Microplate tectonics: new insights from micro-blocks in the global oceans, continental margins and deep mantle

Li, Sanzhong; Suo, Yanhui; Li, Xiyao; Liu, Bo; Dai, Liming; Wang, Guangzeng; Zhou, Jie; Li, Yang; Liu, Yiming; Somerville, Ian D.; Mu, Dunling; Zhao, Shilin; Liu, Jinping; Fan, Meng; Zhen, Libing; Zhao, Li; Zhu, Junjiang; Yu, Shengyao; Liu, Yongjiang; Zhang, Guowei

doi:10.1016/j.earscirev.2018.09.005

Cited by 77 publications

(23 citation statements)

References 79 publications

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“…Due to the extension and thinning of the continental lithosphere of the SCS since the Late Cretaceous, these microcontinents began to rotate and displace, finally reaching the present position (Liu et al, ). The SCB, together with those continental terranes of east and Southeast Asia, are considered as an integrated part of Gondwana (Li et al, ; Li, Li, & Li, ; Yao, Li, Li, Li, & Yang, ; Yu et al, ). In all, all the above cases indicate that the SCS have Precambrian materials, and the ancient continental basement has experienced multistages magmatic events.…”

Section: Discussionmentioning

confidence: 99%

“…The southern margin is a strike‐slip pull‐apart zone, and a series of oil and gas basins are developed (Shi & Yan, ; Wan et al, ; Yan, Shi, Yang, et al, ; Yan, Shi, Wang, Bu, et al, ). In addition, there are several microcontinents dispersed in the SCS, including Xisha‐Zhongsha Block, Nansha Block, and Reed‐Northeastern Palawan Block (Li et al, ; Yan et al, ; Yan, Shi, Wang, et al, ; Yan, Shi, Yang, et al, ; Yao, Wan, & Wu, ). These microcontinents were regarded as an integrated block during Paleo‐Tethys times, which was named “Qiongdongnan block” (Liu et al, ; Liu, Yan, Liu, & Deng, ).…”

Section: Geological Setting and Sample Descriptionmentioning

confidence: 99%

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The basement and volcanic activities of the Xisha Islands: Evidence from the kilometre‐scale drilling in the northwestern South China Sea

Zhang

Qian

et al. 2019

Geological Journal

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As one of the microcontinents dispersed in the South China Sea (SCS), the Xisha microcontinent lacks the petrological evidence of the Cenozoic magmatic activity and basement. Well CK-2, as a full-coring kilometre-scale major scientific drilling in Xisha Islands in the northwestern SCS, drilled through the thick reefal limestone and into the underlying basaltic pyroclastic rocks basement. This paper presents zircon U-Pb age and mineral chemistry of clinopyroxenes from the basaltic pyroclastic rocks. Mineral composition of the clinopyroxenes suggests that most of the clinopyroxenes are composed of diopside, which contains relatively high Al(w (Al 2 O 3 ) = 5.03%-10.25%) and Ti(w (TiO 2 ) = 2.2%-4.95%). The clinopyroxene discrimination diagrams show that the primary magma is alkaline basalt and likely generated in an intraplate tectonic setting. U-Pb dating of zircons by LA-ICP-MS yielded a wide range of ages: 36-33, 116-104, 148-140, 207-196, 255-236, 440, 808-749, and 2,440-1185 Ma. The youngest group has an average age of 35.5 ± 0.9 Ma, which is considered as the maximum age of the basalt eruption. The 2440 ± 19 Ma, which is the oldest zircons in the SCS, are firstly found in the basaltic pyroclastic rocks from the SCS, suggesting that the SCS may contain very old materials. The ages of the inherited zircons are comparable to magmatic activities that occurred around the SCS, implying that they were probably once linked and an integrated part of Gondwana. The ancient continental basement has experienced multistages magmatic events.

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Section: Discussionmentioning

confidence: 99%

Section: Geological Setting and Sample Descriptionmentioning

confidence: 99%

The basement and volcanic activities of the Xisha Islands: Evidence from the kilometre‐scale drilling in the northwestern South China Sea

Zhang

Qian

et al. 2019

Geological Journal

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“…The oceanic subduction-continental collision system has been a research hotspot in recent years (Dai et al, 2018;Li et al, 2018aLi et al, , b, 2019Yu et al, 2019a, b, c) and most researchers studied the subduction of the Paleo-Asian oceanic plate and the collision between the NCC and NE China massifs based on the evidence from magmatic rocks, structural features and palaeontological data (Huang, 1983(Huang, , 1991Wang and Liu, 1986;Sun et al, 2004;Jia et al, 2004;Wu et al, 2007;Cao et al, 2013;Wang et al, 2015aWang et al, , b, 2016Yang et al, 2017;Zhou et al, 2017;Gu et al, 2018;Du et al, 2019). Different from previous studies, we take a perspective of provenance analysis by concentrating on the sedimentary strata in terms of petrology, geochronology and geochemistry, which are situated in Jiutai area along the suture line between the NCC and NE China massifs (Fig.…”

Section: Transformation Of Provenance Tectonic Settings: Implication mentioning

confidence: 99%

Final Closure Time of the Paleo‐Asian Ocean: Implication from the Provenance Transformation from the Yangjiagou Formation to Lujiatun Formation in the Jiutai Area, NE China

Zhang

Liang

Liu

et al. 2019

Acta Geologica Sinica (Eng)

