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| Titel |
Linking Tengchong Terrane in SW Yunnan with Lhasa Terrane in southern Tibet through magmatic correlation |
| VerfasserIn |
Jincheng Xie, Dicheng Zhu, Guochen Dong, Zhidan Zhao, Qing Wang |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250127243
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| Publikation (Nr.) |
 EGU/EGU2016-7096.pdf |
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| Zusammenfassung |
| New zircon U-Pb data, along with the data reported in the literature, reveal five phases of
magmatic activity in the Tengchong Terrane since the Early Paleozoic with spatial and
temporal variations summarized as: Cambrian-Ordovician (500-460 Ma) to the eastern, minor
Triassic (245-206 Ma) in the eastern and western, abundant Early Cretaceous (131-114 Ma)
in the eastern, extensive Late Cretaceous (77-65 Ma) in the central, and Paleocene-Eocene
(65-49 Ma) in the central and western Tengchong Terrane, in which the Cretaceous-Eocene
magmatism was migrated from east to west (Xu et al., 2012). The increased zircon
eHf(t) of the Early Cretaceous granitoids from -12.3 to -1.4 at ca. 131-122 Ma to
-4.6 to +7.1 at ca. 122-114 Ma identified for the first time in this study and the
magmatic flare-up at ca. 53 Ma in the central and western Tengchong Terrane (Wang et
al., 2014, Ma et al., 2015) indicate the increased contributions from mantle- or
juvenile crust-derived components. The spatial and temporal variations and changing
magmatic compositions with time in the Tengchong Terrane closely resemble the Lhasa
Terrane in southern Tibet. Such similarities, together with the data of stratigraphy and
paleobiogeography (Zhang et al., 2013), enable us to propose that the Tengchong
Terrane in SW Yunnan is most likely linked with the Lhasa Terrane in southern
Tibet, both of which experience similar tectonomagmatic histories since the Early
Paleozoic.
References
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