Yingtan Song
Detrital zircons from Late Paleozoic to Triassic sedimentary rocks of the Gongshan-Baoshan Block, SE Tibet: Implications for episodic crustal growth of Eastern Gondwana
Song, Yingtan; Su, Li; Dong, Jinlong; Song, Shuguang; Allen, Mark B.; Wang, Chao; Hu, Xiaolan
Authors
Li Su
Jinlong Dong
Shuguang Song
Professor Mark Allen m.b.allen@durham.ac.uk
Head of Department
Chao Wang
Xiaolan Hu
Abstract
The Gongshan-Baoshan Block is a segment of the northern Sibumasu Terrane, which is a continental strip derived from Eastern Gondwana. However, the formation history of the Gongshan-Baoshan Block and its relationship with other East Gondwana-derived blocks remain unclear. Here, we present five hundred and eighty new analyses of U-Pb ages of detrital zircons from Late Paleozoic to Triassic sedimentary rocks in the Gongshan-Baoshan Block, western Yunnan. The detrital zircon age spectra show distinctive age clusters at 2500–2400 Ma, 1750–1500 Ma, 1200–900 Ma, 600–500 Ma, with a few Archean ages of 3500–2600 Ma, suggesting secular, episodic, continental growth. The age spectra are comparable to those from the Sibumasu Terrane, Australia, Lhasa Block, Qiangtang Block, Tethyan High Himalaya and Cathaysia Block. We confirm that the Gongshan-Baoshan Block and Sibumasu Terrane could have occupied a position outboard of the Lhasa Block and close to northern India, along the northwestern margin of Australia in East Gondwana. The youngest ages from the Mesozioc sediments limit the timing of subduction of the Paleo-Tethys Ocean, which initiated by ~273 Ma and finally stopped at ~223 Ma.
Citation
Song, Y., Su, L., Dong, J., Song, S., Allen, M. B., Wang, C., & Hu, X. (2020). Detrital zircons from Late Paleozoic to Triassic sedimentary rocks of the Gongshan-Baoshan Block, SE Tibet: Implications for episodic crustal growth of Eastern Gondwana. Journal of Asian Earth Sciences, 188, https://doi.org/10.1016/j.jseaes.2019.104106
Journal Article Type | Article |
---|---|
Acceptance Date | Oct 24, 2019 |
Online Publication Date | Oct 25, 2019 |
Publication Date | Feb 28, 2020 |
Deposit Date | Nov 18, 2019 |
Publicly Available Date | Mar 29, 2024 |
Journal | Journal of Asian Earth Sciences |
Print ISSN | 1367-9120 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 188 |
DOI | https://doi.org/10.1016/j.jseaes.2019.104106 |
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Copyright Statement
© 2019 This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
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