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The Jiutai area is tectonically situated at the eastern segment of the Central Asian Orogenic Belt (CAOB) and is close to the North China Craton (NCC) to the south, serving as an ideal place to investigations of the closure of the Paleo‐Asian Ocean (PAO). Sandstone samples collected from the Yangjiagou Formation and the Lujiatun Formation in this area have been studied in detail in terms of petrology, geochronology and geochemistry. The maximum depositional time of the Yangjiagou and Lujiatun formations has been constrained to early Middle Triassic (ca. 245 Ma) and middle Late Triassic (ca. 219 Ma), respectively. The Yangjiagou Formation, with a major provenance of dissected island arcs, is dominantly composed of Phanerozoic sediments from Northeastern China (NE China) massifs. The Lujiatun Formation, with major sediments from active continental margins, has a relatively larger proportion of Precambrian sediments, in which the ∼1.85 Ga and ∼2.5 Ga sediments are typical of the crystalline basements of the NCC and NE China massifs, which were uplifted and eroded during the closure of the PAO. Besides, both formations show the enrichment in LREEs and the depletion in HREEs, the common Eu negative anomalies, and trace element contents similar to that of the upper continental crust. Based on the provenance analysis of these two formations, the final closure time of the PAO in this area is constrained as from the early Middle Triassic (ca. 245 Ma) to the middle Late Triassic (ca. 219 Ma).

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“…However, with regard to the closure time and evolution model of the eastern part, there is still no conclusion. Many investigations have been carried out on oceanic subduction and continental collision systems in recent years (Dai et al, ; Li et al, ; Li, Sun, et al, ; Li, Suo, et al, ; Yu et al, ; Yu et al, ; Yu et al, ) and most researchers studied the subduction of the Mongol–Okhotsk oceanic plate according to the spatial and temporal distribution of granitoids and metamorphic rocks on both sides of the MOSB (Qin et al, ; Tang et al, ; Wu et al, ; Xu et al, ; Ying, Zhou, Zhang, Wang, & Zhang, ) and the final closure time of the eastern part of the Mongol–Okhotsk Ocean was constrained to (a) Early‐Middle Jurassic (Chen et al, ; Sorokin et al, ; Tomurtogoo et al, ); (b) Middle‐Late Jurassic (Ying et al, ; Ying, Zhou, Zhang, Wang, & Zhang, ); and (c) Earliest Cretaceous (Cogné et al, ; Halim et al, ; Kravchinsky et al, ; Metelkin et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…The Mohe Basin, close to the south of MOSB (Figure a,b), was initially referred to as a rift basin (HBGMR, ). While recently, more researchers have accepted the view that the Mohe Basin was a foreland basin in the Jurassic (He, Li, Mo, & Sorokin, ; Hou, Liu, He, He, & Zhang, ; Li et al, ; Li, He, Mo, & Sorokin, ; Sun et al, ; Zhang, Liu, Fang, & Sun, ) and presented a possible genetic relationship between the closure of the Mongol–Okhotsk Ocean and the formation of the basin (He et al, ; Li et al, ; Li et al, ; Li et al, ; Liu et al, ; Wu, Li, Mi, Liu, & Zhu, ; Yang et al, ; Zhao, Han, Zhang, & Hou, ). Thus, the Mohe Basin has been a good window into investigations of the evolution of the Mongol–Okhotsk Ocean during the Mesozoic.…”

Section: Introductionmentioning

confidence: 99%

Provenance analysis and tectonic setting of the Upper Jurassic Series in Mohe Basin, northeast China: Implication for the closure of Mongol–Okhotsk Ocean

et al. 2019

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The Mohe Basin, to the south of Mongol–Okhotsk suture belt (MOSB) closely, is a good window into investigations of the evolution of the Mongol–Okhotsk Ocean during the Late Mesozoic. Sandstone samples of the Upper Jurassic Series in the Mohe Basin, Mohe, and Kaikukang formations are studied in detail in terms of petrography, geochronology, and geochemistry. All samples have low compositional and textural maturity, which are located in the areas of dissected arc and basement uplift in Dickinson's discrimination diagrams. LA‐ICP‐MS U–Pb zircon dating yields the youngest concordant ages of 173 ± 4 Ma and 157 ± 3 Ma for the Mohe and Kaikukang formations, respectively, which constrain the maximum sedimentary periods of them. The peak ages of all concordant ages correspond identically to the regional magmatic activities on both the Siberian Craton and Erguna Block. All samples demonstrate geochemical characteristics not so different from the upper continental crust, whose provenance is felsic in lithology and is situated in active continental margins. Thus, a Mohe foreland basin and its binary provenance are strongly suggested, with the Erguna Block – a southern source and the Siberian Craton – a northern one. Based on all the evidence above, a simple tectonic model of the evolution of the Mongol–Okhotsk Ocean is raised, that is, from the Triassic to the Middle Jurassic; the Mongol–Okhotsk oceanic plate continued to subduct under the Siberian Craton and the Erguna Block, triggering intense magmatism in these areas. In the Late Jurassic, the rapid closure of the Mongol–Okhotsk Ocean caused the basement uplift and intense denudation which provided abundant sources of dissected arc and basement materials for the Mohe Basin.

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Microplate tectonics: new insights from micro-blocks in the global oceans, continental margins and deep mantle

Cited by 77 publications

References 79 publications

The basement and volcanic activities of the Xisha Islands: Evidence from the kilometre‐scale drilling in the northwestern South China Sea

The basement and volcanic activities of the Xisha Islands: Evidence from the kilometre‐scale drilling in the northwestern South China Sea

Final Closure Time of the Paleo‐Asian Ocean: Implication from the Provenance Transformation from the Yangjiagou Formation to Lujiatun Formation in the Jiutai Area, NE China

Provenance analysis and tectonic setting of the Upper Jurassic Series in Mohe Basin, northeast China: Implication for the closure of Mongol–Okhotsk Ocean

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