Inferring the Paleo-Location of Proto-Arc Magmas During Subduction Infancy in the Izu-Bonin-Mariana
文献类型：期刊论文
| 作者 | Ribeiro, Julia M.1; Gerya, Taras2 |
| 刊名 | GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
 |
| 出版日期 | 2024-04-01 |
| 卷号 | 25期号:4页码:13 |
| 关键词 | Izu-Bonin-Mariana southern Mariana fore-arc rifts subduction infancy near-trench spreading subduction evolution magma generation depth paleo-trench slab paleo-depth |
| DOI | 10.1029/2023GC011153 |
| 英文摘要 | Subduction zones are one of the principal drivers of the modern-day plate tectonics, but the processes that develop as incipient subduction zones mature are yet to be understood. Finding modern analogs for different stages of subduction infancy remains an outstanding challenge to answer questions on how and when an oceanic subduction zone reaches a quasi-steady state to become long-lived. Here, we compare the southern Mariana intra-oceanic arc, in which near-trench spreading and infant arc magmatism developed similar to 3-4 Myr ago, with the Izu-Bonin-Mariana (IBM) proto-arc magmas that formed during subduction infancy similar to 52 Myr ago. Building upon this comparison, we propose that the Southern Mariana may be considered as a modern analog to subduction infancy. The similarities between the Southern Mariana arc magmas and the IBM Eocene proto-arc magmas suggest that the IBM proto-arc crust might have formed within 80-90 km from the paleo-trench (slab at < 90 km paleo-depth), while the Eocene infant arc was likely located at similar to 100 km from the paleo-trench (similar to 100-125 km slab paleo-depth). We use our constraints further to propose a new conceptual model of subduction evolution for IBM. In this model, development of the subduction channel during arc infancy facilitated downward slab penetration and intensified corner flow in the sub-arc asthenosphere of the mantle wedge. As such, cooling and serpentinization of the fore-arc mantle might be considered as the principal drivers of subduction maturation and stabilization over the IBM lifetime. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001196453400001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/77154]  |
| 专题 | 中国科学院广州地球化学研究所 |
| 通讯作者 | Ribeiro, Julia M. |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou, Peoples R China 2.Swiss Fed Inst Technol, Inst Geophys, Dept Earth Sci, Zurich, Switzerland |
| 推荐引用方式 GB/T 7714 | Ribeiro, Julia M.,Gerya, Taras. Inferring the Paleo-Location of Proto-Arc Magmas During Subduction Infancy in the Izu-Bonin-Mariana[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2024,25(4):13. |
| APA | Ribeiro, Julia M.,&Gerya, Taras.(2024).Inferring the Paleo-Location of Proto-Arc Magmas During Subduction Infancy in the Izu-Bonin-Mariana.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,25(4),13. |
| MLA | Ribeiro, Julia M.,et al."Inferring the Paleo-Location of Proto-Arc Magmas During Subduction Infancy in the Izu-Bonin-Mariana".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 25.4(2024):13. |
入库方式： OAI收割
来源：广州地球化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。