Back-arc system formation and extinction in the southern Central Asian Orogenic Belt: New constraints from the Faku ophiolite in north Liaoning, NE China

Shi, Yi; Shi, Shaoshan; Liu, Zhenghong; Wang, Li; Liu, Jin; Chen, Jingsheng; Yang, Fan; Zhang, Chao; Li, Bin; Zhang, Lidong

doi:10.1016/j.gr.2021.11.011

Cited by 3 publications

(3 citation statements)

References 109 publications

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“…The discovery of Late Devonian calc-alkaline I-type rhyolite in the Yitong area (375.5 ± 4.6 Ma) [29] and high-K calc-alkaline I-type granite in the Changtu area (377 ± 2 Ma) [70] suggests that the PAO plate began to subduct southward during the Late Devonian. Late Devonian high-Mg andesite (370 Ma) in the Faku area, formed in a back-arc rift environment, supports that the PAO underwent southward subduction at this time, leading to the initiation of continental rifting in the Faku area and the development of a post-arc basin [71]. Song et al [151] based on ophiolites exposed in the CAOB, proposed the existence of two major oceanic expansion/subduction cycles between 500-410 Ma and 360-220 Ma.…”

Section: Active Continental Margin (375-360 Ma)mentioning

confidence: 79%

“…Mafic rocks are rarely exposed, only found in the Yitong area, as shoshonitic basalt. The Devonian (414-375 Ma) magmatism is weaker, exposed in Faku, Changtu, Gongzhuling, and Liaoyuan, with lithology mainly including granodiorite, rhyolite, rhyolitic tuff, dacite, monzogranite, etc., as well as a small amount of basalt and basaltic andesite [29,43,68,[69][70][71]89].…”

Section: Silurian To Devonian Magmatism In the Eastern Section Of The...mentioning

confidence: 99%

“…Therefore, it remains uncertain whether the Bainaimiao arc belt can extend over the Songliao Basin into northeastern China [12,58,59,67]. With the deepening of research, some Ordovician-Devonian rocks have been discovered in recent years in northern Liaoning Province and central to eastern Jilin Province [43,44,48,56,64,[68][69][70][71], providing valuable information for further understanding of tectonic evolution. The Silurian-Devonian rocks in Yitong County, Jilin Province, which document a continuous evolutionary history from the Silurian to the Permian, are particularly crucial for exploring the tectonic framework and accretionary processes along the eastern segment of the northern margin of the NCC.…”

Section: Introductionmentioning

confidence: 99%

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Middle Silurian–Middle Devonian Magmatic Rocks in the Eastern Segment of the Northern Margin of the North China Craton: Implications for Regional Tectonics

Li,

Chen,

Yang

et al. 2024

Minerals

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This paper presents a detailed study including LA-ICP-MS zircon U-Pb dating, geochemical, zircon Hf isotope, and whole rock Sr-Nd isotope analysis of magmatic rocks from the Yitong County, Jilin Province, NE China. These data are used to better constrain the Middle Silurian–Middle Devonian tectonic evolution in the eastern segment of the northern margin of the North China Craton (NCC). Zircon U-Pb dating results show that the Ximangzhang tonalite formed in the Late Silurian (425 ± 6 Ma); the basalt, andesite, and metamorphic olivine-bearing basalt in the Fangniugou volcanic rocks formed in the Middle Silurian (428 ± 6.6 Ma) and Middle Devonian (388.4 ± 3.9 Ma, and 384.1 ± 4.9 Ma). The Late Silurian tonalites are characterized by high SiO2 and Na2O and low K2O, MgO, FeOT, and TiO2, with an A/CNK ratio of 0.91–1.00, characteristic of calc-alkaline I-type granite. They are enriched in Rb, Ba, Th, U, and K, and depleted in Nb, Sr, P, and Ti, with positive εNd(t) (+0.35) and εHf(t) (+0.44 to +6.31) values, suggesting that they mainly originated from the partial melting of Meso–Neoproterozoic accretionary lower crustal material (basalt). The Middle Silurian basalts are characterized by low SiO2, P2O5, TiO2, and Na2O and high Al2O3, FeOT, and K2O, enriched in Rb, Ba, Th, U, and K and depleted in Nb, Ta, Sr, P, and Ti, indicative of shoshonitic basalt. The Late Silurian tonalites have positive εNd(t) (+4.91 to +6.18) values and primarily originated from depleted mantle magmas metasomatized by subduction fluids, supplemented by a small amount of subducted sediments and crustal materials. The Middle Devonian volcanic rocks exhibit low SiO2, TiO2, and Na2O and high K2O, and MgO, enriched in Rb, K, and LREEs and depleted in Nb, Ta, Sr, and HREEs, characteristic of shoshonitic volcanic rocks. Their εNd(t) (+2.11 to +3.77) and εHf(t) (+5.90 to +11.73) values are positive. These characteristics indicate that the Middle Devonian volcanic rocks primarily originated from depleted mantle magmas metasomatized by subduction fluids, with the addition of crustal materials or subducted sediments during their formation. Based on regional geological data, it is believed that the study area underwent the following evolutionary stages during the Silurian–Devonian period: (1) active continental margin stage of southward subduction of the Paleo–Asian Ocean (PAO) (443‒419 Ma); (2) arc-continent collision stage (419‒405 Ma); (3) post-collision extension stage (404‒375 Ma); (4) active continental margin stage, with the PAO plate subducting southward once again (375‒360 Ma).

