Two-stage spin transition of iron in FeAl-bearing phase D at lower   mantle

doi:10.1002/2016JB013209

CORC > 北京大学 > 地球与空间科学学院

	Two-stage spin transition of iron in FeAl-bearing phase D at lower mantle
	Wu, Xiang ; Wu, Ye ; Lin, Jung-Fu ; Liu, Jin ; Mao, Zhu ; Guo, Xinzhuan ; Yoshino, Takashi ; McCammon, Catherine ; Prakapenka, Vitali B. ; Xiao, Yuming
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
	2016
关键词	phase D spin transition of iron lower mantle HYDROUS MAGNESIUM SILICATES EQUATION-OF-STATE HIGH-PRESSURE BOND SYMMETRIZATION ELASTIC PROPERTIES SUBDUCTED SLABS WATER TRANSPORT DEEP EARTH DIFFRACTION STABILITY
DOI	10.1002/2016JB013209
英文摘要	Hydrous magnesium silicate phase D plays a key role in the transport of water from the upper to the lower mantle via subducted slabs. Here we report pressure dependence hyperfine and lattice parameters of FeAl-bearing phase D up to megabar pressures using synchrotron nuclear forward scattering and X-ray diffraction in a diamond anvil cell at room temperature. FeAl-bearing phase D undergoes a two-stage high-spin to low-spin transition of iron for Fe2+ at 37-41GPa and for Fe3+ at 64-68GPa. These transitions are accompanied by an increase in density and a significant softening in the bulk modulus and bulk velocity at their respective pressure range. The occurrence of the dense low-spin FeAl-bearing phase D with relatively high velocity anisotropies in deep-subducted slabs can potentially contribute to small-scale seismic heterogeneities in the middle-lower mantle beneath the circum-Pacific area.; DOE-NNSA [DE-NA0001974]; DOE-BES [DE-FG02-99ER45775]; DOE Office of Science by Argonne National Laboratory [DE-AC02-06CH11357]; National Science Foundation of China [U1232204, 41473056]; U.S. National Science Foundation; SCI(E); ARTICLE; wuxiang@cug.edu.cn; afu@jsg.utexas.edu; 9; 6411-6420; 121
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/458917]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Wu, Xiang,Wu, Ye,Lin, Jung-Fu,et al. Two-stage spin transition of iron in FeAl-bearing phase D at lower mantle[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2016.
APA	Wu, Xiang.,Wu, Ye.,Lin, Jung-Fu.,Liu, Jin.,Mao, Zhu.,...&Xiao, Yuming.(2016).Two-stage spin transition of iron in FeAl-bearing phase D at lower mantle.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH.
MLA	Wu, Xiang,et al."Two-stage spin transition of iron in FeAl-bearing phase D at lower mantle".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2016).