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- W2365228897 abstract "In order to better understand the spatial-temporal evolution regularity of Late Mesozoic magmatism in the western part of the Yanshan mountain,the high precision Zircon U-Pb dating ages from recent studies have been compiled for summarizing the temporal sequence of the Mesozoic intrusive bodies exposed in the Beijing area.The result shows that two stages of Mesozoic intrusive events occurred from the end of Late Triassic to the beginning of Early Jurassic and from Late Jurassic to Early Cretaceous respectively.No evidence at present has been given to confirm that the Middle Jurassic plutonism is existed in the Beijing area.These results mean that there are lots of problems in the previous hierarchical structure of the previously delineated Badaling Complex and the Mesozoic intrusive rocks in the Beijing area because the previous hierarchical structure does not properly represent the actual sequence of the Mesozoic intrusive events.According to the intrusive rock assemblage and their geochemical features,it is inferred that,the Jurassic-Cretaceous crustal thinning and the post-orogenic stage should be occurred later than 130~125 Ma in the western part of the Yanshan mountain.It is believed that more field observations should be undertaken and more high-precision zircon U-Pb dating ages should be obtained for establishing the complete spatial-temporal pattern of Late Mesozoic intrusive activities in the western part of the Yanshan mountain." @default.
- W2365228897 created "2016-06-24" @default.
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- W2365228897 date "2007-01-01" @default.
- W2365228897 modified "2023-09-23" @default.
- W2365228897 title "Temporal Sequence of Mesozoic Intrusive Bodies in the Beijing Area and Its Geological Significance" @default.
- W2365228897 hasPublicationYear "2007" @default.
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