglian and Jinshajiang-Diancangshan-Ailaoshan structural zones (Fig.…”

Section: Introductionmentioning

confidence: 99%

The affinity of microcontinents in northern East Gondwana in the Silurian: Hainan Island response to the closure of the Proto-Tethys Ocean

Gao,

Xu,

Kong

et al. 2024

Geol. Mag.

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During the existence of Proto-Tethys Ocean (550–430 Ma), microcontinents in northern East Gondwana merged with the northern margin of India-Australia, completing the assembly of Gondwana. Ongoing controversy surrounds the disappearance of the Proto-Tethys Ocean, the dynamic mechanisms of suturing and the palaeogeographic relationships among microcontinents in northern East Gondwana, contributing to the uncertainty about the tectonic evolution of the region. This paper concerns the lower Silurian Zusailing Formation in the Hainan Island and focuses on the affinity between Hainan Island and various microcontinents in northern East Gondwana during the early Silurian. We use detrital zircon geochronology to reconstruct the closure process of the Proto-Tethys Ocean and show that the detrital zircon U–Pb age groups of the lower Silurian Zusailing Formation are 2800–2200, 2100–1350, 1250–950, 600–480 and 480–430 Ma, with a significant age peak of ca. 449 Ma. Furthermore, the analysis of detrital zircon geochemistry and europium anomalies shows that the Hainan Island crust continued to thicken during 600–434 Ma. Comparing the age spectrum of early Palaeozoic detrital zircons from Hainan Island and various microcontinents in northern East Gondwana, as well as the affinity among them during the Silurian, we conclude that the closure of the eastern Proto-Tethys Ocean evolved from unidirectional subduction (600–480 Ma) to bidirectional subduction (480–430 Ma).

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“…cluding (1) 830-735 Ma and 660-630 Ma granitoids [17,37]; (2) ~800 Ma mafic-ultramaficcarbonatite complexes [44]; (3) 760 Ma and 735 Ma bimodal intrusive complexes [45], and (4) 820 Ma, 780-770 Ma and 660-630 Ma mafic dyke swarms [23,46]. The Neoproterozoic extensive magmatism and metamorphism in the Tarim Craton were previously proposed to be global-scale tectonothermal events related to the assembly and breakup of Rodinia [16,30].…”

Section: Geological Settingmentioning

confidence: 99%

“…Widespread and diverse magmatism with main episodes of ca. 820-800 Ma and ca.780-750 Ma, as a response to the protracted fragmentation of the Rodinia, have been well-documented in the Tarim Craton [16]. By contrast, less attention has been paid to late Cryogenian-Ediacaran magmatism in the area.…”

Section: Introductionmentioning

confidence: 99%

Late Cryogenian Circum-Rodinia Syn-Subduction Extension: Insights from Highly Fractionated S-Type and A-Type Granitoids in the Northern Tarim Craton

Biedilihan,

Abuduxun,

Huang

et al. 2023

Minerals

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Late Cryogenian–Ediacaran magmatism represents the latest Precambrian tectonothermal event in the Tarim Craton. However, its geodynamic setting and geological significance are controversial. Here, we report the geochronology, whole-rock geochemistry, and Sr-Nd-Hf isotopic compositions of newly identified late Cryogenian A-type and highly fractionated S-type granites from two locations in the northern Tarim Craton. LA-ICP-MS zircon U-Pb analyses yield ages of 642 ± 7 Ma for a syenogranite and 643 ± 4.5 Ma for a mylonitized granite. The syenogranite is weakly peraluminous and shows an A-type granite affinity, as indicated by its high K2O + Na2O contents (8.35–8.64 wt.%), high field strength elements (Zr + Nb + Ce + Y = 435.8 − 463.4 × 10−6), Ga/Al ratios (2.79−2.83), and zircon saturation temperatures (829–844 °C). In contrast, the mylonitized granite contains Al-oversaturated minerals (e.g., garnet) and has high a differentiation index (DI = of 98.9–99.4), with lower zircon saturation temperatures (786–792 °C); the samples display high SiO2 contents (72.99–74.00 wt.%) and A/CNK values (1.16–1.17) and low Nb/Ta and Zr/Hf ratios and are enriched in Rb and depleted in Ba, Sr, which all point to a highly fractionated S-type granite affinity. The granites are characterized by elevated large-ion lithosphere elements (LILEs) and flat high-field-strength elements (HFSEs) patterns, with deep Nb and Ta troughs and pronounced negative Eu anomalies (Eu/Eu* = 0.17–0.38). They show apparently negative εNd(t) values (−10.1 to −9.8 and −6.8 to −7.9, respectively) and εHf(t) values (−9.66 to −1.77 and −33.5 to −1.3, respectively) with Paleoproterozoic crustal model ages, indicating that they were mainly generated by the partial melting of mature crustal materials with a minor contribution from a mantle-derived magmatic source. By integrating with previously published geological, sedimentological, and structural data, we suggest that the granites formed due to a high-temperature gradient in a syn-subduction extensional setting that was probably induced by northward slab rollback of the Paleo-Asian Oceanic lithosphere. Our new data highlight an upper-plate extension in the northern Tarim Craton that constitutes the northern periphery of the Rodinia supercontinent. The linear distribution of late Cryogenian magmatic rocks provides critical evidence for the orogen strike extension of the terminal suture between the Tarim Craton and southwestern Altaids.

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Distinct tectono-magmatism on the margins of Rodinia and Gondwana

Cited by 10 publications

References 92 publications

Late Paleoproterozoic Breakup Event in the Southern Margin of the North China Craton: Evidence from A-Type Granites

Late Paleoproterozoic Breakup Event in the Southern Margin of the North China Craton: Evidence from A-Type Granites

The affinity of microcontinents in northern East Gondwana in the Silurian: Hainan Island response to the closure of the Proto-Tethys Ocean

Late Cryogenian Circum-Rodinia Syn-Subduction Extension: Insights from Highly Fractionated S-Type and A-Type Granitoids in the Northern Tarim Craton

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