DOI: 10.1038/s41561-020-0554-9
论文题名: Instantaneous rock transformations in the deep crust driven by reactive fluid flow
作者: Beinlich A. ; John T. ; Vrijmoed J.C. ; Tominaga M. ; Magna T. ; Podladchikov Y.Y.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2020
卷: 13, 期: 4 起始页码: 307
结束页码: 311
语种: 英语
英文关键词: advection-diffusion equation
; carbon sequestration
; continental collision
; deformation
; fluid flow
; fluid-structure interaction
; fossil
; mineral deposit
; ophiolite
; subduction zone
; tectonic plate
; transformation
英文摘要: Fluid–rock interactions are a fundamental component of geodynamic processes. They link mass and energy transfer with large-scale tectonic deformation and drive mineral deposit formation, carbon sequestration and rheological changes of the lithosphere. Spatial evidence indicates that fluid–rock interactions operate on length scales that range from the grain boundary to tectonic plates, but the timescales of regional fluid–rock interactions remain essentially unconstrained. Here we present observations from an exceptionally well-exposed fossil hydrothermal system from an ophiolite sequence in northern Norway that we use to inform a multielement advection–diffusion–reaction transport model. We calculated the velocity of the fluid-driven reaction fronts and found that they can propagate at up to 10 cm per year, equivalent to the fastest tectonic plate motion and mid-ocean-ridge spreading rates. Propagation through the low-permeability rocks of the mid-crust is facilitated by a transient, reaction-induced permeability increase. We conclude that large-scale fluid-mediated rock transformations in continental collision and subduction zones occur on timescales of tens of years when reactive fluids are present. We infer that natural carbon sequestration, ore deposit formation and transient and long-term petrophysical changes of the crust proceed instantaneously, from a geological perspective. © 2020, The Author(s), under exclusive licence to Springer Nature Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169554
Appears in Collections: 气候变化与战略
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作者单位: Department of Earth Science, University of Bergen, Bergen, Norway; The Institute for Geoscience Research (TIGeR), School of Earth and Planetary Sciences, Curtin University, Perth, WA, Australia; Institut für Geologische Wissenschaften, Freie Universität Berlin, Berlin, Germany; Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Czech Geological Survey, Prague, Czech Republic; Institute of Earth Sciences, University of Lausanne, Lausanne, Switzerland
Recommended Citation:
Beinlich A.,John T.,Vrijmoed J.C.,et al. Instantaneous rock transformations in the deep crust driven by reactive fluid flow[J]. Nature Geoscience,2020-01-01,13(4)