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  2. 地质与地球物理研究所
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  4. 中国科学院矿产资源研究重点实验室
Slab-derived devolatilization fluids oxidized by subducted metasedimentary rocks

文献类型：期刊论文

作者Ague, Jay J.1,2; Tassara, Santiago1; Holycross, Megan E.3; Ji-Lei Li4,5; Cottrell, Elizabeth6; Schwarzenbach, Esther M.7; Fassoulas, Charalampos8; John, Timm7
刊名NATURE GEOSCIENCE
出版日期2022-03-17
页码12
ISSN号1752-0894
DOI10.1038/s41561-022-00904-7
英文摘要Metasedimentary rocks atop the downgoing slab oxidize ascending slab-derived dehydration fluids by removing reduced species, according to petrological analysis of subduction complex metasedimentary rocks and reactive transport modelling. Metamorphic devolatilization of subducted slabs generates aqueous fluids that ascend into the mantle wedge, driving the partial melting that produces arc magmas. These magmas have oxygen fugacities some 10-1,000 times higher than magmas generated at mid-ocean ridges. Whether this oxidized magmatic character is imparted by slab fluids or is acquired during ascent and interaction with the surrounding mantle or crust is debated. Here we study the petrology of metasedimentary rocks from two Tertiary Aegean subduction complexes in combination with reactive transport modelling to investigate the oxidative potential of the sedimentary rocks that cover slabs. We find that the metasedimentary rocks preserve evidence for fluid-mediated redox reactions and could be highly oxidized. Furthermore, the modelling demonstrates that layers of these oxidized rocks less than about 200 m thick have the capacity to oxidize the ascending slab dehydration flux via redox reactions that remove H-2, CH4 and/or H2S from the fluids. These fluids can then oxidize the overlying mantle wedge at rates comparable to arc magma generation rates, primarily via reactions involving sulfur species. Oxidized metasedimentary rocks need not generate large amounts of fluid themselves but could instead oxidize slab dehydration fluids ascending through them. Proposed Phanerozoic increases in arc magma oxygen fugacity may reflect the recycling of oxidative weathering products following Neoproterozoic-Palaeozoic marine and atmospheric oxygenation.
WOS关键词PRESSURE METAMORPHIC ROCKS ; OXIDATION-STATE ; CHEMICAL-COMPOSITION ; REDOX BUDGET ; ZONES ; FLOW ; OXYGEN ; CONSTRAINTS ; EVOLUTION ; CYCLADES
资助项目US National Science Foundation Directorate of Geosciences[EAR-0105927] ; US National Science Foundation Directorate of Geosciences[EAR-0744154] ; US National Science Foundation Directorate of Geosciences[EAR-1650329] ; US National Science Foundation Directorate of Geosciences[EAR-1855208] ; Yale University ; Yale Peabody Museum of Natural History ; Bateman Postdoctoral Fellowship, Department of Earth and Planetary Sciences, Yale University ; National Natural Science Foundation of China[42122011] ; Deutsche Forschungsgemeinschaft (DFG)[CRC 1114] ; Deutsche Forschungsgemeinschaft (DFG)[235221301]
WOS研究方向Geology
语种英语
WOS记录号WOS:000770230700001
出版者NATURE PORTFOLIO
资助机构US National Science Foundation Directorate of Geosciences ; US National Science Foundation Directorate of Geosciences ; Yale University ; Yale University ; Yale Peabody Museum of Natural History ; Yale Peabody Museum of Natural History ; Bateman Postdoctoral Fellowship, Department of Earth and Planetary Sciences, Yale University ; Bateman Postdoctoral Fellowship, Department of Earth and Planetary Sciences, Yale University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Deutsche Forschungsgemeinschaft (DFG) ; Deutsche Forschungsgemeinschaft (DFG) ; US National Science Foundation Directorate of Geosciences ; US National Science Foundation Directorate of Geosciences ; Yale University ; Yale University ; Yale Peabody Museum of Natural History ; Yale Peabody Museum of Natural History ; Bateman Postdoctoral Fellowship, Department of Earth and Planetary Sciences, Yale University ; Bateman Postdoctoral Fellowship, Department of Earth and Planetary Sciences, Yale University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Deutsche Forschungsgemeinschaft (DFG) ; Deutsche Forschungsgemeinschaft (DFG) ; US National Science Foundation Directorate of Geosciences ; US National Science Foundation Directorate of Geosciences ; Yale University ; Yale University ; Yale Peabody Museum of Natural History ; Yale Peabody Museum of Natural History ; Bateman Postdoctoral Fellowship, Department of Earth and Planetary Sciences, Yale University ; Bateman Postdoctoral Fellowship, Department of Earth and Planetary Sciences, Yale University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Deutsche Forschungsgemeinschaft (DFG) ; Deutsche Forschungsgemeinschaft (DFG) ; US National Science Foundation Directorate of Geosciences ; US National Science Foundation Directorate of Geosciences ; Yale University ; Yale University ; Yale Peabody Museum of Natural History ; Yale Peabody Museum of Natural History ; Bateman Postdoctoral Fellowship, Department of Earth and Planetary Sciences, Yale University ; Bateman Postdoctoral Fellowship, Department of Earth and Planetary Sciences, Yale University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Deutsche Forschungsgemeinschaft (DFG) ; Deutsche Forschungsgemeinschaft (DFG)
源URL[http://ir.iggcas.ac.cn/handle/132A11/105009]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Ague, Jay J.
作者单位1.Yale Univ, Dept Earth & Planetary Sci, New Haven, CT 06520 USA
2.Yale Peabody Museum Nat Hist, New Haven, CT 06511 USA
3.Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY USA
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing, Peoples R China
5.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
6.Smithsonian Inst, Natl Museum Nat Hist, Dept Mineral Sci, Washington, DC 20560 USA
7.Free Univ Berlin, Inst Geol Wissensch, Berlin, Germany
8.Univ Crete, Nat Hist Museum Crete, Iraklion, Greece
推荐引用方式
GB/T 7714		 Ague, Jay J.,Tassara, Santiago,Holycross, Megan E.,et al. Slab-derived devolatilization fluids oxidized by subducted metasedimentary rocks[J]. NATURE GEOSCIENCE,2022:12.
APA Ague, Jay J..,Tassara, Santiago.,Holycross, Megan E..,Ji-Lei Li.,Cottrell, Elizabeth.,...&John, Timm.(2022).Slab-derived devolatilization fluids oxidized by subducted metasedimentary rocks.NATURE GEOSCIENCE,12.
MLA Ague, Jay J.,et al."Slab-derived devolatilization fluids oxidized by subducted metasedimentary rocks".NATURE GEOSCIENCE (2022):12.

入库方式： OAI收割

来源：地质与地球物理研究所

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