Eclogites provide important constraints on the processes of plate subduction, collision, and the overall tectonic evolution of orogens. The Gubaoquan eclogite is the only one identified in the Beishan Orogenic Belt, which constitutes the southernmost part of the Central Asian Orogenic Belt. U-Pb dating of the eclogite indicates a Neoproterozoic metamorphic age of 887 ± 7 Ma and an Ordovician age of 461 ± 15 Ma for the eclogite-facies metamorphism. Multi-proxy (zircon, monazite, rutile, and apatite) U/Th-Pb geochronology and trace element geochemistry reveal that they have experienced multiple tectonothermal events in the Neoproterozoic and Paleozoic. The protolith of the Gubaoquan eclogite is of continental origin, and along with the extensive distribution of the Neoproterozoic arc-related rocks probably formed near the periphery of Rodinia. Given the continental setting of the protolith of the Gubaoquan eclogite, we suggest that eclogite-facies metamorphism at ca. 461 Ma was due to subduction under the Shuangyingshan-Huaniushan arc, which is manifested as an arc-continental collision process.
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Research Article|
January 13, 2025
Early Publication
Neoproterozoic–early Paleozoic evolution of the southern Central Asian Orogenic Belt: Constraints from eclogites in the Beishan Orogenic Belt (NW China)
Tingyi Wang;
Tingyi Wang
1
State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China
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Peter A. Cawood;
Peter A. Cawood
2
School of Earth, Atmosphere & Environment, Monash University, Melbourne, Victoria 3800, Australia
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Chunrong Diwu;
Chunrong Diwu
1
State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China
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Guochun Zhao
Guochun Zhao
1
State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China3
Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China
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Tingyi Wang
1
State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China
Peter A. Cawood
2
School of Earth, Atmosphere & Environment, Monash University, Melbourne, Victoria 3800, Australia
Chunrong Diwu
1
State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China
Guochun Zhao
1
State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China3
Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China
Publisher: Geological Society of America
Received:
28 Mar 2024
Revision Received:
12 Nov 2024
Accepted:
12 Dec 2024
First Online:
13 Jan 2025
Online ISSN: 1943-2674
Print ISSN: 0016-7606
© 2025 Geological Society of America
GSA Bulletin (2025)
Article history
Received:
28 Mar 2024
Revision Received:
12 Nov 2024
Accepted:
12 Dec 2024
First Online:
13 Jan 2025
Citation
Tingyi Wang, Peter A. Cawood, Chunrong Diwu, Guochun Zhao; Neoproterozoic–early Paleozoic evolution of the southern Central Asian Orogenic Belt: Constraints from eclogites in the Beishan Orogenic Belt (NW China). GSA Bulletin 2025; doi: https://doi.org/10.1130/B37963.1
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