Thermodynamic and Elastic Properties of Magnesite at Mantle Conditions: First-Principles Calculations

doi:10.1029/2017GC007396

CORC > 海洋研究所 > 中国科学院海洋研究所 > 深海极端环境与生命过程研究中心

	Thermodynamic and Elastic Properties of Magnesite at Mantle Conditions: First-Principles Calculations
	Yao, Chao 1,2; Wu, Zhongqing 1,2; Zou, Fan 1,2; Sun, Weidong3,4,5
刊名	GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
	2018-08-01
卷号	19 期号:8 页码:2719-2731
ISSN号	1525-2027
DOI	10.1029/2017GC007396
通讯作者	Wu, Zhongqing(wuzq10@ustc.edu.cn)
英文摘要	Magnesite (MgCO3) is a likely main host of carbonates in the mantle and plays an important role in the transport and storage of carbon in the Earth's mantle. Its physical properties at high pressure and high temperature (PT) are crucial for understanding the deep carbon cycle. Here we investigated thermodynamic and elastic properties of magnesite under the mantle PT conditions using first-principles calculations with local density approximation (LDA). Magnesite has the seismic velocities close to those of forsterite. The effect of the magnesite on seismic velocity of the carbonated peridotite and eclogite is subtle in the upper mantle. However, magnesite has much smaller seismic velocities and far larger elastic anisotropy than major minerals in the transition zone and lower mantle. The enrichment of magnesite in the transition zone and lower mantle will likely produce seismically detectable low-velocity zone and velocity anisotropy.
资助项目	Strategic Priority Research Program (B) of Chinese Academy of Sciences[XDB18000000] ; State Key Development Program of Basic Research of China[2014CB845905] ; National Natural Science Foundation of China[41721002] ; Fundamental Research Funds for the Central Universities[WK2080000078] ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase)[U1501501] ; China Scholarship Council (CSC)[201506340051]
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000452122500025
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/155772]
专题	海洋研究所_深海极端环境与生命过程研究中心
通讯作者	Wu, Zhongqing
作者单位	1.Univ Sci & Technol China, Sch Earth & Space Sci, Lab Seismol & Phys Earths Interior, Hefei, Anhui, Peoples R China 2.Univ Sci & Technol China, Sch Earth & Space Sci, Mengcheng Natl Geophys Observ, Hefei, Anhui, Peoples R China 3.Chinese Acad Sci, Inst Oceanog, Ctr Deep Sea Res, Qingdao, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China 5.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Yao, Chao,Wu, Zhongqing,Zou, Fan,et al. Thermodynamic and Elastic Properties of Magnesite at Mantle Conditions: First-Principles Calculations[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2018,19(8):2719-2731.
APA	Yao, Chao,Wu, Zhongqing,Zou, Fan,&Sun, Weidong.(2018).Thermodynamic and Elastic Properties of Magnesite at Mantle Conditions: First-Principles Calculations.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,19(8),2719-2731.
MLA	Yao, Chao,et al."Thermodynamic and Elastic Properties of Magnesite at Mantle Conditions: First-Principles Calculations".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 19.8(2018):2719-2731.