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DOI:
地质力学学报:2001,7(2):130-138
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辉长岩脆-塑性转化及其影响因素的高温高压实验研究
(1.中国地质大学, 湖北武汉 430074;2.中国地震局地质研究所构造物理开放实验室, 北京 100029)
AN EXPERIMENTAL STUDY ON THE BRITTLE-PLASTIC TRANSITION IN GABBRO
(1.China university of Geoscience, Wuhan 430074, China;2.Institute of Geology, China Seismological Bureau, Beijing 100029, China)
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投稿时间:2001-03-05    
中文摘要: 本文利用高温高压多功能三轴实验装置,以NaCl为固体围压传压介质,在围压为450MPa~800MPa,温度区间为600℃~1150℃和应变速率为1×10-4~3.125×10-6/s条件下,对攀枝花辉长岩进行了流变学实验研究。实验结果表明,辉长岩围压在450MPa~800MPa条件下,温度在600℃时为脆性变形,700℃~850℃时为半塑性流动,含微破裂,大于900℃时为塑性流动。辉长岩的脆-塑性转化温度为700℃~900℃,主要影响因素为温度、围压和应变速率,同时存在双相流变学问题。
Abstract:In this paper,an experimental study of brittle-ductile transition in Panzhihua fine grained gabbro was performed under a Griggs-type apparatus with NaCl as the confining pressure medium. Experiments were conducted in conditions of:450MPa~800MPa confining pressure,600℃~1150℃ temperature,and 1×10-4~3.125×10-6/s strain rate.The results of experiments show that the deformation of the gabbro is brittle fractures at temperature 600℃,semibrittle flow at 700℃~850℃,and plastic flow at temperature higher than 900℃.The temperature of brittle plastic transition is 700℃~900℃ at the confining pressure 450MPa~800MPa.The major factors that influence the brittle-plastic transition in the gabbro are temperature and strain rate,and the influence of confining pressure is secondary.
文章编号:     中图分类号:P588.5;O52    文献标志码:
基金项目:国家自然科学基金项目(编号:49633120);国家重点基础发展规划项目(编号:G1998040704);中国地震局构造物理开放实验室项目(编号:9806)
引用文本:
桑祖南,周永胜,何昌荣,等,2001.辉长岩脆-塑性转化及其影响因素的高温高压实验研究[J].地质力学学报,7(2):130-138.DOI:
SANG Zu-nan,ZHOU Yong-sheng,HE Chang-rong,et al,2001.AN EXPERIMENTAL STUDY ON THE BRITTLE-PLASTIC TRANSITION IN GABBRO[J].Journal of Geomechanics,7(2):130-138.DOI:

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