| 热水条件下斜长石和辉石断层泥的摩擦滑动研究 |
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| 引用本文： | 罗丽,何昌荣. 热水条件下斜长石和辉石断层泥的摩擦滑动研究[J]. 地震地质, 2009, 31(1): 84-96. DOI: 10.3969/j.issn.0253-4967.2009.01.008 |
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| 作者姓名： | 罗丽 何昌荣 |
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| 作者单位： | 中国地震局地质研究所,地震动力学国家重点实验室,北京,100029;中国地震局地质研究所,地震动力学国家重点实验室,北京,100029 |
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| 基金项目： | 国家自然科学基金，地震行业科研专项基金 |
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| 摘 要： | 在热水条件下对辉长岩的2种主要组成矿物斜长石和辉石进行了摩擦滑动实验研究。结果表明:1)斜长石在整个实验温度范围内(<607℃)显示速度弱化,而辉石除了在200℃附近表现出微弱的速度强化外,在其他温度范围也都表现为速度弱化;2)斜长石在低温时强度随温度的升高而略有增加,高温时强度则随温度的升高而降低。辉石的摩擦强度随着温度的增加没有系统性的变化,在0.74上下波动;3)在热水条件下辉长岩的摩擦性质并不是这2种主要矿物的叠加,有可能是辉长岩中的次要矿物的存在导致了辉长岩的速度强化;4)本实验所得热水条件下的实验结果与干燥条件下的结果有很大差异,再一次表明水的存在极大地影响了岩石的摩擦稳定性
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| 关 键 词： | 斜长石 辉石 辉长岩 摩擦强度 速率依赖性 |
| 收稿时间： | 2009-01-22 |
FRICTIONAL SLIDING OF PYROXENE AND PLAGIOCLASE GOUGES UNDER HYDROTHERMAL CONDITIONS |
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| LUO Li,HE Chang-rong. FRICTIONAL SLIDING OF PYROXENE AND PLAGIOCLASE GOUGES UNDER HYDROTHERMAL CONDITIONS[J]. Seismology and Geology, 2009, 31(1): 84-96. DOI: 10.3969/j.issn.0253-4967.2009.01.008 |
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| Authors: | LUO Li HE Chang-rong |
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| Affiliation: | State Key Laboratory of Earthquake Dynamics;Institute of Geology;China Earthquake Administration;Beijing 100029;China |
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| Abstract: | As frictional sliding of rocks is closely related to faulting and earthquake activities,it is essential to properly describe its constitutive relations.Dieterich proposed a preliminary rate-dependent constitutive law based on his experimental studies.After the refinement by Ruina,the constitutive relation has come to the form that we are currently familiar with,known as the rate-and state-dependent constitutive laws.The parameter a-b in the friction laws has been shown to be important in controlling the sta... |
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| Keywords: | plagioclase pyroxene gabbro friction coefficient velocity dependence velocity weakening |
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