The effect of Fe on the stability of dolomite at high pressure:   Experimental study and petrological observation in eclogite from   southwestern Tianshan, China

doi:10.1016/j.gca.2014.02.031

CORC > 北京大学 > 地球与空间科学学院

	The effect of Fe on the stability of dolomite at high pressure: Experimental study and petrological observation in eclogite from southwestern Tianshan, China
	Tao, Renbiao ; Zhang, Lifei ; Fei, Yingwei ; Liu, Qiong
刊名	geochimica et cosmochimica acta
	2014
关键词	ARAGONITE PLUS MAGNESITE CARBONATE-BEARING ECLOGITE ZERMATT-SAAS ZONE ULTRAHIGH-PRESSURE WESTERN TIANSHAN X-RAY SYSTEM CACO3-MGCO3-FECO3 HYDROTHERMAL ALTERATION METAMORPHIC ROCKS PHASE-EQUILIBRIA
DOI	10.1016/j.gca.2014.02.031
英文摘要	Subduction zone plays a significant role in deep carbon cycle. Solid-state reaction "dolomite (ankerite) = magnesite (siderite) + aragonite" has been first identified in two carbonated eclogites from southwestern Tianshan orogenic belt, China, which is the largest known ultra-high-pressure (UHP) oceanic subduction zone so far. In comparison to some other carbonates from high-pressure metamorphic rocks, carbonates from southwestern Tianshan carbonated eclogites and metapelites have high Fe content. In order to understand the effect of Fe on the stability of dolomite at high pressure, several experiments have been carried out using multi-anvil apparatus at pressures up to 8 GPa and temperature between 600 and 1200 degrees C. Both petrological observation and experimental study indicate that the stability of dolomite dramatically deceases with increasing Fe content in the solid solution of dolomite and ankerite at high pressure, and the peak pressure and temperature for the studied eclogites from southwestern Tianshan, China, are 2.5 GPa and 550 degrees C. The P-T conditions estimated according to dolomite decomposition in previous petrologic works should be revised by taking into account of the effect of Fe on the stability of dolomite at high pressure. More attention should also be paid to the effect of Fe on the stability of Fe-bearing carbonate during the decarbonation of the deep carbon cycle in the subduction zone. (C) 2014 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000344072500015&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Geochemistry & Geophysics; SCI(E); 4; ARTICLE; lfzhang@pku.edu.cn; 253-267; 143
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/155381]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Tao, Renbiao,Zhang, Lifei,Fei, Yingwei,et al. The effect of Fe on the stability of dolomite at high pressure: Experimental study and petrological observation in eclogite from southwestern Tianshan, China[J]. geochimica et cosmochimica acta,2014.
APA	Tao, Renbiao,Zhang, Lifei,Fei, Yingwei,&Liu, Qiong.(2014).The effect of Fe on the stability of dolomite at high pressure: Experimental study and petrological observation in eclogite from southwestern Tianshan, China.geochimica et cosmochimica acta.
MLA	Tao, Renbiao,et al."The effect of Fe on the stability of dolomite at high pressure: Experimental study and petrological observation in eclogite from southwestern Tianshan, China".geochimica et cosmochimica acta (2014).