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DOI | 10.1038/NGEO2865 |
Fluid escape from subduction zones controlled by channel-forming reactive porosity | |
Plumper, Oliver1,2; John, Timm3; Podladchikov, Yuri Y.4; Vrijmoed, Johannes C.3,5; Scambelluri, Marco6 | |
2017-02-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | Netherlands; Norway; Germany; Switzerland; Italy |
英文摘要 | Water within the oceanic lithosphere is returned to Earth's surface at subduction zones. Observations of metamorphosed veins preserved in exhumed slabs suggest that fluid can escape via channel networks. Yet, it is unclear how such channels form that allow chemically bound water to escape the subducting slab as the high pressures during subduction reduce the porosity of rocks to nearly zero. Here we use multiscale rock analysis combined with thermodynamic modelling to show that fluid flow initiation in dehydrating serpentinites is controlled by intrinsic chemical heterogeneities, localizing dehydration reactions at specific microsites. Porosity generation is directly linked to the dehydration reactions and resultant fluid pressure variations force the reactive fluid release to organize into vein networks across a wide range of spatial scales (mu m to m). This fluid channelization results in large-scale fluid escape with sufficient fluxes to drain subducting plates. Moreover, our findings suggest that antigorite dehydration reactions do not cause instantaneous rock embrittlement, often presumed as the trigger of intermediate-depth subduction zone seismicity. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394121800021 |
WOS关键词 | INTERMEDIATE-DEPTH EARTHQUAKES ; ANTIGORITE DEHYDRATION ; BEARING ASSEMBLAGES ; CONTINENTAL-CRUST ; THERMAL RUNAWAY ; WESTERN ALPS ; FLOW ; SERPENTINITE ; PERMEABILITY ; DEFORMATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35136 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Utrecht, Dept Earth Sci, Budapestlaan 4, NL-3584 CD Utrecht, Netherlands; 2.Univ Oslo, PGP, N-0136 Oslo, Norway; 3.Free Univ Berlin, Inst Geol Wissensch, Malteserstr 74-100, D-12249 Berlin, Germany; 4.Univ Lausanne, Inst Earth Sci, CH-1015 Lausanne, Switzerland; 5.Swiss Fed Inst Technol, Dept Earth Sci, Sonneggstr 5, CH-8092 Zurich, Switzerland; 6.Univ Genoa, Dipartimento Sci Terra Ambiente & Vita, Corso Europa 26, I-16132 Genoa, Italy |
推荐引用方式 GB/T 7714 | Plumper, Oliver,John, Timm,Podladchikov, Yuri Y.,et al. Fluid escape from subduction zones controlled by channel-forming reactive porosity[J]. NATURE GEOSCIENCE,2017,10(2). |
APA | Plumper, Oliver,John, Timm,Podladchikov, Yuri Y.,Vrijmoed, Johannes C.,&Scambelluri, Marco.(2017).Fluid escape from subduction zones controlled by channel-forming reactive porosity.NATURE GEOSCIENCE,10(2). |
MLA | Plumper, Oliver,et al."Fluid escape from subduction zones controlled by channel-forming reactive porosity".NATURE GEOSCIENCE 10.2(2017). |
条目包含的文件 | 条目无相关文件。 |
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