铁橄榄石高温高压流变性的实验研究

doi:10.3969/j.issn.1000-0569.2007.11.023

CORC > 北京大学 > 地球与空间科学学院

	铁橄榄石高温高压流变性的实验研究; Experimental study of high temperature and high pressure rheology of fayalite
	赵永红 ; 李小凡 ; 李扬
刊名	岩石学报
	2007
关键词	铁橄榄石粘性高温蠕变三轴压缩实验研究 fayalite olivine viscosity high temperature creep three dimensional compression experimental study
DOI	10.3969/j.issn.1000-0569.2007.11.023
英文摘要	通过高温高压实验研究了铁橄榄石集合体的流变性。首先,利用高精度的Paterson气体介质变形装置对铁橄榄石集合体Fe_2SiO_4进行了高温三轴压缩蠕变试验。变形试验条件为:温度1273～1423K,围压300MPa,差应力10～250MPa,应变率10~(-7)～10~(-4)s~(-1),试件的最大变形量不超过20%。利用三维非线性拟合方法对蠕变试验数据进行分析,得到铁橄榄石集合体的微观变形机制为扩散域和位错域,扩散域的应力指数为1左右。位错蠕变域中,干燥铁橄榄石集合体的应力指数为5.4,活化能为781kJ/mol;含水铁橄榄石集合体的应力指数为3.4,活化能为516kJ/mol。实验结果...; The high temperature and high pressure rheology of fayalite olivine was studied in this paper. Tri-axial compressive creep experiments were performed on anhydrous as well as hydrous fine-grained fayalite olivine samples. Samples were deformed in a gas-medium apparatus at a confining pressure of 300MPa, a temperature between 1273 and 1423 K, a differential stress 10 - 25OMPa, a strain rate 10(-7) - 10(-4)S(-1), and the maximum accumulative strain 20%, respectively, for each sample. The samples were deformed both in the diffusion and the dislocation creep regime. From three dimensional global non-linear fitting of the test data, the stress exponent was determined as 5. 4 for anhydrous fayalite olivine and 3.4 for hydrous fayalite olivine samples in dislocation creep regime, respectively, and the activation energy is 781kJ/mol for dry fayalite and 516kJ/mol for wet fayalite olivine samples, respectively. These hydrous samples creep at a rate over a factor of 10 faster than those anhydrous samples under the same deformation conditions. Therefore, this paper gives a preliminary test result of effect of temperature and water on the viscosity of fayalite olivine aggregates.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000254139500023&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 5; 11; 2927-2932; 23
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/84065]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	赵永红,李小凡,李扬. 铁橄榄石高温高压流变性的实验研究, Experimental study of high temperature and high pressure rheology of fayalite[J]. 岩石学报,2007.
APA	赵永红,李小凡,&李扬.(2007).铁橄榄石高温高压流变性的实验研究.岩石学报.
MLA	赵永红,et al."铁橄榄石高温高压流变性的实验研究".岩石学报 (2007).