Tectonic Evolution and Mineralization of the Dabie Orogen

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Geochemistry and Geochronology".

Deadline for manuscript submissions: 31 July 2024 | Viewed by 282

Special Issue Editors


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Guest Editor
School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China
Interests: orogenic dynamics and fault tectonics; metallogenic tectonic framework

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Guest Editor
School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, China
Interests: metamorphic petrology and sedimentary chronology of orogenic belts
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Guest Editor
School of Earth Sciences and Engineering, Sun Yat-Sen University, Guangzhou 510120, China
Interests: low-temperature chronology methods and their applications in structural geology, geomorphological evolution, and mineral exploration
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Dabie Orogen in East China was created by the Triassic northwards subduction of the South China Block beneath the North China Block, and it exposes the largest area of UHP metamorphic rocks in the world, with the Sulu Orogen in the northeast.

Although studies on the Dabie Orogen have been in operation for more than 40 years, there are still many unresolved problems. For example, as one of the largest ultra-high-pressure terranes in the world, what is its exhumation process and mechanism? The Dabie Orogen underwent intense extension during the post-collisional stage, resulting in extensive magmatism and mineralization, but the mechanism of this post-collisional extension is still controversial. The post-collisional extension process resulted in large volumes of orogenic materials being eroded and transported to the surrounding basins, which causes a lack of partial evolution formations of the orogenic belt. Moreover, the Dabie Orogen is located within both the Tethys tectonic domain and the Paleo-Pacific tectonic domain. Therefore, research on this orogenic belt can not only provide information for the evolution process of each of the two tectonic domains but also provide evidence for their interaction.

In order to discover the tectonic evolution process of the Dabie Orogen, a large number of works have been continuously carried out in recent years, including petrology, stratigraphy, structural geology, geochemistry and geochronology, geophysics, etc. These works have elucidated new understanding of and made progress in the tectonic evolution and mineralization of the Dabie Orogen. This Special Issue is a platform for showing these new achievements.

Prof. Dr. Yongsheng Wang
Prof. Dr. Yonghong Shi
Dr. Ruxin Ding
Guest Editors

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Keywords

  • subduction and exhumation process and mechanism
  • coupling evolution of orogenic belt and basins
  • post-collisional magmatism and mineralization
  • low-temperature thermochronology
  • deep structure of orogenic belt

Published Papers (1 paper)

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Research

16 pages, 10745 KiB  
Article
Determination of the Formation Time of the Present Tectonic Framework in the Dabie Orogen, Eastern China: Zircon U-Pb Geochronology and Al-in-Hornblende Geobarometer
by Yongsheng Wang, Juanhao Yang, Qiao Bai, Xu Zhang and Zhensheng Li
Minerals 2024, 14(6), 562; https://doi.org/10.3390/min14060562 - 29 May 2024
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Abstract
The Dabie–Sulu Orogen hosts the largest province of ultrahigh-pressure (UHP) rocks in the world. The post-collisional extension eroded and transported volumes of rocks from the Dabie Orogen to adjacent basins, causing a lack of information about the orogen and thus obstructing our understanding [...] Read more.
The Dabie–Sulu Orogen hosts the largest province of ultrahigh-pressure (UHP) rocks in the world. The post-collisional extension eroded and transported volumes of rocks from the Dabie Orogen to adjacent basins, causing a lack of information about the orogen and thus obstructing our understanding of the exhumation process of UHP rocks. In addition, the mechanisms that triggered the post-collisional extension and affected the petrological-tectonic units of the orogen are still unclear. This study is focused on the time in which the present tectonic framework in the Dabie Orogen took place, selecting Early Cretaceous plutons in the eastern part of the orogen and carrying out detailed zircon LA-ICP-MS U-Pb dating and crystallization depth calculation. The zircon dating results show that the emplacement time of the Meichuan and Luannitan plutons and the Penghe superunit of the Zhubuyuan pluton are all ~128 Ma, while the Huangbai superunit of the Zhubuyuan pluton and the Longmianzhai pluton formed at ~125 Ma. The emplacement time and later anatexis of the Baimajian pluton occurred at ~128 and ~122 Ma, respectively. The results of the Al-in-hornblende geobarometer show that plutons of ~128 Ma have a similar crystallization depth, while plutons of ~125 Ma range from 7.6 to 9.5 km. The Baimajian pluton has a greater crystallization depth. Combined with the existing achievements, a conclusion can be drawn that the present tectonic framework of the Dabie Orogen began to form from ~128 Ma. Full article
(This article belongs to the Special Issue Tectonic Evolution and Mineralization of the Dabie Orogen)
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