SHRIMP U-Pb zircon age, geochemistry and Nd isotope of the Guandaoshan pluton in SW Sichuan: Petrogenesis and tectonic significance

SHRIMP U-Pb zircon age, geochemical and Nd isotopic data are reported for the Neo-proterozoic Guandaoshan pluton in the Yanbian region, SW Sichuan. This pluton is of typical I-type granite and emplaced at (857 ± 13) Ma. Geochemical and Nd isotopic characters suggest that the pluton was generated by...

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Veröffentlicht in:Science China. Earth sciences 2003-03, Vol.46 (1), p.73-83
Hauptverfasser: Xianhua, Li, Zhengxiang, Li, Hanwen, Zhou, Ying, Liu, Xirong, Liang, Wuxian, Li
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Sprache:eng
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Zusammenfassung:SHRIMP U-Pb zircon age, geochemical and Nd isotopic data are reported for the Neo-proterozoic Guandaoshan pluton in the Yanbian region, SW Sichuan. This pluton is of typical I-type granite and emplaced at (857 ± 13) Ma. Geochemical and Nd isotopic characters suggest that the pluton was generated by partial melting of pre-existing, young (late Mesoproterozoic to early Neo-proterozoic) low-K tholeiitic protolith within an intraplate anorogenic setting. The Guandaoshan pluton probably records the earliest magmatism induced by the proposed ca. 860-750 Ma mantle superplume beneath the supercontinent Rodinia.[PUBLICATION ABSTRACT]
ISSN:1006-9313
1674-7313
1862-2801
1869-1897
DOI:10.1360/03dz9029