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DOI | 10.1016/j.epsl.2019.115908 |
Concordant pulse in Mn, Y and HREEs concentrations during UHP eclogitic garnet growth: Transient rock dynamics along a cold subduction plate interface | |
Tan Z.; Agard P.; Gao J.; Hong T.; Wan B. | |
发表日期 | 2020 |
ISSN | 0012821X |
卷号 | 530 |
英文摘要 | We herein report strikingly concordant Mn, Y, and HREE garnet zoning in ultrahigh-pressure low-temperature oceanic eclogites found in the fossil Devonian-Carboniferous subduction plate interface in SW-Tianshan. Zr-in-rutile thermometry, thermodynamic modeling and diffusion-controlled garnet growth modeling show that this type of zoning can be explained by a short-lived transient, most likely a ∼80 °C thermal pulse (from 490 to 570 °C). This event could be as transient as ∼300 Ka, assuming a prograde to peak burial duration of 5 Ma. Such garnet zoning is observed for grains sampled meters apart (Fig. 1d) and was detected in other eclogites in the region. This transient event could reflect the short-lived movement of UHP oceanic slices, once detached, towards the hotter mantle wedge, and/or deformation-induced remobilization of fluids enhancing diffusion-controlled garnet growth. © 2019 Elsevier B.V. |
关键词 | Chinese SW-Tianshancold subduction regimediffusion modelinggarnet zoningUHP oceanic eclogiteZr-in-rutile thermometry |
英文关键词 | Diffusion; Garnets; Oxide minerals; Temperature; Thermometers; Titanium dioxide; Zirconium compounds; Zoning; Cold subduction; Diffusion model; Eclogites; Garnet zoning; Tianshan; Manganese compounds; concentration (composition); Devonian-Carboniferous boundary; eclogite; garnet; plate motion; plate tectonics; rare earth element; subduction; thermometry; zircon; Tien Shan |
语种 | 英语 |
来源期刊 | Earth and Planetary Science Letters
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/202925 |
作者单位 | State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre de Paris, ISTeP UMR 7193, Paris, F-75005, France; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China |
推荐引用方式 GB/T 7714 | Tan Z.,Agard P.,Gao J.,et al. Concordant pulse in Mn, Y and HREEs concentrations during UHP eclogitic garnet growth: Transient rock dynamics along a cold subduction plate interface[J],2020,530. |
APA | Tan Z.,Agard P.,Gao J.,Hong T.,&Wan B..(2020).Concordant pulse in Mn, Y and HREEs concentrations during UHP eclogitic garnet growth: Transient rock dynamics along a cold subduction plate interface.Earth and Planetary Science Letters,530. |
MLA | Tan Z.,et al."Concordant pulse in Mn, Y and HREEs concentrations during UHP eclogitic garnet growth: Transient rock dynamics along a cold subduction plate interface".Earth and Planetary Science Letters 530(2020). |
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