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Keywords = Zhangbaling tectonic belt

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17 pages, 6172 KiB  
Article
The Mid-Cretaceous Tectonothermal Evolution of the Zhangbaling Tectonic Belt, East China: Evidence from Zircon (U–Th)/He and Detrital Zircon U–Pb Dating
by Yongsheng Wang, Qiao Bai, Weiwei Ma, Juanhao Yang and Zhensheng Li
Minerals 2023, 13(9), 1142; https://doi.org/10.3390/min13091142 - 30 Aug 2023
Cited by 3 | Viewed by 1421
Abstract
The Zhangbaling tectonic belt (ZTB), one of the most representative tectonic belts in East China, has experienced uplift since the Early Cretaceous and is, thus, an excellent object for understanding the tectonic uplift and topographical evolution of East China and the whole of [...] Read more.
The Zhangbaling tectonic belt (ZTB), one of the most representative tectonic belts in East China, has experienced uplift since the Early Cretaceous and is, thus, an excellent object for understanding the tectonic uplift and topographical evolution of East China and the whole of East Asia. On the basis of field observations, in this contribution to the literature, we carried out detrital zircon LA-ICP-MS U–Pb dating for the Upper Cretaceous sediments in the basins adjacent to the ZTB and zircon (U–Th)/He dating for the Early Cretaceous plutons along the western flank of this belt. Detailed field observation showed that the orthogneiss of the Feidong Complex experienced sinistral strike–slip activities, while the marbles underwent thrusting; thrust faults were developed in the Early Cretaceous plutons and volcanic rocks, and normal faults were superimposed on thrust or strike–slip faults. The detrital zircon dating results showed that the Upper Cretaceous sediments are characterized by an Early Cretaceous major cluster with just a minor cluster from the middle Neoproterozoic ages, indicating that the Zhangbaling Group and the Feidong Complex of the ZTB are not their main provenance. Zircon (U–Th)/He dating results showed that the ZTB experienced rapid uplifting during the mid-Cretaceous and recorded another rapid uplifting after 30 Ma. Combining existing research with our new data, it can be concluded that the ZTB was characterized by thrust activity in the mid-Cretaceous, which occurred under regional compression setting and was the basis of the formation of a watershed after 30 Ma. Full article
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