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Article: Last-stage southward subduction of the central segment of the Paleo-Asian Ocean: Insights from Middle-Late Permian granites in the Siziwangqi area in Inner Mongolia, China
| Title | Last-stage southward subduction of the central segment of the Paleo-Asian Ocean: Insights from Middle-Late Permian granites in the Siziwangqi area in Inner Mongolia, China |
|---|---|
| Authors | |
| Keywords | Central Asian Orogenic Belt Last-stage subduction Middle-late Permian North China Collage System Western segment of the Bainaimiao Arc Belt |
| Issue Date | 1-Oct-2025 |
| Publisher | Elsevier |
| Citation | Global and Planetary Change, 2025, v. 253 How to Cite? |
| Abstract | AbstractArc magmatism in collisional orogens presents persistent challenges in discriminating terminal subduction signatures due to potential overlap with slab underthrusting processes during continental convergence. This ambiguity is particularly pronounced in multi-arc accretionary systems such as the Central Asian Orogenic Belt (CAOB), where the cessation timing of Paleo-Asian Ocean (PAO) southward subduction remains contentious. We address this debate through integrated geochronological and geochemical investigations of Middle-Late Permian granitoids (252–260 Ma) from the Bainaimiao Arc Belt, a critical component of the North China Collage System. Zircon U |
| Persistent Identifier | http://hdl.handle.net/10722/366050 |
| ISSN | 2023 Impact Factor: 4.0 2023 SCImago Journal Rankings: 1.492 |
Pb data resolve two distinct magmatic phases: (1) 258–260 Ma calc-alkaline granites exhibiting arc-like signatures (enriched LILEs, depleted HFSEs), and (2) 252–254 Ma highly fractionated alkaline granites with elevated SiO2 (∼66.49–77.71 wt%), total alkalis (Na2O + K2O = ∼6.88–9.55), and diagnostic trace element ratios (Nb/Ta = ∼4.4–16.8; Zr/Hf = ∼13.5–39.2). Our findings redefine the
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Wu, Yanrong | - |
| dc.contributor.author | Zhou, Hai | - |
| dc.contributor.author | Zhao, Guochun | - |
| dc.contributor.author | Zhang, Qiqi | - |
| dc.contributor.author | Wang, Xiao | - |
| dc.contributor.author | Geng, Hongyan | - |
| dc.contributor.author | Wang, Meng | - |
| dc.contributor.author | Zhao, Shaowei | - |
| dc.contributor.author | Chen, Youxin | - |
| dc.contributor.author | Pei, Xianzhi | - |
| dc.date.accessioned | 2025-11-14T02:41:09Z | - |
| dc.date.available | 2025-11-14T02:41:09Z | - |
| dc.date.issued | 2025-10-01 | - |
| dc.identifier.citation | Global and Planetary Change, 2025, v. 253 | - |
| dc.identifier.issn | 0921-8181 | - |
| dc.identifier.uri | http://hdl.handle.net/10722/366050 | - |
| dc.description.abstract | <h2>Abstract</h2><p>Arc <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/magmatism" title="Learn more about magmatism from ScienceDirect's AI-generated Topic Pages">magmatism</a> in collisional orogens presents persistent challenges in discriminating terminal subduction signatures due to potential overlap with slab underthrusting processes during continental convergence. This ambiguity is particularly pronounced in multi-arc accretionary systems such as the Central Asian <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/orogenic-belt" title="Learn more about Orogenic Belt from ScienceDirect's AI-generated Topic Pages">Orogenic Belt</a> (CAOB), where the cessation timing of Paleo-Asian Ocean (PAO) southward subduction remains contentious. We address this debate through integrated geochronological and geochemical investigations of Middle-Late <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/permian" title="Learn more about Permian from ScienceDirect's AI-generated Topic Pages">Permian</a> <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/granitoid" title="Learn more about granitoids from ScienceDirect's AI-generated Topic Pages">granitoids</a> (252–260 Ma) from the Bainaimiao Arc Belt, a critical component of the North China Collage System. <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/zircon" title="Learn more about Zircon from ScienceDirect's AI-generated Topic Pages">Zircon</a> U<img src="https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif" alt="single bond">Pb data resolve two distinct magmatic phases: (1) 258–260 Ma calc-alkaline granites exhibiting arc-like signatures (enriched LILEs, depleted HFSEs), and (2) 252–254 Ma highly fractionated alkaline granites with elevated SiO<sub>2</sub> (∼66.49–77.71 wt%), total alkalis (Na<sub>2</sub>O + K<sub>2</sub>O = ∼6.88–9.55), and diagnostic trace element ratios (Nb/Ta = ∼4.4–16.8; Zr/Hf = ∼13.5–39.2). Our findings redefine the <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/tectonic-evolution" title="Learn more about tectonic evolution from ScienceDirect's AI-generated Topic Pages">tectonic evolution</a> of the western Bainaimiao Arc: Andean-style <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/continental-arc" title="Learn more about continental arc from ScienceDirect's AI-generated Topic Pages">continental arc</a> <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/magmatism" title="Learn more about magmatism from ScienceDirect's AI-generated Topic Pages">magmatism</a> persisted through the Carboniferous-Early <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/permian" title="Learn more about Permian from ScienceDirect's AI-generated Topic Pages">Permian</a> (>280 Ma), transitioning to hybrid arc/crustal sources with addition of the CAOB juvenile crusts during 260–280 Ma, as evidenced by increased zircon ε<sub>Hf</sub>(t) (∼ − 18 to 12), and whole-rock ε<sub>Nd</sub>(t) (∼ − 13 to −4) values with elevated SiO<sub>2</sub> (most >70.00 wt%). These 260–280 Ma arc-resembling <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/magma" title="Learn more about magmas from ScienceDirect's AI-generated Topic Pages">magmas</a>, coeval with regional A-type granites and bimodal <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/volcanism" title="Learn more about volcanism from ScienceDirect's AI-generated Topic Pages">volcanism</a>, constrain terminal PAO subduction to ∼260 Ma. Such arc-resembling magmatism has been well documented in other orogens worldwide, suggesting oceanic slab consumption during collisions as a global phenomenon. In addition, we highlight that subduction-driven magmatism is an important supplement to crustal <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/anatexis" title="Learn more about anatexis from ScienceDirect's AI-generated Topic Pages">anatexis</a> during collisions.</p> | - |
| dc.language | eng | - |
| dc.publisher | Elsevier | - |
| dc.relation.ispartof | Global and Planetary Change | - |
| dc.subject | Central Asian Orogenic Belt | - |
| dc.subject | Last-stage subduction | - |
| dc.subject | Middle-late Permian | - |
| dc.subject | North China Collage System | - |
| dc.subject | Western segment of the Bainaimiao Arc Belt | - |
| dc.title | Last-stage southward subduction of the central segment of the Paleo-Asian Ocean: Insights from Middle-Late Permian granites in the Siziwangqi area in Inner Mongolia, China | - |
| dc.type | Article | - |
| dc.identifier.doi | 10.1016/j.gloplacha.2025.104957 | - |
| dc.identifier.scopus | eid_2-s2.0-105009050906 | - |
| dc.identifier.volume | 253 | - |
| dc.identifier.eissn | 1872-6364 | - |
| dc.identifier.issnl | 0921-8181 | - |