NDLI: Ar-Ar geochronology of Late Mesozoic volcanic rocks from the Yanji area, NE China and tectonic implications

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Ar-Ar geochronology of Late Mesozoic volcanic rocks from the Yanji area, NE China and tectonic implications

Content Provider	Springer Nature Link
Author	Li, ChaoWen Guo, Feng Fan, WeiMing Gao, XiaoFeng
Copyright Year	2007
Abstract	Ar-Ar dating results of late Mesozoic-Cenozoic volcanic rocks from the Yanji area, NE China provide a new volcano-sedimentary stratigraphic framework. The previously defined “Triassic-Jurassic” volcanic rocks (including those from Sanxianling, Tuntianying, Tianqiaoling and Jingouling Fms.) were erupted during 118–106 Ma, corresponding to Early Cretaceous. The new eruption age span is slightly younger than the main stage (130–120 Ma) of the extensive magmatism in the eastern Central Asian Orogenic Belt and its adjacent regions. Subduction-related adakites occurring in the previously defined Quanshuicun Fm. were extruded at ca. 55 Ma. Based on these new Ar-Ar ages, the late Mesozoic to Palaeocene volcano-sedimentary sequences is rebuilt as: Tuopangou Fm., Sanxianling/Tuntianying Fm. (118–115 Ma), Malugou/Tianqiaoling Fm. (K$_{1}$), Huoshanyan/Jingouling Fm. (108–106 Ma), Changcai Fm. (K$_{2}$), Quanshuicun Fm. (∼55 Ma) and Dalazi Fm. Our results suggest that subduction of the Palaeo-Pacific Ocean beneath the East Asian continental margin occurred during 106 to 55 Ma, consistent with the paleomagnetic observations and magmatic records which indicated that the Izanagi-Farallon ridge subduction beneath the southwestern Japan took place during 95–65 Ma.
Starting Page	505
Ending Page	518
Page Count	14
File Format	PDF
ISSN	10069313
Journal	Science in China Series D: Earth Sciences
Volume Number	50
Issue Number	4
e-ISSN	18622801
Language	English
Publisher	Science in China Press
Publisher Date	2007-01-01
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	Ar-Ar geochronology Late Mesozoic volcanic rocks tectonic implications Yanji area Geosciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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