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Section: Active Continental Margin (375-360 Ma)mentioning

confidence: 79%

Section: Silurian To Devonian Magmatism In the Eastern Section Of The...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Middle Silurian–Middle Devonian Magmatic Rocks in the Eastern Segment of the Northern Margin of the North China Craton: Implications for Regional Tectonics

Li,

Chen,

Yang

et al. 2024

Minerals

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The role of intra-oceanic arc in the growth of continental crust: Evidence from the Early Paleozoic Bainaimiao arc

Shi,

Wen,

Santosh

et al. 2024

Gondwana Research

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Tectonic evolution of the Middle-Late Permian orogenic belt in the eastern part of the CAOB: Implications from the magmatism in the Changchun-Kaiyuan area

Zhang,

Liu,

et al. 2023

Geol. Mag.

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Various magmatisms during the subduction-collision process are crucial to reveal the long-term tectonic evolution of the eastern Central Asian Orogenic Belt. In this paper, we present major and trace elements of whole-rock, zircon U-Pb dating and Hf isotope of the Shanmen pluton. Results imply that the Shanmen pluton consists of quartz diorite and mylonitic granite, with zircon U-Pb ages of 263.7–259.6 Ma. The studied quartz diorite contains high Sr/Y (51.19–90.87) and (La/Yb)N (7.82–13.62) ratios, and belongs to adakitic rocks. Coupled with the positive εHf(t) values of +5.71 to +12.8 with no obvious Eu anomaly, we propose that quartz diorite is the product of the interaction between different degrees of slab melt and the overlying mantle wedge. In contrast, the mylonitic granite has lower MgO (0.28 wt% – 0.47 wt%) contents and positive εHf(t) values of +7.79 to +10.15, indicating an affinity with I-type granite originated by partial melting of the intermediate-basic lower crust. The geochemical characteristics and lithological assemblages, along with the Permian magmatic rocks in the Changchun-Kaiyuan area displaying arc rocks affinity, propose their formation is related to the southward subduction of the Paleo-Asian Ocean (PAO). Based on this study and previous evidence, we lean towards adopting a middle-late Permian slab break-off model, wherein the PAO did not close until the late Permian.

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Back-arc system formation and extinction in the southern Central Asian Orogenic Belt: New constraints from the Faku ophiolite in north Liaoning, NE China

Cited by 3 publications

References 109 publications

Middle Silurian–Middle Devonian Magmatic Rocks in the Eastern Segment of the Northern Margin of the North China Craton: Implications for Regional Tectonics

Middle Silurian–Middle Devonian Magmatic Rocks in the Eastern Segment of the Northern Margin of the North China Craton: Implications for Regional Tectonics

The role of intra-oceanic arc in the growth of continental crust: Evidence from the Early Paleozoic Bainaimiao arc

Tectonic evolution of the Middle-Late Permian orogenic belt in the eastern part of the CAOB: Implications from the magmatism in the Changchun-Kaiyuan area

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