Final Closure of the Paleo‐Asian Ocean and Onset of Subduction of Paleo‐Pacific Ocean: Constraints From Early Mesozoic Magmatism in Central Southern Jilin Province, NE China

Wang, Feng; Xu, Wen‐Liang; Xing, Kai‐Chen; Wang, Yini; Zhang, Hai‐Hong; Wu, Wenbin; Sun, Chen‐Yang; Ge, Wen‐Chun

doi:10.1029/2018jb016709

Cited by 52 publications

(23 citation statements)

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“…In the late Palaeozoic, the Paleo‐Asian oceanic plate subducted southwards beneath the northern margin of the NCC (Cao et al, ; Wang, Tang, et al, ). With the closure of the Paleo‐Asian Ocean, the northern margin of the NCC collided with the CAOB (Wang et al, ). In the Mesozoic, the Paleo‐Pacific Plate subducted beneath the Eurasian Plate (including the NCC), accompanied by intense magmatism (Wu et al, ; Xu et al, ).…”

Section: Geological Background and Sample Descriptionsmentioning

confidence: 99%

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Geochronology and geochemistry of late Carboniferous–Middle Jurassic magmatism in the Helong area, NE China: Implications for the tectonic transition from the Paleo‐Asian oceanic to circum‐Pacific regime

Tang

2019

Geological Journal

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In this study, we present new U–Pb zircon ages and whole‐rock major and trace element data for the late Carboniferous–Middle Jurassic intrusive rocks in the Helong area, NE China. These data constrain the timing of tectonic transition from the Paleo‐Asian oceanic regime to the circum‐Pacific regime. U–Pb zircon dating indicates that the late Carboniferous–Middle Jurassic magmatic events in the Helong area can be subdivided into late Carboniferous, middle Permian, Early–Middle Triassic, Late Triassic, Early Jurassic, and early Middle Jurassic. The late Carboniferous granodiorites and middle Permian monzogranites belong to the calc‐alkaline series and have an affinity to I‐type granitoids, suggesting that they formed in a typical Andean‐type continental arc setting due to the southward subduction of the Paleo‐Asian oceanic plate beneath the NCC. The Middle Triassic granodiorites and monzogranites in the Helong area exhibit an affinity to adakitic rocks with their parental magma derived by the partial melting of thickened lower continental crust. The Late Triassic I‐type monzogranites and coeval ultramafic–mafic rocks constitute a bimodal igneous rock association, together with coeval A‐type granites and rhyolites, signifying an extensional environment. Combined with the absence of 240‐ to 225‐Ma sedimentation, the study area experienced a change from Early–Middle Triassic compression to Late Triassic extension related to the final closure of the Paleo‐Asian Ocean. The Early–early Middle Jurassic gabbros, diorites, granodiorites, and monzogranites are calc‐alkaline in nature and enriched in LREE and LILE but depleted in HREE and HFSE. Combined with the spatial variations in K contents of Early Jurassic igneous rocks in NE China from the continental margin to intracontinental region, and the presence of an Early Jurassic accretionary complex, we suggest that Early–early Middle Jurassic magmatism in the Helong area formed in an active continental margin setting related to the subduction of the Paleo‐Pacific Plate beneath Eurasia. We conclude that the tectonic transition from the Paleo‐Asian oceanic regime to the circum‐Pacific regime occurred in the Late Triassic–Early Jurassic.

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Section: Geological Background and Sample Descriptionsmentioning

confidence: 99%

“…With the closure of the Paleo-Asian Ocean, the northern margin of the NCC collided with the CAOB (Wang et al, 2019). In the Mesozoic, the Paleo-Pacific Plate subducted beneath the Eurasian Plate (including the NCC), accompanied by intense magmatism (Wu et al, 2011;Xu et al, 2013).…”

Section: Geological Background and Sample Descriptionsmentioning

confidence: 99%

Geochronology and geochemistry of late Carboniferous–Middle Jurassic magmatism in the Helong area, NE China: Implications for the tectonic transition from the Paleo‐Asian oceanic to circum‐Pacific regime

