Blueschist metamorphism and its tectonic implication of Late Paleozoic–Early Mesozoic metabasites in the mélange zones, central Inner Mongolia, China

Zhang, Jinrui; Wei, Chunjing; Chu, Hong

doi:10.1016/j.jseaes.2014.07.032

Cited by 59 publications

(35 citation statements)

References 59 publications

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“…This P-T estimate is consistent with the estimate of ~7 kbar using the Na M4 barometer of Brown (1977;Fig. 9A) and is within the P-T estimates reported by Zhang et al (2014) for the blueschists in central Inner Mongolia.…”

Section: Metamorphic P-t Conditions Of the Toudaoqiao Blueschistsupporting

confidence: 89%

Age, protoliths and tectonic implications of the Toudaoqiao blueschist, Inner Mongolia, China

Miao

Zhang

Jiao

2015

Journal of Asian Earth Sciences

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Section: Metamorphic P-t Conditions Of the Toudaoqiao Blueschistsupporting

confidence: 89%

Age, protoliths and tectonic implications of the Toudaoqiao blueschist, Inner Mongolia, China

Miao

Zhang

Jiao

2015

Journal of Asian Earth Sciences

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“…() and Zhang et al . () further proposed that such blueschist‐facies metamorphism was possibly ascribed to closure of the limited oceanic basin and subsequent continent‐arc collision during Permian–Triassic time. Late Carboniferous–Early Permian arc‐related magmatism existed both in the northern margin of North China Craton (Zhang et al . , ) and the Baolidao arc accretion complex (Chen et al .…”

Section: Discussionmentioning

confidence: 99%

Permian back‐arc extension in central Inner Mongolia, NE China: Elemental and Sr–Nd–Pb–Hf–O isotopic constraints from the Linxi high‐MgO diabase dikes

Guo

et al. 2015

Island Arc

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Early Permian (272 ± 2 Ma) diabase dikes from the Linxi area in central Inner Mongolia of NE China have high .2 -6.0 ‰ with an average of 5.7 ‰) than normal mantle. The combined geochemical data indicate their derivation from a depleted mantle metasomatized by recycled crustal component. Elemental and isotopic modeling results suggest that the primary magma was produced through 5 % to 10 % melting of a depleted mantle, which contained approximately 1 % sediment fluid released from the subducted paleo-Asian Ocean. Considering the widespread distribution of contemporaneous mafic rocks across the central Inner Mongolia, which show REE patterns from E-MORBs to normal MORBs, we propose a petrogenetic link between the Early Permian mafic magmatism and a back-arc extension in response to northward subduction of the paleo-Asian Ocean. The Permian mafic magmatism and the new age constraints from the metamorphic and sedimentary records in this area tend to indicate the ultimate closure of the paleo-Asian Ocean by the end of Paleozoic.

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“…The midlatitude results are compatible with an open PAO during the Carboniferous‐Early Permian period. Geological evidence for the PAO includes the presence of deep‐water radiolarians within the Middle Permian Zhesi Formation (Shang, ), widespread Permian‐aged subduction‐related igneous rocks (S. Zhang et al, , ), tomographic evidence for subducted slabs (Van der Meer et al, ), ubiquitous Permo‐Carboniferous ophiolites (Miao et al, ; Song et al, ), and the presence of Permian to Early Triassic age blueschists (B. Chen et al, ; Chu et al, ; J. Zhang et al, ).…”

Section: Discussionmentioning

confidence: 99%

Permian Paleogeography of the Eastern CAOB: Paleomagnetic Constraints From Volcanic Rocks in Central Eastern Inner Mongolia, NE China

et al. 2018

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We carried out a paleomagnetic investigation on Permian volcanic rocks from central eastern Inner Mongolia, NE China, in order to identify the paleoposition of the North China and Songliao‐Xilinhot blocks during Permo‐Carboniferous times and thereby define the spatial‐temporal history of the eastern Paleo‐Asian Ocean (PAO). Two prefolding magnetization components were isolated from the Sanmianjing and Elitu Formations (~283–266 Ma) along the northern margin of North China block (NMNCB) and the Dashizhai Formation (~280 Ma) in the Songliao‐Xilinhot block (SXB). These two results suggest paleolatitudes of ~4.9°N for the SXB and ~22.3°N for the NMNCB. Previously published results are classified according to recently proposed models and evaluated for the influence of inclination shallowing. Combined with earlier multidisciplinary studies, we propose a tentative paleogeographic reconstruction model for the eastern Central Asian Orogenic Belt (CAOB) during the Late Carboniferous to Early Triassic times. Siberia was situated at middle‐high paleolatitudes (~45°–65°N), and the Central Mongolia‐Erguna and South Mongolia‐Xing'an blocks had a middle latitude (~30°–45°N) from the Late Carboniferous to Early Permian. By the Late Permian to Early Triassic (~250 Ma), there was no significant latitudinal difference between the eastern CAOB blocks. Final closure of the eastern PAO along both the Hegenshan‐Heihe and Solonker sutures took place followed by the formation of Cinamuria.

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Blueschist metamorphism and its tectonic implication of Late Paleozoic–Early Mesozoic metabasites in the mélange zones, central Inner Mongolia, China

Cited by 59 publications

References 59 publications

Age, protoliths and tectonic implications of the Toudaoqiao blueschist, Inner Mongolia, China

Age, protoliths and tectonic implications of the Toudaoqiao blueschist, Inner Mongolia, China

Permian back‐arc extension in central Inner Mongolia, NE China: Elemental and Sr–Nd–Pb–Hf–O isotopic constraints from the Linxi high‐MgO diabase dikes

Permian Paleogeography of the Eastern CAOB: Paleomagnetic Constraints From Volcanic Rocks in Central Eastern Inner Mongolia, NE China

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