• 中国科技核心期刊
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扫描电子显微镜对花岗岩中主要矿物裂隙作用的研究

Moustafa El Omella, 唐春安, 张哲

Moustafa El Omella, 唐春安, 张哲. 扫描电子显微镜对花岗岩中主要矿物裂隙作用的研究[J]. 地质与资源, 2004, 13(3): 129-136.
引用本文: Moustafa El Omella, 唐春安, 张哲. 扫描电子显微镜对花岗岩中主要矿物裂隙作用的研究[J]. 地质与资源, 2004, 13(3): 129-136.
Moustafa El Omella, TANG Chun-an, ZHANG Zhe. SCANNING OF ESSENTIAL MINERALS IN GRANITE ELECTRON MICROSCOPE STUDY ON THE MICROFRACTURE BEHAVIOR[J]. Geology and Resources, 2004, 13(3): 129-136.
Citation: Moustafa El Omella, TANG Chun-an, ZHANG Zhe. SCANNING OF ESSENTIAL MINERALS IN GRANITE ELECTRON MICROSCOPE STUDY ON THE MICROFRACTURE BEHAVIOR[J]. Geology and Resources, 2004, 13(3): 129-136.

扫描电子显微镜对花岗岩中主要矿物裂隙作用的研究

基金项目: 

This study was supported by the China Scholarship Council (Grant No.160)

National Nature Science Foundation of China(Grant No.400722006) and the Key Task Project of Science and Technology of Liaoning Province (Grant No.2001230001).

详细信息
  • 中图分类号: P619.222;O482

SCANNING OF ESSENTIAL MINERALS IN GRANITE ELECTRON MICROSCOPE STUDY ON THE MICROFRACTURE BEHAVIOR

Funds: 

This study was supported by the China Scholarship Council (Grant No.160)

National Nature Science Foundation of China(Grant No.400722006) and the Key Task Project of Science and Technology of Liaoning Province (Grant No.2001230001).

  • 摘要: 微裂隙对于岩石的物理性质有重要影响.通过光学显微镜对显微裂隙进行的观察,难以将薄片的制作过程中产生的裂隙同自然裂隙区分;其次,观测的裂隙大小限制在0.1mm或以上数量级,一些重要细节观察不到.扫描电镜的高放大倍数和三维分辨率使其成为适合于裂隙研究的理想工具.利用扫描电镜观测了浙江花岗岩在室温下由51.6MPa压力产生的裂隙的发育过程.观察花岗岩的表面以研究其微裂隙和矿物的解理、晶形及破裂作用.微裂隙分为3种类型:晶体内裂隙(完全发育在颗粒内部),晶体间裂隙(穿过颗粒边界进入其他颗粒中),颗粒边界裂隙(沿颗粒边界发育或与边界重合).本研究中的花岗岩为中-粗粒(1~6mm),经过蚀变,约含40%斜长石,25%钾长石,25%石英,10%镁铁矿物(主要为黑云母和白云母).
    Abstract: Granitic samples from Zhejiang Province, Southeast of China, were tested in a uniaxial condition to failure at constant confining pressure. It is found from careful Scanning Electron Microscope (SEM) observations that fractures form the intersection or coalescence of microcavities. Granite consists of three major minerals, Quartz, feldspar (K-feldspar &Plagioclase) and biotite. The cracks in various minerals of the specimen develop differently; this obvious difference in crack patterns is believed to result from the nature of their microstructures. Careful observation shows that quartz display brittle and isotropic crack while feldspar and biotite exhibit anisotropic cracks and the separating of their cleavage planes (cleavage cracks) is the one of the major failure forms of biotite and feldspar. From the tectonic point of view, the granite has been strongly deformed and hydrothermally altered; such hydrothermal fluids may be keep the system open for fluid movement to cause alteration metasomatism of granite.
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出版历程
  • 收稿日期:  2003-09-10
  • 修回日期:  2004-05-17
  • 网络出版日期:  2022-12-29
  • 发布日期:  2004-09-29

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