SCANNING OF ESSENTIAL MINERALS IN GRANITE ELECTRON MICROSCOPE STUDY ON THE MICROFRACTURE BEHAVIOR
Moustafa El Omella1,2, TANG Chun-an1, ZHANG Zhe3
1. Center for Rockbursts and Induced Seismicity Research, Northeastern University, Shenyang 110004, China; 2. Geology Department, Suez Canal University, Egypt; 3. Shenyang Institute of Geology and Mineral Resources, Shenyang 110033, China
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.
基金资助: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).
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. GEOLOGY AND RESOURCES, 2004, 13(3): 129-136.
2004, Vol. 13 
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