气候变化领域集成服务门户(CCPortal): Concordant pulse in Mn, Y and HREEs concentrations during UHP eclogitic garnet growth: Transient rock dynamics along a cold subduction plate interface

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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-Tianshan cold subduction regime diffusion modeling garnet zoning UHP oceanic eclogite Zr-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
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).