High-pressure experimental verification of rutile-ilmenite oxybarometer:   Implications for the redox state of the subduction zone

doi:10.1007/s11430-016-9082-5

CORC > 北京大学 > 地球与空间科学学院

	High-pressure experimental verification of rutile-ilmenite oxybarometer: Implications for the redox state of the subduction zone
	Tao, RenBiao ; Zhang, LiFei ; Stagno, Vincenzo ; Chu, Xu ; Liu, Xi
刊名	SCIENCE CHINA-EARTH SCIENCES
	2017
关键词	High-pressure experiment Ilmenite-rutile oxybarometer Oxygen fugacity Subduction zone C-O-H OXYGEN-BAROMETER OXIDATION-STATE PHASE-EQUILIBRIA SOLID-SOLUTIONS EARTHS MANTLE FERRIC IRON FE SIDERITE METAMORPHISM
DOI	10.1007/s11430-016-9082-5
英文摘要	The more oxidized mantle peridotites above subducting slabs than stable continental areas have been attributed to the infiltration of some oxidizing fluids released from the subducting slabs. However, knowledge for the redox states of the slabs itself is very limited. Until now, few oxybarometers can be directly used to constrain the redox states of the subducting slabs. The rutile-ilmenite oxybarometer was proposed and successfully applied to constrain the oxygen fugacity of mantle assemblages. However, its application to rocks equilibrated at crustal P-T conditions has been hampered by some uncertainties in an early solid solution model of ilmenite. With a newly-released solid solution model for the ilmenite, we have conducted high-P experiments (at 3 and 5 GPa, and 900-1300A degrees C) to test the accuracy of this oxybarometer. The experiments were performed with their oxygen fugacities controlled by the CCO buffer (i.e., C+O-2=CO2). We demonstrated that the oxygen fugacities calculated for our high-P experimental products by using the rutile-ilmenite oxybarometer were in excellent agreement with the fO(2) dictated by the CCO buffer, suggesting a wide applicability of this oxybarometer to crust rocks. As examples, the rutile-ilmenite oxybarometer has been used to constrain the oxygen fugacities of some metamorphic rocks such as eclogite, granulite and amphibolite usually observed from the subduction zones.; National Natural Science Foundation of China [41520104004, 41502038]; China Postdoctoral Science Foundation [2015M570009]; SCI(E); ARTICLE; 10; 1817-1825; 60
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/470575]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Tao, RenBiao,Zhang, LiFei,Stagno, Vincenzo,et al. High-pressure experimental verification of rutile-ilmenite oxybarometer: Implications for the redox state of the subduction zone[J]. SCIENCE CHINA-EARTH SCIENCES,2017.
APA	Tao, RenBiao,Zhang, LiFei,Stagno, Vincenzo,Chu, Xu,&Liu, Xi.(2017).High-pressure experimental verification of rutile-ilmenite oxybarometer: Implications for the redox state of the subduction zone.SCIENCE CHINA-EARTH SCIENCES.
MLA	Tao, RenBiao,et al."High-pressure experimental verification of rutile-ilmenite oxybarometer: Implications for the redox state of the subduction zone".SCIENCE CHINA-EARTH SCIENCES (2017).