气候变化领域集成服务门户(CCPortal): Redox-Induced Destabilization of Dolomite at Earth's Mantle Transition Zone

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DOI	10.1007/s12583-021-1410-6
	Redox-Induced Destabilization of Dolomite at Earth's Mantle Transition Zone
	Zhai, Tianlei; Huang, Shengxuan; Qin, Shan; Niu, Jingjing; Gong, Yu
通讯作者	Qin, S (通讯作者)
发表日期	2021
ISSN	1674-487X
EISSN	1867-111X
起始页码	880
结束页码	886
卷号	32 期号:4
英文摘要	Carbonates are considered to be important hosts of oxidized carbon during subduction processes. Here we investigate the redox interactions between dolomite and metallic iron in laser-heated diamond anvil cells up to similar to 20 GPa. The identification of recovered samples via in-situ synchrotron X-ray diffraction and ex-situ Raman spectroscopy shows that the reaction occurs with the formation of ferropericlase, graphite and hexagonal diamond, while CaCO3 remains stable. The experimental results indicate dolomite and metallic iron phases cannot coexist and demonstrate a possible formation mechanism of ultradeep diamonds via redox reaction between dolomite and iron under the mantle transition zone conditions. The results are significant for understanding carbon transportation during subduction processes and have further implications to the processes in the more complex systems regarding to carbonate-silicate-metal phase relations.
关键词	X-RAY-DIFFRACTION HIGH-PRESSURE OCEANIC-CRUST RAMAN-SPECTROSCOPY 6 GPA CARBON IRON MAGNESITE INCLUSIONS REDUCTION
英文关键词	deep carbon cycle; carbonates; interaction; dolomite; high pressure
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000686580000013
来源期刊	JOURNAL OF EARTH SCIENCE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260192
推荐引用方式 GB/T 7714	Zhai, Tianlei,Huang, Shengxuan,Qin, Shan,et al. Redox-Induced Destabilization of Dolomite at Earth's Mantle Transition Zone[J]. 中国科学院青藏高原研究所,2021,32(4).
APA	Zhai, Tianlei,Huang, Shengxuan,Qin, Shan,Niu, Jingjing,&Gong, Yu.(2021).Redox-Induced Destabilization of Dolomite at Earth's Mantle Transition Zone.JOURNAL OF EARTH SCIENCE,32(4).
MLA	Zhai, Tianlei,et al."Redox-Induced Destabilization of Dolomite at Earth's Mantle Transition Zone".JOURNAL OF EARTH SCIENCE 32.4(2021).