Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41561-020-0562-9 |
Subduction megathrust heterogeneity characterized from 3D seismic data | |
Kirkpatrick, James D.1; Edwards, Joel H.2; Verdecchia, Alessandro3; Kluesner, Jared W.4; Harrington, Rebecca M.3; Silver, Eli A.2 | |
2020-04-20 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2020 |
卷号 | 13期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; USA; Germany |
英文摘要 | Megathrust roughness and structural complexity are thought to be controls on earthquake slip at subduction zones because they result in heterogeneity in shear strength and resolved stress. However, because active megathrust faults are difficult to observe, the causes and scales of complexity are largely unknown. Here we measured the in situ properties of the megathrust of the Middle America subduction zone in a three-dimensional seismic reflection volume to determine how fault properties vary. We quantify spatial variability in the megathrust roughness, overburden and rock physical properties. Heterogeneity in the megathrust roughness exists at length scales of a few kilometres because the megathrust is dissected by active lower-plate normal faults, which offset the megathrust and renewed fault roughness. Spatial variations in the rock physical properties at the plate interface are characterized by correlation length scales of hundreds of metres. Frontal prism taper, historical seismicity and the variation in earthquake stress drop values local to the megathrust are all affected by the heterogeneity at these length scales. Both geometric and rheological complexities may therefore control the mechanical behaviour of the subduction plate interface, which includes earthquake rupture characteristics. Geometric and rheological complexities may control the mechanical behaviour of megathrusts, according to an analysis of the heterogeneity in roughness and rock properties of the Middle America megathrust from 3D seismic reflection data. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000527513700001 |
WOS关键词 | STRESS DROP ; COSTA-RICA ; ZONE ; EARTHQUAKE ; THRUST ; SLIP ; THICKNESS ; DYNAMICS ; OFFSHORE ; MODEL |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
URL | 查看原文 |
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/249264 |
专题 | 地球科学 气候变化 |
作者单位 | 1.McGill Univ, Dept Earth & Planetary Sci, Montreal, PQ, Canada; 2.Univ Calif Santa Cruz, Earth & Planetary Sci, Santa Cruz, CA 95064 USA; 3.Ruhr Univ Bochum, Inst Geol Mineral & Geophys, Bochum, Germany; 4.US Geol Survey, Pacific Coastal & Marine Sci Ctr, Santa Cruz, CA USA |
推荐引用方式 GB/T 7714 | Kirkpatrick, James D.,Edwards, Joel H.,Verdecchia, Alessandro,et al. Subduction megathrust heterogeneity characterized from 3D seismic data[J]. NATURE GEOSCIENCE,2020,13(5). |
APA | Kirkpatrick, James D.,Edwards, Joel H.,Verdecchia, Alessandro,Kluesner, Jared W.,Harrington, Rebecca M.,&Silver, Eli A..(2020).Subduction megathrust heterogeneity characterized from 3D seismic data.NATURE GEOSCIENCE,13(5). |
MLA | Kirkpatrick, James D.,et al."Subduction megathrust heterogeneity characterized from 3D seismic data".NATURE GEOSCIENCE 13.5(2020). |
条目包含的文件 | 条目无相关文件。 |
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。
修改评论