气候变化领域集成服务门户(CCPortal): Late mesozoic intraplate rhyolitic volcanism in the North China craton: Far-field effect of the westward subduction of the paleo-pacific plate

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DOI	10.1130/B35123.1
	Late mesozoic intraplate rhyolitic volcanism in the North China craton: Far-field effect of the westward subduction of the paleo-pacific plate
	Yang F.; Santosh M.; Kim S.W.; Zhou H.; Jeong Y.J.
发表日期	2020
ISSN	167606
起始页码	291
结束页码	309
卷号	132 期号:2021-01-02
英文摘要	The Late Mesozoic was characterized by extensive volcanism, crustal extension, lithospheric thinning, and craton destruction in the North China Craton (NCC). Here we investigate the petrology, whole-rock geochemistry, zircon U-Pb geochronology, and Lu-Hf isotope of rhyolitic rocks from the Chicheng region of China along the northern margin of the NCC to constrain their petrogenesis, magma evolution, and associated geodynamic processes. The newly obtained zircon U-Pb age data constrain the eruption age of rhyolitic rocks at ca. 144-114 Ma during the Early Cretaceous with multiple magmatic pulses at ca. 141, ca. 137, and ca. 130 Ma as defined by the age peaks. Zircon Hf isotopic data show markedly negative εHf(t) values of -23.0 to -11.8, and corresponding Hf crustal model ages (TDM C) are in the range of ca. 2650 to 1944 Ma, suggesting magma derivation through melting of Paleoproterozoic crustal materials with minor input of reworked Neoarchean components. Geochemically, the rhyolitic rocks correspond to A-type granites, with a mixed arc-and subductionrelated signature, although generated in an extensional intraplate setting through partial melting of the mafic lower crust and upper crustal fractional crystallization. We correlate the late Mesozoic intraplate volcanism to the westward subduction of the Paleo-Pacific Plate and its far-field effect. Lithospheric extension and slab rollback of the Paleo-Pacific Plate are considered as the main triggers for the multiple eruptions. The late Mesozoic volcanism in the study area and adjacent regions also broadly coincide with the tectonic transition from the Paleozoic Paleo-Asian to Mesozoic Paleo-Pacific subduction realm with concomitant compressional to extensional tectonic regime. © 2019 Geological Society of America.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184877
作者单位	School of Earth Sciences and Resources, China University of Geosciences Beijing, 29 Xueyuan Road, Beijing, 100083, China; Department of Earth Sciences, School of Physical Sciences, The University of AdelaideSA 5005, Australia; Geological Research Division, Korea Institute of Geoscience and Mineral Resources, Daejeon, 305-350, South Korea; Tianjin Center, China Geological Survey, Tianjin, 300170, China; Division of Earth and Environmental Science, Korea Basic Science Institute, Chungcheongbuk-do, 28119, South Korea
推荐引用方式 GB/T 7714	Yang F.,Santosh M.,Kim S.W.,et al. Late mesozoic intraplate rhyolitic volcanism in the North China craton: Far-field effect of the westward subduction of the paleo-pacific plate[J],2020,132(2021-01-02).
APA	Yang F.,Santosh M.,Kim S.W.,Zhou H.,&Jeong Y.J..(2020).Late mesozoic intraplate rhyolitic volcanism in the North China craton: Far-field effect of the westward subduction of the paleo-pacific plate.Bulletin of the Geological Society of America,132(2021-01-02).
MLA	Yang F.,et al."Late mesozoic intraplate rhyolitic volcanism in the North China craton: Far-field effect of the westward subduction of the paleo-pacific plate".Bulletin of the Geological Society of America 132.2021-01-02(2020).