Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL084040 |
Investigating Fine-Scale Permeability Structure and Its Control on Hydrothermal Activity Along a Fast-Spreading Ridge (the East Pacific Rise, 9 degrees 43 '-53 ' N) Using Seismic Velocity, Poroelastic Response, and Numerical Modeling | |
Marjanovic, Milena1; Barreyre, Thibaut2; Fontaine, Fabrice J.1,3; Escartin, Javier1 | |
2019-11-05 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:21页码:11799-11810 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Norway |
英文摘要 | Along with the intracrustal heat source, crustal permeability is considered as the controlling factor for hydrothermal circulation within zero-age oceanic crust. To obtain fine-scale, 2-D models of upper crustal permeability along the East Pacific Rise 9 degrees 50N, known for prolific hydrothermal activity, we use recently derived high-resolution seismic velocity and examine a number of the existing velocity-permeability relationships. To constrain our preferred permeability model, we compare thus derived permeability models with collocated permeability estimates from poroelastic response to tidal loading at L-vent. Furthermore, using the preferred permeability result, we model hydrothermal convection in 2-D and find that the distributions of recharge and discharge zones are in good agreement with seafloor observations, including locations of the vent fields. Our results suggest that seismic velocities can be used as a tool for deriving spatial variation of permeability, which must be considered in modeling of hydrothermal flow. Plain Language Summary Crustal permeability represents one of the main controlling factors for development and persistence of hydrothermal circulation at mid-ocean ridges. However, this parameter remains poorly constrained. Using recently obtained seismic velocity model and available velocity-permeability relationships, we calculate a number of permeability models for East Pacific Rise 9 degrees 50N region, known for vigorous venting sites, including L-vent. To narrow down a wide range of upper crustal permeabilities and constrain our preferred permeability model, we use measurements obtained from poroelastic response of crustal lithologies to tides at L-vent. Our results suggest that average permeability for the first similar to 100 m of the upper oceanic crust is 10(-11.2) m(2), whereas 10(-14) m(2) characterizes the remaining part. We further evaluate our results with numerical models of hydrothermal circulation. The model that uses our preferred permeability field predicts locations of hydrothermal fluid recharge and discharge zones that are consistent with seafloor observations. Our study suggests that a growing number of high-resolution seismic velocity models can be further used to provide first-order estimates of permeability that will help us to advance our understanding behind hydrothermal processes, fluid circulation, and associated exchanges along mid-ocean ridges. |
英文关键词 | mid-ocean ridges East Pacific Rise hydrothermal circulation crustal permeability numerical modeling |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000494230800001 |
WOS关键词 | AXIAL MAGMA CHAMBER ; WAVE-FORM INVERSION ; YOUNG OCEANIC-CRUST ; DIFFERENTIAL SCHEME ; TROODOS OPHIOLITE ; HEAT-FLOW ; SYSTEMS ; DYNAMICS ; BENEATH ; DEPTH |
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/224964 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Univ Paris, CNRS, Inst Phys Globe Paris, Paris, France; 2.Univ Bergen, Dept Earth Sci, KG Jebsen Ctr Deep Sea Res, Bergen, Norway; 3.Observ Piton de la Fournaise, Ile De La Reunion, France |
推荐引用方式 GB/T 7714 | Marjanovic, Milena,Barreyre, Thibaut,Fontaine, Fabrice J.,et al. Investigating Fine-Scale Permeability Structure and Its Control on Hydrothermal Activity Along a Fast-Spreading Ridge (the East Pacific Rise, 9 degrees 43 '-53 ' N) Using Seismic Velocity, Poroelastic Response, and Numerical Modeling[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(21):11799-11810. |
APA | Marjanovic, Milena,Barreyre, Thibaut,Fontaine, Fabrice J.,&Escartin, Javier.(2019).Investigating Fine-Scale Permeability Structure and Its Control on Hydrothermal Activity Along a Fast-Spreading Ridge (the East Pacific Rise, 9 degrees 43 '-53 ' N) Using Seismic Velocity, Poroelastic Response, and Numerical Modeling.GEOPHYSICAL RESEARCH LETTERS,46(21),11799-11810. |
MLA | Marjanovic, Milena,et al."Investigating Fine-Scale Permeability Structure and Its Control on Hydrothermal Activity Along a Fast-Spreading Ridge (the East Pacific Rise, 9 degrees 43 '-53 ' N) Using Seismic Velocity, Poroelastic Response, and Numerical Modeling".GEOPHYSICAL RESEARCH LETTERS 46.21(2019):11799-11810. |
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