A Newly Identified "Proto-Kenting Mélange (S. Taiwan)" Represents a Missing Link for a Continuous Early Cretaceous Paleo-Pacific Subduction-Accretion System
文献类型：期刊论文
| 作者 | Zhao, Qi8; Yan, Yi8; Tonai, Satoshi7; Dilek, Yildirim6; Carter, Andrew5; Clift, Peter D.3,4; Wu, Jonny2; Sibuet, Jean-Claude1; Zhang, Xinchang8 |
| 刊名 | TECTONICS
 |
| 出版日期 | 2025-02-01 |
| 卷号 | 44期号:2页码:21 |
| 关键词 | paleo-Pacific plate subduction continental margin of east Asia OPS m & eacute illite age dating micro-chemical analysis langes |
| ISSN号 | 0278-7407 |
| DOI | 10.1029/2024TC008456 |
| 英文摘要 | Most m & eacute;langes in exhumed subduction-accretion complexes are polygenetic, recording significant information about the nature of geological processes during their formation. Here, we apply micro-chemical analysis and illite K-Ar dating to constrain the deformation mechanism and timing of the pervasively sheared scaly matrix in the accretionary complex rocks presently known as "Kenting M & eacute;lange" in the Hengchun Peninsula (South Taiwan). Our results reveal that parts of the matrix were formed in Cretaceous (96.7 +/- 8.6 Ma and 108 +/- 18.4 Ma) due to pressure solution. These new, older matrix ages suggest that the Kenting M & eacute;lange, which was considered as Cenozoic and interpreted to have been associated with the subduction of the South China Sea, preserves different primary chaotic units (e.g., m & eacute;lange and/or olistostrome). Our findings imply the Kenting M & eacute;lange is actually polygenetic and allow part of Kenting M & eacute;lange that we named the "proto-Kenting M & eacute;lange" to be interpreted as a remnant of a primary m & eacute;lange, which was mixed and/or juxtaposed in the Cenozoic Kenting M & eacute;lange. The block-in-matrix fabric with a pervasively sheared scaly muddy matrix, along with the preservation of slightly older oceanic crust blocks, suggests that the proto-Kenting M & eacute;lange is most likely an ocean plate stratigraphy m & eacute;lange. This unit initially formed near a Paleo-Pacific subduction margin during the latest Early Cretaceous. Our results reveal a nearly 3000-km-long physical archive of latest Early Cretaceous subduction-accretion processes, which took place adjacent to the continental margin of East Asia during the consumption of Paleo-Pacific ocean floor during the latest Mesozoic. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001425200200001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/82672]  |
| 专题 | 深地室 |
| 通讯作者 | Yan, Yi |
| 作者单位 | 1.Ifremer Ctr Brest, Plouzane, France 2.Univ Arizona, Dept Geosci, Tucson, AZ USA 3.Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA USA 4.UCL, Dept Earth Sci, London, England 5.Univ London, Sch Nat Sci, Birkbeck, London, England 6.Miami Univ, Dept Geol & Environm Earth Sci, Oxford, OH USA 7.Kochi Univ, Fac Sci & Technol, Kochi, Japan 8.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Deep Earth Proc & Resources, Guangzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Qi,Yan, Yi,Tonai, Satoshi,et al. A Newly Identified "Proto-Kenting Mélange (S. Taiwan)" Represents a Missing Link for a Continuous Early Cretaceous Paleo-Pacific Subduction-Accretion System[J]. TECTONICS,2025,44(2):21. |
| APA | Zhao, Qi.,Yan, Yi.,Tonai, Satoshi.,Dilek, Yildirim.,Carter, Andrew.,...&Zhang, Xinchang.(2025).A Newly Identified "Proto-Kenting Mélange (S. Taiwan)" Represents a Missing Link for a Continuous Early Cretaceous Paleo-Pacific Subduction-Accretion System.TECTONICS,44(2),21. |
| MLA | Zhao, Qi,et al."A Newly Identified "Proto-Kenting Mélange (S. Taiwan)" Represents a Missing Link for a Continuous Early Cretaceous Paleo-Pacific Subduction-Accretion System".TECTONICS 44.2(2025):21. |
入库方式： OAI收割
来源：广州地球化学研究所
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