Thermoelastic Properties of Eclogitic Garnets and Omphacites: Implications for Deep Subduction of Oceanic Crust and Density Anomalies in the Upper Mantle

CORC > 地球化学研究所 > 中国科学院地球化学研究所 > 地球内部物质高温高压实验室

	Thermoelastic Properties of Eclogitic Garnets and Omphacites: Implications for Deep Subduction of Oceanic Crust and Density Anomalies in the Upper Mantle
	Jingui Xu; Dongzhou Zhang; Dawei Fan; Przemyslaw Dera; Feng Shi; Wenge Zhou
刊名	Geophysical Research Letters
	2019
页码	179-188
英文摘要	Synchrotron-based high pressure-temperature single-crystal X-ray diffraction experiments to ~24 GPa and 700 K were conducted on eclogitic garnets (low-Fe: Prp28Alm38Grs33Sps1 and high-Fe: Prp14Alm62Grs19Adr3Sps2) and omphacites (low-Fe: Quad57Jd42Ae1 and high-Fe: Quad53Jd27Ae20), using externally-heated diamond anvil cell. Fitting the pressure-volumetemperature data to a third-order Birch-Murnaghan equation of state yields the thermoelastic parameters including bulk modulus (KT0), its pressure derivative (K′T0), temperature derivative ((∂KT/∂T)P) and thermal expansion coefficient (αT). The densities of the high-Fe and low-Fe eclogites were then modeled along typical geotherms of the normal mantle and the subducted oceanic crust to the transition zone depth (550 km). The metastable low-Fe eclogite could be a reason for the stagnant slabs within the upper range of the transition zone. Eclogite would be responsible for density anomalies within 100-200 km in the upper mantle of Asia.
语种	英语
内容类型	期刊论文
源URL	[http://ir.gyig.ac.cn/handle/42920512-1/10613]
专题	地球化学研究所_地球内部物质高温高压实验室
作者单位	1.State Key Laboratory of Geological Processes and Mineral Resources, China University of Geoscience, Wuhan, China 2.Hawaii Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, Hawaii, USA 3.Key Laboratory of High Temperature and High-Pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China
推荐引用方式 GB/T 7714	Jingui Xu；Dongzhou Zhang；Dawei Fan；Przemyslaw Dera；Feng Shi；Wenge Zhou. Thermoelastic Properties of Eclogitic Garnets and Omphacites: Implications for Deep Subduction of Oceanic Crust and Density Anomalies in the Upper Mantle[J]. Geophysical Research Letters,2019:179-188.
APA	Jingui Xu；Dongzhou Zhang；Dawei Fan；Przemyslaw Dera；Feng Shi；Wenge Zhou.(2019).Thermoelastic Properties of Eclogitic Garnets and Omphacites: Implications for Deep Subduction of Oceanic Crust and Density Anomalies in the Upper Mantle.Geophysical Research Letters,179-188.
MLA	Jingui Xu；Dongzhou Zhang；Dawei Fan；Przemyslaw Dera；Feng Shi；Wenge Zhou."Thermoelastic Properties of Eclogitic Garnets and Omphacites: Implications for Deep Subduction of Oceanic Crust and Density Anomalies in the Upper Mantle".Geophysical Research Letters (2019):179-188.