2020
DOI: 10.1002/gj.3739
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Late Devonian to early Carboniferous magmatism in the western Songliao–Xilinhot block, Northeast China: Implications for eastward subduction of the Nenjiang oceanic lithosphere

Abstract: The timing and direction of narrowing and closure of the Nenjiang Ocean (NJO) by plate subduction remain poorly constrained. This paper presents geochemical, isotopic, and geochronological results for Late Devonian to early Carboniferous intrusive rocks in the western Songliao–Xilinhot block to constrain the evolution of subduction in the NJO region. The Late Devonian syenogranites and monzogranites formed at 366–360 Ma and are classified as A‐type granites. The wide range of εHf(t) values (−17.62 to +8.13) an… Show more

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Cited by 12 publications
(17 citation statements)
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References 120 publications
(195 reference statements)
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“…In more recent studies, several lines of evidence from the NHS region support closure of the Nenjiang Ocean by the Late Carboniferous. These include (a) sedimentary facies transition from marine strata in the Early Carboniferous to continental facies in the Late Carboniferous (Liu et al., 2017); (b) the 320 Ma syn‐tectonic S‐type granites in the Moguqi area (Ma et al., 2020) which imply a syn‐collision tectonic setting; (c) evidence for extension throughout the studied region during the Early Permian and extensive coeval post‐orogenic A‐type granites (Feng et al., 2015; Liu et al., 2017; Shi et al., 2015; Wu et al., 2002) and rift‐related bimodal volcanic rocks (Zeng et al., 2011).…”
Section: Discussionmentioning
confidence: 99%
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“…In more recent studies, several lines of evidence from the NHS region support closure of the Nenjiang Ocean by the Late Carboniferous. These include (a) sedimentary facies transition from marine strata in the Early Carboniferous to continental facies in the Late Carboniferous (Liu et al., 2017); (b) the 320 Ma syn‐tectonic S‐type granites in the Moguqi area (Ma et al., 2020) which imply a syn‐collision tectonic setting; (c) evidence for extension throughout the studied region during the Early Permian and extensive coeval post‐orogenic A‐type granites (Feng et al., 2015; Liu et al., 2017; Shi et al., 2015; Wu et al., 2002) and rift‐related bimodal volcanic rocks (Zeng et al., 2011).…”
Section: Discussionmentioning
confidence: 99%
“…The western margin of the Songliao‐Jiamusi block developed on Precambrian basement whereas the interior Songliao basin is floored by Mesozoic and late Paleozoic basement (Qian et al., 2018; Wu et al., 2018). Silurian to Carboniferous arc‐related igneous rocks that recorded bilateral subduction of the Nenjiang Ocean are preserved on both sides of the NHS (Feng et al., 2015; Liu et al., 2019; Ma et al., 2020). A suite of Upper Carboniferous to Upper Permian volcanic‐sedimentary sequences outcrop in the Ulanhot area (Figures 1b and 2; IMBGMR, 1991).…”
Section: Geological Setting and Samplingmentioning
confidence: 99%
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“…The timing and direction of narrowing and closure of the Nenjiang Ocean (NJO) by plate subduction remain poorly constrained. Ma et al (, this issue) report geochemical, isotopic, and geochronological data for Late Devonian to early Carboniferous intrusive rocks in the western Songliao–Xilinhot block. A new model are proposed in this study, in which westward subduction of NJO oceanic crust during the Late Devonian at 366–360 Ma was followed by bidirectional subduction during the early Carboniferous at ~342 Ma, and ended up with break‐off/delamination of the eastward subducting slab at ~334 Ma.…”
Section: Eastern Altaidsmentioning
confidence: 99%