GSTDTAP  > 气候变化
DOI10.1029/2019GL085975
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
ISSN0094-8276
EISSN1944-8007
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
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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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