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DOI | 10.1073/pnas.1616216114 |
Hydration-reduced lattice thermal conductivity of olivine in Earth's upper mantle | |
Chang, Yun-Yuan1; Hsieh, Wen-Pin1; Tan, Eh1; Chen, Jiuhua2,3 | |
2017-04-18 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:16页码:4078-4081 |
文章类型 | Article |
语种 | 英语 |
国家 | Taiwan; Peoples R China; USA |
英文摘要 | Earth's water cycle enables the incorporation of water (hydration) in mantle minerals that can influence the physical properties of the mantle. Lattice thermal conductivity of mantle minerals is critical for controlling the temperature profile and dynamics of the mantle and subducting slabs. However, the effect of hydration on lattice thermal conductivity remains poorly understood and has often been assumed to be negligible. Here we have precisely measured the lattice thermal conductivity of hydrous San Carlos olivine (Mg0.9Fe0.1)(2)SiO4 (Fo90) up to 15 gigapascals using an ultrafast optical pump-probe technique. The thermal conductivity of hydrous Fo90 with similar to 7,000 wt ppm water is significantly suppressed at pressures above similar to 5 gigapascals, and is approximately 2 times smaller than the nominally anhydrous Fo90 at mantle transition zone pressures, demonstrating the critical influence of hydration on the lattice thermal conductivity of olivine in this region. Modeling the thermal structure of a subducting slab with our results shows that the hydration-reduced thermal conductivity in hydrated oceanic crust further decreases the temperature at the cold, dry center of the subducting slab. Therefore, the olivine-wadsleyite transformation rate in the slab with hydrated oceanic crust is much slower than that with dry oceanic crust after the slab sinks into the transition zone, extending the metastable olivine to a greater depth. The hydration-reduced thermal conductivity could enable hydrous minerals to survive in deeper mantle and enhance water transportation to the transition zone. |
英文关键词 | hydration thermal conductivity geodynamics metastable olivine subducting slab |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399387400041 |
WOS关键词 | NOMINALLY ANHYDROUS MINERALS ; SAN CARLOS OLIVINE ; TRANSITION-ZONE ; DEEP EARTH ; WATER ; DIFFUSIVITY ; PRESSURE ; LITHOSPHERE ; CALIBRATION ; WADSLEYITE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
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/204690 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Acad Sinica, Inst Earth Sci, Taipei 11529, Taiwan; 2.Ctr High Pressure Sci & Technol Adv Res, Changchun 130012, Peoples R China; 3.Florida Int Univ, Ctr Study Matter Extreme Condit, Miami, FL 33911 USA |
推荐引用方式 GB/T 7714 | Chang, Yun-Yuan,Hsieh, Wen-Pin,Tan, Eh,et al. Hydration-reduced lattice thermal conductivity of olivine in Earth's upper mantle[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(16):4078-4081. |
APA | Chang, Yun-Yuan,Hsieh, Wen-Pin,Tan, Eh,&Chen, Jiuhua.(2017).Hydration-reduced lattice thermal conductivity of olivine in Earth's upper mantle.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(16),4078-4081. |
MLA | Chang, Yun-Yuan,et al."Hydration-reduced lattice thermal conductivity of olivine in Earth's upper mantle".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.16(2017):4078-4081. |
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