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DOI | 10.1029/2019GL085975 |
Decreasing Magnetization, Lithospheric Flexure, and Rejuvenated Hydrothermalism off the Japan-Kuril Subduction Zone | |
Choe, Hanjin; Dyment, Jerome | |
2020-05-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | France |
英文摘要 | Seafloor spreading magnetic anomalies formed at mid-ocean ridges initially display strong amplitudes that decay within the first 10 million years as a result of pervasive hydrothermal circulation and alteration. The amplitudes do not vary much for older oceanic crust, suggesting that the thickening sediments hinder heat advection. Here we show, however, that a systematic loss of similar to 20% in the amplitude of the anomalies arises between the outer rise and the trench on old ocean crust approaching the Japan and Kuril subduction zones. We interpret this decay as reflecting the opening of normal faults and fissures caused by extension on the outer flexural rise and the subsequent renewed circulation of seawater into the oceanic crust, resulting in additional alteration of the magnetic minerals. This interpretation is supported by higher heat flow and seismic velocity changes observed toward the trench. |
英文关键词 | hydrothermal circulation marine magnetic anomaly subduction zone outer rise bending oceanic crust |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000536639500036 |
WOS关键词 | THERMAL STRUCTURE ; PLATE ; ANOMALIES ; CIRCULATION ; HYDRATION ; BENEATH ; MARGIN ; CRUST ; MODEL |
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/279899 |
专题 | 气候变化 |
作者单位 | Univ Paris, Inst Phys Globe Paris, Paris, France |
推荐引用方式 GB/T 7714 | Choe, Hanjin,Dyment, Jerome. Decreasing Magnetization, Lithospheric Flexure, and Rejuvenated Hydrothermalism off the Japan-Kuril Subduction Zone[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(9). |
APA | Choe, Hanjin,&Dyment, Jerome.(2020).Decreasing Magnetization, Lithospheric Flexure, and Rejuvenated Hydrothermalism off the Japan-Kuril Subduction Zone.GEOPHYSICAL RESEARCH LETTERS,47(9). |
MLA | Choe, Hanjin,et al."Decreasing Magnetization, Lithospheric Flexure, and Rejuvenated Hydrothermalism off the Japan-Kuril Subduction Zone".GEOPHYSICAL RESEARCH LETTERS 47.9(2020). |
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