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《Gold》 2008-03
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Comparison of lower limit value determined by two fractal methods

Guo Chunying1,2,Gao Bangfei1,2,Xing Xuewen1,2(1.State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences;2.Key Laboratory of Lithosphere Tectonics and Litho probing Technology of Ministry of Education,China University of Geosciences)  
1 850 Au grade data from Yunnan are analyzed by two fractal methods.Both grade-sum and grade-number methods show that Au grade data have two different Multi-fractal Scaling range.Lower limit values determined by both are identical,though the former tow fractal values(0.454 and 0.872)are lower than the latter(1.973 and 1.121).Three dimensional curved face result from background removed data show more week anomalies than that of result from primitive data,while show the same strong anomalies with the later.Both background field and anomaly field show double property of concentration and dispersion.Gold concentration in background field is dispersion in integrality while week concentration locally.Gold concentration in anomaly field is high concentration in integrality while locally dispersion and continuous.
【Fund】: 国家自然科学基金项目(No.40572063);; 教育部“跨世纪人才培养计划”和教育部科技研究重点项目(No.01037);; 云南地矿资源股份公司地质科研项目(No.ykgf2006-ky1-ky2);; 中国地质大学地质过程与矿产资源国家重点实验室基金(No.GPMR0529 No.GPMR0528和No.GPMR0732)联合资助成果
【CateGory Index】: P632
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