Y. Xia
Neoproterozoic amalgamation between Yangtze and Cathaysia blocks: The magmatism in various tectonic settings and continent-arc-continent collision
Xia, Y.; Xu, X.S.; Niu, Yaoling; Liu, L.
Authors
X.S. Xu
Yaoling Niu
L. Liu
Abstract
According to the temporal-spatial distribution of Neoproterozoic igneous rocks and relative rocks in South China, including ophiolites, arc volcanic and intrusive rocks and subsequent bimodal magmatism, we identified the presence of a Neoproterozoic intra-oceanic arc, continent-arc-continent collision and three tectono-magmatic zones between the Yangtze Block and Cathaysia Block. We have also unraveled the amalgamation and tectono-magmatic histories between the Yangtze and Cathaysia blocks: At ∼ 1000–860 Ma, northwestward ocean-ocean subduction and southeastward ocean-continent subduction resulted in the intra-oceanic arc magmatism and active continental margin magmatism in the Cathaysia Block respectively. At ∼ 860–825 Ma, the steepening subdution caused development of back-arc basin in the intra-oceanic arc zone and the slab rollback induced the arc and back-arc magmitism in the Cathaysia Block. Meanwhile, a shallow dip northwestward ocean-continent subduction formed active continental margin magmatism in the Yangtze Block. At ∼ 825–805 Ma, the continent-arc-continent collision and final amalgamation between the Yangtze and Cathaysia blocks yielded the Jiangnan Orogen. At ∼ 805–750 Ma, the Jiangnan Orogen collapsed, and the Nanhua rift basin formed. Our study also rules out any Grenvillian Orogenic event and mantle plume activity in South China and indicates a marginal position of South China in the Rodinia supercontinent.
Journal Article Type | Article |
---|---|
Acceptance Date | Feb 24, 2017 |
Online Publication Date | Mar 6, 2017 |
Publication Date | May 1, 2018 |
Deposit Date | Mar 13, 2017 |
Publicly Available Date | Mar 6, 2018 |
Journal | Precambrian Research |
Print ISSN | 0301-9268 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 309 |
Pages | 56-87 |
DOI | https://doi.org/10.1016/j.precamres.2017.02.020 |
Public URL | https://durham-repository.worktribe.com/output/1391356 |
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Publisher Licence URL
http://creativecommons.org/licenses/by-nc-nd/4.0/
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