Tang

2019

Geological Journal

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“…the early Mesozoic (Tang et al, 2018;Xiao et al, 2015;Ryu and Lee, 2017;Wang et al, 2019;Sun et al, 2018), as well as intense Mesozoic-Cenozoic volcanism and the establishment of the Songliao Basin (He et al, 2014).…”

Section: Accepted Articlementioning

confidence: 99%

The Structure of the Upper Mantle Transition Zone Beneath Northeast China Associated With Mantle Plume Migration

2021

Earth and Space Science

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“…In one school of thought, the final closure occurred prior to the Permian, mainly including before the Late Devonian and between the Late Devonian [54][55][56] and Early Carboniferous [57][58][59]. In an alternative view, the closing of the PAO occurred during the Permian-Triassic, which can be reclassified as during the late Early Permian [60,61], during the Middle-Late Permian [62][63][64][65], during the Late Permian [4,34,48,66], during the Late Permian-Early Triassic [3,10,11,21,33,35,40,41,50,[67][68][69][70], during the Late Permian-Middle Triassic [5,22,25,26,28,32,42,71,72], and during the Middle-Late Triassic [20,24,37,49,73]. Therefore, substantial controversy remains regarding the closure time of the PAO along the CYS.…”

Section: Introductionmentioning

confidence: 99%

The Late Triassic Molasse Deposits in Central Jilin Province, NE China: Constraints on the Paleo-Asian Ocean Closure

Han

Zhu

et al. 2021

Minerals

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This paper presents a new detailed study including zircon U-Pb-Hf isotopic, whole-rock geochemical and Sr-Nd isotopic analyses of conglomerate and granitic pebbles from the molasse deposits in central Jilin Province, NE China. These data are used to better constrain the Late Permian–Triassic tectonic evolution regarding particularly the final closure of the Paleo-Asian Ocean (PAO) along the Changhun-Yanji suture (CYS). Zircon U-Pb data indicate that the granitic pebbles formed in the end-Permian (254–253 Ma). The youngest detrital zircon age of 231 Ma from the conglomerate, and presence of the overlying Upper Triassic Sihetun Formation suggests that the molasse deposits on the Jin′gui Island formed during the Late Triassic. The end-Permian granitic rocks display high SiO2 (66.07–74.77 wt %), with low MgO (0.55–2.05 wt %) and Mg# (31.61–43.64) values, together with depleted Hf and Nd isotopic values (εHf(t) = +1.61 to +11.62; εNd(t) = +3.3 to +4.2; (87Sr/86Sr)i = 0.706458–0.706842) and juvenile second-stage Hf model ages (1148–512 Ma), suggesting that they were probably generated by the partial melting of a Meso-Neoproterozoic juvenile metabasaltic lower crust. They are characterized by enrichments in large ion lithophile elements (LILEs) and depletions in high field strength elements (HFSEs), with affinities to igneous rocks forming in a subduction-related setting. This, combined with regional coeval subduction-related magmatic rocks, indicates that the PAO still existed along the CYS. In addition, the identification of Late Triassic molasse deposits on the Jin′gui Island in this study, coupled with occurrences of many Early Triassic syn-collisional granitoids along the CYS, indicates that the final closure of the PAO took place prior to the Late Triassic.

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Final Closure of the Paleo‐Asian Ocean and Onset of Subduction of Paleo‐Pacific Ocean: Constraints From Early Mesozoic Magmatism in Central Southern Jilin Province, NE China

Cited by 52 publications

References 124 publications

Geochronology and geochemistry of late Carboniferous–Middle Jurassic magmatism in the Helong area, NE China: Implications for the tectonic transition from the Paleo‐Asian oceanic to circum‐Pacific regime

Geochronology and geochemistry of late Carboniferous–Middle Jurassic magmatism in the Helong area, NE China: Implications for the tectonic transition from the Paleo‐Asian oceanic to circum‐Pacific regime

The Structure of the Upper Mantle Transition Zone Beneath Northeast China Associated With Mantle Plume Migration

The Late Triassic Molasse Deposits in Central Jilin Province, NE China: Constraints on the Paleo-Asian Ocean Closure

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